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<br />9.0 MBTNOD <br /> <br />9.1 Precision results for semi•volaeiles and metals. An eastern soil <br />with high organic content and a western soil with for organic content vera <br />used !or the sari-volatile and metal leaching experiments. Both types of <br />soil raze analyzed prior to contaminant spiking. The results are shorn in <br />Table 6. The eoneantzations of eoneaninants leached from the soils vera <br />cotuiatantly reproducible, as shorn by cha for relative standard deviations <br />(RSDs) of cha zeeoveries (generally less than LO percent for most of the <br />compounds). <br />9.2 Precision rasults for volatiles. Four different soils vera <br />spiked and tested for the extraction of volatilaa. Soils One and Tro vera <br />from western and eastern Superfund sites. Soils 'ihcaa and Four rata <br />mixtures of a western soil with for organic content and cro different <br />municipal sludges. The results are sho~m Ln Table 7. Extract <br />eoneenerationa of volatile organics frog the eastern soil rare lover than <br />from the western soil. Replicate Leaehings of Soils Three and Four showed <br />lover precision than the leachacea £rom the Superfund soils. <br />REFERENCES <br />10.1 Emrironmental Monitoring Systesu Lboratory, 'QA Support for <br />RCRA Testing: Annual Reports.' EPA Contract 68-03-3249, <br />January 1989. <br />Research Triangle Institute, •Interlaboratory Comparison of <br />Methods 1310, 1311, and 1312 for Lad in Soils. U.S. EPA <br />Contract 68-01-7075, November 1908. <br />16 <br />