SITE INFORMATION AND CORRESPONDENCE_1998-2000

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L7 Levine•Fricke•Recon ENGINEERS,HVDRpGEOLOGISTS 8 APPLIED SCIENTISTS February 27, 1998 ; 2 4111.90-001 via U.S. mail TO: PARTIES ON THE ATTACHED DISTRIBUTION LIST Subject: Bimonthly Letter Report for December 1, 1997 through January 31, 1998, Lincoln Center, Stockton, California Dear Interested Parties: On behalf of the Settling Dry Cleaning Defendants (SDCDs), Levine-Fricke•Recon Inc. (LFR) presents this letter report summarizing activities for the period December 1, 1997 through January 31, 1998 ("the bimonthly period") at Lincoln Center, located in Stockton, California ("the Site," as defined in the "First Final Consent Decree Order, Judgment and Reference To Special Master," filed with the Court on January 19, 1996). The information in this letter report is provided pursuant to Sections IV(A)(1)(f) and IV(F) of the "Permanent Injunction Governing Investigation, Monitoring, and Testing of the Hazardous Substance Contamination at and Emanating from Lincoln Center and Order of Reference to Special Master," issued by Judge Levi of the United States District Court, Eastern District of California, and filed on August 16, 1993. Ongoing Data Collection and Field Activities The data collection and field activities listed below were conducted at the Site during the bimonthly period. The scope of work for these activities was previously discussed with Lincoln Properties, Ltd.; the Regional Water Quality Control Board, Central Valley Region; and the Department of Toxic Substances Control, where applicable. Fluid levels were measured in site monitoring wells December 15, 1997. A summary of groundwater elevation data for that month was presented in the fourth quarter 1997 groundwater monitoring report, submitted to all parties on February 13, 1998. In accordance with the RWQCB's recommendation provided in its November 18, 1997 letter to Robert Thompson, Esq., fluid levels will no longer be measured in site monitoring wells on a monthly basis. Fluid-levels will now be measured on a quarterly basis and results will continue to be presented the quarterly monitoring reports. • Shallow and deep soil-vapor samples were collected from borings located adjacent to a sanitary sewer line on Gettysburg Place on December 5, 1997. • Air, soil-vapor, and soil boring samples were collected from inside the vacant former Hollywood Video store from January 12 through 24, 1998. The results of these samples will be evaluated as part of the human Health Risk Assessment to be performed at the completion of the remedial investigation activities. 1900 Powell Street, 12th Floor, Emeryville, California 94608.1827 • (510) 652.4500 • fax(510) 652-2246 • Offices worldwide