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Home My WebLink AboutLab results for Costco UDCs and PipingDate of Report: 09/11/2023 Paolo Dizon Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Client Project:24000047 BCL Project: BCL Work Order: Enclosed are the results of analyses for samples received by the laboratory on 9/5/2023. If you have any questions concerning this report, please feel free to contact me. Invoice ID: 2317020 Costco Bakersfield B482564 Contact Person: Eli Velazquez Sincerely, Client Service Rep Stuart Buttram Operations Manager Certifications: CA ELAP #1186; NV #CA00014; OR ELAP #4032-001; AK UST101 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 1 of 89Report ID: 1001454770 Table of Contents Sample Information Chain of Custody and Cooler Receipt form................................................................................................................................................................ 4 Laboratory / Client Sample Cross Reference................................................................................................................................................................ 12 Sample Results 2317020-01 - DL1-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 18 2317020-02 - DL1-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 19 2317020-03 - DL2-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 20 2317020-04 - DL2-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 21 2317020-05 - GL1-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 22 2317020-06 - GL1-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 23 2317020-07 - GL2-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 24 2317020-08 - GL2-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 25 2317020-09 - GL3-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 26 2317020-10 - GL3-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 27 2317020-11 - GL4-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 28 2317020-12 - GL4-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 29 2317020-13 - GL5-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 30 2317020-14 - GL5-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 31 2317020-15 - GL6-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 32 2317020-16 - GL6-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 33 2317020-17 - GL7-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 34 2317020-18 - GL7-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 35 2317020-19 - GL8-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 36 2317020-20 - GL8-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 37 2317020-21 - GL9-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 38 2317020-22 - GL9-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 39 2317020-23 - GD1-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 40 2317020-24 - GD1-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 41 2317020-25 - GL10-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 42 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 2 of 89Report ID: 1001454770 Table of Contents 2317020-26 - GL10-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 43 2317020-27 - GD2-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 44 2317020-28 - GD2-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 45 2317020-29 - GL11-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 46 2317020-30 - GL11-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 47 2317020-31 - GD3-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 48 2317020-32 - GD3-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 49 2317020-33 - GL12-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 50 2317020-34 - GL12-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 51 2317020-35 - DD1-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 52 2317020-36 - DD1-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 53 2317020-37 - DL3-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 54 2317020-38 - DL3-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 55 2317020-39 - DL4-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 56 2317020-40 - DL4-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 57 2317020-41 - AST1-2 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 58 2317020-42 - AST1-6 Volatile Organic Analysis (EPA Method 8260B/5035)................................................................................................................................................................ 59 Quality Control Reports Volatile Organic Analysis (EPA Method 8260B/5035) Method Blank Analysis................................................................................................................................................................ 60 Laboratory Control Sample................................................................................................................................................................ 62 Precision and Accuracy................................................................................................................................................................ 63 Subcontract Reports wo_2317020_sub_pactn.pdf................................................................................................................................................................ 65 Notes Notes and Definitions................................................................................................................................................................ 89 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 3 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 1 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 4 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 2 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 5 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 3 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 6 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 4 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 7 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 5 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 8 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 6 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 9 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 7 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 10 of 89Report ID: 1001454770 Chain of Custody and Cooler Receipt Form for 2317020 Page 8 of 8 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 11 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-01 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL1-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 09:10 Solids Mason DosseySampled By:Sample Type:Soil 2317020-02 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL1-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 09:30 Solids Mason DosseySampled By:Sample Type:Soil 2317020-03 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL2-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 09:40 Solids Mason DosseySampled By:Sample Type:Soil 2317020-04 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL2-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 09:50 Solids Mason DosseySampled By:Sample Type:Soil 2317020-05 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL1-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:10 Solids Mason DosseySampled By:Sample Type:Soil 2317020-06 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL1-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:20 Solids Mason DosseySampled By:Sample Type:Soil 2317020-07 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL2-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:15 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 12 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-08 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL2-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:25 Solids Mason DosseySampled By:Sample Type:Soil 2317020-09 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL3-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:40 Solids Mason DosseySampled By:Sample Type:Soil 2317020-10 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL3-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 10:45 Solids Mason DosseySampled By:Sample Type:Soil 2317020-11 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL4-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 11:05 Solids Mason DosseySampled By:Sample Type:Soil 2317020-12 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL4-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 11:15 Solids Mason DosseySampled By:Sample Type:Soil 2317020-13 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL5-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 11:55 Solids Mason DosseySampled By:Sample Type:Soil 2317020-14 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL5-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:00 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 13 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-15 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL6-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:10 Solids Mason DosseySampled By:Sample Type:Soil 2317020-16 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL6-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:15 Solids Mason DosseySampled By:Sample Type:Soil 2317020-17 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL7-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:20 Solids Mason DosseySampled By:Sample Type:Soil 2317020-18 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL7-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:25 Solids Mason DosseySampled By:Sample Type:Soil 2317020-19 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL8-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:35 Solids Mason DosseySampled By:Sample Type:Soil 2317020-20 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL8-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:40 Solids Mason DosseySampled By:Sample Type:Soil 2317020-21 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL9-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:45 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 14 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-22 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL9-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 12:50 Solids Mason DosseySampled By:Sample Type:Soil 2317020-23 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD1-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:00 Solids Mason DosseySampled By:Sample Type:Soil 2317020-24 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD1-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:05 Solids Mason DosseySampled By:Sample Type:Soil 2317020-25 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL10-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:15 Solids Mason DosseySampled By:Sample Type:Soil 2317020-26 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL10-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:20 Solids Mason DosseySampled By:Sample Type:Soil 2317020-27 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD2-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:25 Solids Mason DosseySampled By:Sample Type:Soil 2317020-28 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD2-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:30 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 15 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-29 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL11-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:40 Solids Mason DosseySampled By:Sample Type:Soil 2317020-30 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL11-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:45 Solids Mason DosseySampled By:Sample Type:Soil 2317020-31 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD3-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:50 Solids Mason DosseySampled By:Sample Type:Soil 2317020-32 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GD3-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 13:55 Solids Mason DosseySampled By:Sample Type:Soil 2317020-33 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL12-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:05 Solids Mason DosseySampled By:Sample Type:Soil 2317020-34 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- GL12-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:10 Solids Mason DosseySampled By:Sample Type:Soil 2317020-35 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DD1-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:15 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 16 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Laboratory / Client Sample Cross Reference Laboratory Client Sample Information 2317020-36 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DD1-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:20 Solids Mason DosseySampled By:Sample Type:Soil 2317020-37 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL3-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:30 Solids Mason DosseySampled By:Sample Type:Soil 2317020-38 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL3-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:35 Solids Mason DosseySampled By:Sample Type:Soil 2317020-39 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL4-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:45 Solids Mason DosseySampled By:Sample Type:Soil 2317020-40 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- DL4-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 14:50 Solids Mason DosseySampled By:Sample Type:Soil 2317020-41 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- AST1-2 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 15:05 Solids Mason DosseySampled By:Sample Type:Soil 2317020-42 Sampling Point: Sampling Location: Project Number: COC Number:--- --- --- AST1-6 Receive Date: Sampling Date: Sample Depth: Lab Matrix: --- 09/05/2023 16:15 09/05/2023 15:10 Solids Mason DosseySampled By:Sample Type:Soil The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 17 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-01 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL1-2, 9/5/2023 9:10:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)133 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.4 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)98.7 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 14:33 EAB MS-V17 1.064 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 18 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-02 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL1-6, 9/5/2023 9:30:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.6 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 17:21 EAB MS-V17 1.059 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 19 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-03 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL2-2, 9/5/2023 9:40:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00088ND0.0065 EPA-8260B 1ND Ethylbenzene mg/kg 0.00090ND0.0065 EPA-8260B 1ND Naphthalene mg/kg 0.0013ND0.0065 EPA-8260B 1ND Toluene mg/kg 0.00090ND0.0065 EPA-8260B 1ND Total Xylenes mg/kg 0.0033ND0.013 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0020ND0.0065 EPA-8260B 1ND o-Xylene mg/kg 0.0012ND0.0065 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.3 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)100 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 17:43 EAB MS-V17 1.309 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 20 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-04 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL2-6, 9/5/2023 9:50:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.3 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 18:04 EAB MS-V17 0.980 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 21 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-05 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL1-2, 9/5/2023 10:10:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00081ND0.0061 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00089ND0.0061 EPA-8260B 1ND Ethylbenzene mg/kg 0.00084ND0.0061 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00068ND0.0061 EPA-8260B 1ND Naphthalene mg/kg 0.0012ND0.0061 EPA-8260B 1ND Toluene mg/kg 0.00084ND0.0061 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00061ND0.0061 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.015ND0.061 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00069ND0.0061 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00061ND0.0061 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0018ND0.0061 EPA-8260B 1ND o-Xylene mg/kg 0.0011ND0.0061 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.070ND0.24 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)95.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)97.4 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 18:26 EAB MS-V17 1.214 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 22 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-06 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL1-6, 9/5/2023 10:20:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00085ND0.0063 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00093ND0.0063 EPA-8260B 1ND Ethylbenzene mg/kg 0.00088ND0.0063 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00071ND0.0063 EPA-8260B 1ND Naphthalene mg/kg 0.0013ND0.0063 EPA-8260B 1ND Toluene mg/kg 0.00088ND0.0063 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.015ND0.063 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00072ND0.0063 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0019ND0.0063 EPA-8260B 1ND o-Xylene mg/kg 0.0012ND0.0063 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.074ND0.25 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)124 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.0 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)100 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 18:48 EAB MS-V17 1.269 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 23 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-07 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL2-2, 9/5/2023 10:15:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)121 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.7 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 19:09 EAB MS-V17 1.014 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 24 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-08 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL2-6, 9/5/2023 10:25:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.8 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 19:31 EAB MS-V17 1.053 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 25 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-09 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL3-2, 9/5/2023 10:40:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.6 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 19:53 EAB MS-V17 0.963 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 26 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-10 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL3-6, 9/5/2023 10:45:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.7 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)100 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 20:14 EAB MS-V17 1.055 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 27 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-11 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL4-2, 9/5/2023 11:05:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)99.8 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 20:37 EAB MS-V17 1.016 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 28 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-12 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL4-6, 9/5/2023 11:15:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 20:58 EAB MS-V17 1.071 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 29 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-13 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL5-2, 9/5/2023 11:55:00AM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.1 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 21:20 EAB MS-V17 0.969 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 30 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-14 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL5-6, 9/5/2023 12:00:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 21:41 EAB MS-V17 0.963 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 31 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-15 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL6-2, 9/5/2023 12:10:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.0 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 22:03 EAB MS-V17 1.016 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 32 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-16 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL6-6, 9/5/2023 12:15:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)125 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.2 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 22:25 EAB MS-V17 0.998 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 33 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-17 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL7-2, 9/5/2023 12:20:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)124 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.2 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 22:46 EAB MS-V17 1.025 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 34 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-18 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL7-6, 9/5/2023 12:25:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/06/23 23:08 EAB MS-V17 1.075 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 35 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-19 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL8-2, 9/5/2023 12:35:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00075ND0.0056 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00082ND0.0056 EPA-8260B 1ND Ethylbenzene mg/kg 0.00077ND0.0056 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00063ND0.0056 EPA-8260B 1ND Naphthalene mg/kg 0.0011ND0.0056 EPA-8260B 1ND Toluene mg/kg 0.00077ND0.0056 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00056ND0.0056 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.013ND0.056 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00064ND0.0056 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00056ND0.0056 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0017ND0.0056 EPA-8260B 1ND o-Xylene mg/kg 0.0010ND0.0056 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.065ND0.22 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.4 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/07/23 04:32 EAB MS-V17 1.119 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 36 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-20 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL8-6, 9/5/2023 12:40:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00085ND0.0063 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00092ND0.0063 EPA-8260B 1ND Ethylbenzene mg/kg 0.00087ND0.0063 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00071ND0.0063 EPA-8260B 1ND Naphthalene mg/kg 0.0013ND0.0063 EPA-8260B 1ND Toluene mg/kg 0.00087ND0.0063 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.015ND0.063 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00072ND0.0063 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0019ND0.0063 EPA-8260B 1ND o-Xylene mg/kg 0.0012ND0.0063 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.073ND0.25 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)124 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:00 09/07/23 04:53 EAB MS-V17 1.266 B173475EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 37 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-21 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL9-2, 9/5/2023 12:45:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)101 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/06/23 21:54 BYM MS-V18 1.109 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 38 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-22 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL9-6, 9/5/2023 12:50:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)113 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)101 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 00:19 BYM MS-V18 0.943 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 39 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-23 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD1-2, 9/5/2023 1:00:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)114 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.2 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 00:43 BYM MS-V18 1.016 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 40 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-24 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD1-6, 9/5/2023 1:05:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00074ND0.0056 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00081ND0.0056 EPA-8260B 1ND Ethylbenzene mg/kg 0.00077ND0.0056 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00062ND0.0056 EPA-8260B 1ND Naphthalene mg/kg 0.0011ND0.0056 EPA-8260B 1ND Toluene mg/kg 0.00077ND0.0056 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00056ND0.0056 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.013ND0.056 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00063ND0.0056 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00056ND0.0056 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0017ND0.0056 EPA-8260B 1ND o-Xylene mg/kg 0.0010ND0.0056 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.064ND0.22 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.7 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 01:07 BYM MS-V18 1.111 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 41 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-25 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL10-2, 9/5/2023 1:15:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00084ND0.0063 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00092ND0.0063 EPA-8260B 1ND Ethylbenzene mg/kg 0.00087ND0.0063 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00071ND0.0063 EPA-8260B 1ND Naphthalene mg/kg 0.0012ND0.0063 EPA-8260B 1ND Toluene mg/kg 0.00087ND0.0063 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.015ND0.063 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00072ND0.0063 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00063ND0.0063 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0019ND0.0063 EPA-8260B 1ND o-Xylene mg/kg 0.0012ND0.0063 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.073ND0.25 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)120 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)101 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 01:31 BYM MS-V18 1.259 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 42 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-26 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL10-6, 9/5/2023 1:20:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)115 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.3 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)103 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 01:55 BYM MS-V18 1.033 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 43 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-27 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD2-2, 9/5/2023 1:25:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)116 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)100 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)99.4 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 02:19 BYM MS-V18 1.044 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 44 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-28 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD2-6, 9/5/2023 1:30:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)105 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 02:43 BYM MS-V18 1.035 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 45 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-29 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL11-2, 9/5/2023 1:40:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)99.8 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 03:07 BYM MS-V18 1.092 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 46 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-30 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL11-6, 9/5/2023 1:45:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)116 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)101 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 03:31 BYM MS-V18 1.018 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 47 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-31 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD3-2, 9/5/2023 1:50:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00076ND0.0057 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00083ND0.0057 EPA-8260B 1ND Ethylbenzene mg/kg 0.00078ND0.0057 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00063ND0.0057 EPA-8260B 1ND Naphthalene mg/kg 0.0011ND0.0057 EPA-8260B 1ND Toluene mg/kg 0.00078ND0.0057 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00057ND0.0057 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.014ND0.057 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00064ND0.0057 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00057ND0.0057 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0017ND0.0057 EPA-8260B 1ND o-Xylene mg/kg 0.0011ND0.0057 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.066ND0.23 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)117 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)101 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 03:55 BYM MS-V18 1.131 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 48 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-32 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GD3-6, 9/5/2023 1:55:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)117 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)100 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)99.2 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 04:19 BYM MS-V18 1.035 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 49 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-33 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL12-2, 9/5/2023 2:05:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)119 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)100 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 04:44 BYM MS-V18 1.016 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 50 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-34 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN GL12-6, 9/5/2023 2:10:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)118 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 05:08 BYM MS-V18 1.002 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 51 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-35 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DD1-2, 9/5/2023 2:15:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)117 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)102 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)103 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 05:32 BYM MS-V18 0.988 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 52 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-36 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DD1-6, 9/5/2023 2:20:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)119 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)100 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 05:56 BYM MS-V18 1.037 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 53 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-37 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL3-2, 9/5/2023 2:30:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)113 EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)99.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 14:36 09/07/23 06:20 BYM MS-V18 0.977 B173476EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 54 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-38 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL3-6, 9/5/2023 2:35:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)122 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.5 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 18:59 09/07/23 05:15 EAB MS-V17 1.085 B173490EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 55 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-39 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL4-2, 9/5/2023 2:45:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)96.3 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 18:59 09/07/23 05:37 EAB MS-V17 0.921 B173490EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 56 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-40 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN DL4-6, 9/5/2023 2:50:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Total Xylenes mg/kg 0.0025ND0.010 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)125 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.6 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 18:59 09/07/23 05:58 EAB MS-V17 1.071 B173490EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 57 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-41 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN AST1-2, 9/5/2023 3:05:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)123 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)95.9 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)102 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 18:59 09/07/23 02:22 EAB MS-V17 1.053 B173490EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 58 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 BCL Sample ID:2317020-42 Client Sample Name: Constituent Result Units Method Bias Quals MB Lab Volatile Organic Analysis (EPA Method 8260B/5035) DCN AST1-6, 9/5/2023 3:10:00PM, Mason Dossey MDLPQL Benzene mg/kg 0.00067ND0.0050 EPA-8260B 1ND 1,2-Dichloroethane mg/kg 0.00073ND0.0050 EPA-8260B 1ND Ethylbenzene mg/kg 0.00069ND0.0050 EPA-8260B 1ND Methyl t-butyl ether mg/kg 0.00056ND0.0050 EPA-8260B 1ND Naphthalene mg/kg 0.00099ND0.0050 EPA-8260B 1ND Toluene mg/kg 0.00069ND0.0050 EPA-8260B 1ND t-Amyl Methyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND t-Butyl alcohol mg/kg 0.012ND0.050 EPA-8260B 1ND Diisopropyl ether mg/kg 0.00057ND0.0050 EPA-8260B 1ND Ethyl t-butyl ether mg/kg 0.00050ND0.0050 EPA-8260B 1ND p- & m-Xylenes mg/kg 0.0015ND0.0050 EPA-8260B 1ND o-Xylene mg/kg 0.00093ND0.0050 EPA-8260B 1ND Total Purgeable Petroleum Hydrocarbons mg/kg 0.058ND0.20 Luft-GC/MS 1ND 1,2-Dichloroethane-d4 (Surrogate)%70 - 121 (LCL - UCL)124 S09EPA-8260B 1 Toluene-d8 (Surrogate)%81 - 117 (LCL - UCL)97.1 EPA-8260B 1 4-Bromofluorobenzene (Surrogate)%74 - 121 (LCL - UCL)101 EPA-8260B 1 QC Batch IDDilutionInstrumentAnalystDate/Time Run Prep DateMethodDCN Prep Method 09/06/23 18:59 09/07/23 06:20 EAB MS-V17 0.921 B173490EPA-8260B 1 EPA 5035 Soil MS DCN = Data Continuation Number The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 59 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Quality Control Report - Method Blank Analysis Constituent QC Sample ID MB Result Units Lab Quals Volatile Organic Analysis (EPA Method 8260B/5035) Run #MDLPQL QC Batch ID: B173475 Benzene B173475-BLK1 0.0050NDmg/kg 0.00067 1 1,2-Dichloroethane B173475-BLK1 0.0050NDmg/kg 0.00073 1 Ethylbenzene B173475-BLK1 0.0050NDmg/kg 0.00069 1 Methyl t-butyl ether B173475-BLK1 0.0050NDmg/kg 0.00056 1 Naphthalene B173475-BLK1 0.0050NDmg/kg 0.00099 1 Toluene B173475-BLK1 0.0050NDmg/kg 0.00069 1 Total Xylenes B173475-BLK1 0.010NDmg/kg 0.0025 1 t-Amyl Methyl ether B173475-BLK1 0.0050NDmg/kg 0.00050 1 t-Butyl alcohol B173475-BLK1 0.050NDmg/kg 0.012 1 Diisopropyl ether B173475-BLK1 0.0050NDmg/kg 0.00057 1 Ethyl t-butyl ether B173475-BLK1 0.0050NDmg/kg 0.00050 1 p- & m-Xylenes B173475-BLK1 0.0050NDmg/kg 0.0015 1 o-Xylene B173475-BLK1 0.0050NDmg/kg 0.00093 1 Total Purgeable Petroleum Hydrocarbons B173475-BLK1 0.20NDmg/kg 0.058 2 1,2-Dichloroethane-d4 (Surrogate)B173475-BLK1 115 %70 - 121 (LCL - UCL) 1 Toluene-d8 (Surrogate)B173475-BLK1 96.6 %81 - 117 (LCL - UCL) 1 4-Bromofluorobenzene (Surrogate)B173475-BLK1 99.5 %74 - 121 (LCL - UCL) 1 QC Batch ID: B173476 Benzene B173476-BLK1 0.0050NDmg/kg 0.00067 3 1,2-Dichloroethane B173476-BLK1 0.0050NDmg/kg 0.00073 3 Ethylbenzene B173476-BLK1 0.0050NDmg/kg 0.00069 3 Methyl t-butyl ether B173476-BLK1 0.0050NDmg/kg 0.00056 3 Naphthalene B173476-BLK1 0.0050NDmg/kg 0.00099 3 Toluene B173476-BLK1 0.0050NDmg/kg 0.00069 3 Total Xylenes B173476-BLK1 0.010NDmg/kg 0.0025 3 t-Amyl Methyl ether B173476-BLK1 0.0050NDmg/kg 0.00050 3 t-Butyl alcohol B173476-BLK1 0.050NDmg/kg 0.012 3 Diisopropyl ether B173476-BLK1 0.0050NDmg/kg 0.00057 3 Ethyl t-butyl ether B173476-BLK1 0.0050NDmg/kg 0.00050 3 p- & m-Xylenes B173476-BLK1 0.0050NDmg/kg 0.0015 3 o-Xylene B173476-BLK1 0.0050NDmg/kg 0.00093 3 Total Purgeable Petroleum Hydrocarbons B173476-BLK1 0.20NDmg/kg 0.058 4 1,2-Dichloroethane-d4 (Surrogate)B173476-BLK1 109 %70 - 121 (LCL - UCL) 3 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 60 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Quality Control Report - Method Blank Analysis Constituent QC Sample ID MB Result Units Lab Quals Volatile Organic Analysis (EPA Method 8260B/5035) Run #MDLPQL QC Batch ID: B173476 Toluene-d8 (Surrogate)B173476-BLK1 99.8 %81 - 117 (LCL - UCL) 3 4-Bromofluorobenzene (Surrogate)B173476-BLK1 102 %74 - 121 (LCL - UCL) 3 QC Batch ID: B173490 Benzene B173490-BLK1 0.0050NDmg/kg 0.00067 5 1,2-Dichloroethane B173490-BLK1 0.0050NDmg/kg 0.00073 5 Ethylbenzene B173490-BLK1 0.0050NDmg/kg 0.00069 5 Methyl t-butyl ether B173490-BLK1 0.0050NDmg/kg 0.00056 5 Naphthalene B173490-BLK1 0.0050NDmg/kg 0.00099 5 Toluene B173490-BLK1 0.0050NDmg/kg 0.00069 5 Total Xylenes B173490-BLK1 0.010NDmg/kg 0.0025 5 t-Amyl Methyl ether B173490-BLK1 0.0050NDmg/kg 0.00050 5 t-Butyl alcohol B173490-BLK1 0.050NDmg/kg 0.012 5 Diisopropyl ether B173490-BLK1 0.0050NDmg/kg 0.00057 5 Ethyl t-butyl ether B173490-BLK1 0.0050NDmg/kg 0.00050 5 p- & m-Xylenes B173490-BLK1 0.0050NDmg/kg 0.0015 5 o-Xylene B173490-BLK1 0.0050NDmg/kg 0.00093 5 Total Purgeable Petroleum Hydrocarbons B173490-BLK1 0.20NDmg/kg 0.058 6 1,2-Dichloroethane-d4 (Surrogate)B173490-BLK1 110 %70 - 121 (LCL - UCL) 5 Toluene-d8 (Surrogate)B173490-BLK1 96.7 %81 - 117 (LCL - UCL) 5 4-Bromofluorobenzene (Surrogate)B173490-BLK1 101 %74 - 121 (LCL - UCL) 5 Run #QC Sample ID QC Type Method Prep Date Run Analyst Instrument DilutionDate Time 1 B173475-BLK1 PB EPA-8260B EAB MS-V17 109/06/23 09/06/23 14:55 2 B173475-BLK1 PB Luft-GC/MS EAB MS-V17 109/06/23 09/06/23 14:55 3 B173476-BLK1 PB EPA-8260B BYM MS-V18 109/06/23 09/06/23 22:18 4 B173476-BLK1 PB Luft-GC/MS BYM MS-V18 109/06/23 09/06/23 22:18 5 B173490-BLK1 PB EPA-8260B EAB MS-V17 109/06/23 09/07/23 02:44 6 B173490-BLK1 PB Luft-GC/MS EAB MS-V17 109/06/23 09/07/23 02:44 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 61 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Quality Control Report - Laboratory Control Sample Constituent Control Limits PercentPercentSpike QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals Volatile Organic Analysis (EPA Method 8260B/5035) Run # Lab QC Batch ID: B173475 Benzene B173475-BS1 LCS 0.13399 0.12500 107 70 - 130mg/kg 1 Toluene B173475-BS1 LCS 0.13328 0.12500 107 70 - 130mg/kg 1 1,2-Dichloroethane-d4 (Surrogate)B173475-BS1 LCS 0.056790 0.050000 114 70 - 121mg/kg 1 Toluene-d8 (Surrogate)B173475-BS1 LCS 0.048850 0.050000 97.7 81 - 117mg/kg 1 4-Bromofluorobenzene (Surrogate)B173475-BS1 LCS 0.051420 0.050000 103 74 - 121mg/kg 1 QC Batch ID: B173476 Benzene B173476-BS1 LCS 0.12317 0.12500 98.5 70 - 130mg/kg 2 Toluene B173476-BS1 LCS 0.12615 0.12500 101 70 - 130mg/kg 2 1,2-Dichloroethane-d4 (Surrogate)B173476-BS1 LCS 0.055060 0.050000 110 70 - 121mg/kg 2 Toluene-d8 (Surrogate)B173476-BS1 LCS 0.050010 0.050000 100 81 - 117mg/kg 2 4-Bromofluorobenzene (Surrogate)B173476-BS1 LCS 0.049700 0.050000 99.4 74 - 121mg/kg 2 QC Batch ID: B173490 Benzene B173490-BS1 LCS 0.11738 0.12500 93.9 70 - 130mg/kg 3 Toluene B173490-BS1 LCS 0.11917 0.12500 95.3 70 - 130mg/kg 3 1,2-Dichloroethane-d4 (Surrogate)B173490-BS1 LCS 0.054100 0.050000 108 70 - 121mg/kg 3 Toluene-d8 (Surrogate)B173490-BS1 LCS 0.048850 0.050000 97.7 81 - 117mg/kg 3 4-Bromofluorobenzene (Surrogate)B173490-BS1 LCS 0.051590 0.050000 103 74 - 121mg/kg 3 Run #QC Sample ID QC Type Method Prep Date Run Analyst Instrument DilutionDate Time 1 B173475-BS1 LCS EPA-8260B EAB MS-V17 109/06/23 09/06/23 15:16 2 B173476-BS1 LCS EPA-8260B BYM MS-V18 109/06/23 09/06/23 22:42 3 B173490-BS1 LCS EPA-8260B EAB MS-V17 109/06/23 09/07/23 03:05 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 62 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Quality Control Report - Precision & Accuracy Constituent Sample IDType Result Result Added Units RPD Recovery RPD Recovery Quals Source Spike Percent Percent Control Limits Volatile Organic Analysis (EPA Method 8260B/5035) Source Lab R# QC Batch ID: B173475 Used client sample: Y - Description: DL1-2, 09/05/2023 09:10 MSBenzene 0.11305 70 - 130ND0.12500 90.42317020-01 mg/kg 1 MSD 0.12899 13.2 20 70 - 130ND0.12500 1032317020-01 mg/kg 2 MSToluene 0.10076 70 - 130ND0.12500 80.62317020-01 mg/kg 1 MSD 0.11920 16.8 20 70 - 130ND0.12500 95.42317020-01 mg/kg 2 MS1,2-Dichloroethane-d4 (Surrogate)0.058830 70 - 121ND0.050000 1182317020-01 mg/kg 1 MSD 0.059030 0.3 70 - 121ND0.050000 1182317020-01 mg/kg 2 MSToluene-d8 (Surrogate)0.048110 81 - 117ND0.050000 96.22317020-01 mg/kg 1 MSD 0.048160 0.1 81 - 117ND0.050000 96.32317020-01 mg/kg 2 MS4-Bromofluorobenzene (Surrogate)0.049330 74 - 121ND0.050000 98.72317020-01 mg/kg 1 MSD 0.050060 1.5 74 - 121ND0.050000 1002317020-01 mg/kg 2 QC Batch ID: B173476 Used client sample: Y - Description: GL9-2, 09/05/2023 12:45 MSBenzene 0.11152 70 - 130ND0.12500 89.22317020-21 mg/kg 3 MSD 0.10865 2.6 20 70 - 130ND0.12500 86.92317020-21 mg/kg 4 MSToluene 0.11266 70 - 130ND0.12500 90.12317020-21 mg/kg 3 MSD 0.11085 1.6 20 70 - 130ND0.12500 88.72317020-21 mg/kg 4 MS1,2-Dichloroethane-d4 (Surrogate)0.052390 70 - 121ND0.050000 1052317020-21 mg/kg 3 MSD 0.054810 4.5 70 - 121ND0.050000 1102317020-21 mg/kg 4 MSToluene-d8 (Surrogate)0.049130 81 - 117ND0.050000 98.32317020-21 mg/kg 3 MSD 0.050210 2.2 81 - 117ND0.050000 1002317020-21 mg/kg 4 MS4-Bromofluorobenzene (Surrogate)0.048830 74 - 121ND0.050000 97.72317020-21 mg/kg 3 MSD 0.050530 3.4 74 - 121ND0.050000 1012317020-21 mg/kg 4 QC Batch ID: B173490 Used client sample: Y - Description: AST1-2, 09/05/2023 15:05 MSBenzene 0.11607 70 - 130ND0.12500 92.92317020-41 mg/kg 5 MSD 0.11831 1.9 20 70 - 130ND0.12500 94.62317020-41 mg/kg 6 MSToluene 0.11849 70 - 130ND0.12500 94.82317020-41 mg/kg 5 MSD 0.12063 1.8 20 70 - 130ND0.12500 96.52317020-41 mg/kg 6 MS1,2-Dichloroethane-d4 (Surrogate)0.053570 70 - 121ND0.050000 1072317020-41 mg/kg 5 MSD 0.053970 0.7 70 - 121ND0.050000 1082317020-41 mg/kg 6 MSToluene-d8 (Surrogate)0.048360 81 - 117ND0.050000 96.72317020-41 mg/kg 5 MSD 0.048400 0.1 81 - 117ND0.050000 96.82317020-41 mg/kg 6 MS4-Bromofluorobenzene (Surrogate)0.051680 74 - 121ND0.050000 1032317020-41 mg/kg 5 MSD 0.051460 0.4 74 - 121ND0.050000 1032317020-41 mg/kg 6 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 63 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Volatile Organic Analysis (EPA Method 8260B/5035) Quality Control Report - Precision & Accuracy Run #QC Sample ID QC Type Method Prep Date Run Analyst Instrument DilutionDate Time 1 B173475-MS1 MS EPA-8260B EAB MS-V17 109/06/23 09/06/23 15:38 2 B173475-MSD1 MSD EPA-8260B EAB MS-V17 109/06/23 09/06/23 16:00 3 B173476-MS1 MS EPA-8260B BYM MS-V18 109/06/23 09/06/23 23:06 4 B173476-MSD1 MSD EPA-8260B BYM MS-V18 109/06/23 09/06/23 23:31 5 B173490-MS1 MS EPA-8260B EAB MS-V17 109/06/23 09/07/23 03:27 6 B173490-MSD1 MSD EPA-8260B EAB MS-V17 109/06/23 09/07/23 03:48 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 64 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 1 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 65 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 2 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 66 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 3 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 67 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 4 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 68 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 5 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 69 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 6 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 70 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 7 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 71 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 8 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 72 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 9 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 73 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 10 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 74 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 11 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 75 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 12 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 76 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 13 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 77 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 14 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 78 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 15 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 79 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 16 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 80 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 17 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 81 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 18 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 82 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 19 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 83 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 20 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 84 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 21 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 85 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 22 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 86 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 23 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 87 of 89Report ID: 1001454770 Subcontract Report for 2317020 PDF File Name: wo_2317020_sub_pactn.pdf Page 24 of 24 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 88 of 89Report ID: 1001454770 Kleinfelder - Laguna Hills 24411 Ridge Route, Suite 225 Laguna Hills, CA 92653 Project: Project Number: Project Manager: Costco Bakersfield 24000047 Paolo Dizon Reported:09/11/2023 9:50 Notes And Definitions MDL Method Detection Limit ND Analyte Not Detected PQL Practical Quantitation Limit S09 The surrogate recovery for this compound was not within the control limits. The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 89 of 89Report ID: 1001454770