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y <br /> 3164 Gold Camp Drive <br /> Delta Suite 200 <br /> IM& <br /> Rancho <br /> Cordova,CA 95670 <br /> Environmental 916/638-2085 <br /> Consultants,Inc. FAX:916/638-8385 <br /> April 29, 1997 <br /> Ms.Margaret Lagorio <br /> Public Health Services <br /> San Joaquin County <br /> Environmental Health Division <br /> 304 East Weber Avenue,3rd Floor <br /> Stockton,California 95201-0388 <br /> Subject: Soil Boring Investigation Work Plan <br /> Cargill Molasses Liquid Production Division <br /> 2130 West Washington Avenue <br /> Stockton,California <br /> Delta Project No.A097-035 <br /> Dear Ms.Lagorio: <br /> Delta Environmental Consultants, Inc. (Delta), has been authorized by Westway Terminal Company <br /> (WTC) to conduct phase II subsurface investigative work at the subject site for the purpose of a <br /> real-estate property transfer. This document presents a work plan for the subsurface investigative work. <br /> All field work will be conducted according to methods as described in Enclosure A. <br /> Delta proposes to complete the following scope of work: <br /> • Using a geoprobe, complete five soil probes at five sampling locations (SP-1 through SP-5) <br /> as shown on Figure 1. Assuming the depth to ground water to be less than 15 feet below <br /> surface grade (bsg), soil samples will be collected from the ground surface to the uppermost <br /> water-bearing unit. One of the soil probes will be sampled continuously. The remaining soil <br /> probes will be sampled at 5-foot intervals. The soil samples will be visually inspected and <br /> classified according to soil type using ASTM 2484-88, and will be screened in the field for <br /> total volatile organic compounds using a photoionization detector (PID). If PID or visual <br /> observations indicate that additional work is warranted, up to four additional soil probes will <br /> be installed to assess the real extent of impacted soil. Where ground water depths are too <br /> shallow to collect a representative soil sample, ground water samples will be collected and <br /> analyzed(see below) in place of subsurface soil samples. If PID readings are detected above <br /> background levels or if visual evidence of soil staining is observed, a sample of subsurface <br /> soil will be collected from that sampling location and transported to a California-certified <br /> laboratory, with the chain-of-custody forms. Select soil samples will be analyzed for volatile <br /> organic compounds (VOCs) by EPA Method 8240 and total petroleum hydrocarbons (TPH) <br /> as gasoline and diesel by EPA Method 8015 Modified. <br /> Providing a Competitive Edge `i\ <br />