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a F 3v �08 Table 1 Summary of Results Of Ground Water sampling hi Chevron Service Station M 9"4275 2905 West Benjamin Holt Drive, Stockton, California Concentrations in parts per billion (Ppb) WELL DATE OF CASING DEPTH GROUND TPH-G TOG B T E X 1,2 1.2 F113 LAB s pLEa DCB IO SAMPLING/ ELEVATION TO WATER MONITORING WATER ELEVATION 60 ND(2.0 10 20 CCAS MW-S 03/22/89 3.79 17.18 -1J.39 4000 ND(3000 z4 22 110 753 NO(0.2 NO(0.2 ND(1 CCAS MW-5 06/12/89 3.79 17.80 -14_01 900 MW-5 09/07/89 3.79 19.11 -15.32 410 I6 4 12 SD ND(0.2 ND(0.2 ND(1 CCAS --- 15 4 11 49 ND<0.2 ND<0.2 ND(1 CCAS MW-SD 09/07/89 3.79 19.11 -15.32 36D ?4 22 100 590 --- --" --^ PACE MW-5 12/10/89 3.79 18.63 -14.84 2900 `-- 37 29 120 630 --- --- --- PACE MW-5 03/20/90 3.79 18.19 -14.40 3400 --^ 65 89 200 1200 --- --- - PASE MI 07/03/90 3.79 19.43 -15.64 5500 "-- 55 82 190 1100 --- --- -- PACE MI 10/19/90 3.79 20.04 -16.25 5900 26 51 140 830 --- --- SRL MW-5 01/17/91 3.79 19.98 -16.19 4900 -- TB 03/22/89 NA NA NA ND(500 --- ND(0,2• ND(0.2 NO(0.2 ND(0.4 ND(O.1 ND(0.2 ND(1 CCAS Tg 06/12/89 NA NA NA ND(50 --- ND(0.2 ND(0.5 ND(O.1 ND(0.2 ND(O.1 ND(O.1 ND(O.5 CCAS 78 09!07/89 NA NA NA ND(50 - ND(1.0 ND ND<O.1 ND10.2 ND(O.1 ND(O.1 --- PACE TQ 12/18/89 NA NA NA NO(50 Y__ ND(0.5 N000.5 ND(0.5 ND(O.5 ND(0.5 ND(O.S "_ T8 03/24/90 NA NA NA NDC50 --- ND(O.5 ND(O.5 ND(O.S ND(O_5 -ND<D.5 ND(O.S ND(0.2 PAGE Np(SO ND(O.5 NO{O.5 ND(O.5 ND(0.5 LACE . TB 07/03/90 NA NA NA __- - --- PACO NA ND(50 "-- NO{4.S NO NO(O,5 NDCD.S 7g 10f19/90 NA NA ND(O.5 ND(O.5 ND(O.5 NO(0.5 --- --- -" SAL T8 01/17/91 NA NA NA ND(50 --- --- ND(O.5 NG<O.5 ND(O.5 ND(O.S - --- ^-- PACE RINSATE 07/03/90 NA NA NA ND(50 ND(O.5 ND(O.5 ND(O.5 ND(O.S --- --- --- PACE RINSATE 10/19/90 NA NA NA ND(50 - ND(O.S NO(0.5 NO(O-5 ND(0.5 --- --` SAL RINSATE 01/17/91 NA NA NA NO(SO --- _"__""- _"---"___^---"____^__`- _---------------------------"---------------------------------------------------- - --_`---------"_^---"-_-`---------------- ---------____`----______ EXPLANATION OF ABBREVIATIONS: :Wa =Total Petrolou -- :Not Analyzed/Not Measured 7PH-G m Hydrocarbons as Gasoline D ;Duplicate (EPA method 8015 modified) NA :Not Applic•nble/Not Available TOC, :Total Oil and Grease (EPA method 503D L 503E) ND ;Not Detected 3 B :Benzene (EPA method 8020 or 6240) 7B :Trip Blank T :Toluene (EPA method 8020 or 8240) SAL :Superior Analytical Labs E :Ethyibenzene (EPA method or 0240)0 or 8240) CCAS :Central Coast Analytical Service X ,Xylonas (EPA method 8020 or PACE :PACE Labs 1.2-DCEa :1. 2-Dichloroethano * ;Does not match typical gasoline pattern 1.2-OCB :1. 2-Dichlorobenzene F113 ,Freon 113 Note: Top of Casing and Ground Water Elevations are expressed as feet above mean sea level (NGVD - 1929).-^----------------'_---- Llcm i PAW' ,. L 08-Mar-91 3�y ! ..