Laserfiche WebLink
ITG^1 <br />Before performing any quality assurance testing, the ultrapure nitro- <br />gen used in the testing was analyzed by GC for the 10 VOCs specified <br />in Guidelines. None were detected. The analytical report is provided <br />in Appendix H. Analytical tests for the nitrogen samples are desig- <br />nated by N2 BLANK. <br />The bags were checked for leaks by placing a weight on the nitrogen <br />filled bags and observing whether the weight lowered. To ensure that <br />each Tedlar bag was free of contamination, it was flushed five times <br />with previously tested ultrapure nitrogen filtered through charcoal. <br />In addition, 20 percent of the bags prepared for use in the sampling <br />program were tested by GC for contamination with the 10 VOCs. Analyt- <br />ical reports are included in Appendix H. Analytical tests for the <br />Tedlar bag samples are designated by 3 pairs of numbers (example, <br />34-39-01). No Tedlar bag used in the Foothill Sanitary Landfill <br />sampling program was contaminated or leaking. <br />To verify that the pumping system, consisting of the pump, piping, <br />needle valve, and rotometer, was clean, a pump blank was analyzed for <br />each pump used in the testing program. Before testing the pumps, the <br />sampling systems were cleaned by passing heated, charcoal -filtered <br />nitrogen through the pump and tubing for at least 12 hours. Pump <br />blank testing involves passing ultrapure nitrogen through the pump <br />system directly into a GC. The gas was then analyzed for the 10 VOCs <br />listed in Guidelines. None of those VOCs were found above the detec- <br />tion limits in the pumps used in the Foothill Sanitary Landfill <br />sampling program. Analytical reports are included in Appendix H. <br />Analytical tests for the pump samples are designated by PUMP for the <br />PJ9 9390405.00D 5-2 Rev. 0 09/07/88 <br />Emcon Associates <br />