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v'4 •4 _ � p <br /> and horizontal extent of soil contamination beneath the <br /> a former underground storage tank locations, and to determine <br /> " whether shallow <br /> ground water has been Impacted. This <br /> Workplan includes the drilling of approximately 3 to 6 soil <br /> borings, the installation of 4 monitoring wells, development, <br /> sampling and the calculation of groundwater gradient <br /> (Figure 2) , <br /> 3.0 SCOPE OF WORK <br /> The following scope of work has been developed to ' <br /> initiate the required soil and groundwater investigation: <br /> � aril' 3 to 6 soil borings...., g (number of borings is . <br /> dependent upon whether sub-surface contamination is <br /> encountered) ; <br /> i <br /> 2. Install four monitoring wells, placing one monitoring <br /> well near the center of the former tank locations, and <br /> three additional monitoring wells around the perimeter of <br /> the former tank locations; <br /> 3. Collect soil samples, each of them at five foot intervals <br /> during the drilling operation for lithvZogic determin- <br /> ation and laboratory analyses; <br /> 4• Have soil samples analyzed by a California Certified <br /> Laboratory for Total Petroleum Hydrocarbons <br /> (TPH-Gasoline) , Benzene, Toluene, Xylene, and Ethyl- <br /> benzene (BTXE) ; <br /> 5. Develop the monitoring wells and sample the ground <br /> _- -water--for-analysis-b a - -- - -- <br /> ^' y California Certified Laboratory. <br /> for Total Petroleum Hydrocarbons (TPH-Gasoline) , and <br /> ETS ENVIRONMENTAL & Assoe. <br /> ' " PROJECT NO. 305, PAGE 3 <br />