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'loge 5 of 6 <br /> Table 1 <br /> Groundwater Elevation and Analytical Data <br /> Former ARCO Station No 4493 <br /> 205 North Center Street,Stockton,California <br /> Well Depth Groundwater Groundwater Ethyl- Xylenes MtBE MtBE <br /> Well Date Elevation to Water Elevation Elevation TPHg Benzene Toluene benzene (total) (8020) (8260) DO <br /> Number Sampled ft,MS! ft,TQC ft,MS! Change(ft) (pg/L) UgAL) 419/L) Lug/L) 019/L) UgAL) (ptA) (m <br /> MW-100 6/12/2002 NP 1064 1421 357 -- 87 1 9 <0 5 <0 5 <0 5 31 <br /> 9/16/2002 NP 1465 -401 -044 <50 <0 5 <0 5 <0 5 <0 5 -- 1 6 -- <br /> 12/5/2002 P 1596 -532 -131 <50 <0 5 <0 5 1 1 <0 5 1 0 2 3 <br /> 3/14/2003 P 1589 -525 007 <50 <0 5 <0 5 <0 5 <0 5 064 1 0 <br /> 6/9/2003 P 1535 -4 71 0 54 <50 <1 0 <1 0 <1 0 <1 0 -- <1 0 1 4 <br /> 9/25/2003 P 1566 490 -019 <50 <1 0 <1 0 <1 0 <1 0 <1 0 14 <br /> 12123/2003 P 1633 -669 -067 <50 <1 0 <1 0 <1 0 <2 0 - <1 0 2 9 <br /> MW-11M 12/512002 P 11 76 20 42 -866 -- <50 <1 0 <1 0 <1 0 <10 -- 55 4 1 <br /> 3/14/2003 P 20 36 -860 006 130 <1 0 <1 0 <1 0 <1 0 110 09 <br /> 6/9/2003 P 2039 -863 -003 <50 <50 <50 <5 0 <5 0 130 1 2 <br /> 9/25/2003 P 21 20 -944 -081 65 R <5 0 <5 0 <5 0 <5 0 150 08 <br /> 12123/2003 P 21 53 -977 -033 70 R <1 0 <1 0 <1 0 <2 0 -- 100 1 7 <br /> MW-11 D 12/5/2002 P 1172 20 64 -892 - <50 <1 0 <1 0 <1 0 1 1 -- 2 2 3 2 <br /> 3/14/2003 P 2041 -869 023 <50 <0 5 <0 5 <0 5 <0 5 - 3 5 32 <br /> 6/9/2003 P 2033 -861 008 <50 <1 0 <1 0 <1 0 <1 0 -- 1 3 5 2 <br /> 9/25/2003 P 2107 -9 35 -074 <50 <1 0 <1 0 <1 0 <1 0 <1 0 1 4 <br /> 12/23/2003 P 21 47 -975 -040 <50 <1 0 <1 0 <1 0 <2 0 -- 1 9 4 3 <br /> MW-12D 12/23/2003 P 2524 -- — 52 1 8 1 7 21 16 — 22 21 <br /> TB-11 12/31/2001 -- -- <50 <0 5 <0 5 <0 5 <0 5 -- - <br /> QCTB 3/13/2002 -- - <50 <0 5 <0 5 <0 5 <0 5 <br /> Notes <br /> = analyzed using EPA Method 8260 MSL = mean sea level <br /> < = below given laboratory detection limit MISE = Methyl tent butyl ether <br /> -- = not measured/analyzed or not applicable NS = not surveyed <br /> DO = dissolved oxygen,post-purge P/NP = purged/not purged <br /> ft = feet TOC = top of casing <br /> GRO = gasoline-range organics TPHg = total petroleum hydrocarbons as gasoline(reported as GRO gasoline range organics) <br /> mgtL = milligrams per liter pg/L = micrograms per liter <br /> 8020 = Analyzed by EPA Method 8020 <br /> 8260 = Analyzed by EPA Method 8260 <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 coeluting organic compounds present in the sample extract <br /> Beginning 2nd quarter 2002,an analytical data review summary is included in the tent <br /> K lwprocessU5 BP ARC054 MWell InstaR4493 OWMR 4003 <br />