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VAPOR EXTRACTION SYSTEMA INSTALLATION <br /> Installation f Vapor COn ult and Manlf1dftSLthq V q�r Extraction Wel_IR <br /> Detailed inspection of the site revealed existing conduit lines that were previously used <br /> as part of a groundwater remediation system and had since been abandoned. More <br /> recent construction had broken the lines in some areas, but in order to minimize an <br /> impact to the site's daily business with construction (primarily blocking the Waudman St. <br /> access with new trenchwork), repairs and new connections were made to the existing <br /> lines at the broken spots. Based on the Vapor Survey results, groundwater monitoring <br /> ., wells MW-1, MW-3, MW-4, and RW-1 were selected for use as vapor extraction wells. <br /> - - MW-3, due to its' proximity, was manifolded to the old vapor extraction line with a <br /> balancing ball valve for variable flow control.The remaining wells, MW-1, MVV-4,and RW-1 <br /> were manifolded to the repaired underground conduit traveling along Waudman Avenue <br /> ! to the fenced compound in the southeast corner of the site next to the arcade. Please <br /> Imo; <br /> JA refer to f=igures 1 and 2 for details of the piping. The monitoring wells were manifolded <br /> i ; <br /> +— with 2" Schedule 40 PVC pipe and fittings which were installed underground in 12" deep <br /> trenches with a 6"crushed rock backfill followed by a hot asphalt patch. Monitoring ports <br /> were installed at each of the wells for sampling of the extracted hydrocarbon vapors. <br /> '- During installation, five well boxes, MW-1, MW-3, MW-4, VP-3, and VP-4 were replaced <br /> with EMCO Wheaton traffic rated well boxes per Southland's specifications. <br /> VAPOR EXTRACTION TECHNOLOGY, INC. <br />