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emission control devices such as vapor-phase granulated activated carbon (GAC) or direct <br /> discharge will be implemented with approval of the San Joaquin County Environmental <br /> Health Services (SJCEHS) and San Joaquin Valley Unified Air Pollution Control District <br /> (SJVUAPCD) <br /> 3 2.3 Treatment Compound and Pivin <br /> A six foot high, chain-linked fence with slats and barb wire (20 feet by 15 feet) will be <br /> placed around the thermox and blower. Construction of the treatment equipment compound <br /> will meet applicable local building codes and fire department regulations. The remediation <br /> compound location is shown on Figure 2. <br /> Underground piping from the nested vapor extraction wells VEW-1A through VEW-4B will <br /> be manifolded in the compound before the blower. A "T" fitting will be placed at the top <br /> of each well and locking well cap inserted All piping, tees, joints, valves and other soil <br /> vapor extraction components will consist of 2-inch diameter schedule 80 PVC. Gate valves <br /> will be installed just before the manifold to allow independent regulation of the air flow <br /> from individual wells and sampling ports will be installed just before the manifold to allow <br /> independent sampling of the vapor streams from each of the extraction wells A <br /> . magnahelic gauge and a pitot tube will also be installed on each soil vapor extraction line <br /> prior to the manifold to allow independent measurement of the flow rate from each of the <br /> extraction wells. <br /> • 3 2.4 Permitting <br /> The proposed treatment system will reduce the observed influent concentrations to effluent <br /> levels acceptable to the SJVUAPCD. An application for an authority to construct (ATC) <br /> permit for the complete air emission control program for the site will be prepared and <br /> submitted to the SJVUAPCD. After an ATC is obtained and the system installed, a source <br /> test will be conducted to verify system performance. A permit-to-operate (PTO) will be <br /> obtained at the successful completion of the source test and compliance demonstration <br /> period. The PTO will establish monitoring parameters and emission discharge limits that <br /> are derived using risk-based parameters <br /> 4.0 PROJECT SCHEDULE <br /> Upon approval of the soil remediation work plan and receipt of an SJVUAPCD ATC, the <br /> vapor extraction system installation will commence and will take approximately 2 weeks <br /> to complete. Start-up of the vapor extraction system is projected to commence in <br /> • September 1993 The vapor extraction system is anticipated to operate for approximately <br /> one year. <br /> TEXSTOCK SRW SEACOR <br /> N0003-.006-01 5 <br />