Document LQjEMg43BqZdMgybmEQKYBOb

V k INDUSTRIAL HYGIENE AIR POLLUTION MORTON CORN. Ph. D.. B. Ch. E. CONSULTING ENGINEER 310 BOWER HILL ROAD PITTSBURGH. PENNSYLVANIA IS228 March 25, 1970 /3 ol vrt- TELEPHONE 4IX - BSI.SXB7 Mr. J. L. Hyde Pittsburgh Corning Corporation Research and Engineering Center 800 Presque Isle Drive Pittsburgh, Pennsylvania 15239 fff Exhibit# Case # U.S. DISTRICT COURT EASTERN DISTRICT OF TENNESSEE Dear John: ted Lowering of Asbestos TLV and Tyler Plant I am wr^ing to answer the question posed by Dr. Lee Grant (your letter, March 13, 1970) with regard to the anticipated lowering of the ACGIH TLV for asbestos from 12 to 5 fibers/cm3# and the ability of the proposed Tyler ventilation system to meet this standard. As you know, we do not design ventilation systems to ensure a cer tain level of contaminant in the environment; we design to remove it completely from the source. However, whenever men and house keeping practices are involved in the process, they introduce vari ables which design and fabrication procedures cannot take into account. The best ventilation system can be fouled up by poor house keeping practices or procedures by operators which do not utilize the available ventilation facilities. The Tyler ventilation system is the best one I can design for these process operations. The plant manager will have to be sure that the system is maintained to ensure proper hood face velocities and duct conveying velocities. If this is done, contamination will emanate mainly from scrap handling operations, which are poorly controlled at this plant and at the Port Allegany plant. There were many discussions of scrap handling practices at Port Allegany and my recommendation to discard the Butler Building was not ac cepted in the final analysis. The Tyler system design is essentially the same as that used at Port Allegany, but it does not utilize the Butler Building, which is an improvement. In summary, the-ventilation systems for Tyler and Port Allegany-- are excellent, with the exception of the scrap handling feature. If the 5 fibers/cc TLV is exceeded upon start-up, modification of the scrap handling procedures will be required. PLAINTIFFS Sincerely yours. Morton Corn, Ph.D. Consultant pUlNTU+!> 1,, exhibit March 13, 1970 Dr. Morton Corn 310 Bower Hill Road Pittsburgh, Pennsylvania 15228 Dear Mort: I recently attended a meeting concerning our Tyler, Texas, manu facturing facility. During the meeting. Dr. Lee Grant mentioned that the TLV of asbestos is being reduced from 12 to 5 fibers/cm3. He suggested I contact you and obtain your comments on whether the proposed Tyler ventilation system, as presently designed, will enable us to meet these new and restrictive va1ues. I would certainly appreciate It if you could drop me a line letting me know your feelings on this matter. Very truly yours. r * INDUSTRIAL HYGIENE AIR POLLUTION Morton Corn. ph. d.. b. ch. e. CONSULTING ENGINEER 310 BOWER HILL ROAD PITTSBURGH. PENNSYLVANIA 16228 March 25, 1970 TELEPHONE 41* - SSI-SS37 BILLING PITTSBURGH-CORNING CORPORATION FOR CONSULTANT SERVICES RENDERED IN CONJUNCTION WITH PLANNING, RE VIEWING AND CHECKING VENTILATION PLANS FOR UNIBESTOS FACILITIES, TYLER, TEXAS. 2 days at $200/day <- $400 Respectfully submitted. MC:ng Morton Corn, Ph.D. Consultant NOTED AND APPROVE! /- 7e > 70 DATE cumins