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' Operation of the extractions stem will further decrease emissions from the site over time As the <br /> Y o <br />' hydrocarbon concentration of the process stream decreases over time, alternative emission control <br /> devices such as vapor-phase granulated activated carbon (GAC) or direct discharge will be <br />' implemented with approval of the SJAPCD <br /> 3 5 Treatment Compound and Piping. <br /> A six foot high,chain.-linked fence with slats and barb wire (20 feet by 16 feet)will be placed around <br />' the IC engine and vapor extraction piping manifold Approximate location of the remediation <br /> compound, proposed underground piping and related site features is shown on Figure 8 <br />' Construction of the treatment equipment compound will meet applicable local building codes and <br /> fire department regulations <br /> 1 <br />' Above ground piping from vapor extraction wells W-1, W-2, and W-4 will be manifolded before the <br /> IC engine A "T" fitting will be placed at the top of each well and locking well cap inserted All <br /> piping, tees,points, valves and other soil vapor extraction components will consist of 2- or 4-inch <br /> diameter schedule 40 PVC Gate valves will be installed dust before the manifold to allow <br />' independent regulation of the air flow from individual wells Sampling ports will be installed dust <br /> before the manifold to allow independent sampling of the vapor streams from each of the extraction <br />' wells and vapor extraction trench piping A magnahelic gauge and a pitot tube will also be installed <br /> on each soil vapor extraction line prior to the manifold to allow independent measurement of the <br /> flow rate from each of the extraction wells <br /> 3 6 Perniittina <br /> The proposed treatment system will reduce the observed influent concentrations to effluent levels <br /> acceptable to the SJAPCD An application for an authority to construct (ATC) permit for the <br /> complete air emission control program for the site will be prepared and submitted to the SJAPCD <br /> IAfter an ATC is obtained and the system installed, a source test will be conducted to verify system <br /> performance A permit-to-operate(PTO) will be obtained at the successful completion of the source <br /> TOCI<ia}Ztp <br /> N90054)02i 1 AuSE ACORN <br /> gw12G 1999 <br />