Document 0gXBXbnwaL17KGzORkDVpzebV

Hearing Clerk ' Department of Health, Education and Welfare Room 6-88 5600 Fishers Lane Rockville, Maryland 28052 2nd DRAFT WBP/PSP/bt 7/10/72 Re: Department of Health, Education and Welfare Food and Drug Administration 21 CFR Parts, 3; 121; 122; 128 Polychlorinated Biphenyls, Notice of Proposed Rule Making Federal Register, Vol. 37 No. 54, pp. 5705-5707 Saturday, March 18, 1972 Monsanto Company has been a manufacturer of various chemicals and other products since 1901. At the end of last year, Monsanto was the third largest chemical company in the United States. For many years we have supplied chemical products to almost every American industry and, in fact, through our research departments have played a role in the development of technology in many indus tries. On some occasions, a chemical compound with specific properties is developed to meet a need in a certain application. At other times, whether through innovative research or by happenstance, a chemical compound with unique properties is developed first and then applications are found for which the new compound is uniquely suited. So it was in a sense with polychlorinated biphenyls. PCB's were apparently first used commercially in the late 1920's. PCB's are chemical compounds with several very desirable qualities. They are very inert, substantially fire resistant and a non-conductor of electricity. As the properties of these new compounds became 0239843 PCB-ARCH0744001 o _2_ o known, they were put to use in applications where they seemed to be Ideally suited. Perhaps the first of these uses was as a di electric fluid in transformers and capacitors. In a* situations where/arcing of frl-aotrlei.fy could occur, the fire resistant and insulating qualities of PCB's were highly desirable. Monsanto's production of PCB's began in the mid-1930's. As the desirability of PCB's gradually increased for many applications bo did production of the material. Their fire resistant nature made them~a excellent choices for use as ^heat transfer fluids, Their Inertness gave long lasting qualities to lubricants. When used as an ingredient in coatings, they improved the waterproofing characteristics. Insofar as handling of the material was concerned, PCB's are con sidered less toxic than many other chemicals in everyday use.. Recently questions have been raised concerning the effect of PCB's on the environment. Hie persistent nature of the products, while so desirable from the standpoint of many industrial applications, began to work againstJj^fejT In the late 1960's, after sophisticated analytical procedures were developed whieh would determine minute quantities of PCB's, they were detected in the environment. It was later learned that PCB's could affect certain forms of marine terrestrial and avian wildlife. Early evidence Indicated that, like DDT, osptwto PCB's do not readily biodegrade In the environ ment. Recently it has been established that "!*!*<} PCB's are bio degradable, particularly the monochloro, dlchloro and trichloro, 0239844 PCB-ARCH0744002 o O 3 - with some evidence that the tetrachloro and pentachloro also shew- -SS3B& degradh Wn. L i When questions first began to be raised about the effects of PCB'S on the environment, Monsanto, in the light of newly rieveiwpod data, reviewed again thesQproductSand the applications in which -tt-4n used. While the environmental effect of PCB's was still in con troversy, Monsanto began unilaterally to take steps intended to reduce the entry of PCB's into the environment. Acting on its own, Monsanto stopped the sale of PCB's for use in plasticizer applica tions such as paints, sealants and coatings.1 A program was initiated' for reducing the sale of PCB's which provided that sales would be made only for use in applications where (a) the productsw*s necess from the standpoint of the public interest, and (b) no acceptable alternates were available. rSince sales as plasticizers had already been eliminated, the extended program further called for the termina tion of sales for use in hydraulic fluids and then the termination of sales for use in heat transfer fluids. Today, all PCB's manufactured by Monsanto Company are used by the electrical industry for dielectric uses such as in transformers and capacitors; applications for which we understand there are, as yet, no satis factory alternate products. \The manufacturing and sales reduction*~7 \ program undertaken by Monsanto was completely unilateral and not / because of any governmental requirement. The subjept regulations.J1 ! for fouk&t-vJ being proposed by the FDA will be the first ms#wr governmental I ------------ ( regulations affecting PCB's. We would now like to make specific comments concerning several of the proposed regulations. 0239845 PCB-ARCH0744003 u -4 - O I. TEMPORARY FOOD TOLERANCES f t> fc ^ ? (v t It is recognized that the current restrictions on the use of PCB's n,t4> U*. y virtually eliminate the-Tassewssfe^teie contamination of foods/6-ti*-***^ "--------------------- * t During the interim in which the use control program becomes fully effective the establishment of temporary tolerances for a limited group of foods has merit. Past incidences of high levels of PCB contamination in foods have been relatively few and have been attributed to an unusual single source and, In virtually every case, the source has been identified. Under these conditions the .effiSwblishmeW^o-P action level guidelines established for milk in 1969 at 5.0 parts per million on a fat basis and for poultry in 1970 at 5.0 parts per million in edible portions have provided excellent protection to the consumer. Since cr?\ r the establishment of these guidelines^no new information has been * A lu e developed to support the need for lower tolerance levels. ^The t< proposed temporary tolerances of 2.5 parts per million on a fat basis for milk and 5.0 parts per million on a fat basis for poultry do not- appear to be warranted and we respectfully urge that the levels be maintained as originally established. 0239646 PCB-ARCH0744004 O o - 5 - II. PROCESSING EQUIPMENT Monsanto basically agrees with the objectives of the proposed regulations relating to the use of PCB's in heat transfer processing equipment. In 1971 we discontinued sales of PCB's to these applica tions and have recommended conversion to other available fluids. ' V /'ft ti r x &. -O~-f~Lcl cX O' 1 To the best of our knowledge all systemsf in* food or food-related applications have been converted. A copy of a bulletin provided to our customers to assist them in their conversion is attached. The food Industryfrequires high temperatures to properly process its products. To achieve the desired results the continued use of existing heat transfer systems must be assured to prevent serious industry-wide disruptions. Our experience with converted units Indicates that, although great care is taken, some PCB's still remain in the system. The residual amount varies with such factors as the design of the system, the age of the system, and the operating temperature involved, there fore, no generalization can be made relating to the level of PCB's remaining in any given system. ______ 4 u>-C- The regulation as proposed prohibits the presence of any PCB's in a system. With the residual PCB's which will inevitably be present the industry will be prevented from continued use of its facilities and would not be able to achieve its desired processing results. It becomes mandatory, therefore, that good Judgement be exercised relating to the continued use of well run, properly managed systems S.V asrrxsu&ev* 0239847 P CB^A RCH0744005 o 6 - o to avoid the alternative of a total shutdown. Serious, thorough studies must be undertaken to determine acceptable residual PCB levels in converted systems. 0239848 PCB-ARCH0744006 o - 7 III. FOOD PACKAGING MATERIAL The proposed regulations contain a maximum tolerance level of five parts per million PCB's which would be allowed in food packaging material. The proposal of any standard for packaging materials at this time would appear to be ill-conceived. There are at least two areas in which more information must be developed before a reasonable PCB tolerance level can be established. First, accurate methodology for use in determining the exact levels of PCB's in the various materials used in packaging must be developed. Second, it is necessary to determine the actual rate of migration of PCB's from each different packaging material into foods. Since the com position of various na terials used in packaging foods varies to a considerable extent, this information must be developed with respect to a number of different materials. It may be that some materials contain no PCB's at all, while other materials which do contain PCB's prevent its migration into foods. In either case, a PCB tolerance level for the packaging material would appear to be .unnecessary. In any event, more information should be developed concerning analytical methodology and actual migration rates before a PCB tolerance level is established for food packaging materials. 02398*9 PCB-ARCH0744007 IV. CAPACITORS AND TRANSFORMERS Hie importance of continuing the use of PCB's as a dielectric fluid in capacitors and transformers has been generally acknowledged. Recent reports supporting this use include the Interdepartmental Task Force on PCB's report entitled "Polychlorinated Biphenyls and the Environment" dated May, 1972 and the Food and Drug Administra tion's "Environmental Impact Statement - Notice of Proposed Rule Making - Polychlorinated Biphenyls" dated May 8, 1972. In the food processing industry there are a number of applications of PCB-type electrical devices which cannot be adequately performed by substitutes. The hermetically sealed construction of capacitors and transformers, the very low failure rates, 0.1# to 0.2# per year, , the exceedingly low failure rate 'which could lead to loss of fluid, ' approximately 0.01#, and the existence of lost electrical function which would also occur on equipment failure signaling the operating personnel to take appropriate actions are all characteristics which ^ would tend to preclude food contamination. Banning of PCB-containing capacitors and transformers in factories engaged in food, animal feed or food packaging materials would result in extensive rebuilding relocating and re-equipping programs, all without demonstratable need. Monsanto, therefore, wholeheartedly supports the proposals relating to this rule making submitted for your consideration by the General Electric Company, the Aerovox Corporation and the Certified Ballast Manufacturers Association. * o2y850 PCB-ARCH0744008 o ) - 9 We recognize and appreciate the intention of the FDA to protect the American public from contaminated foods while not unnecessarily penalizing certain segments of the American public. We urge the FDA to move very carefully in establishing FCB tolerance levels in food since the only known Instance in which persons were affected by ingested PCB's waB the Japanese Incident of 1968 in which PCB's In rice oil were ingested at extremely high levels (2,000 to 3>000 ppm),fthere is no known incident of human life being affected by Ingested PCB's. We strongly urge that regulations not be promul gated established PCB levels in any medium other than food or food products.j-^ood tolerance levels can and should be~vigorously enforced, but PCB's used industrially in such a manner as to pre vent its coming in contact with food should not be subjected to / / FDA regulation. Respectfully submitted. 0239851 PCB-ARCH0744009