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S ECOR <br /> ATTACHMENT B <br /> FIELD PROCEDURES <br /> Exploratory Drilling <br /> The well will be overdrilled using 10-inch hollow-stem auger drilling equipment. No soil samples will be <br /> colleted. All down-hole drilling and sampling equipment will be steam-cleaned prior to and following the <br /> completion of the soil borings. Down-hole sampling equipment will be washed in a trisodium phosphate or <br /> alconox solution between samples. <br /> Groundwater Monitoring Well Installation and Development <br /> The groundwater monitor well will be completed by installing a 2-inch diameter, flush-threaded, <br /> schedule 40 PVC casing with 0.020-inch factory-slotted screens. Approximately 15 feet of screen will be <br /> used to construct the monitor wells. A #3 sand pack, or equivalent, will be placed in the annular space <br /> across the entire screened interval, extending approximately 2-feet above the top of the screen. A 2-foot <br /> bentonite transition seal will be placed atop the sand pack, followed by a neat cement seal, extending from <br /> the top of the bentonite transition seal to the ground surface. The boring logs will show well construction <br /> f details. <br /> The development procedure for each well consists of swabbing the screen interval and pumping or bailing <br /> approximately ten casing volumes of water from the wells. The well development sheets will be included <br /> in the assessment report. <br /> Soil Cuttings and Purge Water <br /> Soil cuttings generated during drilling operations will be stored onsite in 55-gallon drums onsite pending <br /> characterization. Water generated during equipment cleaning will be stored in 55-gallon drums onsite <br /> pending characterization. The soil and water will be removed from the site by a licensed disposal <br /> contractor and transported to an appropriate disposal or treatment facility for proper disposal. <br />