The URL can be used to link to this page

Home My WebLink AboutBUSINESS PLAN 1/30/1990APPENDIX C Fresno Modesto Visalia Bakersfield Geotechnicaland Environmental Consultants , Engineering and Chemical Laboratories REPORT DATE : January 30, 1990 EXAMINATION NO.: 688-4917.1-17 PROJECT MGR: Bruce Blythe CLIENT : Isaacs & Bailey 3939 Bernard Street, Suite #6 Bakersfeild, CA 94406 PROJECT : Valley Olds TL~ 988-099-02 DATE RECEIVED: 10-30-88 In accordance with your instructions, the samples submitted were analyzed for the components specified. Results are enclosed on the following pages. If you have any questions concerning the analysis or results, please contact us. Thank you for letting us serve you. LJ:mrd lc:herewith THE TWINING LABORATORIES, INC. L~aY~g~e~istry Division [] 2527 Fresno Street · P.O. Box 1472 Fresno, California 93716 · (209) 268-7021 [] 9401 West Goshen Avenue Visalia, California 93291 · (209)651-2190 ~ f405 Granite Lane. Suite 1 Q 3701 Pegasus Drive, Suite 124 Modesto. California 95351 - (209) 523-0994 Bakersfield, California 93308 · (805) 393-5088 REPORT DATE : January 30, 1990 EXAMINATION NO.: 688-4917.1-17 CLIENT : Isaacs & Bailey PROJECT MGR: B=uce Blythe page 1 of 3 PROJECT : Valley 01ds 988-099-02 DATE RECEIVED: 10-30-88 DATE ANALYZED: 12-27-89 ANALYST : D. Deasy, D. Lehman SAMPLE TYPE CONSTITUENT : Soil : Oil & Grease METHOD: EPA 4].3.1 EXAM NUMBER SAMPLE RESULT MDL IDENTIFICATION (mg/kg) (mg/kg) 688-4917.1 688-4917.2 688-4917.3 688-4917.4 688-4917.5 688-4917.6 688-4917.7 688-4917.8 688-4917.9 688-4917.10 688-4917.11 688-4917.12 688-4917.15 688-4917.16 688-4917.17 B-i, 5.8 - 6.8' B-I, 11.5 - 12.5' B-i, 17.3 - 18.3 B-I, 23.0 - 24.0 B-2, 5.0 - 6.0 B-2, 10.0 - 11.0 B-2, 15.0 - 16.0 B-2, 20.0 - 21.0 B-2, 25.0 - 26.0 B-3, 5.0 - 6.0 B-3, 10.0 - 11.0 B-3, 15.0 - 16.0 B-4, 5.0 - 6.0 B-4, 10.0 - 11.0 B-4, 15.0 - 16.0 74000 5 15 5 10 5 10 5 35 5 10 5 5 5 5O 5 ND 5 13000 5 33000 5 30 5 35 5 40 5 45 5 NOTES: mg/kg: Milligram per Kilogram ND: None Detected MDL: Method Detection Limit Fresno Moclesto Visatia 8akersfielO REPORT DATE : January 30, 1990 EXAMINATION NO.: 688-4917.6 CLIENT Isaacs & Bailey PROJECT MGR: Bruce Blythe page 2 of 3 PROJECT : Valley Olds 988-099-02 DATE RECEIVED: 10-30-88 DATE ANALYZED: 12-27-89 ANALYST : D. Deasy, D. Lehman SAMPLE TYPE : Soil CLIENT IDENTIFICATION: S-6 RESULT UNITS MDL METHOD CAM METALS Antimony(Sb), total Arsenic(As), total Barium(Ba), total Beryllium(Be), total Cadmium(Cd), total Chromium(Ct), total Cobalt(Co), total Copper(Cu), total Lead(Pb), total Mercur¥(Hg), total Molybdenum(Mo), total Nickel(Ni), total Selenium(Se), total Silver(Ag), total Thallium(T1), total Vanadium(V), total Zinc(Zn), total ND 2.2 58 0.3 ND 6 ND 13 7 0.6 ND ND ND ND 4 18 33 mg/kg 100 7040 mg/kg 0.5 7061 mg/kg 0.5 6010 mg/kg 0.1 7091 mg/kg I 6010 mg/kg I 6010 mg/kg 5 6010 mg/kg 5 6010 mg/kg 0.5 7421 mg/kg 0.1 7470 mg/kg 20 7481 mg/kg 5 6010 mg/kg 0.5 7741 mg/kg 3 7760 mg/kg i 7841 mg/kg 5 6010 mg/kg 2 6010 NOTES: mg/kg: Milligram per Kilogram MDL: Method Detection Limit ND : None Detected Fresno Modesto Visalia Bakersfield REPORT DATE : January 30, 1990 EXAMINATION NO.: 688-4917 CLIENT Isaacs & Bailey PROJECT : Valley Olds TL# 988-099-02 DATE RECEIVED: 10-30-88 DATE ANALYZED: 12-27-89 ANALYST SAMPLE TYPE CONSTITUENT METHOD: 7421 EXAM NUMBER : D. Deasy : Soil : Lead (Pb) SAMPLE IDENTIFICATION PROJECT MGR: Bruce Blythe page 3 of 3 RESULT MDL (mg/kg) (mg/kg) 688-4917.5 S-5 3 0.5 688-4917.7 S-7 3 0.5 688-4917.8 S-8 4 0.5 688-4917.9 S-9 4 0.5 NOTES: mg/kg: Milligram per Kilogram as raceived MDL: Method Detection Limit Fresno Modesto Visalia Bakersfield C#£MICAt AI~A~ RATORIES. Inc. J. J. EGLIN, REG. CHEM. ENGIL 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 McNabb Construction 7808 Olcott Ave. Bakersfield, CA 93308 ATTN: Bryan McNabb Date Reported: Date Received: Laboratory No.: 02/17/88 02/09/88 1086-5 TOTAL EXTRACT CONTAMINANTS BY ACID DIGESTION Sample Description: Total Metals~ mg/kg Sample Results Method Valley Olds, 2/9/88, North Waste Oil Tank @ 2' sampled by; David Rittenhouse Title 22 Reference 7040 7061 1 7080 1 210.1 2 7130 1 7190 1 291.1 2 220.1 2 7421 1 7471 1 246.1 2 7520 1 7741 1 7760 1 279.1 2 286.1 2 289.1 2 9010 420.1 2 9030 1 340.2 2 7196 1 9040 1 1010 1 8080 1 9020 1 Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead 39.8 Mercury Molybdenum Nickel Selenium Silver Thallium Vanadium Zinc Cyanides Phenols Sulfides Fluorides Hexavalent Chromium Oil & Grease 15326. pH Pensky-Martens Flash Point PCB's TOX, ug/g (-) 20. TTLC, mg/kg 500. 500. 10000. 75. 100. 2500. 8000. 2500. 1000. 20. 3500. 2000. 100. 500. 700. 2400. 5000. Comment: Ail contaminants reported abovm are in mg/kg (unless otherwise stated) on an as received (wet) sample basis. Results reported represent totals (TTLC) as sample subjected to appropriate techniques to determine total levels. (-) refers to "less than". (1) "Test Methods for Evaluating Solid Wastes", SW 846, July, 1982. (2) "Methods for Chemical Analysis of Water and Wastes", E?A-600, 14-79-020 B C LABORATORIES, INC. BY J. J. Eglin ~£A41~,A~ AAfAZ Y$15 - BORATORIES, I n(c. J. J. EGLIN, REG. CHEM. ENGI~: 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 McNabb Construction 7808 Olcott Ave. Bakersfield, CA 93308 ATTN: Bryan McNabb Date Reported: Date Received: Laboratory No.: 02/17/88 02/09/88 1086-6 TOTAL EXTRACT CONTAMINANTS BY ACID DIGESTION Sample Description: Valley Olds, 2/9/88, North Waste Oil Tank @ 6' sampled by; David Rittenhouse Title 22 Total Metals~ m~/k~ Sample Results Method Reference TTLC, mg/kg Antimony 7040 1 Arsenic 7061 1 Barium 7080 Beryllium 210.1 2 Cadmium 7130 1 Chromium 7190 1 Cobalt 291.1 2 Copper 220.1 2 Lead 50.4 7421 1 Mercury 7471 1 Molybdenum 246.1 2 Nickel 7520 1 Selenium 7741 1 Silver 7760 1 Thallium 279.1 2 Vanadium 286.1 2 Zinc 289.1 2 Cyanides 9010 Phenols 420.1 2 Sulfides 9030 1 Fluorides 340.2 2 Hexavalent Chromium 7196 1 Oil & Grease 92141. pH 9040 1 Pensky-Martens Flash Point 1010 1 PCB's 8080 1 TOX, ug/g 20. 9020 1 500. 500. 10000. 75. 100. 2500. 8000. 2500. 1000. 20. 3500. 2000. 100. 500. 700. 2400. 5000. Comment: Ail contaminants reported above are [n mg/kg (unless otherwise stated) on an as received (wet) sample basis. Results reported represent totals (TTLC) as sample subjected to appropriate techniques to determine total levels. (-) refers to "less than". (1) "Test Methods for Evaluating Solid Wastes", SW 846, July, 1982. (2) "Methods for Chemical Analysis of Water and Wastes", EPA-600, 14-79-020 B C LABORATORIES, INC. BY J. J. Eglin AGflICUL ~UII~ - BORATORIES, 'Inc. J. J. EGLIN, REG. CHEM. ENGII. 4100 PIERCE RD., BAKERSFIELD,' CALIFORNIA 93308 PHONE 327-4911 McNabb Construction 7808 Olcott Ave. Bakersfield, CA 93308 AT~: Bryan McNabb Date Reported: Date Received: Laboratory No.: 02/17/88 02/09/88 1086-7 TOTAL EXTRACT CONTAMINANTS BY ACID DIGESTION Sample Description: Valley Olds, 2/9/88, North Waste Oil Tank Line @ 2' sampled by; David Rittenhouse Title 22 Total Metals, mg/kg Sample Results Method Reference T_TLC, mg/kg Antimony 7040 1 Arsenic 7061 1 Barium 7080 1 Beryllium 210.1 2 Cadmium 7130 1 Chromium 7190 1 Cobalt 291.1 2 Copper 220.1 2 Lead 590. j 7421 1 Mercury 7471 1 Molybdenum 246.1 2 Nickel 7520 1 Selenium 7741 1 Silver 7760 Thallium 279.1 2 Vanadium 286.1 2 Zinc 289.1 2 Cyanides 9010 1 Phenols 420.1 2 Sulfides 9030 1 Fluorides 340.2 2 Hexavalent Chromium 7196 Oil & Grease 67823. ~ pH 9040 1 Pensky-Martens Flash Point 1010 1 PCB's 8080 1 TOX, ug/g (-) 20. 9020 500. 500. 10000. 75. 100. 2500. 8000. 2500. 1000. 20. 3500. 2000. 100. 500. 700. 2400. 5000. Comment: All contaminants reported above are in mg/kg (unless otherwise stated) on an as received (wet) sample basis. Results reported represent totals (TTLC) as sample subjected to appropriate techniques to determine total levels. (-) refers to "less than". (1) "Test Methods for Evaluating Solid Wastes", SW 846, July, 1982. (2) "Methods for Chemical Analysis of Water and Wastes", EPA-600, 14-79-020 B C LABORATORIES, INC. BY J. J. Egltn C~£MICA~ AIqA~ P£T#OL£U¥ RATORIES, I r'lC. J. J. EGLIN, REG. CHEM. ENGII. 4100 PIERCE RD., BAKERSFIELD, CALIFORNIA 93308 PHONE 327-4911 McNabb Construction 7808 Olcott Ave. Bakersfield, CA 93308 ATTN: Bryan McNabb Date Reported: Date Received: Laboratory No.: 02/17/88 02/09/88 1086-8 TOTAL EXTRACT CONTAMINANTS BY ACID DIGESTION Sample Description: Total Metals~ m~/k~. Antimony Arsenic Barium BerylliUm Cadmium Chromium Cobalt Copper Lead 11.8 Mercury Molybdenum Nickel Selenium Silver Thallium Vanadium Zinc Cyanides Phenols Sulfides Fluorides Hexavalent Chromium Oil & Grease 1428. pH Pensky-Martens Flash Point PCB's TOX, ug/g (-) 20. Sample Results Valley Olds, 2/9/88, North Waste Oil Tank Line @ 6' sampled by; David Rittenhouse Title 22 Method Reference 7040 1 7061 1 7080 1 210.1 2 7130 1 7190 1 291.1 2 _220.1 2 7421 1 7471 1 246.1 2 7520 1 7741 1 7760 1 279.1 2 286.1 2 289.1 2 9010 1 420.1 2 9030 1 340.2 2 7196 1 9040 1 1010 1 8080 1 9020 i TTLC, mg/k~ 500. 500. 10000. 75. 100. 2500. 8000. 2500. 1000. 20. 3500. 2000. 100. 500. 700. 2400. 5000. Comment: All contaminants reported above are in mg/kg (unless otherwise stated) on an as received (wet) sample basis. Results reported represent totals (TTLC) as sample subjected to appropriate techniques to determine total levels. (-) refers to "less than''. (1) "Test Methods for Evaluating Solid Wastes", SW 846, July, 1982. (2) "Methods for Chemical Analysis of Water and Wastes", EPA-600, 14-79-020 B C LABORATORIES, INC. BY J. J. Eglin · 700 Flower Street Bakersfield, California 93305 Telephone (805) 861-3636 'Facility Name ! Address COUNTY HEALTH DEPARTME~ HEALTH OFFICER Leon M Heberlson, M.D. ENVIRONMENTAL HEALTH DIVISION ~.~f~...~...~. DIRECTOR OF ENVIRONMENTAL HEALTH ~z~d'//~~~.'~. Vernon S. Relchard * * UNDERGROUND TANK DISPOSITION TRA~ING RECORD * * This form is to be returned to the Kern County Health Department within 1~4 days of acceptance of tank(s) by disposal or recycling facility. The holder of the permit with number noted above is responsible for insuring that this form is completed and ret,~rncd. Section1 - To be filled out b_~ tank removal contractor: Tank Removal Contractor: Date Tanks Removed ~/?/~ No. of Tanks / / Sect2on2 - To be filled out ~ contractor "decontaminating" tank(s): Tank "Decontamination" Contrac[or Authorized ~ep~esentat~ve of contractor certifies by s~fn~nC belo~ that tank(s) have been decontaminated ~n accordance with Kern County Uealth Department ~equi~ement~. ~l~ure ' Title' Section 3 - T~ b~ .fille~ out and signed by an authorized representative of the treatment, storage, or disposal facility accepting, tank(s): Facility Name Address 2202 S. MILLIKEN AVE. ONTAIRO, CA Date Tanks Received FEBRUARY ]0~ ]988 Signature ~J~z~/~/~/~/ Title (A hot epresentative) AMERICAN METAL RECYLCING; INC. Phone #(_7.14)947-2888 Zip 91761 No. of Tanks ~ OFFICE MANAGER * * * MAILING INSTRUCTIONS: Fold in half and staple. Postage and mailing label have already been affixed to outside for your convenience. DISTRICT OFFICES ~ .... ~,,,~,,n ~ ~n ~ Oelano Lamon! ~ke {.~bel{~".') Mojave Ridgecrest Shafter . Taft KERN COUKT¥ HEALTll D£PARTMENT DIVISION OF ENVIRONMENTAL REALTH 1700 FLOWER STREET. BAKERSFIELD. CA (805) 861-3636 93305 PTA APPLICATION FOR PERMIT FOR PERMANENT CLOSURE/ABANDONMENT OF UNDERGROUND HAZARDOUS SUBSTANCES STORAGE FACILITY THIS APPLICATION IS FOR ~REMOVAL. OR []ADANDONMENT IN PLACE PROJECT CONTACT , PACIL.ITY NA~E ]TANK REMOVAL C0~TR~CT~I~ ~PROPOSED PROJECT~TA~ING DATE CALIFORNIA LICENS~ ~ (FILL OUT ONE APFLICATION PER FACILITY) PHONE # DAYS- NIGHTS- SEC/T/R (RURAL LOCATIONS ONLY) ADDRESS ~_. I.EAREST CROSS STREET AD PIIONE WORKER'~ COMPENSATION · IN~ER PRE¥~I~NARY SITE ASSESSMENT CONTRACTOR WORKER'S COMPENSATION # LABO~A'~RY THAT WILL ANALYZE SAMPLES INSURER ADD~ESS · PHONE PHONE PHONE CHEMICAL COMPOSITION OF MATERIALS STORED TANK · VOLUME CIIENICAL STORED (NON-CO{~HERCIAL NAME) DATES STORED CHEMICAL PREVIOUSLY STOREI / /~ ~(.. (-~,, / ~ S-~To ~C? ~0 ,VO~ TO {NATF..~O FACILITY PROVIDED BY {DEPTH TO GROUNDWATER · · {NEAREST WATER 6L~ - GIVE OISTANCE ~D DESCRIBE TYPE IF WITHIN 500 FEET SOIL TYPE AT FACILITY I~SIS FOg SOIL TYPE ~D~ROUND~ATER DEPTH DETE~INATiO~ . t{O~ RESIDUE IN TANK(S) AND PIPING IS TO BE REHOVED AND DISPOSED OF (INCLUDE TRANSPORTATION AND DISPOSAL COMPANIES}: 0I D ~ SA C ' ON 0 : ' . - · ~:' PLEASE PROVIDE INFO~TION REQUESTED O~ REVERSE S}DE O~ THIS SHEET BEFORE SUBMITTING APPLICATION FO~ ~EVIE~ ' ' THIS FORM H S BEE COMPLETED UNDER PENALTY OF PERJURY AND TO THE BEST OF ~Ok~LED.GE IS TRUE AND CORRECT. (For" ·HM~P-]40) ' APPENDIX B Fresno Modesto Visalia Bakersfield TL 989-099-02 APPENDIX B s-m ' Copies of the Chain-of-Custody Documentation Fresno Modesto Visalia Bakersfield The. Twining Laboratories, Inc. CHAIN OF CUSTODY RECORD Project No. [?--~J/ Date/Time Sampled Affiliation of Sampler/Shipper Address '~ Zip Telephone Number Street/ Coil,actor's N~ ~ Transported By .~'~Z~ ~ ' dD~l l ~'~ Date Shipped - I Sample Receiver Address Date/Time Received Comments Collector's Sample No. Sample Description Chain of Possession:/'~ (_._.,)~gnature (~gnat.re ~/' Signature Signature Analysis Requested Affiliation Affiliation Affiliation Inclusive Dates Inclusive Dates Inclusive Dates Inclusive Dates The Twining Laboratories, Inc. CHAIN OF CUSTODY RECORD Project No. \/~ I, ~4~ Date/Time Sampled Affiliation of Sampler/Shipper Number 'Stre~ ~ Cit~ ~ State Zip Telephone ~ ~ Signature Transported By ~~/~ Sample Receiver Address Date/Time Received Comments Collector's Sample No. q Sample Description .Analysis Requeste¢ L_ ~_~ /) Chain of Possession: Signature Signature Affiliation Affiliation Affiliation Inclusive Dates Inclusive Dates Inclusive Dates Inclusive Dates The Twining Laboratories, Inc. CHAIN OF CUSTODY RECORD Transported By Zip Signature Telephone Sample Receiver Address Date/Time Received Comments Collector's Sample No. Sample Description An. alysis Requested , r'~ ~ ;', . !"; !.'-'. i,~' I ~L..,,.-,,._~ Chain of Possession: 0 Si~at..'"~ 3. Signature Signature ~-~'/4,//,¢~ ,,~,,~. Affilia~on Affiliation Affiliation Affiliation Inclusive Dates Inclusive Dates Inclusive Dates TL 988-099-02 APPENDIX A Fresno Modesto Visalia Bakersfield TL 989-099-02 A-1 APPENDIX A LOG OF BORINGS This appendix contains the final logs of borings. These logs represent our interpretation of the contents of-the field logs and the results of the field tests. The boring logs and related information depict subsurface conditions only at these locations and at the particular time designated on the logs. Soil conditions at other locations may differ from conditions occurring at these boring locations. Also, the passage of time may result in changes in the soil conditions at these boring locations. In addition, an explanation of the abbreviations used in the preparation of the logs, and a description of the Unified Soils Classification System are provided. Fresno Modesto Visalia Bakersfield LOG OF BORING PROJECT: VALLEY OLDSMOBILE HOLE No.: B-1 2300 "H" STREET, BAKERSFIELD, CALIFORNIA SHEET No. 1 OF 1 JOB No: qRR-nq~-n9 LOCATION: See Site Map and Remarks DRILL TYPE: DRILLED BY: T. Conlev LOGGED BY: T. Wr±ght ELEVATION: TOP OF HOLE: - - FT. REMARKS: 7 feet west and 2 feet north from GROUNDWATER: - - northeast buildinK corner DATE: STARTED: (30O slant drill beneath h,,~]din~ COMPLETED: 10/28/88 ~ GRADATION ENGINEERING · ~ Dz ~ --~ PERCENT ~ROPERTIES: ~ ~ z~ ~ ~ ~ - RETAINED rEST, TYPE AND CLASSIFICATION AND DESCRIPTI'ON ~o--~ -- z --~ ~ x ~ ~ oo ~-- ~ ~LATE NUMBER Asphalt Paving at Surface 5-- SAND, Silty; very moist, medium grained, gray (SM) LRS Decreasing moisture content SAND, Poorly Graded; moist, - fine to medium grained, tan LRS _ (S?) SILT, Sandy; moist, low plasti- LRS city, dark brown (ML) 20-- Increasing Sand Content LRS Bottom of Boring 25-- The Twining Laboratories, Inc. Visalla Fresno Modesto Bakersfield PROJECT: VALLEY OLDSMOBILE HOLE No.: ~B-2 2300 "U" STREET, /ERSFIELD, CALIFORNIA SHEET 0 1 OF 1 JOB NO: QRR-ogq-o?' LOCATION: See Site· MaP and Remarks DRILL TYPE: B-40 DRILLED By: T. ConleY LOGGED BY: T. Wright ELEVATION: TOP OF HOLE: - - FT. REMARKS: 10 (eet west and 6 'feet north from GROUNDWATER: '- - northeamt building corner DATE: STARTED: 10/28/88 COMPLETED: ±0/18/88 · ~ ~ > GRADATION ENGINEERING ~ ~ ~ z zO ~ u-- ~ PERCENT PROPERTIES: ~- =~ ~ ~ ~ ~ -- RETAINED TEST, TYPE AND ~ CLASSIFICATION AND DESCRIPTI'ON ~cv~ - = ~ -- ~ ~ x m :~ ~ o o ~-- ~ ~ ~%PLATE NUMBER Asphalt Paving at , Surface 5~ SAND, Silty; moist, fine to medium grained, dark brown ~RS (SM) 10-- Increasing sand content iRS 15-- Becoming brown, interbedded silt and poorly graded sand lenses iRS 20-- SAND, Poorly Graded; moist, - fine to coarse grained, tan iRS _ (SP) 25 -- ]RS Bottom of Borin~ The. Twining L bon tor'ie$, .Inc. Vlsalia Fresno Moaesto Bakersfield TLI06 PROJECT: VALLEY OLDSMOBILE tHOLE. No.: B-3 2300 "H" STREET, ~RSFIELD, CALIFORNIA SHEETW. 1 OF 1 JOB No: 988-099-02 ! LOCAT I ON: See. Site Map and Remarks DR~LL TYPE: B-40 DRILLED BY:. T.. Conley LOGGED BY: T~ wright ELEVATION: TOP OF HOLE: - - FT. REMARKS: Center of Former Tank LoCation GROUNDWATER: DATE: STARTED: 10/28/88 COMPLETED: 10/28/88 ". ~ ~ z -~ -- ~- PERCENT PROPERTIES: ::f i,i,_ z~ ~ ~- ~ ~ -- RETAINED rEST, TYPE AND ~- CLASSIFICATION AND DESCRIPTION - SAN-D; very silty, moist, (SM) 5-- LRS 0-- - LRS 15 -- SAND~ very silty, moist, ~ becoming brown (SM) LRS '0 - GRAVEL LRS SAND, Poorly Graded; fine to loose grained with gravels, tan LRS 5 ~ BRttom of Borin~ Vlsalia Fresno MoOesto ~a~ersfielcl TLI06 PROJECT: VALLEY OLDSMOBILE_ HOLE N~: ¥ B-4 2300 "H" STREET, ~RSFIELD, CALIFORNIA SHEET~5~ 1 OF 1 JOB No:. 988-099-02 LOCAT~0N: See Site Man and Remarks DRILL TYPE: B-40' DRILLED BY: T. Conle¥ LOGGED BY: T; Wright ELEVATION: TOP OF HOLE: -- FT. REMARKS: 0 feet east and 12 feet north from GROUNDWATER: - - northeast buildin~ corner DATE: STARTED: 10/28/88 COMPLETED: 10/28/88 . ,., ~ >- GRADATION ENGINEERING · ~ ~ = -~ --~- PERCENT ~ROPERTIES: ~_ CLASSIFICATION AND DESCRIPTION -~o-~'"-~ z ~ -~ ~ ~ --m ~ ~-- x RETAINED. FEST, TYPE AND z~ o z ~ ~ ~z < = ~ ~% 'x~ :LATE NUMBER S~, Silty; moist, fine to - medi~ grained, dark brown (SM) 5~ ;RS 10 _ S~D, Poorly Graded; moist, ERS fine grained to coarse, tan - (S~) - L~S 25-- VIsalia Fresno Mooesto ~aker~lield ! I I 1 I TL 989-099-02 A-2 LOGS OF EXPLORATIONS EXPLANATION OF ABBREVIATIONS LRS Split barrel ring sampler, 2.5-inch I.D., for taking undisturbed samples. sss (sPT) Standard penetration resistance tests-- results recorded as the number of blows of a 140 pound hammer falling 30 inches required to drive a 2 inch O.D. split sample spoon the second and third 6 inch increments of an 18 inch distance. Fresno Modesto Visalia Bakersfield MAJOR DIVISIONS SYMBOLS TYPICAL NAMES GW Well-graded gravels or gravel-sand mixtures, little or no fines GRAVELS ~ - GP Poorly graded gravels or gravel-sand mixtures, little or no fines -- ~ (More than '.,, of coarse GM Silty gravels, gravel-sand-silt mixtures ~0 ~ fraction > no. 4 sieve size) ~ ~ GC Clayey gravels, gravel-sand-clay mixtures ~ ~ SW Well-graded sands or gravelly sands, little or no fines o~ .SANDS SP Poorly graded sands or gravelly sands, little or no fines ~ A (More than '.,, of coarse SM Silty sands, sand-silt mixtures fraction (no. 4 sie~e size) SC Clayey sands, sand-clay mixtures ME Inorganic silts and very fine sands, rock flour, silty or clayey finesands or clayey silts with slight plasticity -~ CE Inorganic clays of Iow to medium plasticity, gravelly clays, sandy clays, silty clays, ~, LL · 50 lean clays = '~ CE Organic silts and organic silty clays of Iow plasticity ~ SILTS & CLAYS MH Inorganicsilts. micaceousordiatomaceousfinesandyorsiltysoils, elasticsilts EL · 50 CH Inorganic clays 61 high plasticity, fat clays OH Organic clays of medium to high plasticity, organic silty clay. organic silts HIGHLY ORGANIC SOILS Pt Peat and other highly organic soils UNIFIED SOIL CLASSIFICATION SYSTEM COHESIVE SOILS GRANULAR SOILS Description Blows/ft. Description Blows/ft. very soft < 2 very loose < 5 soft 2_ 7 b~ ~oose 5- I 0 medium(firm) 5 - 8 medium dense 1 1 - 3 0 stiff 9 - ~ ~ dense 3 1 - 5 0 very stiff ~ ~ - .~ 0 very dense ~ ~ 0 hard ~ 3 0 CONSISTENCY CLASSIFICATION * CLASSIFICATION RANGE OF GRAIN SIZES U.S. Standard Grain Size Grain Type Sieve Size in Millimeters Boulders above 12" above 305 Cobbles 12" to 3" 305 to 76.2 'Gravel 3" to no. 4 76.2 to 4.76 coarse (c) 3" to ¥, 76.2 to 19.1 fine (fl ~' to no. 4 19.1 to 4.76 Sand no. 4 to no. 200 4.76 to 0.074 coarse (c) no. 4 to no. 10 4.76 to ZOO medium (m) no. 10 to no. 40 2.00 to 0.420 fine (f) no. 40 to no. 200 0.420 to 0.074 Silt & Clay below~o. 200 below 0.074 GRAIN SIZE CLASSIFICATION 5O z 40 - 3O m 20 LIQUID LIMIT PLASTICITY CHART Geotechnical and Environmental Consultants · Engineering and Chemical Laboratories REMEDIAL INVESTIGATION UNDERGROUND WASTE OIL TANK VALLEY OLDSMOBILE FACILITY 2300 "H" STREET BAKERSFIELD, CALIFORNIA Presented to: Isaacs 3939 Bernard Bakersfield, March and Bailey Street, Suite 6 California 93306 6, 1990 2527 Fresno Street · P.O. Box 1472 Fresno, California 93716 · (209) 268-7021 1405 Granite Lane, Suite 1 Modesto. CaJifomia 9535'l · (209) 523-0994 9401 West Goshen Avenue Visalia, California 93291 · (209)651-2190 3701 Pegasus Drive, Suite 124 Bakersfield, California 93308 · (805) 393-5088 TL 988-099-02 TABLE OF CONTENTS PAGE 1.0 INTRODUCTION ...................... 2.0 BACKGROUND INFORMATION ................ 2.1 Site Description ................ 2.2 Regional Geological and Hydrological Characteristics ................. 2.3 Project History ................. 3.0 PURPOSE AND SCOPE OF INVESTIGATION .......... 4.0 INVESTIGATIVE PROCEDURES ............... 4.1 Soil Boring and Sampling Locations ........ 4.1.1 Soil Sampling Procedures ......... 4.1.2 Decontamination Procedures ........ 4.1.3 Sample Handling and Chain-of-Custody Procedures ................ 4.1.4 Safety Work Plan ............. 4.2 Laboratory Testing ................ 4.2.1 Chemical Analysis ............. 4.2.1.1 Quality Assurance/Quality Control (QA/QC) Procedures ........ 5.0 RESULTS AND FINDINGS ................. 5.1 Soil Profile ................... 5.2 Analytical Results of Soil Sample Analyses .... 1 2 2 3 4 7 8 8 9 11 11 12 13 13 14 16 16 16 Fresno Modesto Visalia Bakersfield TL 988-099-02 TABLE OF CONTENTS 6.0 EVALUATION ...................... 6.1 Extent of Petroleum Product Migration ...... 6.2 Potential Environmental Effects ......... 6.3 Additional Studies and Remedial Action ...... 7.0 CONCLUSIONS ...................... 8.0 RECOMMENDATIONS .................... 9.0 LIMITATIONS ...................... 10.0 CLOSING ........................ LIST OF DRAWINGS: Drawing No. 1 - Site Location Map ' Drawing No. 2 - Site Plan Depicting Site Features Drawing No. 3 - Location of Exploratory Soil Boring LIST OF TABLES Table I Table II Table III Table IV - Analytical Results of Soil Analyses ....... - Chemical Characterization and Methods ..... - Analytical Results of Soil Analyses ....... · - Analytical Results of Soil Analyses ....... LIST OF APPENDICES: APPENDIX A - Logs of Borings ................ - Explanation of Abbreviations ......... APPENDIX B - Chain-of-Custody Documentation ........ APPENDIX C - Laboratory Results .............. Paqe 19 19 21 24 26 27 28 29 6 14 17 18 A-1 A-2 B-1 C-1 Fresno Modesto visalia Bakersfield Geotechnicaland EnvironmentaIConsultants · Engineering and Chemical Laboratories REMEDIAL INVESTIGATION UNDERGROUND WASTE OIL TANK VALLEY OLDSMOBILE 2300 "H" STREET BAKERSFIELD, CALIFORNIA 1.0 INTRODUCTION: This report presents the results of a remedial investigation to determine the general extent of petroleum product migration by a former 550 gallon underground waste oil storage tank located at 2300 "H" Street in the City of Bakersfield, California, until February 9, 1988. This investigation was authorized by Mr. Cecil Bailey of Isaacs and Bailey via a letter to proceed dated September 6, 1988, and in accordance with our proposal dated August 27, 1988. The contents of this report include background information regarding existing site features, regional geological and hydrological characteristics, and the project history. In addition, the purpose and scope of the investigation, a description of the investigative procedures used and the subsequent findings obtained are presented. Finally, the report provides an evaluation of the findings, and related conclusions and recommendations. The three report appendices contain the logs of soil borings (Appendix A); copies of the chain-of-custody documentation (Appendix B), and copies of the laboratory results (Appendix C). E] 2527 Fresno Street · P.O. Box 1472 Fresno, California 93716 · (209) 268-7021 [] 9401 West Goshen Avenue Visalia, California 93291 · (209)651-2190 E] 1405 Granite Lane, Suite 1 ~ 3701 Pegasus Drive, Suite 124 Modesto, California 95351 · (209) 523-0994 Bakersfield, California 93308 · (805) 393-5088 TL 988-099-02 Page 2 This investigation was conducted by the Environmental Engineering Division of The ~Twining Laboratories, Inc. (Twining), located in Bakersfield, California. 2~0 BACKGROUND INFORMATION A description of the site features, the regional geological and hydrological characteristics, and the project history are summarized in the following subsections. 2.1 Site Description: The site is located at 2300 "H" Street in the City of Bakersfield, California. The site is rectangular in shape approximately 800 feet by 300 feet in plan dimension. The site is bound on the north by 24th Street, on the east by Eye Street, on the south by 23rd Street, and on the west by "H" Street. A vicinity map is presented on Drawing No. 1. The site is occupied by the Valley Oldsmobile facility which consists of an automobile repair shop, an automobile showroom, and business offices. At the time of the field investigation (October 26, 1988), the former underground waste oil tank had been removed and the excavation was backfilled. The former tank was located in the central part of the site, adjacent to the northeast corner of the showroom building. The site is paved with asphaltic concrete. A site plan showing the former tank location is presented on Drawing No. 2. Fresno Modesto Visalia Bakersfield =si PROJECT SITE 24th STREET PROPERTY LINE · ' C~R' LOT NORTH , FORMER 550 WASTE OIL TANK~. ~ BULIDING BUILDING I LEGEND ~ -- P OVERHEAD LINES I I FORMER TANK LOCATION - -- - PROPERTY LINE , FORMER PIPING I BUILDING 23rd STREET SCALE: DATE SITE PLAN 1":40' ?-'2~'-qOHDM .. ~~r The__ _ .Twining VALLEY -OLDSMOBILE FACILITY OaAw~ BY APPROVED BY: 2600 "H" STREET BMB Laboratories, Inc. BAKERSFIELD, CALIFORNIA DRAWING No 2 of ~ F'" £SNO/MO?E[S TO/¥1 SAL IA/SAKE RSF,£ LC TL 988-099-02 Page 3 2.2 Reqional Geoloqical and Hydroloqical Characteristics: Bakersfield is located within the southern San Joaquin Valley Region of the Great Valley (valley) Geomorphic Province of California. The valley is a nearly flat, northwest to southeast trending alluvial plain which is approximately 450 miles long and 50 miles wide. The valley extends from the granitic Sierra Nevada Range on the east to the metamorphic and sedimentary Coast Ranges on the west. The valley is bound on the north by the Klamath Mountains and on the south by the Tehachapi Mountains. The valley is a geosyncline that has been filled with a sequence of marine and continental sedimentary rocks of Tertiary and Quaternary age resting uncomformably on a basement complex of metamorphic and igneous rocks (Dibblee and 0akshot, 1953). The surficial Quaternary deposits in the Bakersfield area occur as alluvial deposits derived from the Sierra Nevada Range to the east. These deposits generally are oxidized, and on the upper parts of the larger fans, adjacent to the mountains, consist of moderately to highly permeable, yellowish brown gravels, sands and silts.. On the lower parts of the fans, these deposits consist of poorly to moderately permeable, yellowish brown sands and silts. The surficial geology of the subject property consists of alluvial sands and silts (Wood and Dale, 1964). Groundwater in the Bakersfield area occurs within the Edison subarea of the Edison-Maricopa area. This subarea includes the Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 4 urban and irrigated areas along the southeastern border of the San Joaquin Valley between the Kern River and Caliente Creek. Part of its southern boundary is formed by a northwest trending groundwater barrier coinciding generally witlh the Edison Fault. Westward from the East Side Canal,. three miles northwest of Edison, the subarea is bound on the south by an arbitrary line marking the approximate southern limit of the area in which appreciable quantities of water are obtained from the Kern River formation. Groundwater in the Edison subarea is used principally for the municipal and agricultural water supply in the Bakersfield urban area. Groundwater in the Bakersfield area occurs predominantly in unconfined (water table) conditions in the unconsOlidated alluvium. Depth to groundwater at the site is approximately 165 feet below site grade (BSG) according to information provided by the California Water Service Company for September of 1989. The regional direction of groundwater flow is northeast. Groundwater recharge in the Edison subarea is derived from surface waters from irrigated land to the west, from the Kern River to the north of the subarea, and from Caliente Creek on the east (Wood and Dale, 1964). 2.3 Project History: A 550 gallon underground waste oil storage tank was formerly located on the site. The 32 year old tank was removed from the site on February 9, 1988, by McNabb Construction Company. Four soil samples were obtained by Mr. David Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 5 Rittenhouse under the direction of the Kern County Environmental Health Department (KCEHD) at the time the tank was removed. Two soil samples were taken from below the invert level of the former tank' at depths of 2 feet and 6 feet. Two additional soil samples were taken at depths of 2 fee~ and 6 feet below the piping which extended approximately 30 feet west of the tank. The soil samples were delivered to B'.C. Laboratories in Bakersfield, California, where they were analyzed for lead, oil and grease, and total halogenated hydrocarbons (TOX) as required by the Kern County Environmental Health Department (KCEHD). The analytical results of the soil sample analyses are summarized in Table No. 1. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 6 TABLE No. 1 ANALYTICAL RESULTS OF SOIL SAMPLE ANALYSIS Date Sampled: February 9, 1988 Sample Oil and Grease, Lead, ID mq/kg mq/kq Soil No. 1 2 feet below tank TOX, mq/~ 15,326 39.8 <20 Soil NO. 2 6 feet below tank 92,141 50.4 20 Soil No. 1 2 feet below piping 67,823 59.0 <20 Soil No. 2 6 feet below piping 1,428 11.8 <20 mg/kg = milligrams per kilogram (parts per million) TOX = Total Halogenated Hydrocarbons < = less than The analytical results of the laboratory analyses revealed elevated concentrations of oil and grease and lead in the soils below the former tank and below the piping. Based on the above findings, Mr. Bill Scheide of the KCEHD requested a remedial investigation (RI) work plan for assessing the extent of petroleum product migration beneath the former underground waste oil storage tank. An RI work plan was prepared by Twining at the request of Mr. Cecil Bailey. The RI work plan was subsequently approved by KCEHD Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 7 via a telephone conversation on October 25, 1988, between Mr. Bill Scheide (KCEHD) and Mr. Theodore Wright (Twining). 3.0 PURPOSE AND SCOPE OF INVESTIGATION The purpose of the remedial investigation was to determine the vertical and lateral extent of petroleum product migration caused by leakage of the former underground waste oil storage tank. This work was conducted in accordance with Twining's RI work plan dated September 1, 1988. In addition, the data obtained were evaluated to assess the potential environmental effects of the petroleum product migration. Finally, the need for additional studies and/or remedial actions were assessed. The actions taken to achieve the stated purpose are summarized as follows: 1. An RI work plan (dated September 1, 1988) was prepared and submitted to the KCEHD and subsequently approved by Mr. Bill Scheide of the KCEHD on October 25, 1989, with the following revisions: a)That lead and cadmium analysis be perfo,rmed on a portion of the soil samples taken. b) That TOX analysis would not be required for this investigation. 2. Mr. Cecil Bailey with Isaacs and Bailey and Mr. Joe Canas with KCEHD were consulted during this investigation. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 8 Four exploratory soil borings were drilled approximate to the location of the former waste oil tank. The soil borings were drilled to a maximum depth of 26.5 feet BSG. Soil samples were Collected at depths of 5, 10, 15, 20 and 25 feet BSG in each soil boring. Soil samples were prepared for shipment to Twining's laboratory in Fresno for analysis. Soil samples from the soil borings were analyzed for Oil and Grease, Total Lead, and Total Metals. The data obtained from the investigation and the results of a prior sampling event were evaluated to determine the approximate vertical and lateral extent of petroleum product migration, the potential environmental effects of the petroleum product migration, and the need for additional studies or remedial actions. This report was prepared to present our investigative procedures, findings and related conclusions and recommendations. 4.0 INVESTIGATIVE PROCEDURES The investigation consisted of subsurface exploration and a laboratory testing program. The details of each of these phases are summarized in the following subsections. 4.1 Soil Borinq and Samplinq Locations: Four exploratory borings were drilled approximate to the former tank location to obtain soil samples for laboratory analysis. The locations of the soil borings are shown on Drawing No. 3. Soil boring B-1 was slant drilled at a 30 degree angle approximately 6 feet southwest from the center of the former tank Fresno Modesto Visalia Bakersfield NORTH [PROJECT No. TL 988-099-02 'LEGEND y..~v~SOIL BORING LOCATION FENCE FORMER TANK LOCATION FORMER PIPING LOCATION CAR LOT ASPHALTIC CONCRETE PAVEMENT X SOIL B~RING LOCATIONS VALLEY OLDSMOBILE FACILITY 2600 "H" STREET BAKERSFIELD, CALIFORNIA X X X X X B-4 FORMER UNDERGROUND TANK LOCATIO~ BUILDING SCALE 1"=10' DR,~W N 8Y DATE 2.-23-90 APPROVED BY' HDM DRAWING No 3 of 5 The Twining Laboratories, Inc. F~ESNO//MOOESTO/VI SAL IA.-"'BAK£ RSFI/LO TL 988-099-02 Page 9 location to a vertical depth of 21.5 feet BSG. Soil samples were taken at intervals of 5 feet. The soil samples were analyzed in our laboratory for oil and grease. Soil boring B-2 was drilled approximately 8 feet northwest from t~e center of the former tank location to a depth of 26.5 feet BSG. The soil samples were analyzed for oil and grease and total lead. The soil sample obtained at 11.5 feet BSG was analyzed for total metals and total lead. Soil boring B-3 was drilled approximately in the center of the former tank location to a depth of 26.5 feet BSG. The soil samples were analyzed for oil and grease. Soil boring B-4 was drilled approximately 10 feet northeast from the center of the former tank location to a depth of 26.5 feet BSG. The soil samples were analyzed for oil and grease. During the field investigation, it was not possible to drill any exploratory borings in the vicinity of the former waste oil pipeline, located west of the former tank location, because of limited drill rig access caused by a fence located 8 feet north of the building. 4.1.1. Soil Samplinq Procedures: The exploratory soil borings were drilled under the direction of a staff engineer from our firm, on October 28, 1988, using a Mobile B-40 truck-mounted drill rig equipped with 6-5/8 inch diameter hollow stem augers. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 10 The samples were obtained by driving a thin-walled steel sampler, equipped with three 2-1/2 inch diameter, 6-inch long brass sleeves, 18 inches into the soil. The ends of the sleeves were covered with teflon tape, capped with plastic fittings, and secured with synthetic tape. The bottom sleeve was retained for laboratory analysis. The soil contained in the upper 12 inches was retained on-site with the drill cuttings. Continuous logs of the soils encountered in the soil borings were recorded. The field soil classification was in accordance with the Unified Soil Classification System and consisted of particle size, color, and other distinguishing features of the soil. Upon completion of the drilling and sampling, the borings were backfilled with a sand-cement slurry. -All drill cuttings generated from the borings were covered with visqueen and are presently stored on the site. Isaacs and Bailey will be responsible for properly disposing of this material. The soil boring locations were determined by using a measuring tape with reference to the building located to the south of the former tank location as shown on the site plan, and should be considered accurate to within 1 foot. The elevations of the test borings were not determined as part of this investigation. The location of the test borings are described on the soil boring logs in Appendix A. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 11 4.1.2 Decontamination Procedures: Prior to drilling operations, the auger and associated drilling equipment were thoroughly cleaned using a high pressure hot water steam washer. The hot water washer had a pressure of 1,000 psi and water temperature of 200°F. In addition, the soil samplers wereWashed in a Trisodium Phosphate (TSP) solution, rinsed in water, and air dried prior to initial use and between each sampling event to preclude the possibility of cross-contamination between samples. 4.1.3 Sample Handlinq and Chain-of-Custody Procedures: Records were developed for all. soil samples including: sampling date, sample type, location, and method of preservation. The sample containers were banded and sealed with shipping seals. All samples were immediately placed on ice for shipment to our Fresno laboratory for analysis. Chain-of-custody procedures, described in "Test Methods for Evaluating Solid Waste", SW-846. U.S. EPA, May of 1988, Third Edition, were followed. A copy of the chain-of custody documentation associated with the sampling, transport, and analysis of soil samples obtained during the investigation is,presented in Appendix B. All soil samples retrieved in the field were brought to our laboratory in Fresno, California. The driller in charge of the field investigation carried both the samples and chain-of-custody form to the laboratory where he presented them to the laboratory Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 12 director. The director or an authorized analyst signed the chain- of-custody form, presented a duplicate copy to the driller, and processed the samples. The director's responsibilities included monitoring the progress of thE; samples and insuring the sample's integrity within'the laboratory. This involved assigning each sample a laboratory number and maintaining a cross-reference between the sample's field identification information and its laboratory identification. The analyst's responsibilities included maintaining accurate records of the sample analyzed, along with the analytical data produced. This involved labeling chromatograms and maintaining the laboratory numbers on all subsamples taken from the samples submitted, labeling all glassware used in the analyses, and properly labeling sample extract containers with the sample's laboratory numbe r. After the analyses were completed, the samples were transferred to a limited access storage room. In addition, the chain-of-custody form, chromatograms, and other pertinent information are maintained for future reference. 4.1.4 Safety Work Plan: Due to the possibility of health hazards associated with exposure to various chemicals, field and laboratory personnel who could possibly come in contact with the samples obtained from the sit..= were issued safety gear. This included disposable coveralls, rubber gloves, organic vapor masks, Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 13 rubber boots, safety glasses, and hard hats. The field engineer and laboratory director were responsible for the implementation of the safety work plan. 4.2 Laboratory Investigation: Chemical tests were conducted o5 soil samples retrieved in the field. A description of the tests performed during this phase of the investigation is provided in the following subsections. 4.2.1 Chemicai Analysis: Analytical tests were performed to determine the presence and concentration of key petroleum constituents associated with the product stored in the tank. Based on the suspected petroleum product discharge (waste oil), each soil sample was analyzed for the constituents of oil and grease as outlined in Table No. 2, using the listed methods. In addition, a soil sample was analyzed for total metals and for total lead. The analytical methods used for the analysis of the samples were those' approved by the EPA. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 14 Table No. 2 Chemical Characterization and Methods Type of Analysis EPA SW-846 Methods Oil and Grease Method Mod. 413.1 adapted for soils Total Lead Method 7421 Total Metals 1) Digest - 3050 (HNOg digest) 2) Arsenic - 7061 (hydride) 3) Mercury - 7470 (cold vapor) 4) Selenium - 7741 (hydride) 5) Thallium - 7841 (graphic furnace) 6) Remaining Metals - 6010 (ICP) SW-846: Test Methods for Evaluatinq Solid Waste, U.S. EPA Office of Solid Waste and Emergency Response May 1988, 3rd Edition. 4.2.1.1 Quality Assurance/Quality Control Procedures ~: The QA/QC procedures followed for this investigation were developed to minimize outside interferences during the analysis for each sample. For this project., the laboratory director was in charge of creating and maintaining the program. Specific QA/QC procedures developed for this investigation are summarized as follows: Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 15 Organic Analysis 1) Method blanks were run to insure that the glassware and reagents were free of interference from chemicals that could invalidate analyses; 2) Standards were prepared using the highest purity reference material available;- 3) Duplicates of the soil samples were analyzed to monitor precision of the method; and 4) Duplicates of the soil samples were fortified to validate the accuracy of the method. Inorganic Analysis 1) All glassware was acid rinsed to remove any metal contaminants; 2) Deionized water was monitored daily for quality; 3) Duplicates of the soil samples were analyzed to monitor precision of the method; and 4) Duplicates of the soil samples were fortified to validate the accuracy of the method. Twining maintains a service contract on all major instrumentation; gas chromatograph, atomic absorption, ~chromatograph and total organic carbon analyzers. All instruments are serviced on a regular basis to ensure their accurate calibration. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 16 5.0 RESULTS AND FINDINGS The results of the field and laboratory investigations are summarized in the following subsections. 5.1 Soil Profile: The' soil profil'e at the site consisted of pobrly graded silty sands underlain by interbedded sandy silts and gravelly sands to a depth of 26.5 feet BSG, the maximum depth explored. The foregoing is a general summary of the subsurface conditions encountered in the soil borings drilled for this study. Detailed descriptions of the conditions encountered in the borings drilled are presented on the boring logs in Appendix A. The stratification lines on the log represent the approximate boundary between soil types; the actual in-situ transition may be gradual. 5.2 Analytical Results of Soil Sample Analyses: The analytical results of the soil samples obtained from soil borings B- 1, B-2, B-3 and B-4 are presented in Table No. 3 and No. 4. The laboratory documentation is provided in Appendix C. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 17 Table ~. 3 Analytical Results of Soil Sample Analyses Boring Sample Oil and Grease, Total Lead, Number Depth, ft. mq/kq mq/kq B-1 B-2 B-3 B-4 MDL 6.0 - 6.5 74,000 NA 11.0 - 11.5 15 NA 16.0 - 16.5 10 NA 21.0 - 21.5 10 NA 6.0 - 6.5 35 3 11.0 - 11.5 10 NA 16.0 - 16.5 5 3 21.0 - 21.5 50 4 26.0 - 26.5 ND 4 6.0 - 6.5 13,000 NA 11.0 - 11.5 33,000 NA 16.0 - 16.5 30 NA 6.0 - 6.5 35 NA 11.0 - 11.5 40 NA 16.0 - 16.5 45 NA 5 0.5 mg g = milligrams per kilogram (parts per million) = Method Detection Limit: = Non detected or above MDL = Not analyzed Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 18 Table No. 4 Analytical Results of Soil Sample Analyses Soil Borb~g No. 2 Sample Depth, 11.0-11.5 feet, BSG Concentrations, Constituent mq/kq MDL Antimony (Sb) ND 100 Arsenic (As) 2.2 0.5 Barium (Ba) 58 0.5 Beryllium (Be) 0.3 0.1 Cadmium (Cd) ND 1 Chromium (Cr) 6 1 Cobalt (Co) ND 5 Copper (Cu) 13 5 Lead (Pb) 7 0.5 Mercury (Hg) 0.6 0.1 Molybdenum (Mo) ND 20 Nickel (Ni) ND 5 Selenium (Se) ND 0.5 Silver (Ag) ND 3 Thallium (Ti) 4 1 Vanadium (V) 18 5 Zinc (Zn) 33 2 mg g = milligrams per kilogram (parts per million) = Method Detection Limit = Non detected or above MDL Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 19 6.0 EVALUATTON The analytical results of the soil sample analyses from this investigation and from a previous sampling event on February 9, 1988, were evaluated to determine the extent of petroleum product migration beneath the former underground waste oil storage tank location. In addition, the data obtained were evaluated to assess the potential environmental effects of the migration. Finally, the need for additional studies and remedial actions are discussed. The details of our evaluation are presented in the following subsections. 6.1 Extent of Petroleum Product Miqrat.io.n: An elevated concentration of oil and grease, 74,000 mg/kg at a depth of 6.5 feet BSG, was encountered in soil boring B-1 which was slant d~il]~d beneath the building. The concentration of oil and grease attenuated to 15 mg/kg at a depth of 11.5 feet BSG, and to 10 mg/kg at a depth of 21.5 feet BSG, the maximum depth explored in soil boring B-1. Elevated concentrations of oil and grease, 13,000 mg/kg at 6.5 feet BSG and 33,000 mg/kg at 11.5 feet BSG, were encountered in soil boring B-3 located at the center of the former tank location. The concentration of oil and grease attenuated to 30 mg/kg at a depth of 16.5 feet BSG. The analytical results of the soil samples retrieved from soil borings B-2 and B-4 revealed concentrations of Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 20 oil and grease less than 50 mg/kg. The analytical results of the soil sample analyses from a previous sampling event (during the tank removal operation) revealed elevated concentrations of oil and grease, 67,823 mg/kg at a depth of 2 feet below the piping (approximately 7 feet BSG). The oil and grease concentration attenuated to 1,428 mg/kg at a 'depth of 6 feet below the piping (approximately 11 feet BSG). No soil samples were taken below a depth of 11 feet BSG. Based on information provided by Mr. Joe Canas of the KCEHD and on our past experience with oil and grease constituents, naturally occurring concentratiOns of oil and grease in soils range from 10 mg/kg to 50 mg/kg. Thus, it would appear that the background levels of oil and grease occurring in the on-site soils are within naturally occurring ranges and that oil and grease concentrations detected in excess of 50 mg/kg are the result of petroleum product (waste oil) migration from the former underground tank. Based on the analytical results of the soil samples retrieved from the soil borings and from the previous sampling event, the known horizontal extent of soils containing elevated concentrations of oil and grease appears to be in a' circular area with a radius of about 6 feet centered on the former tank location. Given the granular nature of the on-site soils, it would be reasonable to assume that oil and grease migration has occurred in a vertical Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 21 direction asymmetrical around the vertical axis of the former tank location. The above data suggests that oil and grease may have migrated horizontally beneath the building located to the south of the.former tank. The estimated horizontal extent of the oil and grease migration is illustrated on Drawing No. 4. The vertical depth of soils containing elevated concentrations of oil and grease appears to be extending to a depth between 11.5 feet and 16.5 feet BSG, in the vicinity of the former tank location. In addition, the analytical results of the soil sample analyses from the previous sampling event indicate that the soils containing elevated concentrations of oil and grease exist to a depth of at least 11 feet BSG beneath the location of the former piping. The known vertical extent of oil and grease migration beneath the former tank is illustrated on Drawing No. 5. It is estimated that approximately 70 cubic yards of soil at the former tank location is affected. The volume of affected soi~l ~n~ath the former piping has not been determined. ~ : ~. 6.2 Potential Environmental Effects: The analytical results of the soil sample analyses from this investigation indicate that elevated concentrations of key petroleum constituents exist on-site beneath the former waste oil tank and piping to a depth of at least 11.5 feet BSG. Depth to groundwater is approximately 165 feet BSG. Fresno Modesto Visalia Bakersfield NORTH j PHOJFET TL 988-099-02 LEGEND y.~,SOIL BORING LOCATION FENCE FORMER TANK LOCATION FORMER PIPING LOCATION CAR LOT ASPHALTIC CONCRETE HORIZONTAL EXTENT OF PETROLEUM PRODUCT MIGR~TI~. A / / A BUILDING B-4 PLAN VIEW HORIZONTAL~EXTENT OF PE U P 2600 "H" STP~EET BAKERSFIELD, C~LIFORNIA s~,~cE ' ' IoA'E ]~.~..,. : .... ~":~0' I ,2-.=~-~0 The Twining DRAWN BY IAPPROVE0,1~Y: Inc. BM~ I "~ ~.auora,or, es, J DRAWING No -- J 4 of 5 FRES~/'MOO[STO/vISALIA.."~AK[RSFIELD PROJECT No L 'IL 988-099-02 1 ~,EOEND I [OTL & GREASE CONCF. NTRATTON, pi)mi (TOTAL LEAD CONCENTRATION,' ppm) ND = NON-DETECTABLE ZONE OF PETROLEUM MIGRATION HORIZONTAL SCALE: 1" = 10' VERTICAL SCALE: 1" = 6' ~ i FORMER TANK LOCATION BUILDING A D-z B-2 B-3 B-1 A' [35] [35] C- L ,[ 74,000 ] [45] __ [5]. ~30] (3)k 15ET --(4) [50! 2- ' ' ~[10] 20ET- [ND] 25FT (4) VERTICAL CROSS SECTIONAL VIEW VERTI~L EXTENT OF SC~L£ O~E ', PETROLEUM PRODUCT MIGRATION shown 2-:23-90 ~'~ The Twining VALLEY OLDSblOBILE FACILITY OR~WN ~_Y ~PPROVED BY: ~,,m ~ ~i~if~ Laboratories, Inc. 2600 "H" STREET DRAw~,G No -- BAKERSFIELD CALIFORNIA 5 of 5 'IT, 988-099-02 Page 22 The average annual rainfall in the region is approximately 6 inches. Because the site is located on an alluvial plain, no known subsurface fracture exist. In addition, no man-made conduits which would increase the potential for migration of petroleum products were identified during the investigation. The petroleum product in the on-site soils appears to be comprised of ~oil and grease as demonstrated by the analytical results of the soil sample analyses and the product history of the tank. Currently, no regulatory guidelines have been established for acceptable levels of oil and grease in soils. In light of the fact that the soils containing elevated concentrations of oil and grease at this site are separated from groundwater by a distance of approximately 150 feet, and the fact that oil and grease does not readily migrate in soils, there does' not appear to be an immediate threat to groundwater due to the oil and grease contamination at this site. The analytical results of the soil samples from this investigation and from the ]previous sampling event revealed detectable concentrations of total lead. Based on the evaluation of the results of these findings it becomes apparent that as the concentration of oil and grease increases the concentrations of detectable total lead increases proportionately. Thus, it may be Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 23 assumed that the soils which contain elevated oil and grease concentrations also contain elevated lead concentrations. The analytical results of the soil sample analyses from the previous sampling event revealed an oil and grease concentration of 67,823 mg/kg and a lead concentration of 59.0 mg/kg in soil sample No. 1, which was retrieved at a depth of 2 feet below the piping (7 feet BSG). The results of the analyses of soil sample No. 1 for total lead, were compared to the Total Threshold Limit Concentration (TTLC) of 1,000 mg/kg and the theoretical Soluble Threshold Limit Concentration (STLC) of 5 mg/1 (the theoretical STLC in mg/kg is 10 times greater than the STLC in mg/1), as outlined in the California Code of Regulations (CCR), Title 22, Chapter 30, Article 11, Section 66700. Given the concentrations of lead detected, the potential exists for the soluble concentrations of lead to exceed the STLC for this site, which would classify all or part of the affected on-site soils as hazardous waste in accordance with the CCR criteria for hazardous wastes. The analytical results of the soil sample retrieved from soil boring B-2 at a depth of 11.5 feet BSG revealed detectable amounts of arsenic, barium, beryllium, chromium, copper, lead, mercury, thallium, vanadium, and zinc. All of these metals were detected in concentrations below their applicable TTLC and STLC values designated by the California Code of Regulations for hazardous Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 24 wastes. 6.3 Additional Studies and Remedial Action: Three remedial action alternatives for the area beneath the former underground waste oil tank were evaluated on a preliminary basis: 1) no action, 2~ soil removal and disposal at a State certified landfill, and 3) in-situ remediation by biological methods. The no action remedial action alternative would involve leaving in-place soils containing elevated concentrations of petroleum product constituents and possibly hazardous levels of lead at the site. Regulatory agency approval would be required for this alternative. However, it is unlikely that this approval would be granted until a Waste Extraction Test (WET) is performed on the soils to determine if they contain hazardous levels of lead. It should also be noted that leaving the soils containing elevated concentrations of oil and grease in-place would not achieve a clean closure and thus may effect future marketability and use of the property. In light of these potential conditions, this alternative may not be feasible. The excavation and disposal at a State certified landfill remedial action alternative would involve physically removing the soils containing elevated concentrations of oil and grease and disposing of the contaminated soil at a State'certified landfill. Because oil and grease contamination probably exists-beneath the Fresno Modesto Visalia Bakersfield 988-099-02 Page 25 building located to the south of the former tank location it may not be possible to remove all of the contaminated soils without 'threat to the structural integrity of the building. However, it may be feasible to leave in-place a portion of the contaminated soils below the structure and still satisfactorily remediate this site. Considering the distance to groundwater below the effected area, the migration characteristics of oil and grease in soils, and the fact that this area will be protected by the structure from moisture intrusion, this alternative may be feasible. It is recommended, however, that in the event that the existing structure is removed that an additional study be conducted to determine the extent of any remaining oil and grease contamination. If this remedial action alternative is considered, it is recommended that a structural engineer be consulted to evaluate the risk to the structure that may exist as a result of the excavation required. Soils should be removed from thE: area indicated in Drawings Nos. 3 and 4 to an estimated depth of 12 to 15 feet BSG, or until all contaminated soil has been removed. The excavation could be achieved with a backhoe or similar equipment. Soil samples should be retrieved from the excavated area and analyzed to determine the soluble oil and grease and total lead. The in-situ remedial action alternative would involve leaving the in-place soils containing elevated concentrations of oil and Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 26 grease and remediating the affected area by introducing biological nutrients or cultures into the soils. This alternative would probably not be feasible for this site due to the small volume of soils involved and because the costs in'volved would probably outweigh those of the other alternatives proposed. In addition, this alternative is not feasible if it is deemed necessary for the soils to be remediated for hazardous levels of lead. The remedial action alternative should be selected after KCEHD has reviewed this report and provided comments on the report findings and the alternative remedial actions. A remedial action plan (RAP) should be prepared after a remedial action alternative is chosen. 7.0 CONCLUSIONS On the basis of the findings of this investigation, we present the following conclusions: 7.1 The soil profile at the site generally consists of silty sands and poorly graded sands to a depth of 26.5 feet BSG, the maximum depth explored. 7.2 The horizontal extent, of petroleum product migration is estimated to be located in a circular area centered on the former underground waste oil tank location with a radius of approximately 6 feet. 7.3 The vertical extent of petroleum product migration is estimated to extend to a depth of between 11.5 feet and 16.5 feet: BSG, beneath the former underground waste oil tank. Fresno Modesto Visalia Bakersfield 'iL 988-099-02 Page 27 7.4 7.5 7.6 7.7 7.8 7.9 Petroleum product may have migrated horizontally beneath the building located to the south of the former underground waste oil tank. The vertical extent of petroleum product migration beneath the location of the former piping located to the west of the former waste oil tank is estimated to extend to a depth of at least 11 feet BSG. The affected soils may contain hazardous levels of lead which could restrict the method of remediation. The soils containing elevated levels of oil and grease and lead are separated from groundwater by approximately 150 feet BSG. It is unlikely that groundwater has been impacted by the petroleum product migration from the former waste oil tank. The excavation andl disposal remedial action alternative would appear to be the most feasible. 8.0 RECOMMENDATIONS: On the basis of our evaluation of the' field and laboratory data, we present the following recommendations. 8.1 A copy of this report should be submitted to the KCEHD for their review. 8.2 After review of this report by the KCEHD, a remediation option should be selected and a remedial action plan (RAP) should be developed to address procedures and requirements for the remedial action. Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 28 8.3 An additional investigation should be conducted to determine the soluble concentrations of lead in the affected soils by the waste extraction method as outlined in the California Code of Regulations, Title 22. 9~0 LIMITATIONS The conclusions and recommendations presented in this report are based on the assumption that the soil and groundwater conditions and the chemical concentrations do not deviate from those disclosed in our published literature study, subsurface exploration and laboratory testing. If variations from our findings or undesirable conditions are found, The Twining Laboratories, Inc. should be notified so that supplemental conclusions and recommendations could be given. This report is provided with the understanding that it is the responsibility of the owner to transmit the information and recommendations of this report to the appropriate regulatory agencies. The conclusions and recommendations contained in this report are solely professional ()pinions derived in accordance with current standards of professional practice. The professional staff of The Twining Laboratories, Inc. strive to perform their services in a properly and professional manner with reasonable care and competence but are not infallible. We understand that there are risks of earth movement and property Fresno Modesto Visalia Bakersfield TL 988-099-02 Page 29 damage inherent in remedial actions of soil and groundwater contamination. We are unable to eliminate all risks; therefore, we are unable to guarantee or warrant the results of our work. 10.0 CLOSING We appreciate the opportunity to be of service to you on this project. If you should have any questions regarding the information contained herein, please do not hesitate to contact our office. Sincerely, THE TWINING LABORATORIES, INC. Bruce M. Blythe Staff Geologist/Bakersfield Office Harry D. Moore, RCE, RGE Vice-President/General Manager BMB/HDM/km 4c: herewith Fresno Modesto Visalia Bakersfield