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1 <br /> ' GeosyntecO <br /> consultants <br /> chlorinated herbicides (former North Pond only), and nitrate as N analyses. The <br /> brass tube ends will be covered with a teflon sheet and capped. <br /> 2. The second brass tube will be used to collect three En Core® samples for VOCs <br /> and three En Core samples for low level 1,2,3-TCP analyses. <br /> 3. The remaining brass tube will be used to log the soil type and to screen for <br /> VOCs using a PID, or, if a duplicate soil sample is required, the third brass tube <br /> will be used to collect the duplicate sample for analyses listed for the first brass <br /> ' tube. <br /> 4. If a duplicate En Core sample for VOC and low level 1,2,3-TCP analyses is <br /> required, the sample would be collected from the top 6-inch brass tube of the <br /> ' next 18-inch split-spoon sample interval. <br /> If elevated PID readings are detected within 3 ft (along the boring) of a proposed sample <br /> listed in Table 1, the following protocol will be used for collecting a soil sample from <br /> that interval: <br /> • If PID screening of the proposed sample location does not indicate elevated <br /> VOCs, the proposed sample will be moved to the location of the elevated PID <br /> reading, or <br /> • If PID screening of the proposed sample location also indicates elevated VOCs, <br /> a sample will be collected deeper of the two locations. <br /> Collected samples will be placed in a cooler with ice and kept below 4 degrees Celsius. <br /> Samples will be shipped under standard chain-of-custody procedures to Calscience <br /> Laboratory (Calscience) of Garden Grove, California. <br /> ' 3.2.3 Groundwater Sampling <br /> Once the groundwater table has been reached, a steel rod will be advanced 5 feet into <br /> the saturated zone through the center of the hollow stem auger. The rod will then be <br /> retracted, exposing a 5-foot long disposable screen. A disposable bailer will lowered <br /> through the rod to collect a groundwater sample. <br /> Groundwater samples will be placed in a cooler with ice. Samples will be shipped <br /> under standard chain-of-custody procedures to Calscience. <br /> Work Plan—Stockton Pond Inv_01-07-08 9 01.07.08 <br />