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i <br /> LEGEND <br /> Existing site facilitieslfeatures <br /> r Previously existing site features/features; <br /> L— J removed about 1955 unless otherwise noted. <br /> • Existing monitoring well <br /> MW-4 <br /> \ Area in which gas plant residues <br /> (or their constituents) were detected in <br /> the fill and/or native soils beneath the <br /> CENTER STREET " fill during 1988 investigation at <br /> concentrations of total PNA's greater than <br /> LAMPBLACK LAMPBLACK <br /> 200 mg/kg (Ppm) <br /> STORAGE SEPERATOR <br /> MW-3 - <br /> _ <br /> JI PREVIOUS <br /> �-I I PROPERTY BOUNDARY <br /> 1 STAR PIT"•. :. :;: PRE-1964 <br /> .:.:� :'-.::"'-': FUEL TANK 2 <br /> TANK EXCAVATION <br /> rUDGAS/OIL SUMP <br /> W <br /> PURIFIERS <br /> r, STORAGE•'::_•-_:"•__•-. •.:'.:.:::.::.:.-•:: -.•:_••:.. . <br /> STORAGE TANK. , <br /> OIL TANK <br /> BUILDING �� -•'.::=..•".::. ..=.'::_•:_.:.:::..- <br /> = <br /> I U I MW-2 -':•:•::� .-::.-.-::-_ :..::_• :: .:;:-". GAS HOLDER <br /> •��1 �':-- :': :::: :'.-. ._: •-..• .: .-' :-:-_:-(Removed between � j <br /> - .•. •.• 1917 and 1930) <br /> / \ <br /> —�~�`• . ., ,. ." :..:LAMPBLACK PIT / Q <br /> / GAS HOLDERIS <br /> I I ti <br /> / AHOLDER SEPERATOR N <br /> LAMPBLACK <br /> MW-1 <br /> FUEL TANKS 1 & 3 MW-1D <br /> EXCAVATION <br /> COMMERCE STREET <br /> SOURCES: (Former facility locations) <br /> Sanborn Maps dated 1917, 1946, and 1950. <br /> PG&E, 1930 Contour Map,Stockton Gas Plant, Drwg.No.480768. <br /> Stockton Assessor's Map 137,Pages 31-32. <br /> FIGURE 3-3 <br /> Z EXTENT OF <br /> GAS PLANT RESIDUES <br /> BASED ON PREVIOUS INVESTIGATIONS <br /> 0 30 50 <br /> STOCKTON MGP SITE <br /> SCALE IN FEET <br /> CKMHIU <br /> SAG31614.WP <br />