Laserfiche WebLink
During this sampling event, purging wells by bailing was performed at the middle "B" casing wells only <br /> . Purging wells by bailing involved using a 15-inch by 6 5-foot bailer and repeatedly bailing water from <br /> the well casing until approximately three well volumes of water had been removed The bailer was <br /> decontaminated before and after use with a liquid AlconoxO detergent wash, a tap water rinse, and a <br /> thorough final rinse with deionized water During purging by bailing, periodic groundwater parameter <br /> readings were recorded onto the groundwater sampling data sheet These groundwater parameters <br /> included conductivity, salinity, temperature, and pH After recording the groundwater parameters, the <br /> purged water was transferred from five-gallon buckets to an on-site 1,000-gallon polyethylene storage <br /> tank pending waste profiling and removal <br /> Purging by pumping utilized a GrunfosO 1 5-inch diameter submersible pump, hose, and control box <br /> The pump was decontaminated before and after use with a liquid AlconoxO detergent wash, a tap water <br /> rinse, and a final rinse with deionized water The pump was typically lowered to approximately the <br /> middle of the screen interval of the well Approximately three well volumes of groundwater were <br /> pumped from the wells During purging, the above-mentioned groundwater parameters were recorded on <br /> a data sheet The data sheet also included start and stop time of pumping along with the total volume of <br /> purged groundwater Purge water was temporarily stored in a 55-gallon drum and later transferred into <br /> the on-site polyethylene tank <br /> Groundwater Sampling <br /> Groundwater samples were collected at each monitoring well using a new polyethylene, disposable bailer <br /> The groundwater recovered with the bailer was transferred into laboratory-supplied sample containers as <br /> needed per each analytical method For quality control and quality assurance purposes, an equipment <br /> blank sample was collected from the final rinse of the decontamination wash and a duplicate sample was <br /> collected from well MW-6 Upon collection, the sample date, time, and identification were written on the <br /> containers and on a chain-of-custody The sample containers were then placed in a sample cooler <br /> containing ice and transported, under strict chain-of-custody protocol, to the state-certified analytical <br /> laboratory for analysis <br /> 2 <br />