WORK PLANS - Laserfiche WebLink

Home Browse Search

TUN — 1 — TUE 1 336 GERR 'r N I 1-4 t-1 I I ham �• x x CONTROL Splits of all samples will be lagged for hydrologic character under the Unified Soil Classification and and tem U.S. Bureau of Mines rock color chart . A continuous geologic log of cuttings will be made as the come off a�sger . These logs will be plotted as graphic and descriptive the Soil ologs at a scale of 1 inch equal to !d feet . QUAL I T Y CONTROL All sampling equipment and tools will be decontaminated on site before each goring and rinsate contained in visqueen pends fOr evaporation or disposal . All sample collection devices will be steam Cleaned or washed in Tri Sodium Phosphate and double i rinsed in clean water . If there is vapor detectable levels of contamination in the rinsate the rinsate will be contained in DOT 55 gallon drums and manifested to a hazardous waste disposal facility , If no detectable contamination exists in the rinsate then the rinsate will be allowed to evaporate and the residue transported with the contaminated soil to a HWMU. Duplicate (bottom and middle tube in the spit spoon sample) samples will be taken at 10 foot depth in soil boring l and 15 foot depth in soil boring 2. In addition i trip blank will be run for every 20 samples (5-10 and one field blank before the last sample on every sampling day in which more than one boring is completed . This check sampling is in addition to the lab method blanks and surrogate sampling . MON1TOR WELL CONSTRUCTION Should sail borings be converted into monitoring wells they will he constructed in accordance with L,UET guidelines . The included diagrams show the specifics of typical well to be constructed in isolated or traffic areas. The monitoring wells will be used as piezometer and initial water sample collection wells unless a formal monitoring schedule is required . The screen intervals will be 15 feet unless cor}fining zones are encountered within the proposed screen interval . In this case screen intervals will be reduced to 5 feet with three feet being below and two feet above the water table . As with the soil borings the drill cuttings from the well construction will be screened with an OVA and containerized in DOT drtims for appropriate disposal later . PROJECT TIME FRAME rhe historical review should take about 1 day to complete . The first round of soil borings should be completed in two days if the borings are not converted to wells. 5 „