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EIM® <br /> 1 <br /> Mr. James Barton <br /> 1 March 31, 2005 <br /> Page 4 <br /> 1 documentation for chemical analysis. Development and decon rinsate water will be stored on <br /> site in appropriately labeled 55-gallon DOT drums and will be disposed of at a State of <br /> California and Unocal approved facility. <br /> 1 Well Development and Groundwater Sampling <br /> 1 The newly installed air sparge well will be developed a minimum of 72 hours after installation. <br /> This will allow the neat cement grout seal time to cure. The well will be developed using a surge <br /> 1 block and submersible pump. Groundwater samples will be collected following development. <br /> Groundwater samples will be submitted to a state-certified laboratory under chain-of-custody <br /> protocol for analysis of TPHg using EPA Method 8015M, and BTEX, MTBE, 1,2 DCA, and EDB <br /> 1 by EPA Method 8260B. <br /> 1 Well Surveying <br /> A state-certified surveyor will survey the newly installed well. Survey data will include: northing, <br /> 1 easting, well-box elevation, well casing elevation, latitude, and longitude. Horizontal <br /> coordinates by the global positioning system (GPS) will also be obtained by the surveyor. <br /> 1 Remediation System Monitoring <br /> To correspond with the restart of the SVE system and the continuous operation of the AS <br /> 1 system, ENSR will perform quarterly site visits to monitor the extraction wells for vacuum, flow <br /> rate, and concentration of petroleum hydrocarbons measured with a PID. Additionally, ENSR <br /> will monitor the individual sparge wells on a quarterly basis for pressure and flow rate. <br /> 1 Permitting and Scheduling <br /> 1 Upon approval of this work plan, ENSR will submit permit applications for the installation of the <br /> proposed well, encroachment into city right-of-way, and will provide appropriate permit fees to <br /> 1 the appropriate agencies. On behalf of Unocal, ENSR will also obtain right-of-entry agreements <br /> with the appropriate property owners as required. Following approval of well permits, <br /> encroachment permits and obtaining necessary right-of-entry agreements, the proposed scope <br /> 1 of work will be implemented. <br /> 1 <br /> 1 J:\Projects\06940\5098-293\Working\Reports\5098 Work Plan 2AS wells.doc <br /> 1 Celebratino 35 Years of Excellence in Environmental Services <br />