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.� i. Table 1 Groundwater Elevation and Analy6eal Data ARCO Service Station#4932 16 E Harding Way Stockton Caldemla Well Depth Groundwater LPH Groundwater Ethyl- xylenes MtI3E MTBE Well Date Elevation to Water Elevation Thickness Elevatwn TPHg Benzene Toluene benzene (totaq 8020 (802018260) DG Number Sampled (it MSL) ft TOC) (ft,MSL) (fl) change(ft) (ppb) (ppb) (ppb)_- ppb) (ppb) ( b} (ppb) (mglL) EW 5 DIM 2105 P 3364 2218 000 -073 230 -50 <5 0 <5 0 .50 -- 390 -- (cont) 41131200510 P 3046 1900 000 3 18 <50 <0 50 <0 50 <0 50 <0 50 — 58 19 EWE 1120/02 P NS 3107 — 000 28 000 390 1 500 1 200 6200 440 280 043 01130103 P 2973 — 000 — 26 000 s 1 800 2 500 1 500 6200 720 600 083 04/28/03 2920 -- 000 Well unable to be sampled connected to remedial system 07129!03 NP — — — — 4 300 s 220 57 17 87 — 1 000 — 10108-17103 3232 000 -- Insufficient amount of water in well for sample collection 01/12/04 dry -- — — Insufficient amount of water in well for sample collection 04/26104 2995 — — <2 500 63 <25 <25 -25 — 250 — 07113104 NP 3278 — — -283 <5 000 98 76 <50 160 — 4 700 — 10/27/04 NP 3443 — — 165 -2500 -25 <25 <25 66 — 1 5D0 — 01/12/05 NP dry — -- Insufficient amount of water in well for sample cotlecbon 04113105 P 2980 — _ _ 6 900 <50 <50 99 96 — <50 19 EW Y 09/03/03 NS — _ — _ 74000 -2500 -2500 -2500 -2500 — 170000 — 12l03l03 — — _ _ 31 000 <1000 <1000 <low <tDDO — 90 DDO — 01/12104 3175 _ _ 44 000 -2500 -2500 -2500 -2500 — 110 000 — 11026f04 3017 — — 158 <250 000 <25DO <2500 -2500 <25W — 150 000 — 07113104 NP 1109 dry — -- -10000 -100 <100 <100 -100 5200 10/27/04 NP 3986 2577 — — <25 000 <250 <250 <250 <250 — 27 000 — 01113105 NP — — — — — 810 <50 <50 -50 <50 — 1900 -- 4113l2005�° P 3091 1982 — — <50 <0 50 <0 50 <0 50 <0 50 — 90 — OCTB 0412BM3 — — — — <50 <0 50 <0 50 <0 50 <0 50 — '050 — 0728/03' — — _ _ _ <50 <0 50 .050 <0 50 <0 50 — -050 — I Ok9f 2l — — — — _ Sol -050 <0 50 <0 50 <O 50 — — — 01113104 — — — — -- <50 -0 50 <0 50 <0 50 -050 — -050 -- 04/26/44 — — — — — <50 <0 50 <0 50 -050 <0 50 — <O 50 — <50 <0 50 <0 50 <0 50 <0 50 <0 50 07/13/04 — — -- — '" 11/10/04 — _ — — — — <50 <D 50 4 51) <0 50 <0 50 — <O 50 — 01/12105 '"" — — -- — -- <50 <0 50 <O 50 <0 50 <0 50 — <25 — 04M 3105 "' -- — — — — <50 <0 50 <0 50 <0 5o <0 50 — <0 50 Notes, TPHg a Total petroleum hydrocarbons as gasoline MSL=mean sea level 8020=analyzed by EPA Method 8020 M1BE=Methyl tertiary butyl ether TOC=top of casing 8260=analyzed by EPA Method 826D DO=Dissolved oxygen ppb=parts per billion <=below given laboratory detection limit LPH=liquid phase hydrocarbon mg1L=milligrams per liter NS=not surveyed tt=feet PMP=purged/not purged —=not measured or analyzed =analyzed using EPA Method 8260 =Hydrocarbon pattern is present In the requested fuel quantitation range but does not resemble the pattern of the requested fuel Analyzed using EPA Method 80158180216 � '=Groundwater elevation corrected by adding 0 77 x product thickness '=Discrete peak @ C6 C7 'w This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose 4=The concentration indicated for this analyte is an estimated value above the calibration range of the Instrument S=Gasoline Cr C10 °=Discrete peak @ C5-C6 7=Laboratory reported result as possibly biased high due to the continuing calibration verification falling outside acceptance cntena °=Sampled after groundwater batch extraction achvrbes "=Hydrocarbon result partially due to individual peaks In quant range =Insufficient sample available to follow standard QC procedure 11ProtecWAR=49321Tables1QMR Tables12005 gwtables4932 As Page 7 of 7