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Evaluation of Hydrocarbons January 29, 1991 <br /> Waterfront Redevelopment, Stockton, California AGS 39048-2 <br /> TABLE 2 <br /> RESULTS OF CHEMICAL ANALYSES OF <br /> GROUND-WATER SAMPLES <br /> Waterfront Redevelopment Property <br /> West Weber Avenue and North Lincoln Street <br /> Stockton, California <br /> Sample Ethyl- Total <br /> Number TPHg TPHd Benzene Toluene benzene Xylenes <br /> W-21-MW1 1, 000 140 6 . 7 5 . 2 14 29 <br /> W-23-MW2 87 <100 <0. 50 12 6 . 6 27 <br /> W-28-MW3 <20 <100 <0. 50 <0. 50 <0 . 50 <0 . 50 <br /> W-21-MW4 91, 000 38 , 000 3 , 400 13 , 000 2 , 800 14 , 000 <br /> W-23-MW5 7 , 700 680 47 6 . 7 23 15 <br /> W-33-MW6 47 , 000 23 , 000 18 7 , 400 3 , 100 12 , 000 <br /> W-15-MW7 <20 <100 <0 . 50 0 . 73 <0 . 50 2 <br /> All results in parts per billion (ppb) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> TPHd = Total petroleum hydrocarbons as diesel fuel <br /> < = below detection limits for the analytical method used <br /> Sample designation: <br /> W-21-MWl <br /> Monitoring Well Number <br /> Sample depth in feet below ground surface <br /> Water sample <br /> Ground-Water Flow Direction and Gradient <br /> On July 24, 1990, an Applied GeoSystems geologist measured depths to ground water in the <br /> monitoring wells to the nearest 0.01 foot with a Solinst water-level indicator. These depths <br /> to water were combined with the elevation of each well casing relative to mean sea level as <br /> surveyed by Tom Morrow Surveying of West Sacramento, California, to calculate the <br /> i <br /> 17 <br /> Applied GeoSystems <br />