SITE INFORMATION AND CORRESPONDENCE_1998-2000

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LNN1 Levine.Fricke-Recon ENGINEERS.HYDROGEOLOGISTS&APPLIED SCIENTISTS April 30, 1998 4111.90-001 via U.S. mail TO: PARTIES ON THE ATTACHED DISTRIBUTION LIST Subject: Bimonthly Letter Report for February 1, 1998 through March 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 February 1, 1998 through March 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 (RWQCB); and the Department of Toxic Substances Control (DTSC), where applicable. • Quarterly fluid levels were collected from site monitoring wells on February 22, 1998. Groundwater samples were collected from site monitoring wells and selected Chevron monitoring wells during the period of February 23 through 27, and on March 1, 1998. A summary of groundwater elevation data and analytical results of these samples will be presented in the first quarter 1998 groundwater monitoring report to be submitted to the RWQCB on May 15, 1998. • Cone penetrometer testing (CPT) and push-in polyvinyl chloride piezometer (PIPP) borings for the Plume Perimeter Investigation were advanced and groundwater samples collected at upgradient locations on West Benjamin Holt Drive (Locations 1 and 5) and downgradient locations on Inglewood Avenue (Location 9) and Emeryn Street (Location 11). This work was conducted from March 16 through 20, 1998 (see Figure 1 for locations). • Additional air samples were collected from inside the vacant former Hollywood Video space at Lincoln Center on February 28, 1998. The results of these samples will be used to evaluate 1900 Powell Street, 12th Floor, Emeryville, California 94608-1827 • (510) 652-4500 • fax (510) 652-2246 Offices Worldwide