ARCHIVED REPORTS XR0001782 - Laserfiche WebLink

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Revised LFR Levine•fncke within relatively permeable materials Furthermore, the relatively high concentrations of PCE detected in groundwater at City of Lodi groundwater rnonrtormg well MW-09 (located at 212 West Pine Street), and at areas lateral to MW-09, appear to be a direct result of the significant concentrations of PCE emanating from soil vapor at the - y 212 West Pine Street property. The data to be collected duruig the investigative pilot f test activities proposed with this Work Plan will assist LFR in further assessing the SCM ' Pilot Testing Data Quality Objectives (DQO) In defining the DQOs for the Pilot test various factors were considered, including Potential uses for the data, the schedule of the project, overall levels of concern using health-risk-assessment-based Ontena for the project, and cost linutations. The DQOs for the pilot testing activities are to- • collect the data necessary to assess the effectiveness of each tested technology (SVE, air sparging, and ozone sparging) in removing VQCs from either soil vapor or groundwater, and • assess the possible range of SVE rates, the extracted soil vapor concentrations, air spargrng Pressures, and ozone sparging pressures adequate to size blowers, wells, and treatment components for the assessment of a full scale system for SVE, air sparging, and/or ozone sparging if necessary 1.2 Summary of Background information r- = The Guild Cleaners property is generally rectangular in shape (oriented north to south) The Property Vrcrnrty Map rs included as Figure 1 A property plan is shown in Figure 2 Potential VOC sources within the area bounded by Pine Street to the north, Lee Avenue to the west, School Street to the east, and Lodi Avenue to the south ("Area Of Investigation-) are shown in Figure 2. In 1989, the City identified the presence of PCE, a chlorinated solvent, rn water samples obtained from a then newly constructed city water supply tank Subsequently, this led various agencies to test city water supply wells for chlorinated solvents A few ' of these wells were reported with concentrations of PCE and/or tnchloroethylene (TCE) above the Calzfonua Maxirrntm Contaminant Levels for these compounds, The Property has been idennfied by DTSC and the City as allegedly having contributed to the presence of aertarn chlorinated solvents within the Area of Investigation as a result of former operations on the Property. 1.3 Work Plan Organization Thus Work Plan is organized to present the scope of work for the SVE/GS Sections 1 and 2 present the current understanding of site conditions based on the data as of WP-sv]9135-LMIF -0a123 doe ar Obi�0 d e2T0V9b60ZT 01 906b 299 OTS 3ADIH3 3NIA31 NAS a3 92 9T 20, 60 inr