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MAY. NO. r=24 P. 22 <br /> FIELD METHODS <br /> 1 � <br /> 1,0 PERSONNEL,AVD PROCEDURES <br /> I <br /> l All environmental work described in this workplan will be performed under the direction of a <br /> California Regist4rcd Geologist,Certified Engir:eering Geologist or Hydrogeologist,or <br /> Professional Engi eer(hereinafter referred to as Licensed Professional). A qualified field <br /> geologist will col ct any subsurface soil and groundwater sampies.and coordinate delivery of <br /> the samples to a Skate of Callfornia-certified analytical laboratory. The Licensed Professional <br /> will oversee -medial r activities during all phases of work, including soil sampling, well <br /> installation, data nalysis, and report preparation. All field procedures(e.g., permitting, <br /> sampling protocochain-of-custody, Health and Safety Plan,etc.)will follow county and State <br /> guidelines. <br /> 2.0 UNDERGRO UTILITIES <br /> Prior to conductiq%any drilling activities at the site,the location of underground utilities will be <br /> checked by revie%y'ing available blueprints of the site and by contacting Underground Service <br /> Alert with at least148 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 pri r to drilling and daylighting any utilities using hand tools for utilities"located" <br /> within Z ft of the roposed boring location. PG&E crews will be utilized to locate all <br /> underground gas upply 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 /> 1 upper 3 to 5 ft of ach borehole will be advanced using a Eland auger,posthole digger,or similar <br /> device. <br /> 3.0 DRILLING Al"SAMPLING PROCEDURES <br /> 3.1 Soil Bori i g and Soil Sampling Using a Hallow-Stem Attger Drilling Rig <br /> Soil bori*s may be advanced and sampled using a truck-mounted drill rig equipped <br /> 1 with hollow-stern, continuous flight augers. Samples of the subsurface soils will be <br /> collectedt intervals no greater than 5 ft using a 2-inch or!1/2-inch I.G. split spoon <br /> Istan sampler, dard penetration sampler, or a 5-ft continuous coring device. The <br /> standardenetration sampler will be used for the collection of soil samples for lithologic <br /> descripti or sieve analysis, only. Sail samples collected using a standard penetration <br /> sampler v ill not be used for chemical analytical testing. All drill bits, drill rods,augers, <br /> etc.,will $c steam-cleaned prior to use at each site and between each borehole. <br /> The follo*ing procedures will be employed when collecting and handling soil samples <br /> bymeans� fthe hollow-stem auger drill rig: <br /> Ili <br /> 1. Pi for to sampling, the core barrel(or equivalent) and sample liners will <br /> bi steam cleaned or thoroughly washed with a solugion of Alconox or <br /> n -phosphate TSP and rinsed with potable water. <br /> 402331-9863 A-1 <br />