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31-0308 <br /> Teble 1 <br /> Summary of Results of Ground Water Sampling <br /> Chevron Service Station 9 9-4275 <br /> 2905 Fest Benjamin Holt Drive, Stockton, California <br /> Concentrations in parts per billion (ppb) <br /> zzzmzzzzssa�zszmazzmzaaasamazzaasaaaasmassamsrzamassasrmzamsaaaaaaaaasaasaaasmaaaasamaasaaszaammasaazaaaasgsaazzaaszwzzaszzsaazzsaazzasssaasarzmasswzssraaasasssrzaaaa <br /> WELL DATE OF TOP OF DEPTH GROUND TPH-G TOG B T E X D� DCB DCB 1.4 F113 TCE LAS <br /> ID SAMPLING/ CASING TO HATER <br /> OCS <br /> MONITORING ELEVATION WATER ELEVATION <br /> aearaaaszasrsawzzasszaarsaawszsawszzsasasmsz:sasssasazsawsaassmssaga=amaasasaamzaaazaswzzassa:aramaaawazamawaassamzaarrzzammzzaaasszmzssasaaraasaarzaraazssazzaaaaasa <br /> TB 43/22/89 NA NA NA N0<500 --- ND<O.2 ND<0.2 ND<0.2 ND40.4 ND<0 1 ND<0.2 •.. --- ND<1 +•. CCAS <br /> TS 06/12/69 NA NA NA ND<50 --- NDc0.2 ND<0.5 ND<O.1 ND<O 2 ND<O.1 ND<O 1 ... .-• ND<0.5 --- CCAS <br /> TB 09/07/89 NA NA NA ND<50 --- ND<1.0 ND<0.5 ND<O.1 ND<0.2 ND<O 1 ND<0.1 ND<0.5 .-- CCAS <br /> TO 12/18/89 NA NA NA ND<50 --- ND<0.5 ND<O 5 ND<0.5 ND<0.5 ND<0.5 ND<O 5 --- -_- PACE <br /> TO 03/20/90 NA NA NA ND<50 --- ND<0 5 Noc0.5 ND<O 5 ND<O 5 -ND<0.5 ND<0.5 ... ND<O 2 PACE <br /> TB 07/03/90 NA NA NA ND<50 --- ND<0.5 ND<O 5 ND<0.5 ND<O 5 - --, ... PACE <br /> TB ]0/19/90 NA NA NA ND<50 --- ND<0 5 N0<0.5 ND<O 5 ND<O 5 ._. .-- __- _._ .-_ PSAL <br /> ACE <br /> TB 01/17/91 NA NA NA ND<50 •-- ND<0.5 ND<0.5 ND<0.5 ND<0.5 <br /> T8 03/19/91 NA NA NA --- --- _-- --' --- --- --- --- --- ..• SAL <br /> TO 07/18/91 NA NA NA ND<50 --- ND<0 5 ND<O 5 ND<0.5 ND<0.5 --- SAL <br /> TB 10/31/91 NA NA NA ND<50 --- ND<0.5 ND<O 5 ND<0.5 NDcO 5 --- ... --- --- ... _•. SAL <br /> TO 01/16/92 NA NA NA ND<50 --- ND<O 5 1.8 ND<0.5 ND<0.5 --- SAL <br /> TB 06/29/92 NA NA NA ND<50 --- ND<0.5 1.8 ND<0.5 ND<0.5 --- --- --- --- --- --- SAL <br /> TB 12/10/92 NA NA NA ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 --- SAL <br /> TB_----.02/04/93--+!u!--------N�------- ----------ND<SO-----__-------------S---------S---���---------------------•----------...---------------------------------�---- <br /> EXPLANATION OF ABBREVIATIONS. <br /> TPH-G :Total Petroleum Hydrocarbons as Gasoline F113 .Freon 113 <br /> (EPA method 8015 modified) TCE -Trichloroethylene <br /> TOG -Total Olt and Grease (EPA method 503D NI 503E) --- Not Analyzed/Not Measured <br /> 8 :Benzene (EPA method 8020 or 8240) D :Duplicate <br /> ' T :Toluene (EPA method 8020 or 8240) NA Not Applicable/Not Available <br /> E :Ethytbenzene (EPA method 8020 or 8240) ND *Not Detected <br /> X :Xylenes (EPA method 8020 or 8240) TB -Trip Blank <br /> 1,2-DCA:1, 2-Dichloroethane SAL Superior Analytical Labs <br /> 1,2-DCB:1, 2-Dichlorobenzene CCAS :Central Coast Analytical Service <br /> 1,3-DCB:1, 3-Dichiorobenzene PACE PACE Analytical Laboratory <br /> 1,4-DCB.1, 4-Dichlorobenzene * :Does not match typical gasoline pattern <br /> Note: Top of casing and ground water elevations are expressed as feet above mean sea level (NGVD - 1929). ---------------------- <br />