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„ <br />� steps for conducting a vapor extraction pilot test and an air sparging pilot test This task also <br /> includes notifying the San Joaquin Valley Unified Air Pollution Control District (APCD) of the <br /> Pilot testing, scheduling field personnel and equipment, and performing any other necessary field <br /> preparation and job startup activities <br /> Task 5: Vapor Extraction Pilot Test (3 welts) <br /> A one-day vapor e�ctraction pilot test (VET) will be conducted utilizing the three vapor wells to <br /> determine the feasibility of vapor extraction to remove contaminants in soil on-site The pilot test <br /> will consist of one long term VET and two short term VETs The long term test VET will be <br /> performed by applying a vacuum on the test well for approximately two to four hours or until <br /> subsurface conditions stabilize. During the test, field personnel will measure flow rates, applied <br /> vacuum on the test well, induced vacuum in observation wells, pressure, and temperature In <br /> addition, two influent and one effluent vapor sample will be collected for laboratory analysis of <br /> TPHg and BTEX Next, two short term VETS will be performed on the other wells but the tests <br /> will last less than one hour each. The same parameters will be monitored as in the long term test <br /> but only one influent and no effluent vapor samples will be collected from each well for laboratory <br /> analysis of TPHg and BTEX <br /> Task 6: Air Sparge Pilot Test (2 wells) <br /> Air sparge pilot tests will be conducted on the two new wells to determine the feasibility of air <br /> spargmg for remediating impacted groundwater on-site These tests will be conducted in <br /> conjunction with the vapor extraction pilot tests discussed in Task 5 <br /> Smith Environmental will collect vapor and groundwater samples from two monitonng wells to <br /> establish baseline concentrations To conduct the test, air and helium will be injected into one <br /> sparge well at a time for approximately 2 to 4 hours or until conditions stabilize while response is <br /> monitored in observation wells Helium is used as a tracer in the groundwater to aid in the <br /> determination of an effective radius of influence After the test is completed vapor and <br /> groundwater samples will be collected from monitoring wells to evaluate the reduction or increase <br /> in concentrations. A second phase of testing will be conducted on each well using the same <br /> procedures but vapor extraction will be introduced while air sparging is being conducted. <br /> Corrective Action Plan <br /> Task 7: Corrective Action Plan Preparation <br /> A Corrective Action Plan (CAP) will be prepared for submittal to PHS/EHD The report will <br /> summarize field pilot test results, the selected alternatives for soil and groundwater remediation, <br /> remediation system details and proposed schedule for implementation of site remediation. The <br /> report will be sent in draft form to the client prior to submittal to the regulatory agencies <br /> All work described in this proposal will be performed under the direction of a California <br />. Registered Professional Engineer - <br /> -` ►P9Q679x.ac <br /> • <br /> sWrH <br />