Laserfiche WebLink
26 June 1998 <br /> AGE-NC-98-0452 <br /> Page 4 of 5 <br /> 9. Monitor auger returns and soil sample duplicates for the presence of volatile organic <br /> compounds using an organic vapor meter equipped with a photo-ionization detector (PID) <br /> pre-calibrated to isobutylene. <br /> 10. Log auger retums and soil sample duplicates in accordance with the Unified Soil <br /> Classification System. <br /> 11. Place auger returns on plastic sheeting and place rinseate in 55-gallon DOT drums and store <br /> on-site. Disposal alternatives will be evaluated based on results of laboratory analyses. <br /> 12. Complete each boring as a ground water monitoring well. PVC casing with 0.020-inch <br /> slotted screen will be installed from 20 to 5 feet bsg with blank PVC casing extending to the <br /> surface. The proposed monitoring well construction is illustrated in Figure 3. <br /> 4.2. MONITORING WELL DEVELOPMENT <br /> 1. During monitoring well installation, surge the water in each well using a surge block or <br /> bailer to settle the sand pack prior to installation of the overlying bentonite plug. <br /> 2. During initial ground water monitoring, purge additional water until essentially sediment <br /> free. <br /> 4.3. GROUND WATER SAMPLING <br /> I. Survey the top of each well casing to the nearest 0.01 foot relative to an arbitrary benchmark. <br /> 2. No sooner than 72 hours after installation, measure to the nearest 0.01 foot, the static water <br /> level in each monitoring well. <br /> 3. Using a submersible pump or dedicated bailer, surge and purge each monitoring well. At <br /> least three well volumes of water will be removed from each well to stabilize temperature, <br /> pH, and conductivity; stabilization parameters will be measured at regular intervals during <br /> purging. <br /> 4. Collect ground water samples from each well using disposable bailers; samples will be <br /> collected in 40-m1 VOA vials and I-liter amber bottles. <br /> 5. Label and log water samples on a chain-of-custody form. <br /> 6. Store the samples in a chilled container and transport under chain-of-custody to a state- <br /> certified laboratory for analysis. Ground water samples will be analyzed for TPH-d and <br /> . Advanced CeoEnvironmental,Inc. <br />