Document pBq6BX6EDD0jLkeepd170MaRE

i^i .'.EV <w <^w-----m--^> ATTACHMEMT XIV ) EES. L7DU UPOSNT* tCS *&G2 DE NEMOU R S 5. COMPANY INCORPORATED P. 0. Box 1217 PARKERSBURG. W. VA. 2S101 POLYMER PRODUCTS D6PARTMENT AR226-2141 CC: R. J. Burger L. W. Goin A. C. Huston T. L. Schrenk G. H. Stoltz R. N. Taylor P. Thistleton R. J. Zipfel August 7, 1981 J. W. RAINES Polymer Products Department Wilmington - B-5625 C-8 GROUND-LEVEL CONCENTRATIONS - WASHINGTON WORKS Attached is a report from R. I. Mevodau, Engineering Services Division, concerning C-8 ground-level concentrations for Washington Works. Concentrations of C-8 were calculated using C-8 emission estimates based on a capacity production* and meteorological data covering a five-year period.** Annual mean, eight-hour maximum, and 1-hour maximum C-8 concentrations were calculated for 2400 points in a receptor grid. Concentrations of C-8 were calculated for two cases: Case 1A represents concentration estimates for the period before May, 1981. Case 1 represents expected C-8 concentrations after the May, 1981 shutdown (when dryer stack heights were increased by 15 feet). In sunraary: Case 1A and 1 annual mean C-8 concentrations are wel 1 be 1ow the provisional AEL of 10 ug/m3. The highest Case 1A annual mean C-8 concentration is only about 5% of the provisional. AEL. Since long-term accumulation of C-8 in the blood is a major concern, the annual mean concentration is the most important indicator of potential employee exposure. * Actual C-8 emissions wilt be Tess since Teflon production does not always operate at capacity. ** Meterorological data collected -in the Parkersburg area between January 1, 1973 and December 31, 1977 There's a world ol things we're doing something about EID079710 J. W. RAINES - 2 - AUGUST 7, 1981 Se}o?5e AH Case 1A and 1 eight-hour average C-8 concentrations are provisional AEL. The highest Case U e.ght-hour average is about 83% of the provisional AEL. eInxcpreecatsedingandnruyael r msetaanckC-8hecigohntcsenbtyrat1i5-onfeseat t rethduece1d5 the selected receptor points by an average J3%. O^.^Ab^cA^.-o Joseph G. Loschiavo Attachment Addressee Only JGL/nsw 0057W EID079711