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i ii <br /> Project N0. 8475-06-24C <br /> January 23,2003 <br /> Page 2 of 2 <br /> TABLE I <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 TPI-Id B T E X MTBE FOCs <br /> I D DATE MSL {feet) MSL (119/1) (µgfl) (Jig/]) (µgfl) (µg11) (µg/1) (lam) (irk) <br /> (feet) (feet) <br /> MW-9 5/10102 2080 4783 -2703 <50 <100 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> MW-9 7/10102 2080 4950 -2870 <50 57' <0 5 22 <0 5 069 <5 ND <br /> MW-9 1012102 2080 5147 -3067 <50 <50 36 l 8 06 12 <5 ND <br /> MW-9 12/12/02 2080 5141 -3061 <50 <50 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> MW-10 5/10102 2179 4898 -27 19 <50 <100 <05 <0 5 <0 5 <0 5 <5 ND <br /> MW-10 7/9102 21 79 5077 -2898 61 541 20 28 083 226 <5 ND <br /> MW-10 1013/02 21 79 5270 -3091 <50 <50 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> MW-10 12/11/02 21 79 5258 -3079 <50 <50 79 50 1 6 47 <5 ND <br /> i <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-1 1 7110/02 21 49 5030 -2881 <50 <50 <0 5 1 4 <0 5 063 <5 ND <br /> MW-11 10/2102 21 49 5228 -3079 <50 <50 20 1 2 <0 5 <0 5 <5 ND <br /> MW-1 1 12/11/02 21 49 52 17 -3068 100 <50 18 14 42 13 <5 ND <br /> MW-12 5/10/02 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 10/2/02 22 82 53 13 -3031 <50 110 59 26 07 20 <5 ND <br /> MW-12 12/11/02 2292 5305 -3023 <50 <50 28 2 1 07 1 8 <5 ND <br /> VW-1 5110102 2198 4909 -27 11 <50 210 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-1 7/10102 2198 5076 -2878 190 641 056 <0 5 072 175 <5 ND <br /> VW-1 10/3/02 21 98 5271 -3073 120 180 <0 5 <0 5 <0 5 <0 5 <5 ND <br /> VW-1 12/12/02 2198 5260 -3062 170 <50 <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 7/10102 2218 5098 -2880 5,700 810' 1,600 13 560 568 89 ND <br /> VW-2 10/3/02 2218 5292 -3074 4,800 2,100 1,500 15 460 490 44 ND <br /> VW-2 12/12/02 2218 5281 -3063 5,700 2,400 1,800 23 520 610 30 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-hutyl ether(ETBE),di-isopropyl ether(DIPE)and tert-butanol(TBA)following EPA Test Method 8260 <br /> µg/l=Micrograms per Mer <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 />