Laserfiche WebLink
• Groundwater grab samples will be collected using either a new disposable polyethylene <br /> or Teflon bottom-valve bailers, or stainless steel bailer. <br /> • Groundwater grab samples were placed into laboratory-supplied containers containing <br /> preservatives, where appropriate. See Sample Retention and Analysis below. <br /> • Groundwater was discharged from a bailer via a bottom-emptying device. Discharge to <br /> the containers was conducted in a manner to minimize bubbling and agitation of the <br /> liquid. The container were filled to the top forming a meniscus to eliminate the <br /> headspace. <br /> • Following all sampling activities,the borings were backfilled with 20:1 cement bentonite <br /> grout. <br /> Sample Retention and Analysis <br /> • All samples were placed on ice in an insulated chest cooled to a temperature of <br /> approximately 4 degrees Celsius. <br /> • Chain of custody procedures, including the use of chain of custody forms, were used to <br /> document sample handling and transport from collection to delivery to the laboratory for <br /> analysis. <br /> • The samples were retained in the insulated chests preserved with ice overnight in the <br /> custody of an IT employee. The samples were picked up after the sampling was <br /> completed by a courier supplied by the laboratory, or were delivered to the laboratory by <br /> IT personnel. The samples were transported to the laboratory in a motor vehicle. <br /> • Laboratory quality assurance/quality control procedures are summarized below: <br /> — Method Blank Frequency =one per 20 samples <br /> — Matrix Spike/Matrix Spike Duplicate= one per 20 samples <br /> . — Laboratory Control Sample/Laboratory Control Sample Duplicate one per 20 <br /> samples <br /> fnh ms nTed- bgrr,umOFvOO'vR+wra�&3V9as2��2aaaa B-2 <br />