ARCHIVED REPORTS_XR0002452 - Laserfiche WebLink

Home Browse Search

• All purging equipment will be thoroughly deoontanunated between each well,using the procedures previously . described at the beginning of this section. • During sample collection for volatile organic analysis, the amount of air passing through the sample is minimized This helps prevent the air from suipping the volatiles from the water Sample bottles are filled by slowly running the sample down the side of the bottle until there is a convex meniscus over the mouth of the bottle. The hd>s carefully screwed onto the bottle such that no air bubbles are present within the bottle If a bubble is present, the cap is removed and additional water is added to the sample container After reseahng the sample container,if bubbles still are present inside,the sample container is discarded and the procedure is repeated with a new container Laboratory and field handling procedures may be monitored, if required by the Ghent or regulators,by including quality control (QGj samples for analysis with the groundwater samples Examples of different types of QC samples are as follows • Trip blanks are prepared at the analytical laboratory by laboratory personnel to check field handling procedures Trip blanks are transported to the project site in the same manner as the laboratory-Supp hcd sample containers to be filled. They are not opened, and are returned to the laboratory with the maniples collected. Trip blanks are analyzed for purgeable organic compounds • Equipment blanks are prepared in the field to determine if decontamination of field sampling equipment has been effective The sampling equipment used to tolled the groundwater samples is rinsed with distilled wate trAUSPOrt0d to er which is then decanted into laboratory-supplied containers The equipment the site laboratory,and are analyzed for the same chemical constituents as the samples collected at• Duplicates are collected at the same tune that the standard groundwater samples are being collected and are analyzed for the same compounds in order to check the reproducibility of laboratory data. They are typically only collected from one well per sampling event. The duplicate is assigned an identification number that will not associate it with the source Well tri blanks and :field blanks check field handling and transportation procedures Duplicates check ' P les is determined by Clearwater depending on site conditions laboratory procedures The configuration of QC same and regulatory requirements Ci sARWATm GF-our(GWS) 2 revised April 4,2002