COMPLIANCE INFO - Laserfiche WebLink

Home Browse Search

ADVISORY — ACTIVE SOIL GAS INVESTIGATIONS TABLE 2 (continued) Preferred Analytical Methods and Modifications* Method/ Parameter GC/MS Methods GC Methods COMMENTS Modified USEPA 8260 Modified USEPA TO-15 Modified USEPA TO-17 Modified USEPA 8015 and Modified USEPA 8021 Container Blank One sample container per 20 samples or per batch, whichever is more often. One sample container per 20 samples or per batch, whichever is more often. One sorbent tube blank per 20 samples or per batch, whichever is more often. One sample container per 20 samples or per batch, whichever is more often. Monitor other components (i.e., fittings/ valves) of sampling system if needed. Holding Time Analyze syringes within 30 minutes of collection; analyze glass bulbs within 24 hours following surrogate addition; analyze passivated stainless steel canisters within 30 days; analyze polymer gas sampling bags within 6 hours. Analyze passivated stainless canisters within 30 days; sulfur and nitrogen compounds and bis- chloromethyl ether should be analyzed within one week. Up to 30 days refrigerated. Exceptions as noted in Section 10.10 of USEPA TO-17. Analyze syringes within 30 minutes of collection; analyze glass bulbs within 24 hours following surrogate addition; analyze passivated stainless steel canisters within 30 days; analyze polymer gas sampling bags within 6 hours. Other Requirements Tuning: 50 ng Bromofluorobenzene (BFB) initially and every 12 hours. Meet acceptance criteria as per Table 4 of USEPA 8260. Tuning: 50 ng BFB initially and every 24 hours. Meet acceptance criteria as per Table 3 of USEPA TO-i5 Must meet equipment specifications in Section 7.2 of USEPA TO-15 or report results as modified TO-15. Analytical protocol as per USEPA TO-15. Condition freshly packed (new) sorbent tubes. Collect and analyze "Distributed Volume Pairs" for uncharacterized sites as per Section 10.7 of USEPA TO-17. Determine/ validate "Safe Sampling Volume" (SSV) if needed as per Sections 10.8 and 13.1.2 of USEPA TO-17; analyze as per USEPA TO-15 and Section 11.2 of USEPA 10-17. Analytical precision test as per Section 11.3.2.2 of USEPA TO-17. Performance criteria as per Section 14 of USEPA TO-17. Use only for routine monitoring at well- characterized sites. Other than TPH, identification of new compounds must be confirmed either by second column or different detector, and then 10% of those samples must be confirmed with a GC/MS method. *Adapted from "Guide to Environmental Analytical Methods" 5 th edition, Edited by Roy-Keith Smith, Ph.D., Genium Publishing Corp., 2003. (1) Initial, one-time demonstration of ability to generate acceptable accuracy and precision. Procedure may need to be repeated if changes in instrument, methodology or personnel occur. USEPA Method 80008 (Determinative Chromatographic Separations), Revision 2, December 1996 (SW-846 Manual). 121 Mid-level NIST (National Institute of Standard and Technology) traceable (where available or equivalent) vapor- phase standard. No internal standards and surrogates were suggested by the method. The compounds are to be selected by the laboratory analyst and they must be similar in analytical behavior to the compounds of interest. The analyst needs to demonstrate the internal standards are not affected by method or matrix interferences. There is no limit on the number of samples per batch for Reporting Limit Verification. If the RL is set at the lowest calibration point, then this verification is not needed. July 2015 38