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1 <br />1 <br />1 <br />1 <br />1.0 <br />2.0 <br />3.0 <br />FIELD METHODS <br />PERSONNEL AND PROCEDURES <br />All environmental work described in this workplan will be performed under the direction of a <br />California Registered Geologist, Certified Engineering Geologist or Hydrogeologist, or <br />Professional Engineer (hereinafter referred to as Licensed Professional). A qualified field <br />geologist will collect any subsurface soil and groundwater samples, and coordinate delivery of <br />the samples to a State of California -certified analytical laboratory. The Licensed Professional <br />will oversee the remedial activities during all phases of work, including soil sampling, well <br />installation, data analysis, and report preparation. All field procedures (e.g., permitting, <br />sampling protocol, chain -of -custody, Health and Safety Plan, etc.) will follow county and State <br />guidelines. <br />UNDERGROUND UTILITIES <br />Prior to conducting any drilling activities at the site, the location of underground utilities will be <br />checked by reviewing available blueprints of the site and by contacting Underground Service <br />Alert with at least 48 hours prior notice. All laws regarding excavating around underground <br />utilities will be followed including marking the proposed area for drilling with white paint at <br />least 48 hours prior to drilling and daylighting any utilities using hand tools for utilities "located" <br />within 2 It of the proposed boring location. PG&E crews will be utilized to locate all <br />underground gas supply lines. In addition, a soil probe and/or magnetic locator will be used at <br />proposed drilling locations where the presence of underground utilities remain unknown. The <br />upper 3 to 5 ft of each borehole will be advanced using a hand auger, posthole digger, or similar <br />device. <br />DRILLING AND SAMPLING PROCEDURES <br />3.1 Soil Boring and Soil Sampling Using a Hollow -Stem Auger Drilling Rig <br />Soil borings may be advanced and sampled using a truck -mounted drill rig equipped <br />with hollow -stem, continuous flight augers. Samples of the subsurface soils will be <br />collected at intervals no greater than 5 ft using a 2 -inch or 2'/z -inch I.D. split spoon <br />sampler, a standard penetration sampler, or a 5 -ft continuous coring device. The <br />standard penetration sampler will be used for the collection of soil samples for lithologic <br />description or sieve analysis, only. Soil samples collected using a standard penetration <br />sampler will not be used for chemical analytical testing. All drill bits, drill rods, augers, <br />etc., will be steam -cleaned prior to use at each site and between each borehole. <br />The following procedures will be employed when collecting and handling soil samples <br />by means of the hollow -stem auger drill rig: <br />1. Prior to sampling, the core barrel (or equivalent) and sample liners will <br />be steam cleaned or thoroughly washed with a solution of Alconox or <br />non -phosphate TSP and rinsed with potable water. <br />402 331-98 63 A-1 <br />