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ATTACHMENT B <br /> SOIL VENT SYSTEM OPERATION DATA <br /> System Monitoring (January 1994 - July 1995) <br /> TPHg Extraction Rates by Soil Venting System (Graph) <br /> Cumulative TPHg Extraction Estimate by Soil Venting System (Graph) <br /> BTEX and TPH Concentrations Extracted by Soil Venting System (Graph) <br /> Soil Vapor Analytical Results <br /> Example TPH Extraction Calculation <br /> Vapor Sampling "Tedlar" Bag Sampling Technique <br /> Laboratory Reports and Chain of Custody Forms <br />