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Standard Procedure for Groundwater Sampling--Petroleum Hydrocarbons(continued) <br /> Page 2 of 2 <br /> Trip Blanks <br /> To assure the quality of the collected samples and to evaluate the potential for cross contamination <br /> during transport to the laboratory, a distilled-water trip blank accompanies the samples In the cooler <br /> The trip blank is analyzed for the presence of volatile organic compounds of concern For petroleum <br /> hydrocarbons, the trip blank is typically analyzed for TPHg, BTEX, and MtBE by EPA Method 8260 <br /> Containment and Disposal of Generated Water/LPH <br /> All wastewater, purge water and LPH (1f present) generated during the field activities are retained on- <br /> site in appropriate containers (i e DOT-approved drums or bulk tanks) for future disposal All <br /> wastewater is delivered under appropriate manifest to a facility certified and licensed to receive such <br /> waste streams <br /> Related Procedures <br /> • Standard Procedure for Equipment Decontamination <br /> 1 1ConocoPhilhps\Tosco Marketing1111931QMR13QMR04 Final doc <br />