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ATTACHMENT B <br /> SOIL VENT SYSTEM OPERATION DATA <br /> JANUARY 1994 - MARCH 1995 <br /> SOIL VENT SYSTEM <br /> System Operation Data Spreadsheet <br /> Cumulative TPHg Extraction Estimate (Graph) <br /> BTEX and TPH Concentration Trends from Soil (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 />