Laserfiche WebLink
approximate locations shown on the attached site plan. The final <br />boring locations are subject to modification based upon the best <br />available gradient data at the time of drilling. <br />During drilling, soil samples will be collected at 5 foot intervals <br />for logging purposes, and at the capillary fringe for analytical <br />purposes. A total of three soil samples will be submitted for <br />laboratory analysis based on their location in the capillary <br />fringe. Analysis will include BTEX, and Total Gasoline, Diesel and <br />Kerosene hydrocarbons. <br />Wells MW -10 through MW -12 will be constructed using 2 -inch diameter <br />schedule 40 PVC casing in borings B-10 through B12, respectively. <br />The wells will be screened using 0.02 -inch slot from approximately <br />15 feet below first encountered groundwater to 15 feet above first <br />encountered groundwater to allow for cyclical fluctuations in <br />groundwater observed in existing wells at the site. A sand filter <br />pack appropriate for the slot size will be placed from the bottom <br />of the screen interval to approximately 2 feet above the screen <br />interval. We will place a two foot bentonite seal above the filter <br />pack and a bentonite/cement grout mix from the top of the bentonite <br />to ground surface. The well head will be protected with a locking <br />cap and set inside a traffic rated christy box. <br />Upon completion the three newly installed wells will be developed <br />by surging and pumping until turbidity is minimized. The well will <br />be purged 48 hours later. A minimum of three well volumes (casing <br />and sandpack) will be removed using pH, temperature and electrical <br />conductivity stabilization as parameters for estimating sample <br />representativeness. Water samples from each newly installed well <br />and existing wells with sufficient groundwater to allow sampling <br />will be collected and submitted for BTEX and Total Gasoline, Diesel <br />and Kerosene hydrocarbons analysis. Prior to collecting <br />groundwater samples from the wells, water levels and free product <br />(if any) will be measured in the new and existing wells, and <br />wellhead elevations will be surveyed. <br />Laboratory services will be provided by Argon Laboratories (DOHS <br />Cert. #1873). <br />Bailing of free product from well MW -8 and MW -9 has been initiated <br />and will continue. Product thickness, depths to water and amounts <br />recovered are being logged. <br />A technical summary report will be prepared, which will include all <br />analytical results, a groundwater gradient plot, free product <br />recovery data and recommendations for additional work at the site. <br />It is anticipated that no further characterization activities will <br />be necessary prior to preparing a corrective action plan. <br />All field and laboratory activities performed at the site w411 be <br />conducted in accordance with the previously submiited Quality <br />Assurance/Quality Control Plan. <br />