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CV-ATC <br /> �. <br /> A S S O C I A T E S I N C <br /> Short Term Vapor Extraction Test <br /> After the long term VET is completed, two short term VETS will be performed on the adjacent <br /> vapor wells, and the test will last one to two hours. These tests will be performed to collect <br /> additional data to assist in determining the effective radius of influence, and to determine the petroleum <br /> hydrocarbon concentrations extracted from this well. The same parameters will be monitored as in <br /> the long term VET. Two influent vapor samples will be collected from the vapor well for <br /> laboratory analysis of TPHg, BTEX, and fuel oxygenates. One vapor sample will be collected at <br /> the beginning of each test. Vapor samples will be analyzed for TPHg, BTEX, and fuel oxygenates by <br /> EPA method TO-14. <br /> Vapor Sample Collection <br /> Vapor samples will be collected through a 1/4-inch Teflon sample line connected to a stainless steel <br /> wellhead fitting, and will be collected in Tedlar sample bags. Teflon tubing will be used to minimize <br /> sample loss through adsorption and the possibility of distorted results from sample lines contaminated <br /> by previous test runs. <br /> Report Preparation <br /> Upon completion of the subsurface investigation activities, a summary report will be prepared for <br /> submittal to the EHD. The report will include a description of all field activities, laboratory <br /> analytical results, and boring logs. Additionally, the report will include updated lateral and <br /> vertical extents of hydrocarbons in soil and groundwater and the evaluation for the feasibility of <br /> vapor extraction by pilot testing. <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer. All work will be performed in accordance with ATC's Site <br /> Safety Plan (SSP) and Quality Control/Quality Assurance Plan on file with the EHD. <br /> Projected Schedule <br /> Once approval of this workplan has been received, ATC will schedule drilling activities. ATC will <br /> notify the EHD at least 48 hours prior to beginning any field activities. The summary report will <br /> be submitted to HHD approximately six weeks after the completion of field activities. <br /> w:\14885\workplans\wkpin2005.doc 6 <br />