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located on the property to the east; it will be necessary to obtain permission from <br /> the owners before work can start. USA will be contacted to clear both locations <br /> in advance of commencement of operations. <br /> 1. Mobilize a properly licensed auger rig equipped with sufficient dean augers <br /> to complete each well without having to clean flights. <br /> 2. Coring equipment to consist of at least two (2) split-spoon samplers to allow <br /> cleaning of the sample barrel between cores. It may be necessary to take <br /> continuous cores through specified intervals. <br /> 3. Cores will be taken at 5' intervals from 20' bgl to 65' or at every apparent <br /> change in lithology, or as indicated by field conditions. The report covering the <br /> placement of the three monitoring wells indicated a perched water table at 57' <br /> bgl, but the evidence is inconclusive. Drilling will continue until there is no <br /> evidence of contamination in the samples. <br /> 4. Each core will be examined by the onsite geologist; a portion will be placed in <br /> a ziplock bag and tested for vapors with a PID meter, and another portion will be <br /> preserved for analysis. Drilling and coring operations will follow standard field <br /> protocol. <br /> 5. Drill spoils and unused core material will be placed in metal drums, clearly <br /> labeled and tightly sealed. They will be stored on site pending laboratory <br /> results, and will be properly disposed of. <br /> 6. Each soil boring will be completed by running blank and slotted 2"flush <br /> screw,joint PVC casing and sand packing as required. A schematic of the well <br /> completions is shown on PLATE IV. Unless field evidence warrants changes, <br /> the wells will consist of 20 feet of slots and the remainder blank. Groundwater <br /> was measured at about 32' bgl in July; it will be measured in one of the existing <br /> wells prior to completing. <br /> 7. After completion of the wells, they will be developed, purged, and sampled <br /> within 48 hours using San Joaquin Co. EHD approved methods. <br /> 8. Both soil and water samples will be transferred under chain of custody to a <br /> State Certified laboratory with instructions to analyse for BTEX, TPHg, and <br /> oxygenates using Tri-Regional & San Joaquin Co. approved procedures and <br /> detection limits. <br /> 3 <br />