Laserfiche WebLink
' Decontaminated Teflon bailers will be used to purge the monitoring wells If well yields are <br /> high, a pump may be used for purging Well purge volumes are established at three well volumes or <br /> the stabilization of field parameters, the exception to this standard is in the case of low-yield wells <br /> When purging low-yield wells, the well will be bailed dry Samples will be collected as soon as the <br /> ' well recovers at least SO percent If recovery exceeds 4 hours, samples will be collected as soon as <br /> sufficient volume is available <br /> Ground-Water Sample Collection <br /> t <br /> Ground-water samples will be collected immediately after purging each well Ground-water <br /> ' samples will be collected using a stainless steel or Teflon bailer equipped with a double check valve <br /> To ensure ground-water sample representativeness, it is critical to avoid physically altering or <br /> ' chemically contaminating the sample during collection, transfer, and preservation Sampling <br /> personnel will wear clean protective gloves during all sample collection activities Samples will be <br /> placed inside precleaned labeled bottles provided by the analytical laboratory The laboratory will <br /> also add preservative, if appropriate <br /> General ground-water sampling procedures include the following <br /> • Do not place clean bailer directly on the ground <br /> ' • Check the operation of bailer check valve assemblies to confirm free <br /> operation <br /> ' • Lower the bailer slowly into the well to avoid degassing of the water and <br /> damage to the equipment <br /> ' • Raise the bailer slowly from the well to avoid agitating the water <br /> ' The bailer sample contents will be carefully poured into the sample containers provided by the <br /> laboratory <br /> SAMPLAN 162 <br /> 044-0162UCATRI-05iU M 20 <br />