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GENESIS ENGINEERING&REDEVELOPMENT <br /> The analytical procedures, sample volumes, sample preservation, and holding times are <br /> presented in the Sampling and Analysis Plan. <br /> 2.2 Task 2—Drilling Mud Investigation <br /> To further evaluate the mobility of the diesel hydrocarbons detected in the drilling mud, <br /> the length of the hydrocarbon chains will be evaluated to assess mobility characteristics. <br /> These data will be further evaluated in combination with the analytical data collected <br /> from the analyses of the native soils,to further evaluate the mobility of the diesel range <br /> hydrocarbons. <br /> The same 24 borings used to collect the native soil samples will be used to collect the <br /> drilling mud samples (Figure 4). The borings will be advanced using direct-push <br /> technology in accordance with the procedures in the Sampling and Analysis Plan <br /> (Appendix A). One composite drilling mud sample will be collected from each boring. <br /> The sample will be collected as a four-foot section of core taken from the approximate <br /> center of the distance between the top and bottom of the drilling mud. The drilling mud <br /> sample will be collected in accordance with the procedures in the Sampling and Analysis <br /> Plan. <br /> The drilling mud samples will be analyzed for the following constituents: <br /> 1. Volatile Organic Compounds ("VOC"); <br /> 2. Semi-Volatile Organic Compounds("SVOC"); <br /> 3. Total Petroleum Hydrocarbons as gasoline("TPHg"); <br /> 4. Total Petroleum Hydrocarbons as diesel ("TPHd"); <br /> 5. Benzene, Toluene, Ethylbenzene, and Xylene (`BTEX"); <br /> 6. Polycyclic Aromatic Hydrocarbons("PAH"); <br /> 7. Oil and Grease; and <br /> 8. Alkalinity, Calcium, Chloride,pH, Sodium,Potassium, Sulfate, and Sulfide. <br /> The drilling mud samples will also be analyzed to determine if the extractable <br /> concentrations of the Title 22 Metals and Hexavalent chromium are below the MCLS or <br /> other applicable water quality standards. Drilling mud samples will be subjected to both <br /> deionized water and citric acid extraction. <br /> Site Investigation Work Plan 11 of 18 <br /> DePaoli Property <br /> November 14,2007 <br />