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• i <br /> SUMMARY OF GROUNDWATER MONITORING DATA <br /> Forth Quarter 1993 <br /> ARCO Service Station#2168 <br /> 441 Charter Way,Stockton <br /> (micrograms per liter(ug/1), unless noted) <br /> Floating Total <br /> Well ID Depth to Product Oil& Hydrocarbons, 1,2- 1,2- <br /> and!Sample Sampling Water Thickness Ethyl- Total TPH as Grease rR Dichloro- Dichloro- <br /> De th Date feet Feet Benzene Toluene benzene Xylenes Gasoline m m ethane propane <br /> MW-1 (54) 10/18/93 3973 - - 8,900 1,200 830 2,300 31,000 - - -- 54 05 <br /> MW-2(53) 10/28/93 4009 -- 3,600 2,300 320 1,500 17,000 11 11 17 69 <br /> MW-3 (54) 10/18/93 3846 -- 14,000 1,900 2,000 4,200 46,000 - - -- 07 ND <br /> MW4 (59) 10/28/93 4178 -- 11,000 20,000 2,700 13,000 90,000 -- -- 73 30 <br /> MW-5(55) 10/28/93 3846 - - 9,200 9,000 1,200 6,700 60,000 -- -- 210 12 <br /> MW-6(47) 10/18/93 3708 -- 15,000 20,000 1,600 11,000 93,000 - - -- 690 c50* <br /> MW-7(48) 10/28/93 38 11 -- 3,100 9,300 970 6,000 42,000 -- -- 67 48 <br /> TPH=Total petroleum hydrocarbons <br /> ND= Not detected <br /> *=Raised MRL due to high analyte concentration requiring sample dilution <br /> 0671-038 01 <br /> I <br /> I <br /> i <br />