of Methods 6010 and 6020 of EPA

Publication SW-846 Third Edition (November 1986) including updates I, II, IIA and IIB, as incorporated by reference in $60.17(i). For the purposes of a source test that consists of three sample runs. modify those requirements to include the following: two instrument check standard runs. two calibration blank runs, one interference check sample at the beginning of the analysis (analyze by Method of Standard Additions unless within 25 percent). one quality control sample to check the accuracy of the calibration standards (required to be within 25 percent of calibration), and one duplicate analysis (required to be within 20 percent of average or repeat all analyses). 7.2.2. Direct Aspiration AAS and/or GFAAS Analysis for Sb, As, Ba, Be. Cd. Cu, Cr. Co. Pb. Ni, Mn, Hg. P. Se, Ag, TI, and Zn. Analyze all samples in duplicate. Perform a matrix spike on at least one front-half sample and one back-half sample. or one combined sample. If recoveries of less than 75 percent or greater than 125 percent are obtained for the matrix spike, analyze each sample by the Method of Standard Additions. Analyze a quality control sample to check the accuracy of the calibration standards. If the results are not within 20 percent. repeat the calibration. 7.2.3 CVAAS Analysis for Hg. Analyze all samples in duplicate. Analyze a quality control sample to check the accuracy of the calibration standards (if not within 15 percent, repeat calibration). Perform a matrix spike on one sample (if not within 25 percent, analyze all samples by the Method of Standard Additions). Additional Information on quality control can be obtained from Method Environmental Protection Agency, EPA 7470 of EPA Publication SW-846 Third Edition (November 1986) Including updates I. II, IIA and IIB, as incorporated by reference in $60.17(i) or in Standard Methods for the Examination of Water and Wastewater, 16th Edition, (1985). Method 303F as incorporated by reference in $60.17. 8. Calculations 8.1 Dry Gas Volume. Using the data from this test, calculate Vₘₓ std). the dry gas sample volume at standard conditions as outlined in