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Water and Soil Sampling with Analysis
LABORATORIES, INC. February 25, 1997 GAP.Y PEST-ANA PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLnCE SUITE d40 SAN JOSE, CA 95110 Subject: Laboratory Submission No.: 97-01313 Samples Received: 02/04/97 Dear Mr. Pestana: The samples(s) listed on the Chain of Custodv repert were received by BC Laboratories, Inc. on 02/M/97. Enclosed please find the analytical data for the testing requested. If you have anv questions regarding this report please ccc tact me. at (805)327-4911, ext. 250. Anv unused sample will be stored on our premises for a minimum of 30 days (excludina bacterlolo_lcals) at which time --hey will be dis-cosed u.,less `h=zw- se recuested at the time o- sample receipt. A disposal --fee of $5 per sample may aDTDly for solid sam-ole matrices. Please refer to submission number 97-01313 when c.11_ng for assistance ,.incerely, U/V'00"wr-')k Project Manager.' BC Laboratories, Inc_;_i �Ss '�7r+',i �•i tisr "mod �-4 4100 Atlas Ct. • Bakersfield, CA 93306 - (605) 327-491 1 - FAX (805) 327-1 918 !u aIJg - � uju 6o!2 egeo -algM ) T CC) § C) � \ � } � \ cz § CL G m % 7 \ / \ E / ƒ 4 � \ / \ — 2 \ g g E \ S m G @ k / CO � � $ j ClG \ M \ < \ / � a o ƒ : y 8 \ \ L $ - 3 6 3 UL— : LE � % � \ CL k 0 ƒ g / § CL E f k g Cl) g / k / 0 0 / % / I a E / e 0 \ O Cl. � (Dm EE // a) R 2 % ° = k \2 CU ƒ k R2 CT /$ 0 2 Cl o §Z *n CO Cl. tm kE e=2 >S_ @ 0 § k / / / 0 C) a) a)/ 0 CL a) »§% k § k t /§ƒ \-£ E CD c q> "0 / ¢ AB NU_BER�-1313 TIME RECEIVED: (v•. DATE RECEIVE D:2 a— 9'L I KtLtivtu csY; SHIPPING SPECIFICATIONS SHIPPING CONTAINER ade.ral Express ❑ UPS ❑ Hand Delivery ❑ Ice Chest Box ID IC Lab, Feld Service Other ❑ (Specify) None O Other ❑ (Specify) SAMPLE CONDITION :e Chart 10 . ml7af at LtYe --C Ica ❑ Ica Chart ID Ica Chart ID Ice Chen ID Ica Chart ID Ice Chest ID _- Temperature eC' Temperature eC Temperature 'j Temperature eC Temoarrtu►e Blue Ice None ❑ If temperature is not between 2 and 6 OC please explain: '.ustody Seals: Ice Chest 0 all samples received? Yes Containers ❑ None No ❑ All samples intact? Ye No O Description match COC7 Yes,�—'- No SAMPLE CONTAINERS Sample i j 1 I 2 I 7 • I L e 7 a a I le 11 12 U I 1a n + la I " i �• I ,• _ ,T GENERAL MINERAIJ GENERAL PHYSICAL I T PE UNPRESERVED :T INORGANIC CHEMICAL METALS 'T INORGANIC CHEMICAL METALS I I I { I I I I I I 'T CYANIDE -T NITROGEN FORMS I { I I { I I I I I 'T TOTAL SULFIDE :cz. NITRATE I NITRiTP 00mI TOTAL ORGANIC CARBON 1T TOX 7T ^NEMICAL OXYGEN DEMAND I I { I I I I !00ml PHENOLICS I I { I I I I I t0ml VOA VIAL TRAVEL BLANK :oml VOA -VIAL I I JOA SET (3 VIALS. 1TB) = EPA 413.1. 413.2. 418.1 I ) I I I I I I I 2T ODOR I I I II I I RADIOLOGICAL iACTERIOLOGiCAL ?T EPA 504 CT EPA 508/60818080 I { { I { I I I I CT EPA 515.118150 CT EPA 525 .Z.T EPA SZ5 TRAVEL BLANK ICOMIEPA 547 1 00m1 EPA 531.1 I I { I { { { I I I I I I I 2' EPA 548 I I I I { I ^T EPA 549 CT EPA 632 CF EPA 8015M OT =Cc { I I I I { i I I i ! I I CT AMBER I I I I I I I I I I 8 07. JAR I I I { I { _2 oz. JAR SOiL SLEEVE °CB VIAL PLASTIC SAG • � { I I I I { I i I I I I I I I I i I I I IF:IWP6010ATA%DOCS%SHE3LAH\FORMSISAMFRE-- T LABORATORIES WATER ANALYSIS (GENERAL CHEMISTRY) Page 1 PACIFIC ENVIRONMENTAL GROUP, INC. Date Reported: 02/12/97 2025 GATEWAY PLACE Date Received: 02/04/97 SUITE 440 Laboratory No.: 97-01313-1 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 Sample Description: UNOCAL SS 6293 @ 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Sampling Date/Time: 02/04/97 Date Date DiLution Constituents Results Units P.Q.L. Method Prepared AnaLyzed Factor pH 8.04 pH Units EPA-9040 02/05/97 02/05/97 1 P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte quantifiable based on sample size used and analytical technique employed). Marna Atencio Department Supervisor All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330E • (BO5) 327-491 1 • FAX (BO5) 327-1 91 B LABORATORIES PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 WATER ANALYSIS (GENERAL CHEMISTRY) Date Reported: 02/14/97 Date Received: 02/04/97 Laboratory No.: 97-01313-1 Page 1 Attn: GARY PESTANA 408-441-7500 Sample Description: UNOCAL SS 6293 Q 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Sampling Date/Time: 02/04/97 Constituents Total Dissolved Solids a 180 C Date Date Dilution Results Units P.Q.L. Method Prepared Analyzed Factor 222. mg/L 10. EPA-160.1 02/10/97 02/10/97 1 P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte quantifiable based on sample size used and analytical technique employed)_ t Marna Atencio Department Supervisor All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third parry interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330E • [B05) 327-491 1 • FAX [B05) 327-1 91 B —M LABORATORIES CHEMICAL ANALYSIS Page 1 PACIFIC ENVIRONMENTAL GROUP, INC. Date Reported: 02/13/97 2025 GATEWAY PLACE Date Received: 02/04/97 SUITE 440 Laboratory No.: 97-01313-1 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 Sample Description: UNOCAL SS 6293 @ 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Sampling Date/Time: 02/04/97 Title 22 Waste Type: Liquid with < 0.5 °s Solids Method Date Date Dilution Constituents Sample Results Units P.Q.L. Method Prepared Apalyzeri Factor Pensky-Marten Flash Point > 180. F 20. SW-1010 02/12/97 02/12/97 1 P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte quantifiable based on sample size used and analytical technique employed). REFERENCES: SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. � 1 Dan Schu tz Laboratory Director All results listed In this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • (B05) 327-491 1 • FAX (805) 327-1 91 B --m LABORATORIES CHEMICAL ANALYSIS PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 Date Reported: 02/12/97 Date Received: 02/04/97 Laboratory No.: 97-01313-1 Page 1 Sample Description: UNOCAL SS 6293 @ 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Sampling Date/Time: 02/04/97 Constituents Reactive Sulfide Reactive Cyanide Method Date Date Dilution Sample Results Units P.Q.L. Method Prepared Analyzed Factor Non -Reactive mg/kg 50. SW-7.3.4.2 02/10/97 02/10/97 1 * Non -Reactive mg/kg 1.0 EPA-9012 02/10/97 02/10/97 1 P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte quantifiable based on sample size used and analytical technique employed). REFERENCES: EPA = "Methods for Chemical Analysis of Water and Wastes", EPA-600, /4-79-020. SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. Flag Explanations: * = Based on Total Cyanide results. t� c� Dan Schultz Laboratory Director All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party Interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • [B05) 327-491 1 • FAX [B05) 327-1 91 B LABORATORIES TOTAL CONCENTRATIONS (California Code of Regulations, Title 22, Section 6626'1) PACIFIC ENVIRONMENTAL GROUP, INC. Date Reported: 02/13/9-7 2025 GATEWAY PLACE Date Received_ 02/04/97 SUITE 440 Laboratory No.: 97-01313-1 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 Page 1 Sample Description: UNOCAL SS 6293 Q 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Title 22 Waste Type: Liquid with < 0.5 °s Solids Regulatory Criteria Method Date Date Dilution STLC TTLC Constituents Sample Results Units P.Q.L. Method Prepared Analyzed Factor m L mg/kg Antimony None Detected mg/L 1.0 SW-6010 02/07/97 02/07/97 1. 15. 500. Arsenic None Detected mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 5.0 500. Barium 0.32 mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 100. 10000. Beryllium None Detected mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 0.75 75. Cadmium None Detected mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 1.0 100. Chromium 0.12 mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 560. 2500. Cobalt None Detected mg/L 0.5 SW-6010 02/07/97 02/07/97 1. 80. 8000. Copper None Detected mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 25. 2500. Lead None Detected mg/L 0.5 SW-6010 02/07/97 02/07/97 1. 5.0 1000. Mercury None Detected mg/L 0.02 SW-7471 02/10/97 02/11/97 25. 0.2 20. Molybdenum None Detected mg/L 0.5 SW-6010 02/07/97 02/07/97 1. 350. 3500.' Nickel None Detected mg/L 0.5 SW-6010 02/07/97 02/07/97 1. 20. 2000. Selenium None Detected mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 1.0 100. Silver None Detected mg/L 0.2 SW-6010 02/07/97 02/07/97 1. 5.0 500. Thallium None Detected mg/L 1.0 SW-6010 02/07/97 02/07/97 1. 7.0 700. Vanadium 0.14 mg/L 0.1 SW-6010 02/07/97 02/07/97 1. 24. 2400. Zinc None Detected mg/L 0.5 SW-6010 02/07/97 02/07/97 1. 250. 5000. Comment: All above constituents are reported on an as received (wet) sample basis. Results reported represent totals (TTLC) as sample subjected to appropriate techniques to determine total levels. P.Q.L. = Practical Quantitation Limit (refers to the least amount of analyte quantifiable based on sample size used and analytical technique employed). STLC = Soluble Threshold Limit Concentration TTLC = Total Threshold Limit Concentration REFERENCES: SW = "Test Methods for Evaluating Solid Wastes Physical/Chemical Methods", EPA-SW-846, September, 1986. - Dan Schultz Laboratory Director All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • CB05) 327-491 1 • FAX (B05) 327-1 51 B LABORATORIES Page Purgeable Aromatics and Total Petroleum Hydrocarbons PACIFIC ENVIRONMENTAL GROUP, INC. Date -Reported: 02/07/97 2025 GATEWAY PLACE Date Received: 02/04/97 SUITE 440 Laboratory No.: 97-01313-1 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 1 Sample Description: UNOCAL SS 6293 Q 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR Sample Matrix: Water Date Collected: 02/04/97 Date Extracted-8020: 02/05/97 Date Analyzed-8020: 02/05/97 Dilution Used-8020: 5 Date Extracted-8015M(g): 02/05/97 Date Analyzed-8015M(g): 02/05/97 Dilution Used-8015M(g): 5 Practical Analysis Reporting Quantitation Constituents Results Units Limit Methyl-t-butylether 140. µg/L 2. Benzene None Detected µg/L 0.5 Toluene None Detected µg/L 0.5 Ethyl Benzene None Detected µg/L 0.5 Total Xylenes None Detected µg/L 1. Total Petroleum Hydrocarbons (gas) 140. µg/L 90. Surrogate %s Recovery 83. % 70-130 TEST METHOD: TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Note: Sample chromatogram not typical of gasoline. PQL's were raised due to high concentration of target analytes requiring sample dilution. TPH Gas positive due to one large peak at begining of TPH Gas range. California D.O.H.S. Cert. #1186 Stuart G. uttram Department Supervisor All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330E • [805] 327-491 1 • FAX [605] 327-1 91 B :M LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01313-1 Date of Report: 02/12/97 Sample Matrix: WATER j Method ISpike %Recl PrecisionjLCS % Rec II Blank I I MS ' MSD ISpike I LCS I Control. I Control, I Control lConstituents Readings (Units I% Rec 1% Rec IR.P.D.1% Rec I Limits I Limits Limits 11 I u npH, pH Units INA INA INA INA INA I100. NAi NAI 98-102u MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference LCS = Laboratory Control Sample Quality Control Officer Anthony Bonanno All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • (13O5) 327-491 1 • FAX (B05) 327-1 91 B :M LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01313-1 Date of Report: 02/14/97 Sample Matrix: WATER 0 Method iSpike %Recl PrecisionlLCS % Rec Blank I I MS I MSD ISpike 1 LCS I Control I Control I Control n Constituents I Readings (Units I% Rec I% Rec IR.P.D.I% Rec I Limits Limits I Limits M n �JTDS is 180 C I <10. Img/L INA INA INA 199. I NAI NA 90-1101 MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference LCS = Laboratory Control Sample NA = Not Applicable Quality Control Officer Anthony Bonanno All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330E • (805) 327-491 1 • FAX (605) 327-1 91 6 LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT STANDARD TTLC REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01313-1 Date of Report: 02/12/97 Sample Matrix: WATER pI Method I I I (Spike %Recl PrecisionlLCS % Rec II Blank I MS I MSD (Spike I LCS I Control I Control I Control II IIConstituents I Readings lunits I% Rec I% Rec IR.P.D.I% Rec I Limits I Limits I Limits II IlReactive CN I < 1.0 _Img/kg 1103. j105. 1 2. 003. I 80-120I 201 88-1151 IlReactive S-- f <20. Img/kg INA INA INA 170. I NAI NAI >50II MS = Matrix Spike; MSD = Matrix Spike_ Duplicate; LCS = Laboratory Control Sample * Results for Cyanide based on Total Cyanide. RPD = Relative Percent Difference Quality Control Officer Anthony Ironanno All results listed In this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 93308 • (1305) 327-491 1 • FAX (B05) 327-1 91 B LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01313 - 1 Date of Report: 02/19/97 Sample Matrix: gConstituents Method 1 Blank I Readings I l lUnits I I MS 1% Rec I I MSD 1% Rec I (Spike I LCS IR.P.D.1% Rec Spike %Recl I Control I I Limits 1 PrecisionjLCS Control Limits % Rec I Control II I Limits �Antiman < 0.1 m L 41. 1 38, 1 9. 190. 80-1201 201 80-120u gArsenic < 0.1 --1mqjL 85. 86. 1 1. 1 86. 1 80-1201 201 80-120� uBarium I < 0.1 m L 191. 92. 1 0. 1100. 1 80-1201 201 80-120q lBer llium I < 0.1 m L 1 91. 91. 1 1. 1 98. 80-1201 201 80-1201 Cadmium < 0.1 m L 1 90. 1 93. 3. 1101. 80-120 201 80-1201 gChromium I < 0.1 L 1 92. 1107. 13. 1101. 1 80-1201 201 80-120� uCobatt I < 0.5 m L 1 90_ 1 93. 1 3. 1100. 1 80-1201 201 80-120� 11copper I < 0.1 L j 96. 1102. 1 6. 1 93. 1 80-1201 201 80-120� Lead < 0.5 L 1 85. 1 88. 1 4. 1 93. 1 80-1201 201 80-1201 jMercur < 0.02 1 m L 1 94. 1 97. 3. 1 95. 1 80-1201 201 80-120 Mol Wenum < 0.5 m L 1 86. 1 86. 0. 1 94. 1 80-12DI 201 80-120� (Nickel < 0.5 L 88. 1 94. 1 5. 1 96. 1 80-1201 201 80-ig Selenium < 0.1 m L 86. 1 81. 1 6. 1 87. 1 80-1201 201 80-120II Silver I < 0.2 1 m L 94. 1 93. 1. 97. 80-1201 20 80-120� dThallium I < 1.0 Ims/L l_95. 1 96. 1. 198. j 80-1201 201 80-1201 1Vanadiurn 1 < 0.1 ms/L 197. 1 98. 1 1. 1101. 1 80-1201 201 80-1201 NZinc < 0.5 Img/L l 87. 1 93. 1 4. 198. I 80-120I 201 80-1200 MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference LCS = Laboratory Control Sample Quality 6ntrot Officer Anthony a` All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B - [BO5] 327-491 1 - FAX [BO5] 327-1 91 B M. LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01313 - 1 Date of Report: 02/18/97 Sample Matrix: WATER Method I 1 l I ISpike %Recl PrecisionlLCS % Rec Blank I MS I MSD ISpike I LCS I Control I Control I Control 11constituents I Readings (Units I% Rec I% Rec IR.P.D.I% Rec I Limits I Limits I Limits II JIBenxene < 0.3 1u.9/L 199. 194. I 5. 1108. I 80-1201 101 85-1151 ITofuene 1 < 0.3 Irr.9/L 1 95. 1 90. 1 5. 1106. 1 80-1201 101 85-1150 jEthyl Benzene I < 0.3 lug/I. 195. 1 94. 1 1. 1106. I 813-1201 101 85-115� JIMethyi-t-buty_lether 1 < 0.3 lu.a/L 1 98. -1. 91. 1 7. 1108. 1 80-1201 101 85-1151 IlTotal Petroleum II Hydrocarbons (gas) I 1 <50.. I I&Q/L I _ 1 95._ I 1 99_I I 4. I I 198. 1 80-1201 I I 101 I 85-115II Ip&m-xylenes I < 0.6 _IuSZL 1 98. 1 97. 1 1. 1109. 1 80-1201 10I 85-115II IIo-Xylenes I < 0.3 Iwg/L 198. 198. I 0. 1111. I 80-120I 101 85-115u MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference LCS = Laboratory Control Sample Quality Contr❑ Officer r- Anth 9 onanno All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • (B05) 327-491 1 - FAX (BO5) 327-1 91 B -M LABORATORIES PACIFIC ENVIRONMENTAL GROUP, INC. Date Reported: 02/13/97 2025 GATEWAY PLACE Date Received: 02/04/97 SUITE 440 Laboratory No: 97-01313 SAN JOSE, CA 95110 ATTN: GARY PESTANA 408-441-7500 Sample Descriptions: 97-01313-1 UNOCAL SS 6293 @ 363 SANTA ROSA ST, SLO: GW-1 SAMPLED BY MARK KUNCIR. Sampling Date: 02/04/97 Attached are the results for the Fish Bioassay. t Page 1 All results listed In this report are for the exclusive use of the submitting party. BC Uboratorles, Inc. assumes no responsibility for report alteration, separation, detachment or third party Interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330E • (805) 327-491 1 • FAX (B05) 327-1 91 6 , LABORATORY REPORT Date: February 11, 1997 Client: BC Laboratories 4100 Atlas Court Bakersfield, CA 93308 Attn: C. Ferguson Laboratory No.: A-97020602-001 Sample I.D.: 97-01313-1 A, 4 n Testing QC Laboratories "dedicated to providing quality aquatic toxicity testing" 4350 Transport Street, Unit 107 Ventura, CA 93003 (805) 650-0546 FAX (805) 650-0756 CA DOHS ELAP Cert. No.: 1775 Sample Control: The samples were received by ATL in a chilled state, with the chain of custody record attached. Date Sampled: 02/04/97 Date Received: 02/06/97 Dates Tested: 02/06/97 - 02/11/97 Sample Analysis: The following analyses were performed on your sample: CCR Title 22 - Fathead Minnow Hazardous Waste Screen Bioassay. Attached are the test data generated from the analysis of your sample. Result Summary: ATL Lab No. Sample 1D. A-97020602-001 97-01313-1 Quality Control: Reviewed and approved by: Results PASSED (LC50 > 750 mg/1) /eph A. LeMay, Laboratory Director Thank you for your business! 4_ . This report pertains only to the samples investigated and does not necessarily apply to other apparently identical or similar materials. This report is submitted for the exclusive use of the client to whom it is addressed. Any reproduction of this report or use of the Laboratory's name for advertising or publicity purpose without authorization is prohibited. FATHEAD MINNOW HAZARDOUS WASTE , SCREEN BIOASSAY a Lab No.: �r}?OaDC�f�-cs0 I. Client/ID: .6G TEST SUMMARY Species: Pimephales promelas. Source: Fish length. (gun) . av: O ; min: 28 ; max: 3/ Date fish received: -•/T--1; 7 Fish weight (gm): av:,37 ; min: 32 ; max; . Regulations: CCR Title 22. Test Protocol: Calif. F&G/DOHS 1988. Endpoints: LC50 at 96 hrs. Test type: Static. Terperature: 20 +/- 2°C. Test chamber volume 10 1. Number of replicates: 2. Mixing method: Mechanical shaking. Number of fish per chamber: 10. Acclimation/dilution water: Reconstituted soft water (hardness 40-48 mg/l Ca Aeration: Single rubble through narrow -bore tube. �)� QA/QC Batch No. 7 02 TEST DATA IN=AL 24 Hr 48 Hr 72 Hr 96 Hr ATE/TIME Fr- 17 7 - ti- 6 -7 C13 ASALYST : ° C m I7H ° C I m pHPr-1DF C } pH r D I-C IDO pHI—Foc DO pHFi i COhT A -Zi7 � CONT B �� �jQ 1 r l�/.7c/ U�•Y%�� �1.7 7611 IF, :7 I;P? o 400 A f�,"� .LI79I C ' D .g q I oho $2 7- I v l i, 401 B 4 5,7y� �ai J i F i �6 c 1^O 7_ v Gp 0�( 7� 750 A 750 B ��•�lr3�� �.S .j�i.g ��f �vk 7 comments: I ��/�OiB, V ��77 Total Number Dead CONTROL v /20 400 mg/1 0 /20 750 mg/1ILO /20 RESULTS HI� CONCJ Alk. I Hard 0 hri !i(u 96hr I x 1 PPSSID LC50 > 750 mg/1 (<40% dead in 750 mr/l cone ) L — rAILFD >40o dead in 750 (Definitive Test Recommended) =31=7LC50 < 400 mg/l (>60% dead in 400 mg/1 conc.) FROM 02.06.1997 08:09 NO. 1 P. 2 irLABORATORIES. INC. 4(80)327- Court 911-FAXBake805), 2 9330d CHAINOFCUSTODY 1 (805} 327-4911 FAX (805 3�7-1918 � (7 0 m 3 �' A) � -0 � > R cn n `� A Z w CD t�7� 3 N I ` m m (D 5 �S z 70 I � i � � Ji„i J "— - � • -- O m co a a z w J atCD 1 , C CAS 1 O� 3 `. CD( a+o CDkv , CD s Cn �.. fl iv S I M 5 o 3. rn I lal C Matrix (S) Soil (SQ Sludge (W) Water (other) 3 I I i I _, S D CZ. a G. m 5.I { I I I I a a a Q. Cr Cr � >1 I I w d m n�i '� tom,• �, c c c c c c N I Ilfl �I Vp� � A I i CD I I I ff A O C• W iI Q.' I I !�D a M a N a fp 0. V c Q N eQ an oo_n �a e c c c c Samples rec. cold (y/n) Custody Seals (y/n) Results Needed by: I O Date & Time I v 0 m v 0 0 t Number and 3 3 3 3 3 Container Type ,NS V C 1 •'LABORATORIES, INC. February 25, 1997 GAPY PESTANA PACIFIC ENVIRONMENTAL GROUP, T-NC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 Subject: Laboratory Submission No.: 97-01373 Samples Deceived: 02/05/97 Dear Mr. Pestana: The samples(s) listed on the Chain of Custody report were received by 3C Laboratories, Inc. on 02/05/97. Enclosed please find the analytical data fcr the testing requested. if you have any questions regarding this report please contact me at (805)327-4911, ext. 250. =nv unused sample will .^.e stored on our premises -.._ a minimwn of 30 ways (excluding bacteriolcal'calS) at which time Lhev will be dis-oosed unless C� Rrwise reauested at the time ofsa*nple receipt. n disposal fee of $5 per sample may apply for solid sample matrices -lease refer to submiss_= _number 97-01373 when call_::: for ass_St_ncevw Project Manager 3C Laboratories, Inc. 4100 Atlas Ct. • Bakersfield, CA 93308 • [8O5) 327-491 1 • FAX [605) 327-1 91 B luallO - Wd tiojejogej - MolleA /Jopeaoge-j - a114M CD- C g O co N % CA CD N N • a) co E 3.> N J O . � U IN co v 0 m rn a U L J O 0 5 AD `cn `° a Z J co > C Q c w i p N T ro c4i co U) co o avi �p ) - s o p ai 'p � -•y � 0)_ CO � L N T Z J a)co (o 7rr C.)U U co `n m o O > o Z a) ,. C3 Y .. a CC (l] O co o ` N -:R; 0 0 a) a 0 E o� v a co 3 U n '3 m c o \ 3 co • C Q • O \1 U CO Q U F- > m N o U) in Cl) M m a' ) Q 0 U) U cad LL ` cn L Co Y 7 O X i o O O = ."� y � co D • co ao °' co N N N \ co ❑ O r (q to E L co >. >+ a t p 0 0 m e o) cm \ 1 c) 0 U % U) c*) c R EC a) vZ c U E zz C U) O 0 U \ L l0 E >` O O L J 0 Q Co- Ir I F- � 1 c�i 1 6" v 1 L6 1 <o 1 r� 1 6 1 of I o A MEN Im E E p i= ui I 0 m m L L M A C C cc cc O Z 0 co a� cl- c O C O U 0 0 O C v 0 U O O a) a ca U a) a) Co CD C E y � C O co O E C CD w CL tL � o L ca 3 3 co °c 3 w o O c Z � Q co (Do cl a >- (Q t+ C- °a E ai 0 :3 C Cn o (n U c 0 cv L N U a) s Cr Y c a) � C O O C ` co L 0 : 3 zz r v CD U a) co c cn 0. O O co a) CD Earn U 3: 3: a) > a7TN°O O O- Q AB NUMBER: en -17 -13 E TIME RECEIVED: DATE RECi=1VED: n 5/�7 I Ktutivtu tiYv SHIPPING SPECIFICATIONS SHIPPING CONTAINER ede'ral Express ❑ UPS ❑ Hand Delivery ❑ Ice Chest ,� Box ❑ C Lab Field Service `ems' Other ❑ (Specify) None O Other ❑ (Specify) SAMPLE CONDITION :e Ch■rt ID . lea Chart ID • lea Cheat ID a Ice Chart ID n{� Ica Cheat 10 I lee Cheat ID empar+tur■ S C Temperetur+ C Temperature C Temperature T■mp■ratur■ eC Temoerrture--------. Ice ❑ Blue Ice ' None 0 If temperature is not between 2 and 6 OC please explain: ;ustody Seals: Ice Chest Containers 0 None ❑ III samples received? Yes No ❑ All samples intact? Yeti No ❑ Description match CDC7 YeJ ,22 No SAMPLE CONTAINERS Sampler { 2 + • e a 7 I t It 10 I 11 I 12 I is I u, 16 17 Is I 'I _ T GENERAL MINERAU GENERAL PHYSICAL +I I� +I T PE UNPRESERVED I I } { I { { { I f I T INORGANIC CHEMICAL METALS { { I { I I I I I I I I { { { { { { { { { I I I I { I I T INORGANIC CHEMICAL METALS f T CYANIDE I I 1 { { { I I { I { ! T NITROGEN FORMS T TOTAL SULFIDE I { { I I I I + I I I I I at. NITRATE 1 NITRITE OOmI TOTAL ORGANIC CARBON I { I { { { { I I I { I I I l IT TOX I I { I { { I I I I I I T 'HEMICAL OXYGEN DEMAND { I { I { I { I I { OOmi PHENOLICS I I { { { { I I { I I I Oml VOA VIAL TRAVEL BLANK { I I { { I I I I 1 •0ml VOA -VIAL { I { { { { I { I I 'CA SET 13 VIALS. ITS) { I { I I I I I 1 :T EPA 413.1. 413.2. 418.1 { I I I { I { I I I 'T ODOR I { I + + { { I I I I I I :ADIOLCG:CAL ;ACTERIOLOGICAL I I { f { { { M ! I I { I I 'T EPA 504 I I { { { { { I 1 I 2T EPA 508/60818080 { I f { { I I I I ?T EPA 515.1/8150 { { { I { { ! 2T EPA 525 { I { { { f { I { { I I 2T EPA 525 TRAVEL BLANK f I f I I } { { I I { I I 1 OOmi EPA 647 I I I I { { f I I I ! { { I I I I I I 100m1 EPA 531.1 I 2T EPA 548 2T EPA 549 1 I I I { { I I I I aT EPA 632 I 1 I 2 EPA 8015M I { { I I I I I I I I I I I f 2T aA Iac I I I I I f I I I ! I ! 2T AMBER I I I I I { { I I I I I I 3 02. JAR { { I I I I I 1 { ?Z OZ. JAR I { { { { { I I I + 1 I I 1 SOIL SLEEVE I "CE VIAL °LASTIC SAG I I I I I I { I I I I I I I � I I I I I I I � I I I I I l i I I I I I I I I I f { I I I I l l l l f l l l l l l am-erttr: A �mei—a �,v I IF:1WPSDIDATAIDOCSISHEILAHTFORMSISAMRE�- UB Y AI:� �- Purgeable Aromatics and Total Petroleum Hydrocarbons PACIFIC ENVIRONMENTAL GROUP, INC. Date Reported: 02/07/97 2025 GATEWAY PLACE Date Received: 02/05/97 SUITE 440 Laboratory No.: 97-01373-1 SAN JOSE, CA 95110 Attn: GARY PESTANA 408-441-7500 Page 1 Sample Description: UNOCAL SS 6293 @ 363 SANTA ROSA ST, SLO: GW-2 SAMPLED BY MARK K Sample Matrix: Water Date Collected: 02/05/97 Date Extracted-8020: 04/05/97 Date Analyzed-8020: 04/05/97 Dilution Used-8020: 200 Date Extracted-8015M(g): 04/05/97 Date Analyzed-8015M(g): 04/05/97 Dilution Used-8015M(g): 200 Practical Analysis Reporting Quantitation Constituents Results Units Limit Methyl-t-butylether 3300. µg/L 60. Benzene 33. µg/L 3. Toluene 170. µg/L 3. Ethyl Benzene 7.8 µg/L 3. Total Xylenes 140. µg/L 6. Total Petroleum Hydrocarbons (gas) 2400. µg/L 500. Surrogate °s Recovery 101. °s 70-130 TEST METHOD: -TPH by D.O.H.S. / L.U.F.T. Manual Method - Modified EPA 8015 Individual constituents by EPA Method 5030/8020. Note: Sample received at pH = 7. PQL's were raised due to high concentration of target analytes requiring sample dilution. California D.O.H.S. Cert. #1186 Stuart G_ Buttram Department Supervisor All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. - Bakersfield, CA 9330B • [805) 327-491 1 • FAX [B05) 327-1 91 B T LABORATORIES B C LABORATORIES QUALITY CONTROL REPORT PACIFIC ENVIRONMENTAL GROUP, INC. 2025 GATEWAY PLACE SUITE 440 SAN JOSE, CA 95110 GARY PESTANA Samples Affected: 97-01373-1 Date of Report: 02/12/97 Sample Matrix: WATER Spike %Recl PrecisionILCS % Rec 11 Method i u I Blank MS I MSD (Spike I LCS i Control I Control I Control II iconstituents I Readings ]Units I% Rec I% Rec IR.P.D.I% Rec j Limits I Limits I Limits II iMeth t-t-but tether < 0.3 1 L 1 98. 1 91. 1 7. 1108. 1 80-120 101 85-1151 ISenzene < 0.3 c L 99. 1 94. 1 5. 108. 80-120 10 85-115I Toluene < 0.3 L 95. 90. 5. 1106, 1 80-1201 101 85-1151 jEth t Benzene (Total Petroleum I H rocarbons as I < 0.3 I <50. IuRIL I IjLgZL 1 95. I 95. 1 94. j 1 99. J 1. I 4. J106. 1 I I 1 98, 1 80-1201 I BD-1201 101 I 101 85- 151 II 85-1151 +m-X lene < 0.6 L 98. 1 97. 1. 1109. 1 80-1201 101 85-1151 IIo-Xylene I < 0.3 Iµg/L 198. 198. 1 0. 1111. 1 80-120I 101 85-1151 MS = Matrix Spike; MSD = Matrix Spike Duplicate; RPD = Relative Percent Difference LCS = Laboratory Control Sample QualityCo tr l Officer Anthony,/8onanno v All results listed in this report are for the exclusive use of the submitting party. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. 4100 Atlas Ct. • Bakersfield, CA 9330B • (B053 327-491 1 • FAX (B05) 327-1 81 6 KAPREALIAN ENGINEERING, INC. �( Consulting Engineers P.O. BOX 996 . BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 • FAX: (707) 746-5581 KEI-J90-0501.R2 May 14, 1990 Unocal Corporation 2000 Crow Canyon Place, Suite 400 San Ramon, CA 94583 Attention: Mr. Ron Bock RE: Stockpiled Soil Sampling for Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California Dear Mr. Bock: This letter report summarizes the results of the stockpiled soil sampling and laboratory analyses for the referenced site. The soil analyses were conducted to comply with the County Health Department requirements for proper disposal of contaminated soil. On May 2, 1990, soil samples from approximately 450 cubic yards of stockpiled soil at the referenced site were collected to determine proper disposal of the soil. Nine composite soil samples (designated as Comp A, Comp B, Comp C, Comp D, Comp E, Comp F, Comp G, Comp H, and Comp I) were taken. Each composite sample consisted of four individual grab samples taken at various locations and depths ranging from 1 to 2 feet. The samples were collected in two-inch diameter, clean brass tubes, which were then sealed with aluminum foil, plastic caps and tape, and placed in a cooled ice chest for subsequent delivery to a certified laboratory for analysis. All samples were analyzed at Sequoia Analytical in Redwood City, California, and were accompanied by properly executed Chain of Custody documentation. Sample locations are as shown on the attached Site Plan. Soil samples were analyzed to determine concentrations of total petroleum hydrocarbons (TPH) as gasoline using EPA method 5030 in conjunction with modified 8015, benzene, toluene, xylenes and ethylbenzene using EPA method 8020, and organic lead using the California LUFT Manual method. Analytical results of the soil samples indicate levels of TPH as gasoline ranging from 77 ppm to 800 ppm. However, analytical results of the soil samples indicate non -detectable levels of organic lead for all samples. Results of the soil analyses are summarized in Table 1. Copies of the laboratory analyses, and the Chain of Custody documenta- tion are attached to this report. KEI-J90-0501.R2 May 14, 1990 Page 2 Based on the analytical results of the soil samples, stockpiled soil represented by sample Comp C can be disposed of at an approved Class III disposal site. Stockpiled soil represented by Comp A, Comp B, Comp D, Comp E, Comp F, Comp G, Comp H, and Comp I should be disposed of to an approved Class II facility. DISTRIBUTION A copy of this report should be sent to the San Luis Obispo County Department of Environmental Health, and to the Regional Water Quality Control Board, Central Coast Region. Should you have any questions on this report, please do not hesitate to contact me at (707) 746-6915. Sincerely, Kaprealian Engineering, Inc. Christina L. Lecce cll Attachments: Table 1 Site Plan Laboratory Results Chain of Custody documentation KEI-J90-0501.R2 May 14, 1990 TABLE 1 SUMMARY OF LABORATORY ANALYSES (Samples collected on May 2, 1990) TPH as Ethyl- Organic Sample Gasoline Benzene Toluene Xylenes benzene Lead Comp A 260 ✓ 0.43 / 2.3 26 4.3 ND Comp B 450 ✓ 0.040 0.075 0.53 0.046 ND Comp C 77 0.043 0.11 5.0 0.39 ND Comp D 130 ✓ 0.043 0.63 8.0 0.53 ND Comp E 800 ✓ 3.0 ✓ 26 70 13 ND Comp F 660 ✓ 2.0 15 61 11 ND Comp G 230 ✓ 0.72 ✓ 4.3 17 4.0 ND Comp H 380 1.0 ✓ 8.0 43 7.0 ND Comp I 200 ✓ 0.51 2.4 19 3.3 ND Detection Limits 1.0 0.0050 0.0050 0.0050 0.0050 0.050 ND = Non -detectable. Results in parts per million (ppm), unless otherwise indicated. KAPREALIAN ENGINEERING, INC. Consulting Engineers P.O. BOX 996 • BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 ■ FAX: (707) 746-5581 SANTA ROSA STREET Comp A r lr l Pump Comp B U.G. Fuel Storage I (I Island 4, +r— 1 ^z � Tank Pit ( II I Comp C L JL Jr Comp D Z Existing Comp E Building 4 K a Comp F E• Z Comp G O V ri xCompk t �.i Vcomp M ( fl W.O. I Tank SITE PLAN 0 30 60 Approx. Scale toot LEGEND * Sample Point Location Unocal Service Station #6293 363 Santa Rosa San Luis Obispo. California SEQUOIA ANALYTICAL 680 Chesapeake Drive - Redwood City, CA 94063 (415) 364-9600 - FAX (415) 364-9233 ............. ............. .. . ........ ...... ..... . ....... . ...... ..... ..... . ........... .. .......... ..... .. .. .... ..... . .... .. ... . .... . ---- ---- :apreallan Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1. 0. Box 996 Matrix Descript: Soil 363 Santa Rosa/Montalban Received: May 2, lenicla, CA 94510 Analysis Method: EPA 5030/8015/8020 Analyzed: May 3, Itentlon: Mardo Kaprealian, P.E. First Sample #: 005-0315 IM . ...... A-B Reported: May 4, 4 -------- ......... . TOTAL PETROLEUM FUEL HYDROCARBONS with BTEX DISTINCTION (EPA 8015/8020) Sample Sample Low/Medium B.P. Ethyl Number Description Hydrocarbons Benzene Toluene Benzene Xylenes mg/kg mg/kg mg/kg mg/kg mg/kg (ppm) (ppm) (ppm) (ppm) (ppm) 0050315 A-B Composite A 260 0.43 2.3 4.3 26 0050316 A-B Composite B 450 0.040 0.075 0.046 0.53 0050317 A-B Composite C 77 0.043 0.11 0.39 5.0 0050318 A-B Composite D 130 0.043 0.63 0.53 8.0 0050319 A-B Composite E 800 3.0 26 13 70 0050320 A-B Composite F 660 2.0 15 11 61 0050321 A-B Composite G 230 0.72 4.3 4.0 27 0050322 A-B Composite H 380 1.0 8.0 7.0 43 0050323 A-B Composite 1 200 0.51 2.4 3.3 19 Detection Limits: 1.0 0.0050 0.0050 0.0050 0.0050 Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL A�b��— . 0( Belinda C. Vega Project Manager 50315.KEI < 1 SEQUOIA ANALYTICAL 680 Chesapeake Drive - Redwood City, CA 94063 (415) 364-9600 - FAX (415) 364-9233 Kaprealian Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, P.O. Box 996 Sample Descript: Soil Benicia, CA 94510 Analysis Method: California LUFT Manual, 12/87 Attention: Mardo Kaprealian, P.E. First Sample #: 005-0316 A-B ORGANIC LEAD Sample Sample Sample Number Description Results mg/kg (ppm) 0050315 A-B Composite A N.D. 0050316 A-B Composite B N.D. 0050317 A-B Composite C N.D. 0050318 A-B Composite D N.D. 0050319 A-B Composite E N.D. 0050320 A-B Composite F N.D. 0050321 A-B Composite G N.D. 0050322 A-B Composite H N.D. 0050323 A-B Composite I N.D. Detection Limits: 0.050 Sampled: May 2, Received: May 2, Extracted: May 3, Analyzed: May 4, Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL ?)-�" f �Y Belinda C. Vega 1 Project Manager 50315.KEI <2> !" �' g s r 16 Z F ' N MM d I KAPREALIAN ENGINEERING, INC. A I Consulting Engineers P.O. BOX 996 • BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 ■ FAX: (707) 746-5581 KEI-J90-0501.R1 May 14, 1990 Unocal Corporation 2000 Crow Canyon Place, Suite #400 P.O. Box 5155 San Ramon, CA 94583 Attention: Mr. Ron Bock RE: Soil Sampling Report Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California Dear Mr. Bock: This report summarizes the soil sampling performed by Kaprealian Engineering, Inc. (KEI) at the referenced site. All work was performed in compliance with the guidelines established by the Regional Water Quality Control Board (RWQCB), and the City of San Luis Obispo Fire Department. The scope of the work performed by KEI consisted of the follow- ing: Coordination with regulatory agencies. Collection of soil samples from beneath the fuel and waste oil tanks, from the sidewalls of the fuel tank pit, and from the sewer pipe trench. Delivery of samples, including proper Chain of Custody documentation, to a certified analytical laboratory. Technical review and preparation of this report. SITE DESCRIPTION AND BACKGROUND The subject site is presently used as a gasoline station. A Location Map and Site Plan are attached to this report. No leaks or previous subsurface work performed at the site are known to KEI. KEI-J90-0501.R1 May 14, 1990 Page 2 FIELD ACTIVITIES KEI's field work was conducted on May 1, 1990, when two under- ground fuel storage tanks and one waste oil tank were removed from the site. The tanks consisted of one 10,000 gallon unleaded regular tank, one 10,000 gallon super unleaded fuel storage tank, and one 550 gallon waste oil tank. The tanks were made of steel and no apparent holes or cracks were reportedly observed in any of the tanks. Mr. Michael Smith of the City of San Luis Obispo was present during tank removal and subsequent soil sampling. Four soil samples, labeled Al, A2, B1 and B2, were collected from beneath the fuel tanks at a depth of approximately 13.5 to 14.0 feet below grade. One soil sample, labeled WO1, was collected from beneath the waste oil tank at a depth of approximately 10.5 feet. Samples were collected from bulk material excavated by backhoe. Samples were placed in clean, two-inch diameter brass tubes, sealed with aluminum foil, plastic caps and tape, and stored in a cooled ice chest for delivery to a certified laborat- ory. Sample locations are as shown on the attached Site Plan. After sampling, the fuel tank pit was excavated to a depth of 14.0 feet, and the waste oil tank pit was excavated to a depth of 13.0 feet. Excavated soil from each tank pit was stockpiled separately on -site for further sampling. KEI returned to the site on May 2, 1990, in order to collect soil samples from the sidewalls of the fuel tank pit. Three samples, labeled SW1, SW2 and SW3, were collected from bulk material excavated by backhoe at a depth of about 13.0 feet. The samples were collected in the presence of Mr. Michael Smith of the City of San Luis Obispo Fire Department. These samples were also collected in clean two-inch diameter brass tubes, and handled as described above. Sidewall sample point locations are shown on the attached Site Plan. Also on May 2, 1990, two soil samples, labeled PWO1 and PWO2, were collected from beneath the sewer pipe trench at depths below grade of 4.0 and 3.5 feet, respectively. One sample was col- lected from excavated bulk materials, while the other was collected directly from the trench using a driven tube -type soil sampler. These samples were also collected at the direction of and in the presence of Mr. Michael Smith. The samples were also collected and handled as described above. Sewer trench sample point locations are also shown on the attached Site Plan. KEI-J90-0501.R1 May 14, 1990 Page 3 REGIONAL GEOLOGY AND SUBSURFACE CONDITIONS Based on our review of regional geologic maps (U.S.G.S. Mis- cellaneous Investigations Map I 1097 "Geologic Map of the San Luis Obispo - San Simeon Region, California" by C.A. Hall, Jr., et.al., 1979), the subject site is underlain by Quaternary -age alluvium, which is described as typically consisting of cobble - pebble gravel, sand, silt, and clay. In addition, the site is situated closely adjacent to a mapped geologic contact with melange bedrock materials of the Franciscan Complex. Melange materials generally consist of graywacke sandstone and highly sheared shale, which locally includes exotic clasts of con- glomerate, blueschist, greenstone and serpentine. The subsurface soils exposed in the excavations consisted primarily of artificial fill to a depth of about 2 to 3 feet underlain directly by weathered shale bedrock with serpentine encountered at one corner of the pit. The weathered shale bedrock materials are interpreted as melange bedrock of the Franciscan Complex. ANALYTICAL RESULTS All samples were analyzed by Sequoia Analytical Laboratory in Redwood City, California and were accompanied by properly executed Chain of Custody documentation. All fuel tank pit bottom and sidewall soil samples were analyzed for total petrol- eum hydrocarbons (TPH) as gasoline using EPA method 5030 in conjunction with modified 8015, benzene, toluene, xylenes and ethylbenzene (BTX&E) using EPA method 8020, and organic lead using the DHS-LUFT Method. In addition to TPH as gasoline and BTX&E, the soil sample WO1, collected from the waste oil tank pit, was analyzed for TPH as diesel using EPA method 3550 in conjunction with modified 8015, total oil and grease (TOG) by EPA 418.1 with clean up, EPA 8010 constituents, and metals cadmium, chromium, lead and zinc. Sewer trench samples, PWO1 and PWO2, were analyzed for TOG only. Analytical results of the soil samples, collected from the fuel tank pit, indicate non -detectable levels of TPH as gasoline for all samples, except samples B1 and SW1, which were 1.4 ppm and 1.3 ppm, respectively. Benzene was detected in all samples at concentrations ranging from 0.0054 ppm to 0.071 ppm. For toluene, xylenes and ethylbenzene results, refer to Table 1. Analytical results of the soil sample WO1, collected from beneath the waste oil tank pit, indicate 7.2 ppm of TPH as gasoline, 0.022 ppm benzene, 1.4 ppm TPH as diesel, 93 ppm TOG and non - detectable levels of all EPA 8010 constituents. Metals con- KEI-J90-0501.R1 May 14, 1990 Page 4 centrations are as follows: Non -detectable levels of cadmium, 25 ppm of chromium, 6.5 ppm of lead, and 79 ppm of zinc. Analyses of the soil samples, collected from under the sewer line, indicate levels of TOG at 4,200 ppm for sample PWO1, and 24,000 ppm for sample PWO2. Results of the soil analyses are summarized in Table 1. Copies of the laboratory analyses and the chain of custody documentation are attached to this report. DISCUSSION AND RECOMMENDATIONS Based on the analytical results of the soil samples, collected from under the sewer line, KEI recommends additional excavation of contaminated soil from the sewer pipe trench. KEI's work plan for this work is attached for your review and consideration. DISTRIBUTION A copy of this report should be City of San Luis Obispo Fire Central Coast Region. LIMITATIONS sent to Mr. Michael Smith of the Department, and to the RWQCB, Soil deposits and rock formations may vary in thickness, lithol- ogy, saturation, strength and other properties across any site. In addition, environmental changes, either naturally -occurring or artificially -induced, may cause changes in the extent and concentration of any contaminants. Our studies assume that the field and laboratory data are reasonably representative of the site as a whole, and assume that subsurface conditions are reasonably conducive to interpolation and extrapolation. The results of this study are based on the data obtained from the field and laboratory analyses obtained from a state certified laboratory. We have analyzed this data using what we believe to be currently applicable engineering techniques and principles in the Northern California region. We make no warranty, either expressed or implied, regarding the above, including laboratory analyses, except that our services have been performed in accordance with generally accepted professional principles and practices existing for such work. KEI-J90-0501.R1 May 14, 1990 Page 5 Should you have any questions regarding this report, please feel free to call me at (707) 746-6915. Sincerely, Kaprealian Engineering, Inc. Richard M. Bradish Staff Engineer 'C�Pol eAX/L--- Don R. Braun Certified Engineering Geologist License No. 1310 Exp. Date 6/30/90 Mardo Kaprealian President jad Attachments: Table 1 Location Map Site Plan Laboratory Analyses Chain of Custody documentation Work Plan KEI-J90-0501.R1 May 14, 1990 TABLE 1 SUMMARY OF LABORATORY ANALYSES (Samples collected on May 1 and 2, 1990) Depth TPH as Ethyl- Organic Sample feet Gasoline Benzene Toluene Xylenes benzene Lead Al 13.5 ND 0.0072 0.03 ND ND ND A2 14.0 ND 0.0080 0.018 ND ND ND B1 13.5 1.4 0.011 0.035 0.083 0.013 ND B2 13.5 ND 0.0054 0.019 ND ND ND SW1 13.0 1.3 0.035 0.022 0.014 0.037 ND SW2 13.0 ND 0.053 0.014 ND ND ND SW3 13.0 ND 0.071 0.018 0.0056 ND ND W01* 10.5 7.2 0.022 0.15 0.63 0.080 --- PWO1** 4.0 --- --- --- --- --- --- PWO2*** 3.5 --- --- --- ---- --- --- Detection Limits 1.0 0.0050 0.0050 0.0050 0.0050 0.050 * Laboratory analyses indicate 1.4 ppm TPH as diesel, 93 ppm TOG, and non -detectable levels of all EPA 8010 constituents. Metals concentrations were as follows: cadmium non -detectable, chromium 25 ppm, lead 6.5 ppm, and zinc 79 ppm. ** TOG was 4,200 ppm. *** TOG was 24,000 ppm. ND = Non -detectable. Results in parts per million (ppm), unless otherwise indicated. KAPREALIAN ENGINEERING, INC. Consulting Engineers P.O. BOX 996 • BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 • FAX: (707) 746-5561 LOCATION MAP Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California IIIl1►�1 z 04 a H z 0 M KAPREALIAN ENGINEERING, INC. Consulting Engineers P.O. BOX 996 - BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 o FAX: (707) 746-5581 SANTA ROSA STREET SW1 B1 Al Pump U.G. Fuel I SW3 Island Storage Tank �`�I Pit A2 JL SW2 B2 Existing Building r � S- W01 W.0. Tank SITE PLAN LEGEND * Sample Point Location S Sewer Line J S —S PWO1 I O 30 60 Approx. Scale feet Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California K . SEQUOIA ANALYTICAL 4D—L Iwo680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 Kaprealian Engineering, Inc. Client Project ID: Unocal #6293, P.O. Box 996 Matrix Descript: Soil 363 Benicia, CA 94510 Analysis Method: EPA 5030/8015 Attention: Mardo Kaprealian, P.E. First Sample #: 005-0324 TOTAL PETROLEUM FUEL HYDROCARBONS with BT Sample Sample Low/Medium B.P. Number Description Hydrocarbons Benzene T mg/kg mg/kg (PPm) (PPm) 005-0324 Al N.D. 0.0072 005-0325 A2 N.D. 0.0080 005-0326 Bt ....... S .. an Luis Obispo, �..- Sampled: May 2, 1 Santa Rosa/Montalban Received: May 2, 1 /8020 Analyzed: May 3, 1 Reported: May 4, 1 EX DISTINCTION (EPA 8015/8020) Ethyl oluene Benzene Xylenes mg/kg mg/kg mg/kg PPm) (PPm) (PPm) 0.030 N.D. N.D. 0.018 N.D. N.D. 005-0327 B2 005-0328 SWt 005-0329 SW2 005-0330 SW3 1.4 0.011 0.035 0.013 0.083 N.D. 0.0054 0.019 N.D. N.D. 1.3 0.035 0.022 0.037 0.014 N.D. 0.053 0.014 N.D. N.D. N.D. 0.071 0.018 N.D. 0.0056 Detection Limits: 1.0 0.0050 0.0050 0.0050 0.0050 Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega 9 Project Manager 50324.KEI <1> SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 ..... ...... ......... :...::.::.:,.».-,--,... Kaprea Ian tn�� g, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1 P.O. Box 996 Matrix Descript: Soil 363 Santa Rosa/Montalban Received: May 2, 1 Benicia, CA 94510 Analysis Method: California LUFT Manual, 12/87 Attention: Mardo Kaprealian, P.E. First Sample #: 005-0324 Analyzed: May 3, 1 May 4 1 Sample Sample Number Description 005-0324 Al 005-0325 A2 005-0326 81 005-0327 132 005-0328 SW1 005-0329 SW2 005-0330 SW3 ORGANIC LEAD Sample Results mg/kg (ppm) N.D. N.D. N.D. N.D. N.D. N.D. N.D. Detection Limits: 0.050 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL C .� Belinda C. Vega IV Project Manager 50324.KEI <2> V r4 Ic M ■ Q ) u 2 SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 ----------------------- r , ---------------- Kap --------- -------- -:� reaflan Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1 P.O. Box 996 Sample Descript: Soil, W01 363 Santa Rosa/montalban Received: May 2, 1 Benicia, CA 94510 Extracted: May 3, 1 Attention: Mardo Kapreallan, P.E. Lab Number: 005-0331 Analyzed: May 3, 1 Reported: Mav 4. 1 LABORATORY ANALYSIS Analyte Detection Limit Sample Results mg/kg mg/kg Cadmium........................................................................... 0.50 ..................................... N.D. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL 3..-�� Belinda C. Vega Project Manager 50331.KEI < 1 > SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 galian Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1 Box 996 Sample Descript.: Soil, W01 363 Santa Rosa/Montalban Received: May 2, 1 ;la, CA 94510 Analysis Method: EPA 5030/8015/8020 Analyzed: May 2, 1 lion: Mardo Kaprealian, P.E. Lab Number: 005-0331 Rworted: Mav 4. 1 TOTAL PETROLEUM FUEL HYDROCARBONS WITH BTEX DISTINCTION (EPA 8015/8020) Analyte Detection Limit Sample Results mg/kg (ppm) mg/kg (ppm) Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL t� • VJ Belinda C. Vega Project Manager 50331.KEI <2> 4D- SEQUOIA ANALYTICAL NO680 Chesapeake Drive 9 Redwood City, CA 94063 (415) 364-9600 - FAX (415) 364-9233 K, T W 111M Kapreallan Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1990:: P.O. Box 996 Matrix Descript: Soil 363 Santa Rosa/Montalban Received: May 2, 1990! Benicia, CA 94510 Analysis Method: EPA 3550/8015 Extracted: May 2, 1990. Attention: Mardo Kapreallan, P.E. First Sample #: 005-0331 Analyzed: May 3, 1990: Reported: May 4, 19W: ................ TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) Sample Sample High B.P. Number Description Hydrocarbons mg/kg (ppm) 005-0331 Woll Detection Limits: 10 High Boiling Point Hydrocarbons are quantitated against a diesel fuel standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Project Manager 50331.KEI <3> SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 Kapreallan Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1 P.O. Box 996 Matrix Descript: Soil Received: May 2, 1 Benicia, CA 94510 Analysis Method: EPA 418.1 (I.R. with clean-up) Extracted: May 3, 1 Attention: Mardo Kaprealian, P.E. First Sample #: 005-0331 Analyzed: May 3, 1 Reported: May .:4,1 TOTAL RECOVERABLE PETROLEUM HYDROCARBONS Sample Sample Petroleum Oil Number Description mg/kg (ppm) 005-0331 WOt 93 005-0332 Moll 4,200 005-0333 PW02 24,000 Detection Limits: 50 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL 13J:�k_ca)) Belinda C. Vega Project Manager 50331.KEI <4> SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 -- ----------- -- --------,...:.q. �:,,:.,., , . :�.:: .. ... .. ::...: ::.: F�%F� +C\� ..• a, ..::: .. ••Ne .� - ..... ... fin' Ago � �.............................,. :..,,, ,.. Kaprealian Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: May 2, 1 P.O. Box 996 Sample Descript: Soil, WO1 363 Santa Rosa/Montalban Received: May 2, 1 Benicia, CA 94510 Analysis Method: EPA 5030/8010 Analyzed: May 2, 1 >'Attentlon. Mardo Kapreallan, P.E. Lab Number: 005-0331 Reported: MaV 4, 1 BMW Analyte HALOGENATED VOLATILE ORGANICS (EPA 8010) Detection Limit Ng/kg Sample Results Ng/kg Bromodichloromethane.................................................... 5.0 ..................................... N.D. Bromoform........................................................................ 5.0 ..................................... N.D. Bromomethane................................................................. 5.0 ..................................... N.D. Carbon tetrachloride......................................................... 5.0 ..................................... N.D. Chlorobenzene.................................................................. 5.0 ..................................... N.D. Chloroethane..................................................................... 25 ..................................... N.D. 2-Chloroethylvinyl ether .................................................... 5.0 ..................................... N.D. Chloroform........................................................................ 5.0 ..................................... N.D. Chloromethane.................................................................. 5.0 .......... I.......................... N.D. Dibromochloromethane.................................................... 5.0 ..................................... N.D. 1,2-Dichlorobenzene......................................................... 10 ..................................... N.D. 1,3-Dichlorobenzene......................................................... 10 ..................................... N.D. 1,4-Dichlorobenzene......................................................... 10 ..................................... N.D. 1,1-Dichloroethane............................................................ 5.0 ..................................... N.D. 1,2-Dichloroethane............................................................ 5.0 ...... I.............................. N.D. 1,1-Dichloroethene............................................................ 5.0 ..................................... N.D. Totals,2-Dichloroethene................................................... 5.0 ..................................... N.D. 1,2-Dichloropropane......................................................... 5.0 ..................................... N.D. cis-1,3-Dichloropropene................................................... 5.0 ..................................... N.D. trans-1,3-Dichloropropene................................................ 5.0 ..................................... N.D. Methylene chloride............................................................ 10 ..................................... N.D. 1,1,2,2-Tetrachloroethane................................................. 5.0 ..................................... N.D. Tetrachloroethene............................................................. 5.0 .................................... N.D. 1,1,1-Trichloroethane........................................................ 5.0 ..................................... N.D. 1,1,2-Trichloroethane........................................................ 5.0 ..................................... N.D. Trichloroethene................................................................. 5.0 ................................... ... N.D. Trichlorofluoromethane.................................................... 5.0 ..................................... N.D. Vinylchloride..................................................................... 10 ..................................... N.D. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL . C .`6 Belinda C. Vega Project Manager 50331.KEI <5> 9 u i A n• A N 41 y � O C Y N Y Ou w — — — — — — — ` C y 4yp Ep r N � -T--T I j SEQUOIA ANALYTICAL 680 Chesapeake Drive • Redwood City, CA 94063 (415) 364-9600 • FAX (415) 364-9233 Kaprealian Engineering, Inc. Client Project ID: Unocal #6293, San Luis Obispo, Sampled: P.O. Box 996 Matrix Descript: Soil 363 Santa Rosa/Montalban Received: Benicia, CA 94510 Analysis Method: EPA 3550/8015 Extracted: Attention: Mardo Kaprealian, P.E. First Sample #: 005-0331 Analyzed: TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) Sample Sample High B.P. Number Description Hydrocarbons mg/kg (ppm) 005-0331 w01 1.4 Detection Limits: 1.0 High Boiling Point Hydrocarbons are quantitated against a diesel fuel standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Project Manager nease Note: Amended Report dated: 5/4/90 May 2, 1990 May 2, 1990 May 2, 1990 May 3, 1990`: Mav 4. 1990' 50331.KEI <3> u N 0.. y O C Y a J] Q N N O Y r w N -T--T---) M1 J Ll IA � 1A V V i ff4l M I v1 O KAPREALIAN ENGINEERING, INC. K E 14 Consulting Engineers P.O. BOX 996 o BENICIA, CA 94510 (707) 746-6915 9 (707) 746-6916 • FAX: (707) 746-5581 DEC 211990 RONA1 n KEI-J90-0501.R3 November 5, 1990 Unocal Corporation 2000 Crow Canyon Place, Suite #400 P.O. Box 5155 San Ramon, CA 94583 Attention: Mr. Ron Bock RE: Soil Sampling Report Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California Dear Mr. Bock: This report summarizes the results of soil sampling performed by Kaprealian Engineering, Inc. (KEI) at the referenced site. All work was performed in compliance with the guidelines established by the City of San Luis Obispo Fire Department. The scope of the work performed by KEI consisted of the follow- ing: Coordination with the regulatory agencies. Collection of soil samples from beneath the sewer pipe trench. Delivery of soil samples with proper Chain of Custody documentation to a certified analytical laboratory. Technical review and preparation of this report. SITE HISTORY AND BACKGROUND The subject site is presently used as a gasoline station. A Location Map and Site Plans are attached to this report. KEI's initial field work at this site was conducted on May 1, 1990, when two 10,000 gallon underground fuel storage tanks and one 550 gallon waste oil tank were removed from the site. The tanks were made of steel and no apparent holes or cracks were observed in any of the tanks. Four soil samples, labeled Al, A2, B1 and B2, were collected from beneath the fuel tanks at depths of approximately 13.5 to 14 feet below grade. KEI-J90-0501.R3 November 5, 1990 Page 2 One soil sample, labeled WO1, was collected from beneath the waste oil tank at a depth of approximately 10.5 feet. Sample locations are as shown on the attached Site Plan, Figure 1. After sampling, the fuel tank pit was excavated to a depth of 14.0 feet, and the waste oil tank pit was excavated to a depth of 13.0 feet. KEI returned to the site on May 2, 1990, in order to collect soil samples from the sidewalls of the fuel tank pit. Three samples, labeled SW1, SW2 and SW3, were collected at a depth of about 13.0 feet below grade. Sidewall sample point locations are shown on the attached Site Plan, Figure 1. Also on May 2, 1990, two soil samples, labeled PWO1 and PWO2, were collected from beneath the sewer pipe trench at depths below grade of 4.0 and 3.5 feet, respectively. Sewer trench sample point locations are also shown on the attached Site Plan, Figure 1. All samples were analyzed by Sequoia Analytical Laboratory in Redwood City, California. All fuel tank pit bottom and sidewall soil samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline using EPA method 5030 in conjunction with modified 80151 benzene, toluene, xylenes and ethylbenzene (BTX&E) using EPA method 8020, and organic lead using the DHS-LUFT Method. In addition to TPH as gasoline and BTX&E, the soil sample WO1, collected from the waste oil tank pit, was analyzed for TPH as diesel using EPA method 3550 in conjunction with modified 8015, total oil and grease (TOG) by EPA 418.1 with clean up, EPA 8010 constituents, and metals cadmium, chromium, lead and zinc. Sewer trench samples, PWO1 and PWO2, were analyzed for TOG only. Analytical results of the soil samples, collected from the fuel tank pit, indicate non -detectable levels of TPH as gasoline for all samples, except samples B1 and SW1, which were 1.4 ppm and 1.3 ppm, respectively. Benzene was detected in all samples at concentrations ranging from 0.0054 ppm to 0.071 ppm. Analytical results of the soil sample WO1, collected from beneath the waste oil tank pit, indicate 7.2 ppm of TPH as gasoline, 0.022 ppm benzene, 1.4 ppm TPH as diesel, 93 ppm TOG and non -detectable levels of all EPA 8010 constituents. Metals concentrations are as follows: Non -detectable levels of cadmium, 25 ppm of chromi- um, 6.5 ppm of lead, and 79 ppm of zinc. Analyses of the soil samples, collected from under the sewer line, indicate levels of TOG at 4,200 ppm for sample PWO1, and 24,000 ppm for sample PWO2. Results of the soil analyses are summarized in Table 1. The details of the soil sampling ac- KEI-J90-0501.R3 November 5, 1990 Page 3 tivities are presented in KEI's report (KEI-J90-0501.R1) dated May 14, 1990. Based on the analytical results of the soil samples collected from under the sewer line, KEI recommended additional excavation of contaminated soil from the sewer pipe trench. FIELD ACTIVITIES KEI's field work was conducted on October 1, 1990 when the sewer line located on the southwesterly side of the existing building was excavated. Soil sampling was performed in the presence of Mr. Michael Smith of the City of San Luis Obispo Fire Department. Three initial soil samples, labeled PWO-3, PWO-4 and PWO-5, were collected from the sewer line trench at depths ranging from about 3.5 to 4.5 feet below grade. The samples were collected from the trench using a driven tube -type soil sampler. The samples were placed in a clean, two-inch diameter brass tube, sealed with aluminum foil and plastic caps, and stored in a cooled ice chest for delivery to a certified laboratory. Sample locations are as shown on the attached Site Plan, Figure 2. The excavated soil was stockpiled on -site for further sampling. Upon review of the analyses of the initial soil samples, KEI returned to the site on October 3, 1990 to observe additional soil excavation from beneath sample point locations PWO-3 and PWO-5. Two additional soil samples were collected at 1 foot intervals beneath each of the two previous sample point locations (PWO-3 and PWO-5). The samples collected below sample point location PWO-3 were labeled PWO3-4.5 and PWO3-5.5, while those collected beneath sample point location PWO-5 were labeled PWO5-5 and PWO5-6. One additional soil sample, labeled PWO6-4, was also collected at a depth of about 4 feet at the southeast end of the sewer pipe trench excavation. Samples were collected and handled as described above. Sample point locations are as indicated on the attached Site Plan, Figure 2. REGIONAL GEOLOGY AND SUBSURFACE CONDITIONS Based on our ,review of regional geologic maps (U.S.G.S. Mis- cellaneous Investigations Map I 1097 "Geologic Map of the San Luis Obispo - San Simeon Region, California" by C.A. Hall, Jr., et.al., 1979), the subject site is underlain by Quaternary -age alluvium, which is described as typically consisting of cobble - pebble gravel, sand, silt, and clay. In addition, the site is situated closely adjacent to a mapped geologic contact with melange bedrock materials of the Franciscan Complex. Melange materials generally consist of graywacke sandstone and highly KEI-J90-0501.R3 November 5, 1990 Page 4 sheared shale, which locally includes exotic clasts of con- glomerate, blueschist, greenstone and serpentine. The subsurface soils exposed in the sewer pipe trench excavation consisted primarily of artificial fill to a depth of about 3.5 to 4.5 feet which were underlain directly by weathered shale bedrock, while the subsurface soils exposed in the tank pit excavation consisted primarily of artificial fill to a depth of about 2 to 3 feet and underlain directly by weathered shale bedrock with serpentine bedrock materials encountered at one corner of the pit. The weathered shale bedrock materials are interpreted as melange bedrock of the Franciscan Complex. ANALYTICAL RESULTS The samples were analyzed by Sequoia Analytical Laboratory in Redwood City, California and were accompanied by properly executed Chain of Custody documentation. Samples PWO-3, PWO-4 and PWO-5 were analyzed for TPH as gasoline using EPA method 5030 in conjunction with modified 8015, benzene, toluene, xylenes and ethylbenzene (BTX&E) using EPA method 8020, TPH as diesel using EPA method 3550 in conjunction with modified 8015, TOG using EPA method 418.1, and metals - cadmium, chromium, lead and zinc. Samples PWO3-4.5, PWO3-5.5, PWO5-5, PWO5-6 and PWO6-4 were analyzed for TOG only. Analyses of the initial soil samples (PWO-3, PWO-4 and PWO-5) indicate levels of TPH as gasoline ranging from non -detectable to 13 ppm, benzene ranging from non -detectable to 0.0080 ppm, and TPH as diesel ranging from non -detectable to 56 ppm. Analyses for TOG was non -detectable for sample PWO-4, while PWO-3 and PWO- 5 showed levels of 1,000 ppm and 1,600 ppm, respectively. However, analyses of the soil samples collected after additional excavation (samples PWO3-4.5, PW03-5.5, PWO5-5 and PWO5-6) indicate non -detectable levels of TOG for all four samples. Analysis of sample PWO6-4 also indicates a non -detectable level of TOG. Results of the soil analyses are summarized in Table 2. Copies of the laboratory analyses and Chain of Custody documen- tation are attached to this report. DISCUSSION AND RECOMMENDATIONS Based on the analytical results, visual inspection, and no apparent evidence of shallow ground water, KEI recommends no further sampling at this time, unless required by the regulatory agencies. KEI-J90-0501.R3 November 5, 1990 Page 5 DISTRIBUTION A copy of this report San Luis Obispo Fire Quality Control Board, LIMITATIONS should be sent to Mr. Michael Smith of the Department, and to the Regional Water Central Coast Region. Soil deposits and rock formations may vary in thickness, lithol- ogy, saturation, strength and other properties across any site. In addition, environmental changes, either naturally -occurring or artificially -induced, may cause changes in the extent and concentration of any contaminants. Our studies assume that the field and laboratory data are reasonably representative of the site as a whole, and assume that subsurface conditions are reasonably conducive to interpolation and extrapolation. The results of this study are based on the data obtained from the field and laboratory analyses obtained from a state certified laboratory. We have analyzed this data using what we believe to be currently applicable engineering techniques and principles in the Northern California region. We make no warranty, either expressed or implied, regarding the above, including laboratory analyses, except that our services have been performed in accordance with generally accepted professional principles and practices existing for such work. KEI-J90-0501.R3 November 5, 1990 Page 6 Should you have any questions regarding this report, please feel free to call me at (707) 746-6915. Sincerely, Kaprealian Engineering, Inc. Richard M. Bradish Staff Engineer Don R. Braun Certified Engineering Geologist License No. 1310 Exp. Date 6/30/92 Mardo Kaprealian President \j ad Attachments: Tables 1 & 2 Location Map Site Plans - Figures 1 & 2 Laboratory Analyses Chain of Custody documentation w m N EQ ro a n IA ro m K F�- F-� N 0 ro ro O N m fA En 0 rt m In m N- a 0 Iv rt m a H a W 0 Iv rt m a sv En 0 rt ro m K �n 0 m a z d u z O I a m rt m 0 rt Iv m V rt 00000000 N•(D 0)InUl I I ww 1 ro rt 0 1 1 1 Ul A. I I w F -' Ul rt 4�- m Ul Ul &. m N. 0 V7 C7 -CS mUlU1w [(D mrocn*ncn rt �r 1-3 wv dv� I0 0 0 Fa HnJ 1 1 1 iv z 1 1 �, m x N 01 m m �v o F✓ � wy I l I z z I I H O x I I 10 0 1 1 w N O �• Ul m w o O m O I I I z z l l 0 N 0 I I I o u 1 1 0 m Ul 00 :j O 0 m 0 o 0 Fl O I 1 1 z z I I o I~ O I I I C7 C7 1 I H m Ln rn z o m O O 0 H o i i i zG o i i w 0 O O w m Ul J In O O v t2i I I I z z 1 1 p oz5 O 11 1 o u 11 0 N I.< O N Ip F� Ul In �l I O (D n w 0 a • 1 1 I0o I I z 1 U1 1 1 I 00 1 1 0 FW- O Ln Ul n x N 1i I I 1 O N 1 I H 0 N Ul I?Li07 0) m N I I I U1 0 1 1 o 10, Ut N FJ- O I 11 0 Ul I I Ln lo Ut 0 n 0 En N N m O rt m K a O 0 It O rt*O O r tr' r m �-3 fi O FJ FC sr Li > co O td z 9 y Ko O Ul Ul 0 N F-J• k� W w 0 KEI-J90-0501.R3 November 5, 1990 TABLE 1 SUMMARY OF LABORATORY ANALYSES (Collected on May 1 & 2, 1990) Depth TPH as Ethyl- Organic Sample feet Gasoline Benzene Toluene Xylenes benzene Lead Al 13.5 ND 0.0072 0.03 ND ND ND A2 14.0 ND 0.0080 0.018 ND ND ND B1 13.5 1.4 0.011 0.035 0.083 0.013 ND B2 13.5 ND 0.0054 0.019 ND ND ND SW1 13.0 1.3 0.035 0.022 0.014 0.037 ND SW2 13.0 ND 0.053 0.014 ND ND ND SW3 13.0 ND 0.071 0.018 0.0056 ND ND W01* 10.5 7.2 0.022 0.15 0.63 0.080 -- PWO1** 4.0 -- -- -- --- -- -- PWO2*** 3.5 -- -- -- -� -- -- Detection Limits 1.0 0.0050 0.0050 0.0050 0.0050 0.050 * Laboratory analyses indicate 1.4 ppm TPH as diesel, 93 ppm TOG, and non -detectable levels of all EPA 8010 constituents. Metals concentrations were as follows: cadmium non -detectable, chromium 25 ppm, lead 6.5 ppm, and zinc 79 ppm. ** TOG was 4,200 ppm. *** TOG was 24,000 ppm. ND = Non -detectable. -- Indicates analysis not performed. Results in parts per million (ppm), unless otherwise indicated. ! .■■■■� � z a CO a a H z 0 KAPREALIAN ENGINEERING, INC. Consulting Engineers PO BOX 996 ■ BENICIA, CA 94510 (707) 746-6915 9 (707) 746-6916 9 FAX: (707) 746-5581 SANTA ROSA STREET SW1 B1 :fa Al U.G. Fuel II ( S' Storage Tank �I J Pit LA A2 SW2 B2 Existing Building �PW02 _I♦�—S 1 WO1 W.O. Tank SITE PLAN Figure 1 LEGEND * Sample Point Location S Sewer Line A S Pump Island S _ s PWO1 O 30 60 Approx. Scale feet Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California KAPREALIAN ENGINEERING, INC. K E I Consulting Engineers P.O BOX 996 • BENICIA, CA 94510 (707) 746-6915 • (707) 746-6916 9 FAX: (707) 746-5581 SANTA ROSA STREET --~�_ -- 0 U.G. Fuel l Storage Tank S F �r I Pump i Island E S z Existing ¢ Building a� a z W.0 PW06-4. 0 Tank —WN If PWO-5 i PWO-3 PWO-4 PW05-5 1 PW03-4.5 PW03 5.5 SITE PLAN Figure 2 LEGEND * Sample Point Location S Sewer Line © Area Excavated 0 30 60 FM Approx. Scale feet Unocal Service Station #6293 363 Santa Rosa San Luis Obispo, California j!54) SEQUOIA ANALYTICAL 1900 Bates Avenue a Suite LM ■ Concord, California 94520 (415) 686-9600 0 FAX (415) 686-9689 Kaprealian Engineering, Inc. Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo Sampled: Oct 1, 1990 P.O. Box 996 Matrix Descript: Soil Received: Oct 2, 1990 . Benicia, CA 94510 Analysis Method: EPA 5030/8015/8020 Analyzed: Oct 2, 1990 Attention: Mardo Kaprealian, P.E. First Sample #: 010-0054 Reported: Oct 3, 1990 TOTAL PETROLEUM FUEL HYDROCARBONS with BTEX DISTINCTION (EPA 8015/8020) Sample Sample Low/Medium B.P. Ethyl Number Description Hydrocarbons Benzene Toluene Benzene Xylenes mg/kg mg/kg mg/kg mg/kg mg/kg (ppm) (ppm) (ppm) (ppm) (ppm) 010-0054 Pwo-3 13 0.0080 0.016 0.025 0.33 010-0055 Pwo-4 N.D. N.D. N.D. N.D. 0.0070 010-0056 Pw0-5 N.D. N.D. N.D. N.D. N.D. Detection Limits: 1.0 0.0050 0.0050 0.0050 0.0050 Low to Medium Boiling Point Hydrocarbons are quantitated against a gasoline standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL �_- Belinda C. Vegj Laboratory Director 100054.KEI < 1 > ` SEQUOIA ANALYTICAL 1900 Bates Avenue a Suite LM • Concord, California 94520 (415) 686-9600 0 FAX (415) 686-9689 .-Kaprealian Engineering, Inc. Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo Sampled: Oct 1, 1990 P.O. Box 996 Matrix Descript: Soil Received: Oct 2, 1990 Benicia, CA 94510 Analysis Method: EPA 3550/8015 ::Attention: Mardo Kaprealian, P.E. First Sample #: 010-0054 Analyzed: Oct 3, 1990 . ReportedOct 3, 1990 ,...� ::........:-ate.:...:-;;:-,�.::..;., .-:w - TOTAL PETROLEUM FUEL HYDROCARBONS (EPA 8015) Sample Sample High B.P. Number Description Hydrocarbons mg/kg (ppm) 010-0054 PWO-3 56 010-0055 PWO-4 N.D. 010-0056 PWO-5 26 Detection Limits: 1.0 High Boiling Point Hydrocarbons are quantitated against a diesel fuel standard. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Laboratory Director 100054.KEI <2> SEQUOIA ANALYTICAL 1900 Bates Avenue * Suite LM v Concord, California 94520 Nip (415) 686-9600 0 FAX 415) 68 6-96 89 . ... ...................... ................ ------- . .. . . ... ....... I .................... . ... ... % m"" ----- - - ------ Kaprealian Engineering, Inc. Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo Sampled: Oct 1, 1990 P.O. Box 996 Matrix Descript: Soil Received: Oct 2, 1990 -Benicia, CA 94510 Analysis Method: EPA 418.1 (I.R. with clean-up) Extracted: Oct 2, 1990 :Attention: Mardo Kaprealian, P.E. First Sample #: 010-0054 Analyzed: Oct 3, 1990 Reported: Oct 3, 1990 % a =n TOTAL RECOVERABLE PETROLEUM HYDROCARBONS Sample Sample Petroleum Oil Number Description mg/kg (ppm) 010-0054 PWO-3 1,000 010-0055 PWO-4 N.D- 010-0056 PWO-5 1,600 Detection Limits: 1.0 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Laboratory Director 100054.KEI <3> SEQUOIA ANALYTICAL 1900 Bates Avenue • Suite LM ■ Concord, California 94520 () c ) 415 686-9600 •FAX 415 686-9689...::y.�,;�:��;,��,.� ........... . .... ..:..:::::....: ;�fk��:�;>�,,�°°�,°'°�,�•''�.Y Kaprealian Engineering, Inc. Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo Sampled: Oct 1, 1990. P.O. Box 996 Sample Descript: Soil, PWO-3 Received: Oct 2, 1990 Benicia, CA 94510 Extracted: Oct 2, 1990 Attention: Mardo Kaprealian, P.E. Lab Number: 010-0054 Analyzed: Oct 2, 1990 - .. ....................... . 3, 1990 . ...Oct "'ice r ;;:.:::;.:.. LABORATORY ANALYSIS Analyte Detection Limit Sample Results mg/kg mg/kg Cadmium........................................................................... 0.50..................................... N.D. Chromiurti ..............i:�.r`i.iGrxif,Tk} ..'. 'k' �i:..........::.:..�un. 0.25 0.25 Lead. - .. h a Zinc.. 0.60 ;55 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Laboratory D7 rector 100054.KEI <4> i1 SEQUOIA ANALYTICAL 1900 Bates Ave (415) 686-9600 :..:: ......:.....:.:..:..::: . Kaprealian Engineering, Inc. P.O. Box 996 Benicia, CA 94510 ,,.Attention: Mardo Kaprealian, P.E. Analyte iue • Suite LM ■ Concord, California 94520 ° FAX (415) 686 9689 Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo Sampled: Oct 1, 1990 Sample Descript: Soil, PWO-4 Received: Oct 2, 1990 Lab Number: Extracted: Oct 2, 1990 010-0055 Analyzed: Oct 2, 1990 Reported: Oct 3, 1990 .......... ....... - ----.. LABORATORY ANALYSIS Detection Limit mg/kg Sample Results mg/kg Cadmium.. 0.50 Chromium.. 0.25 24 Lead: 0.25 8.0 Zinc.: 0.50 i5. Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL �-C av Belinda C. Vega Laboratory Director 100054.KEI <5> SEQUOIA ANALYTICAL 1900 Bates Avenue • Suite LM • Concord, California 94520 (415) 686-9600 ■ FAX (415) 686-9689 .. ......... Kaprealian Engineering, Inc. Client Project ID: Unocal, 363 Santa Rosa, San Luis Obispo ....... .. :- Sampled: Oct 1, 1990. .P.O. Box 996 Sample Descript: Soil, PWO-5 Received: Oct 2, 1990 Benicia, CA 94510 Extracted: Oct 2, 1990 Attention: Mardo Kaprealian, P.E. Lab Number: 010-0056 Analyzed: Oct 2, 1990.,- Reported: Oct 3, 1990. .. - - .. LABORATORY ANALYSIS Analyte Detection Limit Sample Results mg/kg mg/kg Cadmium. 0.50 0.95 Chromium. 0.25 200 .... Lead........... .:................... ..,.,....... ...:..............,.............. 0.25 ..........:..................:...:,.:...... 3.5 Zinc...................:.:...:.:.......:.................. <. ,:................... 0.50 :..::.:..:................... 70 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL Belinda C. Vega Laboratory Director 100054.KEI <6> � b 0 � � r r d W ` N V b N1 \0 (V) j W y y � � .r �+ a a ■ r a_ a 7 7 Y1 r • �e a • Y 1 Y M N ' E E .0 C SEQUOIA ANALYTICAL 1900 Bates Avenue • Suite LM • Concord, California 94520 (415) 686-9600 • FAX (415) 686-9689 s.. ,..v- ......:,,,, , :f........ ........... Kaprealian Engineering, Inc. Client Project ID: Unocal, San Luis Obispo Sampled: Oct 3, 1990 P.O. Box 996 Matrix Descript: Soil 363 Santa Rosa Received: Oct 4, 1990 Benicia, CA 94510 Analysis Method: EPA 418.1 (I.R. with clean-up) Extracted: Oct 4, 1990 Attention: Mardo Kaprealian, P.E. First Sample #: 010-0104 Analyzed: Oct 4, 1990 Reported: Oct 5, 1990.. 'TOTAL RECOVERABLE PETROLEUM HYDROCARBONS Sample Sample Petroleum Oil Number Description mg/kg (ppm) 010-0104 PW03-4.5 N.D. 010-0105 PW03-5.5 N.D. 010-0106 PW05-5 N.D. 010-0107 PW05-6 N.D. 010-0108 PW064 3.0 Detection Limits: 1.0 Analytes reported as N.D. were not present above the stated limit of detection. SEQUOIA ANALYTICAL eo,-� W Belinda C. Vega Laboratory Director 100104.KEI <1> L+� Rog E4a M1 Y 100 V- N a Y - C �r � r r � \ N -' � 5a t,:) � wa - - - VN O r kq V r W 6 - v I LA 7 A 7 r r+C W V V u _ o ` _ a a N - do A 41 • c I I w 0 Y 0