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�e 5 of.5 � <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> ARCO Service Stabon 9695 <br /> 6100 N Highway 99 Stockton CA <br /> Well Depth Groundwater Groundwater Ethyl Xylenes MtBE MtBE <br /> Well Date Elevabon to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) DO <br /> Number Sampled (ft MSL) (fl,TOC) (ft MSL) Cha (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (m !L) <br /> WSW f 122000 — — — — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 0 — <br /> 3152001 NP — — — — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 <br /> 51820011 NP — — -- -- <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 213 <br /> 8112001 NP — — -- — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <2 0 — <br /> 10/232001 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 225 <br /> 2112002 NP — — — -- <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — <br /> 4/112002 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — <br /> 7/162002 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 -- <br /> 1022002 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 111712003 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — <br /> 4/3/2003 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 7222003 NP — — -- — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 1022003 NP — — — — <50(b) <0 50(b) <0 50(b) <0 50(b) <0 50(b) — <0 50(b) — <br /> 1/92004 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 41P12004 P — — -- -- <50 <0 50 <0 50 <0 50 <0 50 — 0 81 -- <br /> QCTB 1022003 — — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 1022003 — — — — — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 1192004 — — — — -- e50 <0 50 <0 50 <0 50 <0 50 — <0 50 — <br /> 412/2004 -- -- -- -- — <50 <0 50 <0 50 <0 50 <0 50 <0 50 -- <br /> Notes <br /> TPI-Ig=Total petroleum hydrocarbons as gasoline <br /> MtBE=Methyl tert-butyl ether —=not measured or analyzed <br /> DO=Dissolved oxygen <=below given laboratory detection limit <br /> EPA 8020=analyzed using EPA Method 6020 PIMP=purged/not purged <br /> EPA 8260=analyzed using EPA Method 8260 mg/L=milligrams per liter <br /> ft=feet ppb=parts per billion <br /> MSL=mean sea level TB-1=Trip Blank <br /> TOC=top of casing WSW=Water supply well <br /> =Hydrocarbon pattern is present in the requested fuel quantitation range but does not resemble the pattern of requested fuel <br /> (a)=Chromatogram Pattern Gasoline C6-C10 <br /> (b)=This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose <br /> (c)=Discrete peak @ C6-C7 <br /> (d)=Laboratory reports sample with a possible high bras due to the contnuing calibration verification falling outside acceptance criteria <br /> (e)=This sample was onginally analyzed with a positive result,however the reanalysis did not confirm the presence of the analyte <br /> (f)=The sample aliquot was taken from a VOA vial with headspace(air bubble greater than 6 mm diameter)which may have resulted in the lass of volatile analysis <br /> 11ProlecfstARCO15951ReportslTables=04gwtables595 xis <br />