SITE INFORMATION AND CORRESPONDENCE

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Page 2 At January 1997 0 MW continued from page I The following sections briefly describe the field work that comply with the Court's orders, Levine-Fricke, now will begin soon,the equipment that will be used, and the Levine-Fricke-Recon Inc. (LFR), the Site Project Man- notifications that will be provided to residents and busi- ager designated by the SDCDs, has prepared an RDFS nesses in the area prior to performing the field work. Work Plan to perform the investigation. PROPOSED INVESTIGATIONS The RI/FS and IRA Work Plans call for performing certain parking lots located adjacent to the Site to identify and field investigations on and off the Site as discussed below. characterize the extent to which dry cleaning contamina- Prospective work locations are shown in Figure 2 of this fact tion has migrated in groundwater away from the source sheet.Additional locations may be required,depending on the areas. The Plume Perimeter Investigation tasks include results of this planned work. Appropriate permits will be collection of lithologic data,installation of groundwater obtained, where required, before performing the field work. monitoring wells,collection of groundwater samples, and performance of aquifer tests. Detailed information on the Source Investigation proposed investigation is contained in Section 3.6 of the A Source Investigation will be conducted at selected loca- RDFS Work Plan. tions within parking lots at the Site to identify and character- ize suspected or known dry cleaning contamination release The equipment used for these portions of the investigations areas along selected portions of the sanitary sewer system and for the duration of field activities will be similar to that and around the former and current dry cleaning facilities. described for the Source Investigation. The Source Investigation tasks will be conducted sequentially and include collection of lithologic data, collection of soil IRA Activities vapor,soil and groundwater samples,and installation of The IRA Activities will be conducted at the Site in two additional groundwater monitoring wells.Detailed informa- phases.Phase I will include the installation of groundwater tion on the proposed investigation is contained in Section 3.5 extraction wells near the downgradient edge of Lincoln of the RDFS Work Plan. Center and piping to convey extracted groundwater to a centralized treatment unit to be installed at the Site. Various sizes and types of field equipment will be used for this investigation.The majority of the equipment will consist Before installing these facilities,additional investigation and. , of a cone penetration tqdlMPT) rig, which will be used testing activities,such as installation of additional ground- to push an instrumented pr89 to soil to obtain lithologic water monitoring wells,collection of lithologic data and data;soil drilling rigs,which will be used to drill holes in the groundwater samples using CPT equipment, and perfor- ground to obtain soil samples and install groundwater wells; a mance of aquifer pump tests, will be conducted at the soil-vapor sampling rig and mobile laboratory,which will be Site to facilitate design of the Phase I IRA.Field activities used to pound a probe into the ground,obtain a soil-vapor for the IRA are in addition to those planned for the Source sample,and analyze it for the presence of dry cleaning Investigation, although some data from the Source Investi- contamination;and a geophysical logging rig,which will be gation will be used in designing the IRAs at the Site.The used to obtain lithologic data from boring prior to well equipment used will be similar to that described for the construction. Such vehicles are typically no larger than a Source Investigation. double-axle truck. Concrete trucks, water trucks, a small e phase II will likely include installation of soil vapor extrac- forklift, and other ancillary equipment will also be used tion wells and a treatment system in areas identified during occasion.The duration field activities will vary from less the Source Investigation. Soil-vapor extraction wells will be than 1 hour to approximately ]0 days at any given location. installed in a manner similar to the groundwater monitoring wells.Detailed information on the proposed investigation is Plume Perimeter Investigation P P g A Plume Perimeter Investigation will be conducted at contained in Section 3.0 of the IRA Work Plan. selected locations in neighborhood streets and commercial SCHEDULE • • The Source Investigation and Plume Perimeter Investigation The notices will describe the location, type, and duration of will begin in late January 1997.The exact duration of these the anticipated activities. Some of the field work required at investigations will depend upon the results of the initial data the Lincoln Center shopping center will be performed collection proposed in the RDFS Work Plan, but they are during non-business hours (from approximately 10 p.m. to expected at a minimum to continue through the summer of 7 a.m.). Field work to be performed off the shopping 1997. The IRA activities are currently under way and will center will be primarily conducted during daylight hours also continue periodically throughout 1997. wherever possible. Traffic plans will be prepared for work in public rights-of-way to safely route vehicle and pedes- Notices will be provided to residents and businesses imme- trian traffic around the work areas. The SDCDs will diately adjacent to the areas where field work will be attempt to minimize noise and other potential impacts to performed before the scheduled field activity is conducted. residents and businesses.