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E. F. Mitchler Property Page 2 <br /> Proposal 162.2- Phase IIA Investigation <br /> Phillips (Harrison) <br /> February 6, 1998 <br /> In order to further assess the possibility the oil water separator system may have <br /> leaked to impact the soil, soil samples will be collected from beneath the separator <br /> chambers and the steam cleaning drain area. <br /> PROPOSED SCOPE OF WORK <br /> Based upon the recommendations of the Phase I ESA referenced above, as well as <br /> on a discussion with you, we propose the following Scope of Work: <br /> 1. Prepare a brief Work Plan for submission to the San Joaquin County Public <br /> Health Service - Environmental Health Division (PHS/EHD) and obtain the <br /> required San Joaquin County Permit to install soil borings. <br /> 2. Using a concrete core cutter, cut four, 8 inch diameter holes in the concrete <br /> pavement. The holes will be placed in positions near the three chambers of the <br /> oil water separator and the drain in the steam cleaning area. <br /> 3. Using hand auger soil boring equipment, advance 3 soil borings at an angle such <br /> that at an anticipated total depth of 10 to 12 feet, the borings will be beneath the <br /> chambers of the separator. Using the same equipment, advance a vertical soil <br /> boring to a total depth of 10 feet at a position near the drain in the steam <br /> cleaning area. Soil samples will be collected for geological and possible <br /> analytical evaluation at five foot intervals using a 2.0 inch diameter (i.d.) <br /> hammer driven drive sampler. All soil sampling equipment will be <br /> decontaminated between uses by washing using a three bucket wash system and <br /> lab grade detergent. All soil samples will be sealed with aluminum foil, capped, <br /> labeled and placed in a cooler at 4° Celsius for transport to the laboratory <br /> following Chain of Custody protocol. Chain of Custody (CofQ forms are <br /> documents used to track the handling of samples All dates, times, persons and <br /> companies handling the samples were listed from the time the sample was <br /> collected to its ultimate disposal. <br /> 4. The geology will be logged by a professional geologist under the supervision of a <br /> registered geologist. Soil samples will be collected on five foot intervals for <br /> geological and possible analytical evaluation. One sample from each boring (it is <br /> anticipated it will be the bottom hole sample) will be submitted for analysis. If <br /> field techniques do not suggest the presence of soil staining or abnormal <br /> petroleum odors, the three samples from beneath the oil water separator will be <br /> composited for laboratory analysis. The samples from the vicinity of the <br /> separator and the steam cleaning drain will be analyzed for Total Extractable <br /> Petroleum Hydrocarbons (TEPH) by EPA method 8015(m)/3540, and for <br /> 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. (209) 569.0293 <br /> Modesto, CA 95356 Fax(209)569.0295 <br />