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W A T F R E ea E RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: January 20, 2012 ITEM NO: 3 SUBJECT: HAZARDOUS MATERIALS SITE REMEDIATION CITY'S CORPORATION YARD - WORK ORDER NO. 1904774 ISSUE: Public Utilities Board approval is requested for Work Order No. 1104774. RECOMMENDATION: That the Board of Public Utilities approve an increase in the estimated capital expenditure for Work Order No 1104774 from $55,000 to$817,000 to remediate a Hazardous Materials Site located at the City's Corporation Yard located at 8095 Lincoln Avenue to make the site available for unrestricted use. BACKGROUND: In 1993, the Riverside Marketplace Redevelopment Project identified soil contaminated with creosote and high levels of lead at the former Mulberry Yard located near the intersection of Ninth Street and Vine Street. The Mulberry Yard was the City's Corporation Yard prior to its present location at 8095 Lincoln Avenue. The contaminated material was treated and transported to the City's Corporation Yard at 8095 Lincoln Avenue where it was placed in a lined pit and covered over in accordance with the"Final Closure Report, Placement of Chemically Stabilized Lead and Petroleum Hydrocarbon Impacted Materials',dated April 1994 by Science &Engineering Analysis Corporation (SEACOR),the consultant that performed the Remediation Work Plan for the Mulberry Yard. The disposal pitwas identified as a concern during a review of the Corporation Yard site for redevelopment or future uses. Public Utilities' Energy Delivery Division staff was tasked to prepare a plan to remediate the location for unrestricted use. On July 27, 2010, a Request for Proposals (RFP) to conduct a Hazardous Materials Site Investigation was issued to the Consultants' Panel for Various Public Utilities Capital Improvement Projects. A committee composed of Public Utilities and General Services Department staff reviewed the proposals and determined LOR Geotechnical Group, Inc., (LOR) of Riverside, California to be the best qualified consultant to perform the work. Staff entered into negotiations with LOR and developed a Scope of Services and not-to-exceed fee of$55,128 to complete the work. On October 1,2010,the Board of Public Utilities approved Work Order No. 1104774 for the estimated capital expenditure of$65,000. A Notice to Proceed was issued to LOR on November 1, 2010. LOR prepared and submitted a site Investigation Work Plan for review by the Regional Water Quality Control Board, District 8 (RWQCB8) on November 18, 2010. LOR conducted non-intrusive testing with ground penetrating radar on December 1, 2010. RWQCB8 approved the site Investigation Work Plan on December 7, 2010. LOR proceeded with push rig sampling on December 8,2010. Lab testing of the samples was performed and confirmed lead and hydrocarbon contamination as expected. LOR prepared and submitted a draft remediation work plan for review by the staff and the RWQCB8 on February 9, 2011. RWQCB8 approved the site Remediation Work Plan on March 7, 2011.