Laserfiche WebLink
RE BIDDING AND MINIMUM REQUIREMENTS FOR DEVELOPMENT, <br /> PURGING AND SAMPLING OF MONITORING WELLS <br /> The task-, required for each well are <br /> DEVELOPMENT <br /> 1 ) Suige and pump well construction materials with a surge block and or stainless steel <br /> bailee Remove sufficient amount of material to clear well screen of construction <br /> material and remove all sediments from well casing to create a conduit toe repie,,entative <br /> sampling <br /> Pump or bail a minimum of five volumes from well to complete development <br /> 2 ) Containment of all purge and development water in D O T 17 di ums <br /> 3 ) Sound the well for total depth <br /> 4 ) Cap off and replace monument top <br /> PURGING AND SAMPLING <br /> 1 ) Clean off and open wellhead monument, secure area with appropriate traffic control <br /> 2 ) Initiate a detailed field monitoring log <br /> 3 ) Screen well head annulus for the presence of volatile aromatics with the use of a <br /> calibrated photoionization detector <br /> 4 ) Scan for the presence of free floating product with a product intertace metes <br /> 5 ) Confirm depth to water and overall depth of each well (cal(,ulate Standing water <br /> column) <br /> I <br /> 6 ) Complete a 3-5 well volume purge with a 2" Grundfos stainless steel submersible or a <br /> environmental bladder purge pump <br /> 7 ) Record the Ph, Conductivity, Color and Temperature of each volume to establish and <br /> confirm well development <br /> S ) Contain all purge & decontamination water in D O T 17 steel drums <br /> 9 ) Bail and Sample each well with a teflon, stainless steel or disposable bailei <br /> 10 (A bailer blank will be collected prior to sampling each well) <br />