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L1 Levine-Fricke-Recon <br /> ENGINEERS,HYDROGEOLOGISTS 8 APPLIED SCIEN STS <br /> December 20, 1996 3966.05-003 <br /> G} <br /> r-M R <br /> Mr. Joel Weiss, Engineering Geologist c-) <br /> California Regional Water Quality Control Board, <br /> Central Valley Region _ <br /> 3443 Routier Road, Suite A = ' <br /> Sacramento, California 95827-3098 <br /> w � <br /> w <br /> Subject: Project Status Report and Revised Schedule, Interim Remedial Actions, Lincoln Center <br /> Project, Pacific Avenue and Benjamin Holt Drive, Stockton, California <br /> Dear Joel: <br /> Pursuant to our recent telephone discussions concerning the revised schedule for implementation of <br /> interim remedial actions (IRAs) at Lincoln Center (LC), Levine-Fricke-Recon Inc. (LFR), on <br /> behalf of the Settling Dry Cleaning Defendants (SDCDs), is presenting this project status report <br /> and proposed revised schedule to complete the remaining Phase I IRA tasks. <br /> Additional IRA Investigations <br /> As we discussed, the scope of work has been expanded to include additional subsurface <br /> investigation work (cone penetration testing [CPT] and in situ groundwater [PIPP] sampling) <br /> before completion of the Phase I aquifer testing task described in the "IRA Work Plan," dated <br /> September 3, 1996. This additional investigation field work is detailed below and is currently <br /> underway. When completed, the data from this field work will be incorporated into the final <br /> planning for the remaining Phase I IRA tasks (hydraulic testing and groundwater modeling). <br /> Installation of Proposed Aquifer Test Welland Resulting Data <br /> As you know, the SDCDs proposed to install a new monitoring well to be used to perform the <br /> Phase I IRA aquifer test to evaluate aquifer properties for IRA design. Well MW-100 was installed <br /> on October 30 and 31, 1996 at LC for this purpose (see Figure 1). <br /> As we discussed, the data generated during the installation of well MW-100 indicated that the <br /> character of the permeable, saturated intervals within the lower portion of the A-zone aquifer in <br /> this area were more complicated and variable than originally anticipated. Several transmissive sand <br /> lenses were encountered, which were not identified when well MW-11 was installed in 1990 (at a <br /> 1900 Powell Street, 12th Floor, Emeryville, California 94608-1827 • (510) 652-4500 • fax(510) 652-2246 • Offices Worldwide <br />