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N) <br /> CONESTOGA-ROVERS <br /> &ASSOCIATES <br /> July 21, 2010 Reference No. 070001 <br /> -3- <br /> Utility Clearance <br /> Each boring location will be cleared to 5 fbg using a hand auger to assess any unknown utilities <br /> prior to drilling. <br /> Soil Borings <br /> CRA will conduct drilling four borings using a truck mounted drill rig equipped with <br /> hollow-stem augers. After hand clearing to 5 fbg,the four borings will be advanced to <br /> approximately 8 fbg and 16 fbg using 8-inch diameter augers. Soil will be logged continuously <br /> using the Unified Soil Classification System. Soil samples will be collected from the three pond <br /> bottom borings at depths of 6-inches,2 feet,4 feet,and 8 feet. Soil samples from the <br /> background boring will be collected at a depth of 6-inches,and will be collected at 2 foot <br /> intervals beginning at 2 feet to the maximum explored depth of 16 fbg. The samples will be <br /> labeled,entered in a chain-of-custody form,and then packed on ice in coolers and sent to ALS <br /> Laboratory Group (ALS) in Houston,Texas for analysis. CRA's standard field procedures for <br /> soil boring advancement are presented as Attachment A. <br /> Chemical Analysis <br /> Selected soil samples will be analyzed by DI-WET (De-ionized Waste Extraction Test) method <br /> for the following constituents: <br /> • TDS by EPA Method 160.1 <br /> • Nitrate as N by EPA Method 300.0 <br /> • Sodium by EPA Method 200.7 <br /> • Chloride by EPA Method 300.0 <br /> Soil and Water Disposal <br /> Soil cuttings will be temporarily stored onsite in 55-gallon steel drums, sampled for disposal <br /> purposes,removed by United Pumping Service, and transported to a UPRR approved disposal <br /> facility. <br /> Reporting <br /> Upon completion of the above soil investigation activities and review of the analytical data, <br /> CRA will prepare a subsurface investigation report that will include: <br /> • A summary of the site background and history <br /> • Descriptions of the drilling and soil sampling methods <br /> • A figure illustrating the boring locations <br /> • Boring logs <br /> • Tabulated soil analytical data <br /> Worldwide Engineering,Environmental,Construction,and IT Servlces <br />