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RESULTS OF A METHOD VERIFICATION STUDY FOR ANALYSES OF PCP IN SOIL
Citation:
Kreighton*, K. L., J Evans, AND D. Patel. RESULTS OF A METHOD VERIFICATION STUDY FOR ANALYSES OF PCP IN SOIL. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION. AWMA, Pittsburgh, PA, 43(10):1408-1411, (1993).
Impact/Purpose:
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Description:
As a prelude to a field demonstration of the fungal treatment technology by the SITE Program, a field treatability study was performed to select optimal fungal species and loading rates.using the site-specific soil matrix contaminated with Wood preserving wastes: PCP and PAHS. uring the field treatability study, differences in extraction methods of two laboratories performing soil analyses were noted. he technology developer, USDA Forest Service's Forest Products Laboratory, utilized n-hexane:acetone (1:1) as the extraction solvent; the SITE Program subcontracted laboratory used methylene chloride via USEPA SW-846 Method 3550. ther differences were-also noted. omparison of the two extraction solvents on a quantity of soil obtained from the site and contaminated at high and low level concentrations was undertaken. recision, accuracy, and reproducibility were the primary evaluation criteria. imits of acceptability were matrix (PCP) spike recovery greater than 17% and relative percent difference between duplicate matrix spike pairs less than 47%. hile both methods met acceptability standards, and differences in values generated by the two methods were less than the 47% comparative standard, variability as measured by relative standard deviation (RSD) generally was higher with the FPL method (RSD of 13% vs. 3.8%; 34% vs. 9.5%; 14% vs. 8.5%; and 19% vs. 23% for comparable sets of FPL and SW-846 results, respectively). urrogate recovery was generally higher with the SW-846 method. ethod 3550 using methylene chloride, therefore, was selected for analyses during the upcoming project.
