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c <br /> Problem Assessment Report November 20, 1990 <br /> Fire Engine Company No. 2, Stockton, California AGS 38009-2 <br /> TABLE 10 <br /> CONCENTRATIONS OF HYDROCARBONS IN WATER SAMPLES <br /> Fire Engine Company No. 2 <br /> 110 West Sonora Street <br /> Stockton, California <br /> Sample Ethyl- Total Organic <br /> Number TPHg TPHd Benzene Toluene benzene Xylenes Lead <br /> December 22, 1988 <br /> W-31-MW1 '33,7Q 79 4,600 3,840 870 2,480 <0.05 <br /> W-30-MW2f 30 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <br /> W-30-MW3 < 0 <0.0p, <0.05 <0.05 <0.05 <0.05 <0.45 <br /> May 31, 1990 <br /> W-38-MW4 .240 <0.05 <0.05 1.1 ,,1 <0.05 1.5 NA <br /> Results in arts er billion b) <br /> TPEid = Total petroleum hydrocarbons as diesel <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> NA = Not analyzed <br /> < = Less than the detection limit for the analytical <br /> methods used <br /> Sample designation: <br /> W-30-MW1 <br /> �-- Monitoring well number <br /> L— Sample depth in feet below ground surface <br /> L–— Water sample <br /> The concentration of TPHd and BTEX compounds were below detection limits in the water <br /> -' samples collected from wells MW-2 and MW-3. TPHg was detected at 30 ppb in the sample <br /> from well MW-2 (W-30-MW-2) and was below detection limits in the sample from well <br /> MW-3 (W-30-MW-3). <br /> In the sample from well MW-4 (W-38-MW-4), TPHg was detected at 240 ppb; TPHd, <br /> benzene,and ethvlbenzene were below detection limits. It is passible the detection of TPHd <br /> 24 <br /> APP1 ed 0e®SySterr7S <br />