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February 22,2012 <br /> _nn K rdey-Hom Page 5 of 15 <br /> r►�7 aM ftsoclates,Inc. <br /> wells, which will be analyzed for total and dissolved arsenic and lead. Three <br /> surface water samples will be collected from the canal immediately west of the <br /> Site. <br /> Monitoring Well Installation— <br /> KHA will retain a licensed water well contractor to install a deep, double cased, <br /> monitoring well in the vicinity of existing monitoring well SWG SHW-1. The <br /> deep monitoring well will be installed to a total depth of approximately 35 feet <br /> below land surface(bls). <br /> The deep monitoring well will be installed in the vicinity of SWG SHW-1. It will <br /> be constructed of a 4-inch diameter, schedule 40 PVC outer casing to a depth of <br /> approximately 25 feet bis with a 2-inch diameter inner casing to a depth of <br /> approximately 35 feet b1s.The monitoring well will be finished above grade.Both <br /> the 4-inch diameter outer casing and the 2-inch diameter inner casing will extend <br /> approximately 2 to 3 feet above the land surface. The monitoring well will be <br /> completed with a 2-foot by 2-foot concrete well pad. A locking pressure cap will <br /> be used to secure the monitoring well. <br /> Additionally, two shallow monitoring wells will be installed in, the Southwest <br /> Grove that will be used to further delineate the extent of arsenic in the ground <br /> water. One monitoring well will be installed north of SWG MW-5 and the other <br /> will be installed east of SWG MW-6. The two shallow monitoring wells will be <br /> installed to a maximum depth of approximately 20 feet b1s. The monitoring wells <br /> will be constructed of 2-inch diameter schedule 40 PVC casing with 10 feet of <br /> 0.010-inch machine-slotted well screen. The well casing will extend <br /> approximately 2 to 3 above laud surface and the monitoring well completed with a <br /> concrete well pad. The three monitoring well will be developed following <br /> installation. <br /> Ground Water Sampling— <br /> The eight existing monitoring wells (SWG SHW-1, SWG MW-1 SWG MW-2, <br /> SWG MW-4, SWG MW-4, SWG MW-5, SWG MW-6, and SWG MW-7) and <br /> three proposed monitoring wells will be sampled for total and dissolved arsenic <br /> and lead. Each monitoring well will be purged prior to sampling. Throughout the <br /> purging process, pH, specific conductivity, temperature, dissolved oxygen, <br /> oxidation/reduction potential and turbidity will be measured and recorded. <br /> Samples will be collected once the field parameters have met the FDEP's <br /> stabilization criteria. The monitoring wells will be sampled for total and dissolved <br /> arsenic. <br /> The ground water samples will be placed on ice following collection and <br /> delivered to the Advanced Environmental Laboratories, Inc. (AEL) under chain- <br /> 46 <br />