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MNN1eMM = MMMV M M i M M = Mir <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station#4932 <br /> 16 E Harding Way <br /> Stockton California <br /> Well Depth Groundwater LPH Groundwater Ethyl- Xylenes MtBE MtBE <br /> f Well Date Elevation to Water Elevation Thickness Elevation TPHg Benzene Toluene benzene (Ictal) 8020 (802018260) DO <br /> Number Sampled _(it MSS (ft TOC) (ft MSL) (ft) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) m 1 <br /> EW-6 11/20/02 P NS 31 07 — 0 00 28 DDD 390 1 500 120-0 6400 440 260 043 <br /> 01/30/03 P 2973 000 — 26 DOD S 1 800 2 500 1 500 6200 720 600 083 <br /> D4128103 2920 — 0 DO — Well unable Yo be sampled connected to remedial system <br /> 07129103' NP — — — — 4 300 5 220 57 17 87 — 1 o00 — <br /> 1 OM8 17103 32 32 — 000 — Insufficient amount of water in well for sample collecton <br /> 0 V12104 dry -- — — Insufficient amount of water in well for sample collection <br /> 04/26/04 2995 — — <2 500 63 <25 <25 -25 — 250 — <br /> 07/13l64 NP 3278 — — 283 -5000 98 76 <50 160 — 4 700 — f <br /> 10/27/04 NP 3443 — — 165 <2500 <25 -25 <25 66 — 1500 — -U( <br /> 01/12/05 NP dry — — -- Insufficient amount of water In well for sample collection <br /> EW 7 09/03/03 NS — — — -- 74 000 <2500 -2500 -2500 <2500 — 170 000 — <br /> 12r03103 — — — 31 DOD -1000 -1000 <1000 <1000 — 90 000 — <br /> 01112fD4 3175 — » — 44 ODD <25DO -2500 <2500 -2500 — 110 000 — <br /> 04/26/04 3017 — — 1 58 <250 000 -2500 -2500 -2500 -2500 — 150 000 » <br /> 07/13/04 NP 1109 dry -- — -10000 <100 <1D0 <100 <100 — 5200 — <br /> 10/27/04 NP 3686 25 77 — -- <25 000 -250 -25D <250 <250 — 27 000 _ 7 <br /> 01113105 NP — — — — — 810 <50 <50 <50 <50 — 1900 -- <br /> QCTB 04/28/03 — — — — — <50 -050 -050 <4 50 <0 50 — <0 50 -- <br /> 07/28103 — — — — -- <50 <0 50 -050 <O 50 <0 50 — <0 50 — <br /> 10l09/03 — — — — — <50 -0 50 -050 <0 50 <0 50 — -- -- <br /> 01/13l04 — — — » -- <50 -050 -050 <0 50 <0 50 — <0 50 — <br /> 04126l04 — — — — » <50 <0 50 <0 50 <0 5D <0 50 — <0 50 — <br /> 07/13104 » — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 11110104 — — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 01112M5 "" — — — — — <60 <0 So <0 50 <0 50 <0 50 -- c2 5 <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline MSL=mean sea level 8020=analyzed by EPA Method 8020 <br /> MTBE=Methyl tertiary butyl ether TOC=top of casing 8260=analyzed by EPA Method 8260 <br /> DO=Dissolved oxygen ppb=parts per billion -=below given laboratory detection limit <br /> LPH=liquid phase hydrocarbon mg/1,=milligrams per Icer NS=not surveyed <br /> It=feet PIMP=purgedlnot purged —=not measured or analyzed <br /> =analyzed using EPA Method 8260 <br /> =Hydrocarbon pattern is present in the requested fuel quantdaton range but does not resemble the pattern of the requested fuel <br /> '=Analyzed using EPA Method 80156180219 <br /> =Groundwater elevation corrected by adding 0 77 X product thickness <br /> '=Discrete peak @ C6 C7 <br /> '=This sample was analyzed beyond the EPA recommended holding lime The results may still be useful for their intended purpose <br /> '=The concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> '=Gasoline C13-C10 <br /> "=Discrete peak @ C5-C6 <br /> '=Laboratory reported result as possibly bussed high due to the continumg calibration verification falling outside acceptance crrtena <br /> "=Sampled after groundwater batch extraction activities <br /> 11ProieM1ARCOl493ZTablestQMR Tables41Q05 gwtables4932 As Page 7 of 7 <br />