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.s <br /> Work Plan For Monitoring Well(MW-8)Installation <br /> 2130 West Washington Street Facility <br /> Stockton,California <br /> Sierra-Pacific Project No.95-119.02 <br /> 3.1 Field Preparations <br /> Field preparations will include a pre-construction meeting at the site with Sierra-Pacific <br /> personnel and the drilling contractor, and communication with various interested parties, <br /> including: Cargill, Port of Stockton, and CV-RWQCB. A well drilling permit will be obtained <br /> from the San Joaquin County Environmental Health Department (County). Prior to field <br /> activities, Underground Service Alert (USA) will be notified so that local utilities can locate <br /> underground pipelines, cables, wires, etc., that may be present near the proposed drill location <br /> within 10 days of the expected drill date. As a further precaution, to avoid drilling into or <br /> through potential buried obstructions, the first five feet of the boring will be augered by hand. <br /> Planning and project management will result in completion of the installations in strict <br /> compliance with State and San Joaquin County regulations. <br /> 3.2 Drilling and Logging <br /> A truck-mounted, 8-inch, hollow-stem auger will be used to drill the monitoring well. The soil <br /> boring will be logged and soils described in accordance with the Unified Soil Classification <br /> System (USCS). One or two brass-tube impact samples will be taken for reference purposes. <br /> Potable tap water will be used to hydrate bentonite, mix Portland cement concrete, and wash <br /> sampling tools. Cuttings from the well boring are expected to be essentially free of nitrogen- <br /> rich feed products. Regardless, drilling tools will be steam-cleaned before being removed from <br /> the site. Auger cuttings will be placed in 55-gallon drums and staged for disposal. <br /> The City of Stockton has authorized the discharge of non-hazardous well water to the sewer <br /> system, provided that metals and nitrates fall within established parameters. Field experience <br /> has shown that batches of rinsate from cleaning sampling tools at the site typically contain less <br /> than 20 mg//1 ammonium (NH4) and traces of nitrate (NO3). Several sets of quarterly <br /> monitoring data indicate that ground water from the proposed well (MW-8)will almost certainly <br /> contain less than 200 mg/1 nitrate (NO3). Rinsate from decontamination of auger sections will <br /> Sierra-Pacific Groundwater Consultants 2 <br />