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• Ph 0.2 units <br /> • Temperature 0.5 degrees Celsius <br /> ,. Specific,conductivity - 10 percent <br /> The samples will be placed in an iced cooler and transported to a state-certified <br /> laboratory for analysis. Purged water-from sampling and.development; as well as <br /> decontamiriation rinsate, willbe stored onsite in Department of Transportation <br /> !. approved 55-gallon drums.for transport and disposal., <br /> To calculate the hydraulic gradient and groundwater flow direction of the shallow <br /> aquifer, each well will be surveyed by'astate-licensed surveyor from the top of the <br /> casing to within Ul foot accuracy in reference to an established benchmark or a <br /> comnmon.datum IJ <br /> Task 4: Analyze Soil and Groundwater Samples <br /> Soil and groundwater samples will be transported to a state-certified laboratory and <br /> - analyzed for total petroleum hydrocarbons as gasoline.(TPH-G) and benzene, <br /> toluene,ethylbenzene, and total xylenes (BTEX) using Environmental Protection <br /> Agency (EPA) Methods 5030/8015/8020. The samples will,be analyzed on.a <br /> standard 2-week turnaround tune., r- <br /> Task 5; Analyze Data and Laboratory Results <br /> On completion of sample analysis; a detailed evaluation of,results and available <br /> information will be conducted to assess the nature and extent of,petroleum <br /> hydrocarbons in.the soil and groundwater. This will include the following <br /> Interpretation of geologic and hydrogeologic characteristics of the water. <br /> bearing formation and the nature of subsurface contamination: <br /> • Preparation of groundwater potentiometric.surface maps, hydrocarbon <br /> concentration maps, and hydrogeologic cross sections. <br /> -, <br /> ' * Assessment of,the extent of hydrocarbons in"the soil and/or groundwater <br /> ` Task 6: Prepare Report <br /> A report presenting the results; findings, conclusions; and recommendations of the <br /> investigation will be submitted to the governing regulatory agencies. The report <br /> will include include,analytical results;sampling documentation,boring,logs; field <br /> notes, and sampling protocol <br /> �. <br /> ro - 1013601/042793 - r.=3' - > <br /> ALISTO ENGINEERING'GROUP :-' <br />