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�aat4 Table 1 - Groundwater Elevation and Analytical Data ARCO Service Stabon#595 61 DD N Highway 99 Stockton CA Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MWE Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (EPA 8020) (EPA 8260) Do Number Sampled (ft,MSL) (ft,TOC) ft,MSL Change(ft) (ppb) (ppb) (ppb) (ppb) (ppb) ppb (ppb) (mg+L) WSW 11/212000 -- — — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <20 — 3/512001 NP — -- — — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 — 518/2001 NP — -- — — <50 0 <0 500 <0 500 <0 500 <0 500 <2 50 <2 00 2 13 8/1/2001 NP — — -- — <50 <0 50 <0 50 <O 50 <0 50 <2 5 <2 0 -- 10/23/2001 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <1 0 225 711/2002 NP -- — -- — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — 4111I2002 NP — — — — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — 71i 612002 NP -- -- — -- <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — 101212= NP — — -- — <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — 111712003 NP — — .- — <50 <0 50 <0 50 <0 50 <0 50 <2 5 <0 50 — 4I312003 NP — — — -- <50 <0 50 <0 50 <0 50 <0 50 — <0 50 — 712=03 NP — — — _ <50 <0 50 <0 50 <0 50 <0 50 -- <0 50 — Notes, TPHg=Total petroleum trydrocarbons as gasoline MtBE=Methyl tent butyl ether —=not measured or analyzed DO=Dissolved oxygen <=below given laboratory detection limit EPA 8020=analyzed using EPA Method 8020 PIMP=purged/not purged EPA 8260 W analyzed using EPA Method 8260 mg1L=milligrams per liter ft=feet ppb=parts per billion MSL=mean sea level TBA=Tnp Blank TOC=tap of casing WSW=Water supply well =Hydrocarbon pattern Is present in the requested fuel quantitation range but does not resemble the pattern of requested fuel (a)=Chromalogram Pattem Gasoline C6-CIO (b)=This sample was analyzed beyond the EPA recommended holding time The results may still be useful for their intended purpose (c)=Discrete peak Q C6-C7 I I1ProyectsIARC015951RepoMITableslgwta bles595-3003