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Ogden Environmental Services, Inc. March 4, 1980 Mr. William s. Rickman Page :3 In addition to the deeper borings within the processing plant, a number of shallower borings will be completed with a JMC stainless steel hand auger. Prior to advancing these borings, the concrete foundation will be saw cut and removed. Undisturbed soil samples will be collected with a stainless steel drive sampler. The hand auger method should provide representative soil samples above the water saturated sand layers. 'these layers were encountered at depths of about 15 to 25 feet in previous borings at the site (see Klein- felder report, April 1987) . Caving within the borehole may prevent advancino the hand auger to depths exceeding 25 feet below ground surface. Should additional sampling be required to determine the vertical extent of contamination within the boiler house and processing plant, a skid-mounted drilling rig designed for use in areas with limited access could be posi- tioned within the respective buildings. Laboratory Analysis. Soil samples collected for chemical analysis will be recovered in stainless steel or brass liners. These samples will be capped, labeled, and stored at about 4°C. All samples will be field screened for volatile organics using a photoionization detector (PID) . Those samples that show positive readings of organic gases will be analyzed for total petroleum hydrocarbons (TPN) . These samples will be transported under chain-of-custody control, to a state-Certified chemical laboratory. The samples will be analyzed for TPH by EPA method 8015 (modified) . Other samples within the potentially contaminated zone will be retained (stored at 4°C) in the event that additional testing is required. Report and Recommendations The information collected will be presented in a narrative and graphic format to identify the extent of the petroleum contamination. If practical, the contamination plume will be mapped laterally and vertically, such that the higher concentrations of petroleum contaminants can be identified for remediation purposes. The report will provide options and alternatives for practical remediation purposes.