Document KJNMN04YZZrxvbymxa8ee71L6

COMPANY CONFIDENTIAL BCCl P. 0. BENIGHUS D. A. OLSON July 8, 1970 Hr. F. 0. JenklnB Vice Preoldent, Materials Sprague Electric Company North Adams, Kaeeachuactte 012^7 Boar Mr. Jcnkinsi I was fortunately able to visit your Brown St, Plant on June 17 with Randall Graham. I personally found the discussion lnTomatlvo and interesting end 1 was most favorably impressed with the concern ana interest expressed by your manage.`lent personnel. Wo discussed briefly Bomo or the points raised in your letter dated June 11, I will try in tide letter to be wore specific, B1 od cera dab ill ty - Biodegradation studies conducted Tn~bur research laboratories in St. Louis, Missouri and In Ruabort, V.'cles using media consisting of local river waters or activated sludges aocllmatod to biphenyl give direct evidence that tho lower chlorinated biphenyls are affected. Tnere Is some evidence that chlorine position on the biphenyl configurotion does lnflucnoo the dogreo of dlfitructlon by tho microorgonis-ns. 2 have enolosod a tabulation from our Ruabon laboratory Which attempts to show thic difference. Wc do not have fonnal information regarding the affect of sunlight or other natural influences on Aroclorc, Experience gained over many years indicates Aroclors are highly stable under all Known conditions present in the environment. Toxicity - lhere is ample evidenoe from many laboratories that certain species of birds which are at the top of the marine food chain cannot reproduce properly when rCB's are prooent in thoir diets, The b. ti. Fisheries laboratory at Oulfbreezo, Florida conducted a study which indicated that Juvenile brown shrimp did not survive in water containing 5 parts per billion of PCB. Attached are copies of reports on these studies. HARTOLDMON0024845 COMPANY CONFIDENTIAL Fiona an to has sponsored some studies on laboratory rats and docs, A euiivaary of the results to date is attached. Disposal - The preferred method for dioposol is High ie'-vxsrature incineration, 1 suspect there are several oor.mcrc ial burners on the market *hich will perform well. 1 personally witnessed burning tests at the John Zink Company's unit in Tulsa, Oklahoma. rat urea must exceed 1000 P to assure that completo destruction is achlovcd, Lower tcaper- atureD would only vaporise the Aroclors and create atmoopherio pollution or, worso yet, would fora, by partial oxidation, tnatcrialo which could be highly toxic (e.g. furono and dioxins). Vith incineration 11C1 is for.nod which must bo scrubboa from the stack pas and neutralised before disposal. V.c aro planning for an initial installation in one or our plants later this year. As a service to our customers who may not have access to other incinerators, we have offered to accept scrap Aroclor for itn-nydaate storage and cvontual incineration. Tentatively, ttonatnto will ehaT^'e .V per pound of returned Material. This charge does not lncludo freight or container costs and will be reviewea when final Incineration costs ere established. Material which is returned for disposal should bo addressed to Monsanto Company, V, G. hrua-nrich Plant, gauget, Illinois, Attontioni Supervisor Department 24L. Solids contaminated with Aroclor present a biggor challenge. As yet, we have not tested an Incinerator With theca materials. Until we get ruorc information the beat wo can advine le safe burial in an authorised, properly operated land fill located away from any watertystems. We have laboratory work underway on other foros of destruction. As yet no economically feasible approach h&a been found. Analytical Hothodology I have attached copies of MonBentoro ana'IytTcai procedures for the determination of PCB'o in water, soil, air cmd biological sa?4>los. Vo are interested in eoapai'ing our methods with those devised fcy other laboratories. Any comments your laboratory may have would be welcome and appreciated. TRAN 062409 HARTOLDMON0024846 3- o I hope that the above information is ueoful to you If I can be of furthor service, please let me know Sincerely, a* ccI Mr. H. Dovis Sprague Bloctric 0. R* Orohaa V. B. Papaseorge Kanoper Bivironavental Control c. COMPANY CONFIDENTIAL TRAN 062410 HARTOLDMON0024847