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Project No 58475-06-24F <br /> July 16,2003 <br /> Page 3 of 3 <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 MTBE FOCs <br /> I D DATE MSL (feet) MSL (µg11) (Jig/1) (µg1]) Gµ8/1) (9911) Gt9l) (1,1911) (lad) <br /> (feet) (feet) <br /> VW-1 5110102 21 98 4909 -27 1 I <50 210 <0 5 <05 <0 5 <0 5 <5 ND <br /> VW-1 7110102 21 98 5076 -2878 190 64' 056 <0 5 072 1 75 <5 ND <br /> VW-1 1013102 21 98 5271 -3073 120 180 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-1 12/12/02 21 98 5260 -3062 170 <50 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-1 3118/03 21 98 51 57 -2959 110 <50 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-1. 6117103 21 98 5173 -2975 130 <50 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-2 5110102 22 18 4928 -27 10 <50 2,200 200 <0 5 64 90 120 TAME=60 <br /> VW-2 7/10102 22 18 5098 -2880 5,700 810, 1,600 13 560 568 89 ND <br /> VW-2 1013/02 2218 5292 -3074 4,800 2,100 1,500 15 460 490 44 ND <br /> VW-2 12112!02 2218 5291 -3063 5,700 2,400 l 800 23 520 610 30 ND <br /> VW-2 3118/03 22 18 5178 -2960 8,900 3,900 2,400 18 710 880 47 ND <br /> VW-2 6117/03 2218 5194 -2976 9,900 2,100 2,800 20 910 660 74 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,ethy{benzene 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(ETBE),di-isopropyl ether(DIPE)and tert-butanol(TBA)following EPA Test Method 8260 <br /> µg11—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 diesel pattern However,quantification is based on a diesel standard' <br /> 11 <br />