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discharge water stabilizes. The field geologist will record water quality parameters during development using a calibrated Horiba U52 water quality meter (or similar). Well development and groundwater sampling records will be recorded on a Water Sample Log Form, and/or on the sampler's daily field report. The information to be included on well development and groundwater sampling records will include: ■ Name of sampler, ■ Total depth of well, casing diameter, and well volume, ■ Starting groundwater level, ■ Time log of groundwater removal, general clarity, temperature, pH, and electrical conductivity, ■ Total well volumes removed, ■ Sample bailing rate, ■ Time of sample acquisition, ■ Final depth to water, and ■ Any problems encountered and their solutions. Water produced during the development process will be temporarily contained in 55 -gallon drums. Groundwater will be discharged to the ground surface is laboratory data indicate that concentrations of VOCs are below Maximum Contaminant Levels (MCLS). If VOC concentrations are higher than MCLS, the purged groundwater will be disposed of at the ground surface near the monitoring well in a manner that does not cause erosion or affect the well. 3.4.5 Aquifer Testing Following development and sampling, bail -down and recovery tests will be performed in the new wells to help identify aquifer properties for later use in predicting the fate of groundwater impacts. Bail -down tests will be performed by bailing the wells dry, and then monitoring recovery of the water levels (similar to a "slug out" test). The data from the bail -down tests will allow calculation of hydraulic conductivity. 3.4.6 Groundwater Sampling and Analysis Groundwater samples will be collected from each new monitoring well and analyzed for the routine monitoring parameters. Groundwater samples will be collected by GLA's field geologist following the procedures outlined in the Practical Guide for Ground Water Sampling (Barcelona, et al., 1985) and RCRA Ground water Monitoring Technical Enforcement Guidance Document (U.S. EPA, 1986). Wells will be sampled using new, disposable polyethylene bailers. Prior to sampling the wells, the depth to groundwater will be measured to the nearest 0.01 foot from an established well datum (e.g., top of casing) using a decontaminated electronic 11 2011-0115 CHSL EMP Workplan Geo -Logic Associates Revision 1- August 24, 2011