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Mr. Jim Barton <br /> RWQCB <br /> March 29, 2013 <br /> Page 14 <br /> Soil samples will be collected by cutting an approximately 6-inch section of the acetate <br /> liner and capping each end with Teflon tape and plastic end caps. Samples may also be <br /> collected in glass jars and sealed with Teflon tape and tight fitting caps. Each sample <br /> container will be appropriately labeled with the sample name, depth, date, time, and <br /> sampler's initials. Each sample will also be sealed in a re-sealable plastic bag and placed <br /> in a insolated cooler with ice for transport to the analytical laboratory. Sample <br /> information will then be recorded on the COC. <br /> PID readings and visual observations will be used to select one or more soil samples from <br /> each boring. The remaining samples will be placed on hold at the analytical laboratory. <br /> Groundwater Sampling <br /> When groundwater is encountered, the boring will be extended,approximately five feet <br /> and a grab sample will be collected using hydropunch or similar technology. Samples <br /> will be transferred into laboratory-prepared sample bottles, labeled, recorded on the COC <br /> and placed in a chilled cooler to preserve the samples until analysis by the laboratory. <br /> Decontamination Procedures <br /> Drill rods and reusable sampling equipment will be properly decontaminated, initially <br /> and after each use, to ensure sample quality and eliminate potential cross-contamination <br /> between locations. Drilling and re-useable sampling equipment will undergo a three-stage <br /> procedure involving a non-phosphate detergent wash, potable.water rinse, and deionized. <br /> water rinse. <br /> Field Quality Control Samples <br /> Field quality control (QC) samples will be collected throughout the duration of the field <br /> effort described in this workplan. Duplicate samples (field duplicates) are used to <br /> determine the precision associated with field and analytical procedures. Field QC samples <br /> have been assigned by the project manager, but may be moved at the discretion of the <br /> sampler. QC samples will be collected in the field and submitted to the laboratory with <br /> normal samples in accordance with the frequencies described below: <br /> • Field duplicate samples at approximately 5 percent of the total number of normal <br /> soil vapor and groundwater samples collected. <br /> Proposed duplicate sample locations are shown on Table 1. <br /> Sampling Handling and Documentation <br /> Soil and groundwater sample containers will be sealed, labeled, and placed in a cooler <br /> chilled to 4 degrees Centigrade for delivery to the appropriate analytical laboratory with a <br /> separate signed custody record enclosed in each sample cooler. Soil vapor samples,les <br /> , <br /> which are collected in self-contained canisters, will be labeled and submitted to the <br /> appropriate analytical laboratory with a signed custody record enclosed. <br />