SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Vironex Environmental Field�ices - HRC Page 4 of 5 trapped by the HAPSITE@. The subsequent laboratory work with MTBE determined a workable response test level. It was determined that a conservative reproducible response test level would be at 100 ppb in 500 mL of water (See Figure 3). Figure 3: Ability to Detect MTBE (Current MIP Configuration is Unable to Detect MTBE) , K.vas iu..vc t,a.n:•.;+ia+x .�.sa ii grf ,_. .'sJ iilil MYAMA fila LG{l ftllp WM4NL H1f ....... ...............��.,n...... ........................, u. .11l�NN�1M! fit 4� m xA I f �'1 'fix ep 0, .4 M�`. Field Testing Results: A real world test was then needed to verify th laboratory results. Geoprobe@ had done previous MIP testing at a fief within their facility, where it was known that a large PID response could be obtained at a depth of 25-30 feet. A series of MIP pushes was performed with the integrated MIP- HAPSITE@ configuration. As in the lab testing the MIP flow was split 50:50 being sent equally to the traditional PID/DELCD detectors and the HAPSITE@. As expected a large PID response (indicating aromatic hydrocarbons) was encountered at 25 ft. The HAPSITE@ was able to concentrate the MIP flow from 25-30 feet and speciate the aromatic hydrocarbons that caused the PID response (see Figure 4). Previous to this test Geoprobe@ had not known what compounds were causing the PID response. It may have been large concentration of a highly regulated compound such as benzene or as it turns out large concentration of hexanes and pentanes, which are not highly regulated. This site demonstrated the value of 100% identification of contaminants in-situ Figure 4: Example of Output from Contaminated Zone(No DELCD response/Large PID Response) http://www.vironex.com/pages/support_hapsite_mip.html 1/10/2006