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Page 7 of 7 <br /> I <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Station 04932 <br /> 16 E Harding Way <br /> Stockton Californm <br /> �� wen Depth Groundwater LPH Groundwater Efhyl• Xylenes MTBE MtBE <br /> We% �Oahe�- .�y`. Etnratdon�fa Water Ehvation Thickness Elevation TPtig t3enzme Toluene benzene (tota8 8020 (802018260) <br /> EYV6 t 120102 P NS 31 07 - 000 - 26 000 390 1500 1200 6 200 440 280 0 43 � <br /> 01130103 P 2973 000 26 000 ' 1 800 25M 1 500 6200 720 600 083 <br /> 04128/03 2920 - 000 - Well unable to be sampled connected to remedial system <br /> 07!29103 NP - - 4 300 ° 220 57 17 87 - 1 000 - <br /> 10108 17103 3232 - 000 - Insufficient amount of water in well for sample collection <br /> 01112/04 dry _ = Insufficient amount of water in well for sample oollectron <br /> mom 2995 <2 500 63 <25 <25 425 250 - <br /> 07113104 NP 3278 - - .283 <5 000 98 76 <50 160 - 4 700 - <br /> EW 7 09!03/43 NS - - - - 74 000 <2500 <2500 <2500 <2500 - 170 000 - <br /> 12J43103 - - - - 31 000 <1000 <1000 <1000 <1000 - 90 000 - <br /> 01/12/44 3175 - -- - 44 400 42500 42500 <2500 <2500 - 110 000 - <br /> 4250 000 <2500 42500 42500 K2500 - 150 000 <br /> 4425104 3017 - - 158 -- <br /> 07113104 NP 1109 dry - - -- <10 000 <100 <100 <100 <100 - 5200 - <br /> QCTB 04118/03 -- - - - - <50 <0 50 <0 50 <0 50 <0 50 - <0 50 - l <br /> 07128ffir -- - _ _ - <50 <0 50 <0 50 <0 50 <0 50 - <0 50 - <br /> 10/09/03 - - - - - 450` -050 <0 50 40 50 <0 50 - - - <br /> 01/13/04 -- - - - - <50 <0 50 -050 <0 50 <0 50 - <0 50 - <br /> 0426104 - - -- - -- <50 <0 50 <0 50 <0 50 <050 - <0 50 - <br /> 07113104 - - - -- - <W <0 50 <0 So <0 50 <0 50 -- <0 5o - <br /> Notes. <br /> TPHg-Total petroleum hydrocarbons as gasoline MSL-mean sea level 8020=anatyzed by EPA Method 8020 <br /> MTBE-Methyl tertiary butyl ether TOC-top of casing 8260-analyzed by EPA Method 8260 <br /> DO a Dissolved oxygen ppb a parts per billion <-below given laboratory detection limit <br /> LPH-liquid phase hydrocarbon mg1L-milligrams per liter NS-not surveyed <br /> If=feet PMP-purgedlnol purged -=not measured or analyzed <br /> =analyzed using EPA Method 8280 <br /> =Hydrocarbon pattern Is present in the requested fuel quanbUrtlon range but does not resemble the pattern of the requested fuel <br /> '=groundwater elevation corrected by adding 0 77 X product thickness <br /> `=Discrete peak®CB C7 <br /> 'm This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> '=The conn entraflon indicated for this analyte is an estimated value above the calibration range of the instrument <br /> '•Gasoline C6-C10 <br /> °=Discrete peak®C5-C6 <br /> '=Laboratory reported result as possibly biased high due to the continuing calibrabon verification falling outside acceptance criteria <br /> ' Sampled after groundwater belch extraction activities <br /> I <br /> ProdecVARCO/4932IReportslfabW,4C 04 gvnabks4932 As <br />