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SUMMARY OF GROUNDWATER MONITORING DATA <br /> Fourth Quarter 1993 _ <br /> ARCO Service Station#434 <br /> 501 West Kettlemen Lane, Lodi <br /> (micrograms per liter(pgA),unless noted) <br /> I <br /> Floating <br /> Well ID Depth to product <br /> and Sample Sampling Water Thickness Total TPH as <br /> De th Date tee! feet Benzene Toluene Eth (benzene Xylenes Gasoline <br /> W-1A(77) 2123193 6404 ND ND ND ND ND <br /> W-2 well obstructed <br /> W 2A DRY <br /> W-213(86) 2/22/43 6384 ND ND ND ND ND <br /> W-3(68) 2123193 6353 <1** ND ND ND ND <br /> W-4 DRY <br /> ' W-5(69) 2/22/93 6338 ND ND ND ND ND <br /> W-6(69) 2/22193 6358 ND ND ND ND ND <br /> W-7(69) 2122193 6290 ND ND ND ND ND <br /> W-8(69) 2122193 6257 ND ND ND ND ND <br /> W-9(78) 2/23193 6543 ND ND ND ND ND <br /> W-10*** <br /> W-11 (79) 223193 6354 ND ND ND ND ND <br /> W 12(77) 2122193 6397 ND ND ND ND ND <br /> TPH=Total petroleum hydrocarbons <br /> ND=Not detected <br /> *=Water level survey completed on February 22 1993,with the exception of well W 9,which was surveyed on February 23 dui,to iLccss utnstr,unts <br /> **=Raised MRL due to rttatnx interference <br /> ***=Well MW til was tnalC45Stbli. <br /> Sampltngboc OG71 017 01 <br /> 1 <br />