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Lteuine fricke•Recon ENGINEERS,HYDROGEOLOGISTS 8 Mp IED SQENTISTS October 5, 1998 4111-12-002 Mr. Henry Kawai 235 Sandringham North Moraga, California 94556 Subject: Request for Access to Install and Sample a Cone Penetrometer Test boring and Two Groundwater Monitoring Wells at the Property Located at 526 Benjamin Holt Drive, Stockton, California Dear Mr. Kawai: On behalf of the Settling Dry Cleaning Defendants (SDCDs), Levine-Fricke•Recon (LFR) respectfully requests access to install and sample a Cone Penetrometer Test (CPT) boring and two groundwater monitoring wells at the property located at 526 Benjamin Holt Drive, Stockton, California. As you know, the SDCDs are investigating certain hazardous substance contamination in groundwater and soils associated with historical dry cleaning operations at the nearby Lincoln Center. This work is being performed pursuant to several orders of the United States District Court, Eastern District of California, in the case Lincoln Properties Ltd,, TT Norman Higgins. et al., Case No. CV-S-91-760-DFL-GGH. The work is being performed under the oversight of Lincoln Properties, Ltd. (LPL), the owner and manager of portions of Lincoln Center, as well as the California Regional Water Quality Control Board, Central Valley Region and the San Joaquin County Public Health Services, Environmental Health Division(SJC PHS/EHD). We have enclosed Lincoln Center Fact Sheets 1; 2, and 3, which describe the background and ongoing investigation at the Lincoln Center site. The environmental investigation is being conducted as described in the "Work Plan for Environmental Investigation, Lincoln Center, Stockton, California," dated September 23, 1996, and revised August 21, 1998, which is available for review at the Margaret Troke Branch of the Stockton Public Library, located at 502 Benjamin Holt Drive, Stockton, California. As part of the environmental investigation at the Lincoln Center site, the SDCDs will be monitoring and sampling groundwater at several proposed off-site locations (see enclosed Figure). The purpose of these off-site locations is to evaluate the lateral extent of any contamination that may be present in the groundwater migrating from the Lincoln Center site. The SDCDs are requesting access to install one CPT boring, one A-zone groundwater monitoring well, and one B- zone groundwater monitoring well on a portion of the parking lot near Benjamin Holt Drive. The CPT boring will be used to identify the type of soil encountered before designing and installing the groundwater monitoring wells. It is anticipated that the A-zone groundwater monitoring well will extend to a depth of approximately 85 feet below ground surface (bgs) and the B-zone groundwater monitoring well will extend to a depth of approximately 130 feet bgs. The groundwater monitoring wells will be used to measure the depth of groundwater and to collect groundwater samples for subsequent laboratory analysis. 1900 Powell street, 12th Floor, Emeryville, California 94608-1827 • (510) 652-4500 • fax (510) 652-2246 Offices Worldwide