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MW-3 [NO] <br /> \ 500' / To CITY OF STOCKTON <br /> TO EAST HAZELTON AVE. \111 IRRIGATION WELL <br /> NO <br /> MAINTENANCE AND DISPATCH BUILDING <br /> X00 a <br /> 00 <br /> FORMER` UST No. I <br /> UST No. 3 (GAS) <br /> (GAS) TO <br /> [32.000' <br /> J2.00SOUTH B ST. <br /> 0 0 0 <br /> I <br /> MW-2 <br /> DISPENSER ISLANDS <br /> t 1 \0 0 <br /> FREE PRODUCT <br /> (0.41 FT THICK) 1 MW-1 DIRECTION OF <br /> GROUNDWATER <br /> UST No. 2 FLOW 4" <br /> (DIESEL) <br /> CARWASH AND LUBE/REPAIR BUILDING <br /> UST No. 6 UST <br /> No. 4 TIRE STORAGE BUILDING <br /> UST No. 7 U <br /> UST N . B <br /> CHANNEL MAINTENANCE BUILDING <br /> LEGEND <br /> -� GROUNDWATER MONITORING WELL LOCATION <br /> O EXISTING UST LOCATION <br /> 0 40 80 C_D FORMER UST LOCATION <br /> [32,DO0] CONCENTRATION OF MTBE in ppb <br /> APPROXIMATE SCALE (FEET) -20,000- ISOCONCENTRATION CONTOUR <br /> RA NA C3 E FIGURE 4 <br /> ENVIFRoNMENTaL_ ISOCONCENTRATION MAP <br /> POST OFFICE BOX 869 MTBE IN GROUNDWATER <br /> RANCHO MURIETA, CALIFORNIA, 95683 <br /> (916) 354-3250 NORTH SAN JOAQUIN COUNTY MOTOR POOL <br /> 1810 EAST HAZELTON AVENUE <br /> Date Prepared Drawing Number STOCKTON, CALIFORNIA <br /> 9/26/02 (rev) SJMP—F4 <br />