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=4r M = M M = M I = = = = = M <br /> Project No 58475-06-24D <br /> April 28,2003 <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 /> Notes TOC=Top of Casing <br /> NIS L=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 Cert-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 /> pgll—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 /> I <br /> I <br />