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SECTION II. <br /> SCOPE OF WORK AND LIMITATIONS <br /> A. PURPOSE <br /> The purpose of this limited subsurface screening investigation is to evaluate whether the <br /> subsurface in limited areas at the subject property has been impacted by chemical compounds <br /> associated with the reported former activities as identified in prior reports. Since this is a <br /> screening assessment—where the scope of work is targeted to the potential impacts from the <br /> current and (possible) former clarifiers, underground storage tanks (USTs), above-ground <br /> storage tanks (ASTs) — soil, soil vapor, and groundwater sampling were proposed. Based on <br /> information from nearby sites, the estimated depth to groundwater was assumed to be <br /> approximately 30 feet bgs. <br /> This screening investigation is not intended to define the extent of potentially impacted soil, <br /> soil vapor, or groundwater at the subject property, but rather is intended to discover area(s) of <br /> impact by volatile organic compounds (VOC) and semi volatile organic compounds (SVOC <br /> constituents), pesticides (including herbicides), petroleum products and heavy metals in limited, <br /> accessible locations at the subject property. <br /> B. SCOPE OF WORK <br /> Based on information available to PEI, the following scope of work was proposed on January <br /> 23, 2012: <br /> 1) Site Safety Activities - Preparation of Health and Safety Plan and Notification of <br /> Underground Service Alert (USA). <br /> 2) Workplan preparation and submittal/interface with agency- Prepare a workplan for <br /> submittal to the San Joaquin County Environmental Health Department (SJCEHD) <br /> for collection of soil vapor, soil and groundwater samples. <br /> 3) Screening_geophysical survey - PEI will retain the services of geophysical <br /> contractor in an attempt to locate subsurface utilities and evaluate selected exterior <br /> areas for proposed boring locations. This portion of the scope will assist in <br /> evaluating the selection of boring locations and is an integral part of the evaluation <br /> efforts. Assume 3 field days. <br /> 4) Screeningsoil oil vapor survey–Advancement of up to 20 shallow borings both inside <br /> and outside the main subject building and/or near anomalies identified from the <br /> geophysical survey. This assumes two full field days. Soil vapor samples will be <br /> obtained at 5 feet below ground surface (bgs) in all borings (approximately 24 total <br /> samples, with an expected 4 samples for QA/QC and 20 for screening analysis) and <br /> resultant soil vapor samples will be analyzed by an on-site analytical CA-certified <br /> laboratory for VOCs via EPA Method 8260. Assume 2 field days. <br /> Limited Phase II Environmental Site Assessment Report Pinnacle Environmental,Inc. <br /> 248 Industrial Avenue,Stockton,CA 95206 Page 3 <br />