APPENDIX. QUALITY CONTROL RESULTS FOR DUPLICATE PAIRS PLOTTED AGAINST EACH OTHER 10,000 F a L T TT TTT T TT i @ Duplicates overlap within 2 ¢ L © Duplicatesfail to overlap within 2 TTT TTT T oO é// } / L L i e,/ 100 |- 7 7 / 7 / 0 o* _ 4 4 _: .4 7 || ”O a 100 d 1 @ 7 | — os : y / 10 L@ 10 / / - / Yo C . Yo Yo 1,000 | c » ° S / fo L 2 99171 / _ s TT | peo 1,000 bo 10,000 Aliquot B (pCi/g) Figure Al. Acceptable quality control results for duplicate pairs analyzed for 90Sr in soil by Environmental Analysis Laboratory. Results depicted are for concentrations between 10 and 10,000 pCi/g. Broken line represents perfect agreement and is not a fit to the data. 29