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�.r �� wr ■� � � ��t �rt� t�t�r rr�r r�r �r r=r 1�I �■� � f� rm�wl I�f <br /> Project No S8475-06-241 • <br /> December 29,2003 <br /> Page 4 of 4 <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 /> 1 D DATE MSL (feet) MSL (µg11) (99l1) (µ9l1) (140) (90) <br /> (feet) (feet) <br /> VW-2 6117103 2218 5194 -2976 9,900 2,100 2,800 20 910 660 74 ND <br /> VW-2 913103 22 18 5326 -3108 4,700 1,400 1,300 17 500 230 38 ND <br /> VW-2 11/19/03 22 18 5405 -3187 5,200 1,700 I,S00 79 540 240 34 ND <br /> Notes TOC=Top of Casing µg11=Micrograms per Mer <br /> MSL=Mean Sea Level ND=Not detected above the laboratory test method detection limit <br /> TPHg=Total petroleum hydrocarbons as gasoline <=Less than laboratory method detection limit <br /> TPHd=Total petroleum hydrocarbons as diesel <br /> BTEX=Benzene,toluene,ethylbenzene and total xylenes <br /> MTBE=Methyl tent-butyl ether by EPA Test Method 8260 <br /> FOCs=Tert-amyl methyl ether(TAME),ethyl tert-butyl ether(ETBE),di-isopropyl ether(DIPS)and tert-butanol(TBA)following EPA Test Method 8260 <br /> _"Sample contains hydrocarbons that do not match the diesel pattern However,quantification is based on a diesel standard" <br /> I <br /> I <br />