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Project No 58475-06 24B <br /> November 5,2002 <br /> Page 2 of 2 <br /> TABLE 1 <br /> SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA <br /> STOCKTON MAINTENANCE STATION <br /> SAN JOAQUIN COUNTY,CALIFORNIA <br /> TOC DEPTH TO GROUND WATER <br /> SAMPLE SAMPLE ELEVATION GROUNDWATER ELEVATION TPHg TPHd B T E X MTRh FOCs <br /> 1 D DATE MSL DMSL (µg11) {µg11) (µg11) (µg/l} (µg/1) (µg/1) (119/1) (µ9l1) <br /> (feet) (feet) <br /> MW-1 1 5/10/02 2149 4863 -27 14 <50 <100 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> MW-11 7110102 2149 5030 -2881 <50 <50 <0 5 14 <0 5 063 <5 ND <br /> MW-11 1012/02 21 49 5228 -3079 <50 <50 20 12 <0 5 <0 5 <5 ND <br /> MW-12 5/10102 2282 4853 -2571 <50 <100 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> MW-12 7/10/02 2282 51 17 -2835 <50 <50 <0 5 051 <0 5 <0 5 <5 ND <br /> MW-12 1012/02 2282 53 13 -3031 <50 110 59 26 07 20 <5 ND <br /> VW-1 5/10/02 2198 4909 -2711 <50 210 <05 <0 5 <0 5 <0 5 <5 ND <br /> VW-1. 7/10/02 2198 5076 -2878 190 64' 056 <0 5 072 1 75 <5 ND <br /> VW-1 10/3102 21 98 5271 -3073 120 180 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-2 5/10102 22 18 4928 -27 10 <50 2,200 200 <0 5 64 90 120 TAME=60 <br /> VW-2 7/10/02 2218 5098 -2880 5,700 810, 1,600 13 560 568 89 ND <br /> VW-2 1013102 2218 5292 -3074 4,800 2,100 1,500 15 460 490 44 ND <br /> Notes TOC=Top of Casing <br /> MSL=Mean Sea Level <br /> TPHg=Total petroleum hydrocarbons as gasoline <br /> TPHd=Total petroleum hydrocarbons as diesel <br /> BTEX=Benzene,toluene,ethylbenzene and total xylenes <br /> MTBE=Methyl tert-butyl ether by EPA Test Method 8260 <br /> FOCs=Tert-amyl methyl ether(TAME),ethyl tert-butyl ether(ETRE),di-isopropyl ether(DIPE)and tert-butanol(TBA)following EPA Test Method 8260 <br /> µg/1=Micrograms per liter <br /> ND=Not detected above the laboratory test method detection limit <br /> <=Less than laboratory method detection limit <br /> _"Sample contains hydrocarbons that do not match the dtesel pattern However,quantification is based on a diesel standard <br /> I <br /> I <br />