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File No 93342-SGI Page 6 <br /> 2.4 WELL SURVEY <br /> IIt is typical that h <br /> yp the groundwater flow follows the ground surface topography, following in <br /> ' a north direction toward the delta However, to provide site specific groundwater flow <br /> direction and gradient, top of casing of the three monitoring wells at the site will be <br /> surveyed in respect to the mean sea level At this time utilizing triangulation procedure, the <br /> groundwater flow direction and gradient will be established for the site The subject well <br /> will be surveyed by a registered engineer utilizing City of Tracy Bench Mark <br /> 3.0 LABORATORY METHODS <br /> State-Certified Priority Environmental <br /> Labs and Superior Laboratory, will be utilized to <br /> perform testing on soil and groundwater samples obtained from the site Soil and <br /> groundwater samples will be analyzed for total petroleum hydrocarbons as gasoline and <br /> diesel plus BTEX (Benzene, Toluene, Ethyl-Benzene, and Xylenes), Methods 5030, 3550, <br /> 8015, and 8020 Also soil and groundwater samples will be analyzed for Lead, method 7420 <br /> 4.0 SOIL PROFILE <br /> A detailed soil profile will be presented in our report for the site <br /> 5.0 HYDROGEOLOGY <br /> Hydrogeology of the site and vicinity will be discussed in the report <br /> 1 ADVANCE SOIL TECHNOLOGY, INC <br />