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Elbm m m m m m m m m MWO M <br /> Project No S8475-06-24K <br /> June 22 2004 <br /> Page 4 of 4 <br /> TABLE l <br /> SUMMARY OF GROUNDWATER ELEVATION AND ANALYTICAL DATA <br /> SHOP 10 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) (9g1]) (go) (µ9/1) (µg/1) (µg11) (µg11) (µg/1) <br /> (fes) (fed) <br /> VM-2 10/2/02 --- 5204 --- 12,000 4,800 5,300 17 710 160 <20 ND <br /> VM-2 12/11/02 --- 5200 -- 11,000 1,800 4,800 64 600 250 <20 ND <br /> VM-2 3/17/03 -- 5090 -- 2,300 740 840 85 120 26 <5 ND <br /> VM-2 6/16/03 --- 5112 3,900 850 1,500 15 220 61 <5 ND <br /> VM-2 9/2/03 --- 5245 - 3,400 2,400 1,200 50 I50 160 <5 ND <br /> VM-2 11/18/03 5329 - 4,400 1,500 1,500 92 180 230 <5 ND <br /> VM-2 3/23/04 5110 — 4,400 1,900 1,100 86 150 240 <5 ND <br /> VM-2 5126104 5185 — 6,920 1,210 2,300 135 343 500 <5 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 cert-butyl ether(ETBE),di-isopropyl ether(DIPE)and tart-butanol(TBA)following EPA Test Method 8260 <br /> µg/I�Micrograms per liter <br /> <,ND=Less than laboratory method detection limit <br /> -=Not available <br /> "Sample contains hydrocarbons that do not match the diesel pattem However,quantification is based on a diesel standard" <br /> i <br /> i <br /> i <br /> I <br />