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a gi id layout not less than 400-feet by 100-feet ASE agrees with this <br /> approach However, the only teasonable method to obtain this data in an <br /> effective inannei is by using a CPT Based on this directive, ASE's scope of <br /> work is as follows <br /> 1) Obtain the necessary drilling permit from San Joaquin County PHS- <br /> EHD <br /> 2) Obtain any necessary access agreements and encroachment permits <br /> to conduct the drilling <br /> 3 ) Drill soil botrngs in at least 25 locations as shown on Figure 4 If the <br /> extent of contamination is not defined with these borings additional <br /> borings will be drilled as necessary <br /> 4) At each location, an initial boi ing will be drilled to depth for t h e <br /> collection of lithologic and hydrogeologic infoimation A second <br /> boi ing will then be di riled in each location for the collection of <br /> watet and/oi soil samples The total depth of each boring is yet t o <br /> be determined and will be discussed with the San Joaquin County <br /> . PHS-EHD prior to dtilling Data considered when determining the <br /> total depth of each boring will include the total depths and screened <br /> intervals of impacted domestic wells (to be determined in the scope <br /> of work outlined in section 2), results from the recently installed <br /> monitoring wells at the site, and results of previous CPT borings as <br /> the pi oject pi ogi esses <br /> 5) Collect discrete groundwater samples from each unit of high <br /> permeability These samples will be collected using a SimalProbe or <br /> other suitable discrete depth groundwater sampler Groundwater <br /> samples will be contained in 40-m1 volatile organic analysis (VOA) <br /> vials, pre-preserved with hydrochloric acid, and sealed without <br /> headspace The samples will then be labeled with the boring <br /> location, depth sampled, project name, initials of the person <br /> collecting the samples and the date and time of the groundwater <br /> sampling The samples will be chilled on ice for transport to the <br /> laboratory under chain of custody <br /> 6 ) Analyze each groundwater sample described in task 5 at a state <br /> certified analytical laboratory for TPH-G, BTEX, seven oxygenates <br /> (including ethanol and methanol) and HVOCs by EPA Method 8 260 <br /> In addition, if TPH-D is detected in any off-site groundwater sample <br /> during the recent groundwater sampling (data not available at the <br /> Frank's One Stop Workplan — September 2000 <br /> -9- <br />