Laserfiche WebLink
Limited Subsurface Environmental. Investigation October 3, 1990 <br /> ARCO Service Station No. 6020, Manteca, California AGS 30055-1 <br /> The concentrations of hydrocarbons in soil samples are presented in Table 2. TPHg <br /> concentrations ranged from below detection limits to 3.73 ppm. Results indicated the <br /> concentrations of BTEX compounds were below 1.0 ppm in the soil samples submitted for <br /> analyses. Results of analyies of the composite sample indicate total xylene isomers were <br /> detected at 0.034 pprn,the concentrations of other constituents were below detection levels. <br /> CONCLUSIONS <br /> Subjective evidence such as odor and discoloration was not noted in the field and <br /> hydrocarbons were not detected with the PID in the soil samples collected. Eased on the <br /> results of our field investigation and laboratory analyses, we conclude that gasoline <br /> hydrocarbons do not appear to be present in tl a soil near the existing and proposed tank <br /> cavities in concentrations warranting remediation in the areas investigated. Ground water <br /> may be encountered if the excavation of the existing tank cavity exceeds 18 feet. <br /> i <br /> I <br /> 8 <br /> .Applied GeoSystems <br />