ARCHIVED REPORTS_XR0007038 - Laserfiche WebLink

Home Browse Search

' Assurance Plan Water generated during the monitoring event is disposed of according to the accepted regulatory method pertaining to the site SOIL VAPOR SAMPLING ' Soil Vapor Extraction wells are purged using a vacuum pump until a minimum of three well volumes of air has been removed Purge volumes are calculated based on the volume of the tubing making up the sample line If three well volumes cannot be removed or if the well screen is submerged samples are not collected The air sample is collected in a Summa ' Canister, labeled and handled according to the Quality Assurance Plan ' LOCATING UNDERGROUND UTILTITIES Prior to commencement of any work conducted below surface grade, the location of the borings is marked with white paint as required by law An underground locating service ' such as Underground Service Alert (USA) is contacted The locating company contacts the p Y owners of the various utilities in the vicinity of the site to mark the locations of their underground utilities lie QUALITY ASSURANCE PLAN This section describes the field and analytical procedures to be followed by ENSR throughout the investigation ' General Sample Collection and Handlina Procedures Proper collection and handling are essential to ensure the quality of a sample Each sample is collected in a suitable container, preserved correctly for the intended analysis, and stored 1 prior to analysis for no longer than the maximum allowable holding time r Water Sample Collection for Volatile _ _p Oroanic Analyses For volatile organic analyses (VOA), the water sample is decanted into each VOA vial in such a manner that there is no meniscus at the top of the vial septum 1sOA cap with a Teflon quickly secured to the top of the vial The vial is inverted and gently tapped to see if air bubbles are present If none are present, the vial is labeled and refrigerated according to the Sod and Water Sample Labeling and Preservation section