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Ge0bglcaITech4&slxc. Page 4 <br /> ' Well Installation and Quarterly <br /> Groundwater Monitoring Report <br /> Project No. 1030.2 <br /> ' June 18,2002 <br /> watertight cap encased in a flush mounted traffic rated well box. The boring log (Appendix <br /> ' B) contains the details of construction. <br /> ' Soil cuttings and drilling decontamination water were placed in DOT-17 55-gallon drums <br /> and stored on site until their disposal can be arranged. <br /> ' 2.2 Soil Investigation <br /> 2.2.1 Soil Sampling Procedure <br /> Soil samples were collected and a boring log maintained on site by a GTI geologist. The <br /> samples were gathered in 6.0-inch brass liners using a 2.0-inch modified California split <br /> spoon sampler. The middle 6.0-inch brass liner was selected for laboratory analyses. The <br /> ends were covered with Teflon sheets and sealed with plastic caps. The brass liners and <br /> plastic caps were washed with an Alconox solution and double rinsed prior to use. <br /> The sampling technician wore disposable gloves while collecting all samples. <br /> Four soil samples were submitted for laboratory analysis and a screening process was used <br /> to gather information through field observations. The field screening included: <br /> • sediment type, especially grain size and clay content <br /> ' • moisture content <br /> visible evidence of contamination (i.e., color change due to reduction of iron or <br /> discoloration from hydrocarbons and other pollutants) <br /> ' • odor (OVM was not functioning and field observations were noted relating to odor in <br /> soil samples) <br /> ' Details on the geology encountered during the well installation, as well as the field <br /> observations, are included in Section 3.2, Geology and Field Observations. <br /> ' See Appendix B, Boring Logs for more information. <br /> 2.2.2 Soil Laboratory Analyses <br /> The following summarizes the soil sample testing used for this phase of work. The soil <br /> samples collected on April 12 and April 25, 2002, were delivered to Sherwood Labs <br /> (California ELAP No. 1400), of Hilmar, California, for the following analyses: <br /> • benzene, toluene, ethylbenzene and xylene (BTEX) by EPA method 8020 <br /> • gasoline range petroleum hydrocarbons (TPH-Gasoline) by EPA method 8015(m) <br /> • MTBE by EPA method 8020 <br />