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Discharging groundwater from the 24-hour pumping test to the storm sewer required permission from the City of Salem. Century West prepared and secured agreements on behalf of Marion County to discharge the groundwater to the storm water sewer. Discharge monitoring results were presented in an August 4, 1997 letter report from Century West to the Department of Environmental Quality (DEQ). Groundwater treatment prior to discharge was conducted by Century West. The treatment system consisted of two 17,000-gallon portable tanks in series with air sparging within each tank Periodic sampling and analysis of the groundwater were conducted and reported to the DEQ. (Appendix G: Site Photographs, photos 2-6.) 4.5 Regulatory Agencies 4.5.1 Red Discharge to Mill Creek City of Salem personnel met with Mike Staton, project manager for Staton Construction, regarding a red discharge observed in Mill Creek The City was concerned that wetting activities on the demolition project were causing a runoff problem. Mike Staton advised the City that Staton Construction was using a fine mist to keep dust under control during demolition, however, no water was leaving the site through the City storm water system. No further contact occurred regarding discharges to the City storm water system. 4.5.2 Sewer Capping Staton Construction did not cap sewer laterals from the main sewer pipe (running north to south down the center of the block) as required in the Project Specifications. Staton Construction did not abandon the laterals because they anticipated that abandonment and rerouting of the sewer main would occur during construction, which had been scheduled to immediately follow demolition. During the environmental remediation phase of the project, it became apparent that the sewer laterals were still open. The construction phase of this project was suspended and the sewer main will remain active for the near future. Once a construction schedule is identified, permanent abandonment of the sewer main will be addressed by the construction contractor. Century West personnel met with David Hartwig of Marion County, Mike Staton Construction of Staton Construction, and R. Scott Graves and Tim Daley of the City of Salem, Public Works Department, on December 19, 1997. In that meeting it was decided and agreed that Century West would subcontract Gelco Services, Inc. to seal the seventeen open laterals by sewer ~routing. Staton Construction agreed to pay the costs associated with abandonment of five of the seventeen laterals that were identified as active during demolition. Marion County accepted responsibility for the remaining twelve lateral abandonment costs. Demolition Management Page 5 C\k'EC 6/4/98 Courthouse Square Project 40806-001-22 Marion County