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Home My WebLink AboutMITIGATION 2/4/1994 I' I 1 CORPORATE OFFICE: 2527 Fresno Street Fresno, CA 93721 (209) 268-7021 . Fax 268-7126 Chemistry Fax 268-0740 ·ørBW!~f~1 ANALYTICAL CHEMISTRY' ENVIRONMENTAL SERVICES GEOTECHNICAL ENGINEERING . DRILLING SERVICES CONSTRUCTION INSPECTION & MATERIALS TESTING REPORT OF LIMITED SOIL ASSESSMENT CLASS V SHALLOW INJECI10N WELL PACIFIC GAS AND ELECfRIC COMPANY SERVICE CENTER 4101 WIBLE ROAD BAKERSFIELD, CALIFORNIA Prepared for: Pacific Gas and Electric Company Kern Division 1918 "H" Street Bakersfield, California 93301 Prepared by: The Twining Laboratories, Ine. 2527 Fresno Street Fresno, California 93721 February 4, 1994 TL 393-0161-03 MODESTO 4230 Kiernan Ave. Suite 105 Modesto, CA 95356 (209) 545-1050 Fax 545-1147 VISALlA 2521 E. Valley Oaks Drive Visalia, CA 93292 (209) 625-1712 Fax 625-1714 BAKERSFielD 3701 Pegasus Drive, Suite 124 Bakersfield, CA 93308 (805) 393-5088 Fax 393-4643 -- - ø 7' I 7 .. :&:0' .~. "d ' BAKER,SFIELD d III d 11JfIflJJlUJ a1J<Yla1fYlleð. nc. FRESNO tI . SU'Cc 1696 MODESTO -:~;-:;'fISAI:IA \\ D'> U~:~_ ' LETTER OF TRANSMITTAL 2700 M street. suite 300 DATE 2/7/94 Job No. 39,3,::"0161-03 Ms. Dolores Gough - ATTN: . -. - . ~ -~-----~~- RE: Bakersfield Service Center .... : . TO Kern Countv Environmental Health Bakersfield. CA 93301 WE ARE SENDING YOU X Attached 0 Under separate cover via the following items: o Drawings o Copy of letter o Brochures o Specifications o Invoices X Copy of Report o Plans o o S~les 1 2/4/94 393-0161-03 Report Of Limited Soil Assessment Class V Shallow Injection Well THESE ARE TRANSMrn1!D as checked below: o X o o For approval 0 For your use 0 As requested 0 For review and comment Approved as subAtitted Approved as noted Returned for corrections o o o ResutJait copies for approval SUbIIit_copies for distribution For S i gneture REMARKS Enclosed please find a CODY of the reDort for the above-referenced Droject. If YOU should have any auestions reaardina the reDort. Dlease feel free to contact me at the Visalia office. COPY TO Client mGNFJ>~ Walt Plachta If enclosures are not as noted, kindly notify us at once· c 2527 Fresno Street, P.O. Box 1472 Fresno, Cal ifornia 93716 (209) 268-7021 Fax (209) 268-7126 c 2521 E. Valley Oaks Drive Visalia, California 93291 (209) 625-1712 Fax '(209) 625-1714 c 4230 Kiernan Avenue, SUite 105 Modesto, California 95356 (209) 545-1050 Fax (209) 545-1147 c 3701 pegaaua Drive, SUite 124 Bakersfield. California 93308 (805) 393-5088 Fax (805) 393-4643 'e e TL 393-0161-03 TABLE OF CONTENTS ~ 1.0 INTRODUCflON...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 2.0 PURPOSE AND SCOPE. . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . .. 1 3.0 BACKGROUND..................................... . . . . . . . .. 2 4.0 INVESTIGATION PROCEDURES ............................... 5 4.1 Field Investigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 4.1.1 Soil Boring and Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 4.2 Laboratory Analyses ...................................... 5 5.0 RESULTS ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5 5.1 Soil Profile ............................................. 5 5.2 Soil Sample Analytical Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6 6.0 FINDINGS AND CONCLUSIONS ................. ~ . . . . . . . . . . . . .. 6 7.0 RECOMMENDATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 8.0 UMITATIONS........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 9.0 CLOSING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8 10.0 REFERENCES........................................·.····· 9 TABLES Table 1 Table 2 Table 3 - Summary of Analytical Methods and Results - liquid Sample - Summary of Analytical Methods and Results - Sludge Sample - Summary of Soil Sample Analytical Results 11 e e TL 393-0161-03 TABLE OF CONTENTS (continued) DRAWINGS Drawing 1 Drawing 2 - Site Location, Map - Soil Boring Location APPENDICES Appendix A - The Twining Laboratories, Inc. Standard Operating Procedures Appendix B - Soil Boring Logs Appendix C - Laboratory Analytical Report and Chain-of-Custody Documents iii e e REPORT OF LIMITED SOIL ASSESSMENT CLASS V SHALWW INJECflON WELL PACIFIC GAS AND ELECI'RlC COMPANY SERVICE CENTER 4101 WIBLE ROAD BAKERSFIELD,CALIFORNŒA 1.0 INTRODUCTION This report presents results of a limited soil assessment in the area of a Class V shallow injection well (dry well) at the Pacific Gas and Electric Company (PG&E) Bakersfield Service Center at 4101 Wible Road, in Bakersfield, California (Drawing 1). The work was conducted by the Environmental Services and Analytical Chemistry Divisions of The Twining Laboratories, Inc. (Twining), located in Fresno, California. Twining's general work scope was described in our October 29, 1993 "limited Soil Assessment Work Plan for a Class V Shallow Injection Well" (TL 393-0161-02). Preparation of the work plan was authorized by Mr. Tom O'Brien of PG&E. The work plan was approved by the Kern County Environmental Health Services Department (KCEHSD) on November 22, 1993. 2.0 PURPOSE AND SCOPE Twining performed this site characterization to assess the presence of petroleum hydrocarbons in soil that may have resulted from the use of the Class V Shallow Injection Well associated with the vehicle wash rack. Our work scope consisted of: . Drilling, sampling, and lithologically logging a soil boring next to one of three dry wells, that received rinsate from the wash rack, to a maximum depth of approximately 25 feet below site grade (BSG); . Screening soil samples in the field for evidence of petroleum product constituents (PPCs), using a photoionization detector (PID) and submitting soil samples to the laboratory for chemical analysis; -1 ,o,,:;r~~/. '.~~~= ",':O:.:<c:-rßé~?0 >'ú ør.~_ , "/~Þ%"')" ., .. '%.~~Z1~ 1p,~r1NC' !I \~~~ .: :~'~:.~ I 37 ~;¡; fI/ : )~>Ä"'+ 0/." . ~ \oriV~':, Ij~\'¡ .'1 I Thea tel !t' ';I~,: 1 \... ~ :: I I, I ""'. 'II . , :1'===' ¡¡ ; ~ ) " . .. ., "/;1 / ,.../ ...... ..... -.-....--- - ---- ".-...-. ::: ::::.:1 :::::: :. /; .. .....!!....... .......¡'........ .... .~~.".., ·...........:;/0 , , J ,',: ;. .. ;. i9 "- ~:.-...--. ¡.h'AR'!f~ :!! RD .. 11;_ :_ _ ,','~- . ~¡ "' "1 ~--' ~ ~ -'C'é'-rt ..LL:¡ ~/ i . Tr~~~~ ~J'\" --.: - ì \'\. .' ~ \ SOURCE: UNITED STATES GEOGRAPHICAL SURVEY, GOSFORD QUADRANGLE, 1973 "AIRVI£W rn~D' I r'-;" . II ! t ~ ,. u~ fir--' ROAD ,_:~;:~ .' ~, /----. PANAMA .:¡;~ . Lt. '.~ "'\ \ .- 9 NORTH 2000 " I I APPROXIMATE SCALE IN FEET SITE LOCATION MAP PACIFIC GAS AND ELECTRIC BAKERSFIELD SERVICE CENTER 4101 WIBLE ROAD BAKERSFIELD, CALIFORNIA FILE NO,: 39301613 DRAWN BY: CMS PROJECT NO, 393-0161-03 DATE: 1-26-94 APPROVED BY: THE TWIIII"G DRAWING NO. 1 LABORATORIES. INC. fRESNO/MODESTO~SAUA/BAKERSAELD e" e Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 2 · Analyze selected soil samples for total recoverable petroleum hydrocarbons (TRPH); · Containerize soil cuttings and decontamination rinsate generated during the field work in sealed drums pending results of the laboratory analyses; and · Prepare this technical report presenting investigative procedures, findings, an evaluation of the findings, conclusions, and recommendations. 3.0 BACKGROUND The site is in the southeast quarter of Section 14, Township 30 South, Range 27 East, Mount Diablo Baseline and Meridian. The site is currently occupied by the PG&E Bakersfield Service Center. According to the United States Department of Interior, Bureau of Reclamation (1993), groundwater in the area of the site was approximately 190 feet BSG in the spring, 1993 and flows generally to the east (U.S. Bureau of Reclamation, 1993). A vehicle wash rack is located on the eastern edge of the vehicle maintenance building (Drawing 2). Prior to 1993, rinsate from the wash rack was collected in a drain and then piped through an oil/water separator into three dry wells. The dry wells are reportedly 10 to 15 feet deep. In 1993, PG&E installed a closed rinseate recovery system that collects rinseate for recycling and piping to the dry wells was disconnected. In April 1993, The KCEHSD requested that PG&E perform a preliminary investigation of the former rinseate disposal system with the goal of closure of the system according to United States Environmental Protection Agency (U.S. EP A) guidelines. Twining conducted a site reconnaissance on August 5, 1993 and samples of the liquid and sludge present in the oil-water separator were collected in the prese~ce of a KCEHSD representative. The water sample appeared to have a slight petroleum odor and visible sheen. The . samples were chemically analyzed for constituents specified by Mr. Terry Gray of the KCEHSD. The analytical methods and results are summarized in Tables 1 and 2. ' SOIL BORING LOCATION. PACIFIC GAS AND ELECTRIC BAKERSFIELD SERVICE CENTER 4101 WIBLE ROAD BAKERSFIELD, CALIFORNIA VEHICLE MAINTENANCE GARAGE FILE NO.: 39301613 DRAWN BY: CM8 PROJECT NO. :~q~-OI Ii 1-0~ WlHIffTE LANE DATE: 1-26-94 APPROVED BY: vt" DRAWING NO. ? OIL/WATER SEPARATOR COLLECTION 6 DRAIN DIVERTER o DRY WELL .. ~ NORTH 410 APPROXIMATE SCALE IN FEET . BORING LOCATION THE TW'II'II' LABORATORIES. INC. ~Q~<:",n lun","C:::Tn ^~<:'116/RA""O~~I"1 n e - Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 3 Table 1 Summmy or Analytical Methods and Results Liquid Sample I::::::::::::,,:,:::::,:::IIII:::::::,:::::::::::::,:J:1::,li:JIB,:,t::,,: ::J:.:::'II::,:,:::,:;,:,,:,t::::::::::::::::::::::::::::::_,::::::::::,:"::::::,,~.-:::,:.'::::,,,:::,_:,:,,::,::,:::,::::,,:1 Volatile Haloc:arbons 601 ug/L ND 0.5-3.0 Volatile Aromatics 602 ug/L Toluene 1.7 0.5 Xylenes 0.6 0.5 TPH-G GC/FID ug/L ND 40 Methyt ethyt Ketone SOlS ug/L ND 0.5 Methyt isobutyl Ketone SOlS ug/L ND 0.5 TPH-D GCFID ug/L 1040 SO TRPH 418.1 mg/L 125 10 ND = None detected MDL = Method detection limit. Note: Constituents not listed were none detected e - I 'J Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 4 Table 2 Summary of Analytical Methods and Results Slud~ Sam-ple ........................................... ............................................ ........................................... ....................................................................................... ::::BP.Á~) .......................................... . ................. ...................... ..... ............................... .............................. . ............................... .............................. . .:-;.: ............................... ::~~j;~¡¡¡;¡¡¡¡:r ............. .... ............. .... · . . . . . . . . . . .. . - . . ............. .... ............. .... ............. ... · . . . . . . . . . . .. ... · . . . . . . . . . . . . . . . .............. ... ............. ... .............. ... ..................... .................... ........... ....... ............................. ............................. ',','..,',',',-::,',',',','.'.'.',',',',' ::::r::::::~:::::::::::::::::::::::: .............................. ............................. ................ .. ....... :-:-:.:.:.:.:.:.:.:.:.:.:.:.:-:.:.:.:.:.:.'.:.:-:-:.:.;-;.;.:-:-:.:.;.:.:.;.;.:.:.:.:.;.:.:.:.:.:.:.;.:.;.;.:.:.:-:.:-:':-:':':'. Poly-chlorinated Biphenyl (PCB) sœo mg/kg NO 1.0 Antimony 7041 mg/L O.oœ O.OOS Arsenic 7060 mg/L 0.054 0.002 Barium 6010 mg/L 1.27 O.OOS Beryllium 6010 mg/L 0.002 0.001 Cadmium 6010 mg/L 0.03 0.01 Chromium 6010 mg/L 0.16 0.01 Cobalt 6010 mg/L 0.06 O.OS Copper 6010 mg/L 0.37 O.OS Lead 7420 mg/L 0.33 O.OS Mercury 7470 mg/L NO 0.0002 Molybdenum 6010 mg/L NO 0.2 Nickel 6010 mg/L 0.14 O.OS Selenium 7741 mg/l 0.009 0.003 Silver 7760 mg,IL NO 0.02 Thallium 7841 mg,IL NO O.OOS Vanadium 6010 mg,IL 0.23 O.OS Zinc 6010 mg/L 1.32 O.OS NO None detected MDL Method detection limit Based on analytical results of the liquid and sludge samples, the KCEHSD requested in a letter dated October 1, 1993, that PG&E submit a site characterization work plan for assessing the soil surrounding the shallow injection well system. - - Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 PageS Twining prepared the work plan (Twining, 1993b) and proposed drilling one soil boring near one of the dry wells: The KCEHSD approved the work plan with the condition that the samples were to be analyzed for TRPH instead of TPH-D and with the understanding that additional work may be required. The following sections present Twining's investigation procedures, results, and our conclusions and recommendations. 4.0 INVESTIGATION PROCEDURES The work was intended to be exploratory in nature and was not designed to be a comprehensive site assessment. Twining's field and laboratory activities were performed in general accordance with our Standard Operating Procedures (SOPs). Our SOPs are presented in Appendix A 4.1 Field Investi1:ation: 4.1.1 Soil Borine and Samplin&: Twining drilled and sampled one boring (B-1) approximately three feet east of the eastern most dry well (Drawing 2). The location was approved in the field by the KCEHD on-site representative. Soil boring B-1 was drilled to a depth of approximately 25 feet BSG. Soil samples were collected at 5-foot intervals, bevnning at a depth of 5 feet BSG. Soil samples were examined for visual evidence of petroleum hydrocarbons, and screened for evidence of volatile organic compounds (VOCS), using aPID. Screening results were recorded on the boring logs (Appendix B). 4.2 Laboratory Analyses: Soil samples were analyzed by Twining for TRPH using U.S. EPA Method 418.1 (U.S. EPA, 1984). Twining is certified by the California Department of Health Services to perform these analyses (Certificate No. 1371). 5.0 RESULTS 5.1 Soil Profile: As shown on the boring log in Appendix B, soils encountered in the boring consisted of silt-sand mixtures, silt-clay mixtures, and well-graded sand to the maximum depth investigated, 25 feet. Groundwater was not encountered in the boring. - - Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 6 5.2 Soil Samnle Analytical Results: Soil sample analytical results are snmmarized on Table 2. The laboratory analytical report and chain-of-custody documents are presented in Appendix C. Table 3 Summ8IY of Soil Smnple Anatytical Results Borini B-1. December 13. 1993 B-1 45 - 5.0 ND B-1 9.5 - 10.0 ND B-1 14.5 - 15.0 ND B-2 195 - 20.0 140 B-2 245 - 25,0 ND DLR 10 mg,Ikg '= milligrams per kilogram TRPH = total recoverable petroleum bydroc:arbons ND = none detected a~ detection limit DLR = detection limit for reporting purposes 6.0 FINDINGS AND CONCLUSIONS On the basis of the above results, soils in the vicinity of the dry wells have detectable concentrations of PPCS. Only one sample contained measurable TRPH, however, and the analytical results for the sample collected 5 feet below it was none detected. On the basis of our exploratory field investigation, and the laboratory analytical results, Twining concludes: . Soils in the vicinity of the Class V shallow injection well have been impacted by PPC's. However, because the bottom sample (24.5 feet BSG) was none detected and 'groundwater is reported to be approximately 190 feet BSG, the petroleum hydrocarbons detected do not appear to be a threat to groundwater quality. e e· Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 7 7.0 RECOMMENDATIONS On the basis of the findings and conclusions of this invesûgaûon: . Twining recommends this report be subnµtted to the KCEHSD. 8.0 LIMITATIONS Twining performed this field invesûgaûon and prepared this report in accordance with the standards of professional practice in Kern County at the time this work was performed. This warranty is in lieu of all other warranûes, either expressed or implied. Condiûons of interest may exist at the site that cannot be identified by visual observaûon alone. Where subsurface exploratory work was performed, our professional opinions are based in part on interpretaûon of data from discrete sampling locaûons that may not represent actual condiûons at locaûons not sampled. H condiûons of interest have not been identified during performance of the work, such a finding should not be construed as a guarantee that such condiûons do not exist at the site. Soil boring locaûons and depths, and the soil sample analysis plan were approved by the KCEHSD. This report was prepared with the understanding that it is the responsibility of the client to transmit this report, in its entirety, to the appropriate regulatory agencies, as required, so that necessary actions can be taken. This work was performed for the sole use of Twining's client. Any reliance on this report by a third party is at such party's risk. e e Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 8 9.0 CLOSING Twining appreciates the opportunity to be of service to PG&E on this project. H you have any questions regarding the information contained herein, please contact our Fresno office. Sincerely, THE lWINING LABORATORIES, INC. Environmental Services Division ~~ Project Manager I' ,/) ,I !(~ ,i ~ ~~aÏI ~~gers, R~G Division Manager TEB: WP:CLR:lr e e Pacific Gas and Electric Company February 4, 1994 TL 393-0161-03 Page 9 10.0 REFERENCES United States Environmental Protection Agency, 1984, Methods for Chemical Analysis of Water and Wastewater. EPA - 600/4-84-017. United States Department of the Interior, Mid-Pacific Region 1992 Water Su,pply Report September, 1993. . e e TL 393-0161-03 APPENDIX A The Twinine Laboratories. Ine. Standard Operatinr Procedures, This appendix contains the standard operating procedures (SOPs) used by Twining in performing the investigative procedures. Twining observes these procedures in order to obtain consistent, reliable data. The procedures used for this investigation included the following. · Drilling and Soil Sampling · Equipment Decontamination · Sample Handling and Chain-of-Glstody · Laboratory QA/QC · Using Photoionization Detector(PID) and/or Dragere Tubes · Decontamination Rinsate, Monitoring Well Purge Water, and Soil Cuttings Disposal · Performing Head Space Analysis A-l Standard Operatine Procedures for Drilline and Soil Sampline: Subsurface assessment, permits will be filed with the appropriate regulatory agencies prior to conducting field operations. Field activities will be performed under the direction of a California-registered geologist or -certified professional engineer. Soil borings will be drilled using an appropriate method. The method selected will depend upon project objectives and subsurface conditions. Drilling and sampling equipment will be thoroughly cleaned before, during and after each use. Oeaning procedures are described in Twining's "Standard Operating Procedures for Equipment Decontamination". Soil samples will be collected using a continuous-coring device, by driving a split-spoon sampler, or by grabbing samples from the drilling cutting returns. The sampler or coring device will be lined with brass, stainless steel, or acrylic tubes, in which samples may be retained for subsequent chemical analyses. Soil samples will be examined for the purpose of preparing lithologic logs, and screened for evidence of petroleum product by observing the soil for unusual odor or stains. Generally, soil samples selected for analyses typically represent the greatest potential for containing petroleum product constituents based on the field screening. In routine i e e TL 393-0161-03 circumstances, the bottom two samples from each boring will always be submitted for analysis, and the sample from just above first-encountered groundwater. Samples intended for chemical analyses will be sealed with Teflon tape and plastic end caps, labeled, placed on ice, and delivered to a laboratory, along with chain-of-custody documentation. To collect samples using the split-spoon sampler, the sampler is initially lowered to the bottom of the soil bOring and driven 6 inches into undisturbed soil. It is then driven 12 inches deeper by repeatedly dropping a 140-pound weight from a height of 30 inches. The number of blows required to advance the sampler 12 inches is recorded on the boring logs as "blows per foot". This information is used in estimating soil density. Soil descriptions, including consistency, moisture, particle size, and color, and other relevant observations will be recorded on soil boring logs. Soils will be classified in general accordance with the Unified Soil Oassification System (uses) or the American Society for Testing and Materials (ASTM) standards. A sample soil boring log is presented as "Attachment A". The soil borings may be completed as ,groundwater monitoring wells, or abandoned by grouting with a 6-sack cement slurry containing 3 to 5 percent bentonite or by backfi11ing with clean soil. Abandonment procedures will depend upon the boring depth, depth to groundwater, project objectives, and regulatory requirements. For borings greater than 15 feet deep, grout will be emplaced through the hollow augers which will extend to within 15 feet of the bottom of the boring. H required by the local regulatory agency, grout will be emplaced by pumping through a tremie pipe which extends to within 15 feet of the bottom of the boring. The tremie pipe or augers are withdrawn from the boring in 5-foot increments as the boring fills with grout. SOPs for groundwater monitoring well installation are described in a separate document. Soil cuttings generated during drilling will be containerized in Department of Transportation-approved sealed drums, or placed on and covered with plastic sheeting, and stored on site in an area inaccessible to the general public. Typically, the stockpiled soil is characterized by collecting and analyzing composite samples from the stockpile. Twining can recommend an appropriate method for disposition of the cuttings based, on the analytical results. Disposal will be the responsibility of the client. A-2 Standard Operatin.: Procedures for Eq}lÏ,pment Decontamination: Proper decontamination procedures reduce the potential for: (1) cross-contamination among . sample locations; and (2) introduction of contamina-tion from outside sources. e e TL 393-0161-03 . Before, during, and following drilling operations, drilling equipment will be thoroughly cleaned using a high pressure hot water (steam) washer. Well casing, screen, end caps, and centralizers will also be cleaned using the steam washer. Steam cleaning condensate will be containerized for later disposal. Generally, disposal will be the client's responsibility. Sampling equipment and any tools, measuring devices, or other equipment which will contact soil, groundwater, or any media being assessed will be washed in a non-phosphate soap and water solution, and rinsed in de-ionized water before each use. The type of soap used will depend upon project requirements. 'A-3 Standard Operatine Procedures for Sample Handline and Cbain-of-Custody: Records will be developed for samples which include: sampling date, sample type, location, job number, name of sampling personne~ and method of preservation. Each sample container will be labelled immediately following collection. Chain-of-custody protoco4 as described in United States Environmental Protection Agency, 1986, Test Methods for Evaluatini Solid Waste. SW-846, 3rd ed., will be followed. Samples will be maintained at approximately 4°C. Upon arrival at the laboratory, the samples will be preserved for analysis as appropriate. . Samples may be delivered to Twining's chemistry laboratory in Fresno, California. The Twining representative in charge of the field work will transport or direct the transportation of the samples and custody forms to the laboratory, where the samples will be transferred to the sample control department A receiving clerk, or an authorized analyst, will sign the custody forms, present a duplicate copy to the Twining representative, and transfer the samples to a laboratory analyst The laboratory director will retain possession of the custody forms during analyses of the samples. A sample chain-of-custody form is presented as "Attachment A". The laboratory director's responsibilities include monitoring the sample integrity within the laboratory. This involves assigning each sample a laboratory number and maintaining cross- reference between the sample's field and laboratory identifications. The analysts' responsibilities include maintainine accurate records of the samples analyzed along with the analytical data produced. This involves labelling chromatograms and maintaining the laboratory numbers on subsamples taken from the submitted samples, labelling glassware used in the analyses, and properly labelling sample extract containers with each sample's laboratory number. e e TL 393-0161-03 Following analyses, the samples are transferred to a limited-access storage room. Chain-of- custody forms, chromatograms, and other pertinent informaûon are filed for futùre reference. Splits of samples analyzed are kept for 30 days. Samples containing hazardous concentraûons will be returned to the client for disposal. A-4 Standard Qperatine Procedures for Laboratory Quality Assurance/Quality Control: These laboratory QA/OC procedures were developed to reduce outside interferences during analyses of samples. The laboratory director is responsible for creating and maintaining the program. General QA/QC procedures follow: · Analytical instruments are serviced on a regular basis to assure accurate calibration; · Organic-free water is monitored daily for quality; · Gas chromatographs are calibrated daily; · Method blanks are run to check whether the glassware and reagents are free of interference from chemicals that would invalidate the analyses; · Standards are prepared using the applicable reference materials; · Matrix spikes are analyzed in duplicate to validate the accuracy and precision of the method; and · During groundwater sampling, a travel blank sample consisting of organic-free water is prepared and containerized in the laboratory, transported to the site, and handled and transported in the same manner as the groundwater samples. A-5 Standard Queratine Procedures for Usine PhotoionizatioD DetectorlPID) and/or Draeer4Þ Tubes The PID will be calibrated in accordance with the manufacture's recommendations prior to use in the field. Upon arrival at the project site, the PID will be used to monitor background concentrations of organic vapors in the atmosphere at the site. The background concentrations will be measured in a ,location upwind and removed as poSsible from sources of organic vapors on the site. When background concentraûons of organic vapors register as "0.0" on the PID, subsequent readings of "0.0" registered from samples tested in the field will be recorded as "00" (not detected). When background concentrations of organic vapors register at some quantity above "0.0", subsequent re~ding,4\ registered from samples tested in the field at or below this value will be recorded as "B/G" (background). I I . e e TL 393-0161-03 The Drager4Þ tubes used will be consistent with the type of analyte which is suspected as being present on the project site (i.e. for gasoline product use the benzene tube, for diesel product use the petrol-hydrocarbon tube, etc.). Prior to use the tubes will be examined to insure the shelf life expiration date has not expired and the tube has not been opened or damaged Tubes will only be use for one test The Dragere Gas Detector Pump will be used with Drager4Þ tubes to insure accuracy. Prior to use the pump will be examined to insure it is in proper operating condition. The tube will be opened and inserted into the pump just prior to use. The pump will be stroked the number of times required by the specific tube in use (i.e. 2 strokes for the petrol-hydrocarbon tube). After each stroke the pump will be allowed to open to the full extent of the arrestor chain (10 to 20 seconds). H the analyte is present in the sample, the material within the tube will discolor. The extent of the discolored material corresponds to the concentration of the analyte present Re.aðing... from the tube will be recorded based upon the amount of discolored material read from the calibrated markings on the tube. In the event the discoloration should extend beyond one marking but not to the next, this will be recorded as "greater than (> )" the lower value. (i.e. if the discoloration extends beyond 300 ppm but does not reach 500 ppm, this would be recorded as >300 ppm). The exception to this is when the discoloration reads less than the lowest value, this would be recorded as "less than «)" the lowest value on the tube. After use tubes will be disposed of as hazardous material because the contents are corrosive and the broken glass tip is a cut hazard. A-6 Standard Operatin& Procedures for Decontamination Rinsate.. Monitorin& Well Purre Water. and Soil Cuttinp Disposal The soil cuttings generated by drilling operations will be retained on site, and either covered by plastic sheeting or containerized in Department of Transportation-approved drums. The drilling equipment will be steam-cleaned on racks, and the rinsate will be retained in a steel trough, and then transferred to drums. Water purged from monitoring wells will be containerized in drums if contamination is known or suspected. Drums containing soil, rlnsate, and purged water will be sealed and temporarily stored on site at a location remote to the public. Each drum will be labelled to identify its contents. Disposal of these wastes will be the responsibility of the client The client will be informed that the wastes must be disposed in accordance with applicable Federal, State, and local regulations. e e TL 393-0161-03 A-7 Standard Operatine Procedures for Peñonninr Head Space Analysis Head space analysis will be performed using a photoionization detector (PID) or a drager tube. The soil sample will be placed in a sealed glass container or plastic bag, agitated, and placed in a warm atmosphere. After approximately 15 minutes, which is generally sufficient for some of the volatiles to escape from the soil, the PID probe or tip of the drager tube will be inserted into the container and the gas will be sampled. The highest concentration of organic vapors recorded by the PID or the drager tube reading will be recorded on the boring log. TL 393-0161-03 e APPENDIX B Soil Borine Loe e . TIll! . .'fJ!'l~f LOG OF BORING SOIL BORING B-1 Profect: PG&:E Service Center Location: Bakersfield, California Logged By: K. Rank Drilled By: J. Rodriquez Auger Type: 6-7/8-inch Hollow-stem Depth to Groundwater: Not encountered o 5 10 15 20 25 30 Profect Number: 393-0t61-02 Date Started: 2/13/93 Date Completed: 12/13/93 Drill Type: CME-75 Elevation: 370 feet SOIL SYNBOLS SAMPLER SYMBOLS AND nELD TEST DATA BIoWl per foot SoU Description uses Remarks ............. ......................................................... ..... .. St.4 SAND, Silty; moist, loose, fine-grained sand (75%), (silt,25%), yellowish-gray PID (ppm) = 0.0 ............. ......................................................... SW SAND, Well-Graded; moist loose, fine- to medium-grained, yellowish- orange PID= 0.3 3/6 3/6 5/6 8 ............. ......................................................... CL-t.4L SILT, Clayey; moist, firm, silt (90%), clay (10%), nonplastic, yellowish-orange PID = 0.4 3/6 3/6 3/6 6 ............. ......................................................... St.4 SAND, Silty; moist, medium dense, fine-grained, sand (90%), silt (10%), yellowish-orange with orange oxide staining silty clay at 19.0 - 19.3 feet 19 PID = 0.3 4/6 616 13/6 ............. ......................................................... SW-St.4 SAND, Well-Graded with Silt; moist, fine- to medium-grained, sand (98%), silt (2%), yellowish-orange :t::t::t::t:: :t:t :t:t . :c:c:c :c :0::'::0 716 :~:~:¡:+: 716 14/6 PID = 0.4 21 Bottom of Boring Notes: Located approximately 3 feet east of eastern dry well. KEY TO SYMBOLS symbol Description strata Symbols -"." . ...... . ...... . ...... . ...... . ...... . ...... . ...... . ...... . ...... . ...... . ...... . [ili]J" " " " . . . ............ ............ ............ ............ ............ ............ rnRa silty sand Well-graded sand Clayey low plasticity silt Well graded sand with silt soil Samplers [] Split-spoon sampler (pushed) ~ Split-spoon sampler Notes: 1. These logs are subject to the limitations, conclusions, and recommendations in this report. 2. Results of field test conducted on samples recovered are reported on the logs. 3. Descriptions of material encountered during drilling are based on Unified soil Classification System. 4. Abbreviations used in the descriptions and remarks of these logs are as follows: CME = Central Mine Equipment ft = foot PID = photoionization detector ppm = parts per million USCS = Unified Soil Classification System Note: Approximate elevation in feet above mean sea level. Boring was backfilled with Enviroplug bentonite chips per Kern County Environmental Health Department representative. Upper four feet was backfilled with clean Lone Star No. 3 sand and capped with four inches of asphaltic cold patch. e e TL 393-0161-03 APPENDIX C Laboratory Analytical Report and Chain-of-Custody Documents _.THE _ ,., !W1~~~~ ANALYTICAL CHEMISTRY' ENVIRONMENTAL SERVICES GEOTECHNICAL ENGINEERING . DRILLING SERVICES CONSTRUCTION INSPECTION & MATERIALS TESTING REPORT DATE LABORATORY ID : December 22, 1993 : 693-6929.1-5 INVOICE #12515 PAGE 1 of 1 DATE SAMPLED DATE RECEIVED 12-13-93 at As Listed by K. Rank : 12-14-93 at 0900 from K. Rank ATTENTION CLIENT : Tom O'Brien Pacific Gas & Electric 1918 "H" Street Bakersfield, CA 93301 PROJECT : PG&E- Service Center 4101 Wible Road Bakersfield, CA 393-0161-02 TL# ANALYZED BY REVIEWED BY M. Langroodi R. Stafford DATE PREPARED DATE ANALYZED : 12-16-93 12-20-93 SAMPLE TYPE : Soil CONSTITUENT . Total Recoverable Petroleum Hydrocarbons (TRPH) . , LAB CLIENT ID# SAMPLE ID RESULTS UNITS DLR METHOD .1 B-5, 4.5' - 5.0' @ 1345 ND mg/kg 10 418.1 Mod. .2 B-5, 9.5' - 10.0' @ 1350 ND mg/kg 10 418.1 Mod. .3 B-5, 14.5' - 15.0' @ 1400 ND mg/kg 10 418.1 Mod. .4 B-5, 19.5' - 20.0' @ 1410 140 mg/kg 10 418.1 Mod. .5 B-5, 24.5' - 25.0' @ 1415 ND mg/kg 10 418.1 Mod. CALIFORNIA DEPARTMENT OF HEALTH SERVICES CERTIFICATE NO. 1371 mq/kg: milligrams per kilogram (parts per million) ND: None Detected DLR: Detection Limit for Reporting purposes mrl /~~ ~~jl Robert W. Stafford Organic Supervisor .~~I.:.- Debra K. Lehm . QA Manager Rev. --1-- 8/93 (FORMl.ORG) CORPORATE OFFICE: 2527 Fresno Street Fresno, CA 93721 (:;1091 268-7021 . Fax 268-71:;16 MOOESTO 4230 Kiernan ~e. Suite 105 Modesto, CA 95356 (209) 545·1050 VISALlA 2521 E. Valley Oaks Drive Visalia, CA 93292 (209) 625-1712 BAKERSFIELD 3701 Pegasus Drive, Suite 124 Bakersfield. CA 93308 (805) 393-5088 ?~f;];,;j/! è:;,[i~JrT::;,;;~:'~~~r~~ .". ,THE TWINING LABORATORIES, INC. ,'. ','; 2527 Fresno:Str~èt, Fresno. CA 93721 ' , ';,',; ", (209)':268:-7021 " " ',' , , ", d.èhai,i."Of-Custodyan~·(Ar,ålysis Re~uest Record ,;~~W~~OPles To:'E~~'/ ~ ;. ; ;: ,~.. ',.' , "... ",: .~;'. ',;' ,...;. Dat~erlJ IÞr 1:3 .' /993 Page 'J of' I ) , .. Report To: Client Name AddreSs ...;.... '.": ." ~' SD . - - '" ", . ",.,' . ..,~:: - : , Contact ame ~hone 9()ntract/PO# Sampler Name . . :-'$"111 To: '.,':".. ':,"" ~::~ . , : ";~:,:. ",:.¡ 3J;t>1' .' ',,;:{-ý¡~> .' ~>, ~"- :;,' '-. r ;~..:-. .... :J <,f. ._ > ~~G-., "':~'< Expected Turnaround:. . ~~';':;; ',;, ~~,~,' , ,'_ :·?C1(~OU~INE 0 RLlSH.y.~~^~~li !¡;:t:rRUSH:ÁÈ.PÒÂJ;~·, Î-O:-#' '8"7 ~-' ,<':':::':;;-, Additional FeesApply::),;:~~:",;. h;~.:,:¡/;,,:.' ' , : j}e)ir;Pr&a-~jJ~W~~1:Y~Òäte: ~iè,:~~\~: ··~:;!R.}'f~~~:,,:.~If;;;. D;f;fil;:~)';') _:.·s~yt~~ . ~ :._,.,," . . '. , 'i::E~Ch hazardous' sam pie . sùbmitted ,.:..for analysis will be charged a hazard- :'·.oiJ.swasfe disposal fee. Clients that " ': retrieve hazardous sampleswitl1in 30 , . days of the arialylic eport date will .:+~~~/efunded~ny . posal fees: :)~elinquis ~ignatu .};¡nte 90mpany ,6ate/Time J . For Water saMJì~#p'ease , -.,'" . ;-. .,; , - ",',,~.- . check one'oUHe.@lowing: g ~~;~~~~~j~e~~;~ .' OGround W~!~iX~ells) o Surface W~!é,~(~;iyers, lakes) DeliverèdBf· InâtÙrei" ' ~~:;:~v ...~ ~ te!J::\ÌþE!,L , ~;~..' . ::; .:~.~>.'.:.:,~~.' :: : -~. .::-. '.~' Y~.L~: :h", ~-:;:'~~~::_~,~.~~~~~~"