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• ge3of3 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Service Station#4493 <br /> 205 N Center St,Stockton,CA <br /> We€I Depth Groundwater Groundwater Ethyl Xylenes MtBE MTBE <br /> Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (6020) (8260) DO <br /> Number Sampled (ft MSL) (it TOC) (ft MSL) Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (mg/L) <br /> MW 9D 6/12/2002 P 1298 1643 345 — 460 27 46 69 7 4 — 22 <br /> 9M&/2002 P 1705 -407 -0 62 140 5 7 <1 <1 <1 — 50 <br /> MW 10M 6/12/2002 P 1076 1493 -417 430 12 087 <0,50 1 2 — 5 8 — <br /> 9/16/2002 P 1076 1481 -4 05 012 <50 <1 <1 <1 <1 — 2 6 — <br /> MW 10D 6/12/2002 NP 1064 1421 3 57 -- 87 1 9 <0 5 <0 5 <0 5 -- 31 911612002 NP 1064 1465 -4 01 -0 44 <50 <0 5 <05 <05 <0 5 — 16 — <br /> TS 1 12/31/2001 — -- — -- <50 <0 50 <0 50 <0 50 <0 50 — <br /> QCTB 3/13/2002 — — — <50 <0 50 <0 50 <0 50 <0 50 — <br /> I <br /> Notes <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> MISE=Methyl tort butyl ether <br /> DO=DicsoWd oxygen <br /> ft=feet <br /> MSL=mean sea level <br /> TOC=top of casing <br /> ppb=pans per billion <br /> mg/L=milligrams per Mer <br /> P/NP=purged/not purged <br /> '=analyzed using EPA Method 8260 <br /> <or ND=below given laboratory detection limit <br /> 8020=Analyzed by EPA Method 8020 <br /> 8260=Analyzed by EPA Method 8260 <br /> NS=Not Surveyed <br /> not measured/analyzed or not applicable <br /> =Sample was reanalyzed past the EPA recommended holding time <br /> `=Hydrocarbon pattern is present in the requested fuel quantification range but does not resemble the pattern of the requested fuel <br /> '=The surrogate recovery for this sample cannot be accurately quantified due to interference form coeluling organic compounds present in the sample extract <br /> Beginning 2nd quarter 2002 an analytical data review summary is included in the text _ <br /> k V5#31'Ni C010440MOUMrertyl2_01IR 021Teble 12-3 <br />