ARCHIVED REPORTS XR0012594 - Laserfiche WebLink

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1.011,I31ppg �" Li Soil Sam fib Soil borings and soil sampling will b2 performed under the direction of a Delia.ngineer or beolog9at. The soil borings will be advanced using a truck-mornted hollow-stem auger drill rig. To reduce the chances of cross-contamination between borchoies,all downhole drilling equipment will be steamed-cleaned between each boring. To reduce cross-contamination between samples, the split-barrel sampler will be washed in a soap solution and douLfe-rinsed between each sampling event Soil sampling will be done in accordance with _ ASTM 1586-84. Using this procedure, a'2-inch outside-diameter split-barrel sampler or a 2-inch inside-diameter California-type sampler is driven into the soll by a 140-pound weight falling 30 inches, After an initial set of b incrs,the number of blows required to drive the sampler an adaittonal 12 inches is known as penetration resistance,or the 'N• value The N vat4e is used as all empirical measure of the relative density of cohesionless soils and the consistency of cohesive soils. The sampler will be fined with three 2-inch diameter.6-inch long bass tube;. Upon recovery,a portion Of the soil sample will,be placed into a soil sample col.LXtion jar and sealed for later screening with a photoionization detector(PIIS). Anotherphrtion of the snit sample.will be used for classification description. The soil sample collected in the lower most brass tube within the California-type samp!and will be capped,packaged,and preserved according to Ircepted EPA procedures for possible laboratory analysis. 1.2 Soil Classinestion As the samples are obtained in the field,they will be classified by the crew chief/geologist in accordance with the United Soil Clissification System (USCS). Representative portions of the samples will be retained for further exam iVation and for verification of the field classification. Logs of the borings indicating the depot and identification of the various strata, the N value, arid pertinent information regarding the n.ethod of maintaining and advancing the borehole will be made. - 1.3 Soil Sample Screenlq hNu Portable Photoionizsr(ion Detector Method : The portion of the sotl sample retained for organic vapor screening will be placed into a Clean _- ---_--___---sail sample coliection jar;-Each jar will be filled approximately one-half full Ihcn the mouth of the jar. - - — will be covered with aluminum foil and dapped with a lid. Jars wig be placed put of direct sunlight for. at least 20 minutes,allowing time for the air in headspace and soil to equilibrate. The probe of the PID will be inserted through the aluminum foil,and the highest obsei,�ed reading recorded oil the soil boring log. : 1'�