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k' ■ KLEINFELDER Pushprobes will be advanced using a pneumatically driven steel probe. Soil samples will be obtained by inserting a sample barrel, lined with acetate liners, into the probe. The sample barrel will be lowered to the desired sampling depth and driven into the soil. The sample tubes will be removed and sealed with Teflon and plastic fitting end caps. Soil samples will lie collected continuously during the advancement of the pushprobes to the proposed maximum depths ranging from of 11 to 15 feet bgs. During the advancement of the borings, soil samples will be collected for lithologic classification based on the Unified Soil Classification System (USCS). As part of this scope of work, qualitative field screening, with an organic vapor analyzer (OVA) will be used. The OVA measures ionizable compounds in air in parts per million by volume (ppmv). At this time, we propose to collect a total of 36 soil samples, two from each soil probe location. The soil samples will be collected at approximately depths ranging from surface to 9 feet bgs and at varying intervals. The six groundwater samples will be collected using a disposable or stainless steel bailer or by positive displacement through polypropylene tubing attached to a stainless steel ball valve. If turbid groundwater conditions are encountered, which is common at the Port of Stockton, a disposable screened PVC casing may be placed within the pushprobe holes to filter out sediment, as necessary when using the tubing/ball valve methodology. The PVC casing will include a 5 to 10 foot .010-0.020-inch slot screened interval, placed within the water bearing zone, prior to groundwater collection using the tubing and check valve. The groundwater will be decanted into laboratory supplied bottles directly from the tubing or using pre-cleaned stainless steel bailers. After collection, the soil and groundwater samples will be labeled, logged on a chain-of-custody form, and immediately stored in an iced cooler. The samples will be transported under chain-of- custody control to Kleinfelder's office and then transported by courier in a sealed container to a State Certified Laboratory to perform the requested analyses. Approximately 36 soil samples (estimate two from each of eighteen soil borings) and six groundwater samples will be submitted for the following analyses. • Nitrate as N by EPA Method 300.0 • Total Kjeldahl Nitrogen (TKN) by EPA Methods • Ammonia by EPA Method 350.3. The samples will be analyzed on a standard 10-day working turn-around time (TAT). Expedited TATs can be provided at additional costs. Task 3 Reporting Upon completion of the field activities and receipt of the analytical results, a report of findings for the advancement of the push probes sampling will be prepared for client and agency review. The report will include: • A description of the field activities, observations, and protocols 02001 PROP.ENV/ST04P 165/DGD:ss Page 2 of 6 Copyright 2004,Kleinfelder, Inc. April 19,2004