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Levine-Fricke-Recon <br /> ENGINEERS,HVDROGEOLOGISTS 8 APPLIED SCIENTISTS <br /> Field Activities <br /> 1. Cone Penetrometer Testing(CPT)and Push-In Polyvinyl Chloride (PIPP)Investigation <br /> The CPT/PIPP investigation is being conducted to evaluate the subsurface sediments and the <br /> distribution of certain hazardous substances potentially present in groundwater beneath Lincoln <br /> Center, including the Subject Property. This work will be conducted as part of the SDCDs' Phase I <br /> IRA and the source investigation at Lincoln Center. <br /> At least two CPT/PIPP boring locations are proposed in the parking lot on either side of the World <br /> Savings and Loan Association building. The proposed locations of these borings are presented on <br /> Figure 1. The CPT/PIPP borings will be advanced to approximately 75 to 80 feet below ground <br /> surface (bgs). Groundwater samples will be collected for subsequent laboratory analysis. <br /> Additional CPT/PIPP borings may be required depending on the results of initial field work. For <br /> example, if certain hazardous substances are detected in groundwater at the location south of World <br /> Savings and Loan Association building, additional borings may be required further south of this <br /> location. CPT/PIPP borings are also proposed along the sanitary sewer located near the former <br /> Finest Care Cleaners as part of the SDCDs' source investigation (Figure 1). <br /> 2. Soil-Vapor Investigation <br /> The soil-vapor investigation is being conducted to evaluate the distribution of certain hazardous <br /> substances potentially present in the soil beneath Lincoln Center, including the Subject Property. <br /> This work will be conducted as part of the SDCDs' source investigation at Lincoln Center. <br /> The proposed locations of the soil-vapor borings are presented in Figure 1. These borings will be <br /> advanced up to approximately 45 feet bgs. Soil-vapor samples will be collected for subsequent <br /> analysis by an on-site mobile laboratory. Additional soil-vapor borings may be required depending <br /> on the results of initial field work. For example, if concentrations of volatile organic compounds <br /> present in soil vapor exceed 100 micrograms per liter at an initially proposed location, additional <br /> soil-vapor boring locations will be required to complete the investigation. <br /> 3. Pilot Boring and Monitoring Well Installation <br /> As part of the environmental investigation at Lincoln Center, the SDCDs will be monitoring and <br /> sampling groundwater at several proposed locations. These locations are required for evaluation of <br /> the lateral extent of certain hazardous substances detected in groundwater, as described in the <br /> RI/FS Work Plan. The SDCDs propose to install two pilot soil borings and two groundwater <br /> monitoring wells at the locations shown in Figure 1. The pilot borings will be used to identify soil <br /> lithology before designing and installing the groundwater monitoring wells. The pilot borings will <br /> be advanced to approximately 140 feet bgs. Groundwater samples will be collected from one of the <br /> pilot borings for subsequent laboratory analysis. <br /> LC-ACCI7.LTR:JBA 2 <br />