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09 May 1996 <br /> AGE-NC Project No. 96-0217 <br /> Page 4 of 5 <br /> labeled D.O.T. model 17H 55-gallon drums or placed on plastic sheeting and stored on-site <br /> in an area inaccessible to the general public. Disposal alternatives will be evaluated based on <br /> results of laboratory analyses. <br /> 13. Complete one soil boring as a two-inch diameter monitoring well in accordance with the well <br /> design in Figure 3, <br /> 14. If field observations determine that hydrocarbon-impacted soil and/or ground water is more <br /> extensive than anticipated, additional borings may be advanced at the site. Locations for <br /> additonal borings will be discussed with a representative of the PHS-EHD prior to <br /> advancement. <br /> 4.2. MONITORING WELL DEVELOPMENT AND SAMPLING <br /> For the collection of ground water samples, the following items will be included: <br /> I. Develop the monitoring well using a submersible pump until water is essentially sediment free. <br /> Development will be performed no sooner than 48-hours after completion. <br /> 2. Survey the top of each well casing to the nearest 0.0I-inches to determine the elevation <br /> relative to an arbitrary benchmark. <br /> 3, No sooner than 48 hours after installation of the ground water monitoring well, measure to <br /> the nearest 0,0I foot, the static water level in the new well. A water-hydrocarbon interface <br /> probe will be used to determine if free-floating hydrocarbon product is present in the well (if <br /> necessary). <br /> 4. Using a dedicated bailer or submersible pump, surge and purge the well. At least three well <br /> volumes of water will be removed from the well to stabilize temperature, pH, and <br /> conductivity, while stabilization parameters will be measured at one-gallon intervals. Ground <br /> water samples will be collected using polyethylene disposable bailers, samples will be <br /> collected in 40-ml VOA vials preserved with hydrochloric acid. <br /> 5. If the removal of free-floating hydrocarbon product is necessary, it will initially be performed <br /> using a disposable plastic bailer. However, depending upon the thickness of the free product, <br /> a mechanical method will likely be required to successfully eliminate the hydrocarbons. <br /> 6. Label and log water samples on a chain-of-custody form. <br /> 7. Store the samples in a chilled container and transport under chain-of-custody procedure to <br /> a State-certified laboratory for analysis. Water samples will be analyzed for TPH-g, BTE&X <br /> and MTBE in accordance with EPA methods 5030/8015 and 602. If MTBE is detected by <br /> method 602, a confirmation sample will be analyzed by EPA method 8260. <br /> 8, Store purged water in properly labeled D.O.T. model 17H 55-gallon drums on-site in an area <br />