Document baqgdXve1gBmNLJw8x7NMRZ9y

NEW YORK UNIVERSITY MEDICAL CENTER School of Medicine 550 FIRST A\ EMJE, NEW YORK. N.Y. 1001b AREA 212 b'0-5200 CASIO ADDRESS MCMEDIC Department of Medicine May 28, 1969 Mr. Sam Convery National Lead Company New York, New York Dear Mr. Convery: Enclosed please find a rough draft of the minutes of the meeting on May 26th for your comments and corrections. Thank you for your interest. Sincerely yours, JNB/mcc Enclosure Meeting held at the Kockefei1er University, May 26, 1569, 10:OG a.m. Sponsored by the Buildings Research Advisory Board of the Motional Academy cf Sciences. The meeting opened with a discussion of childhood lead poisoning wnich covered the following points: The disease occurs in poor children, ages i - 5 yrs living in poorly maintained housing. They may come to the hospital ill with anemia, cramps, kidney trouble or convulsions. A considerable number of those children develop permanent brain damage. Another group which is excessively e^pos to lead may be discovered by the use of various screening tests; the degree cf nervous system damage in these cnilcren is unknown. The children (SC-55%) be come intoxicated because of the ingestion of lead containing piaster and paint which is readily accessible on the walls, doors and window sills of their apart ments. There is little lead present in new paint or or. toys, however, much lead paint is used outdoors in New York City and the question of outdoor exposure is still open. Children found to be poisoned must be hospitalized for de-leading with chelating agents, a procedure which is net totally benign. In addition, they cannot be returned to their former environments unless the heme is de-leaded. There are two questions which are still not concretely resolved: ]) What are effects of long term subclinicai exposure? 0000-NLI-000020792 N 1130.01 - 1. 2) Is there a preferred topographic site from which chi Icron incest the most lead? New York figures based on 630 cases: 15% + samples woodwork 23% samples plaster These figures were discussed as to why is yield of positives so low? a) sampling error - maybe b) methodologic - method checks out okay c) samples taken from places previously replastered d) plaster surface first pspared then painted over, hence, no old paint used. e) lead pipes? Only 2.5% of water samples tested have high lead content, f) does window putty contain a great deol of lead? It was suggested that a systems analysis apprcdlpti. be used ar.d the to:lowing scheme was offered: 1) detection 2) alteration of active substance as--4t~s-t-ts. >r\ 5,1^ 3) removal of substance 4) covering substance a) material b) adhesive 1) Detection - Epidemielogy suggests that all apartments of certain type, under certain conditions manifest the hazard. 0000-NLI-000020793 -3Present methods of detection - 3 samples/r--cjy-wtf." - by sanitariciwith analysis by chemical or atomic absorption. Inadequate - a) insufficient samples b) insufficient manpcwer c) too s1ow Other methods for analysis, i.e. flame photo*<fn* present same sampling p rob1ems. The newest development is a lead detector.- rCnO57 source --~ y--cmo-t-t*?r ac wail o i--w'C. io-- r w^rrz nsad--frri-so4^-oX Jk KE^/x-rsys by-read. It p+eice--t*p a layer of 5% lead paint under 15 coatsc\ non-lead with a 15 second response time. ^ A. ,-c^ Questions were raised about scatter and the absorption of the x-rays by other roarer I ai s oyw? lead-paint especially barium sulfate a major component of Litf.cpone paints (used from 1920-1950). One of the participants offered the investigators a supply of Lithopone type paint to perform studies on this point. It was noted that the city hopes to start field trials of the instrument in July, it was suggested that Western Nuclear Research, a part of the State Universi-ty of New York, might be able to furnish further technical aid.^Once detection feasible what steps can be taken? 0000-NLI-000020794 I. Behavioral - a)\ Label the 1 area so that pare its nay be aware of y__, orb attempt to keep children from io. The psycnosocial difficulties involved in this type of approach were discussed briefly. b) Creation of lead free "play rooms" in ecl\ affected building. Felt to be a good suggestion but not adequate to meet total problem. \vt*\ 11 EnvironejStal Change - a) Application of distasteful substance to area. particularly highly pe'rrr,cable oil basey spray - little known - must be .non toxic - little further discussion - remains area for further investigation, b) Overcoat of anions which smr.tiouco combine -tfi lead to become insoluble at physoologic conditions so ingestion would not be followed by absorption. Salts suggested were ^orates and sulfates 'boon discussed since one is too toxic the latter too soluble. c) Actual covering of surfaces by inert substance which would isolate wall. Features to be considered in any material: 1) strong - i.e. hard to punctuate 2) proof 3) fire resistant in terms of combustibility and vclalfiiity as toxic vaoor 4) would not involve strain on existing streuture of building. 5) optimal cost a) installation including labor and materials 0000-NLI-000020795 b) maintenance cost Approaches covcreo several c i,.3 voi t tnat the meter available are adecuate to do the job. f,.a ' or questions oe i no ;/n i or. cost anc too use cf different techniques for flat and curved surfaces, in dealii with f131 surfaces the following suggested; i. Films - a) Gyps^um board 5^/square foot materials - expensive sophisticate: installation. b) Wall cover materials (fiber glass ,,C1C - .015" thick (Cwor.s-Cc rn ing or Johns Kar.sville for Sherwin Wi 11 iams) loose paint and plaster must be removed prior to application, SGir.e patching may be necessary. Supplied in V0,; wide sheets adhesive is applied with a roller over the sheets. This -costs lOq/'sc. root for materials. With two coats of pain it has lasted very well for at least iO years. Total cost 43d/sc. foot. c) Paper - easily applied - car. be made strong, fire retarding with cclcr can be applied on unsound wail - in horizontal fashion - cost about lq/sq, foot. U.S. Plywood has used paper adherent to wood thejvcovered with sickle coat of pa; 0 outdoors for 30-40 years in good results. People to contact: St. Regi, Union Ei'-Camp., Kimberly-Clark, Crown - Zfller bac{\. u d) Vinyl coat sheeting - complete with industrial adhesive for application. Has very low maintenance can be tailored to order, least combustible of piast;cs, 0000-NLI-000020796 -o - at 1Oq/ sq. foot including adhesive (not iabor) Only possible dissavanta , \\ *! result tnat surface kzxx*ix becomes tacky; 2) at low temperature these become Dottle. it was decided neither of these w'as a signifies:. problem,, Rigid vinyl board is available but sheeting seemed to be preferable to all participants largely because of labor factors. Actual cost of these materials will be provided by the represented!ve of Armstrong and it was further suggested that other companies to contact were Ur. I on Cere icie, Diamond Alkali, Ftfcastcr.a, B.F. Goodrich, Groce Chemical, Doreens. 11. Liquids - General problems surrounding liquids include the following: a) are coats strong enough - i ,,g. vinyl paints are r.ot as strong as vinyl rilms b) thickness control c) heavier films contributjto adhesive problems d) Need for some wall preparations - sanding, rcb^(-- , cleaning, etc, Nonetfceless, the following paint type compounds were suggested: . UC 1) ^fethane base paint 2) Pigmented masonry conditioner - excellent if flaking scaling paint removed - can contain zinc cxide to prevent mildew - Has chinawood oil or tongue oil base which really permeates - some questions'were raised over strength of fin^lh in face of aggressive child. t 0000-NLI-000020797 Curved surfaces can be handled with liquids described above, he..ever, if sheet ir. is used on flat surfaces some ether kind of approach is necessary for sills, moldings, etc. iff possible it is desirable to down to base wood, Ctr.erA wise the use of vinyl chloride spray is suggested. This requires masking of surfaces not to be sprayed. There is some fire hazard during application b~t ii trie of none afterwards. The filih formed is quite tough, but not as strong as the v.a films. It should be applied as spray. Fortsble airless spray units which are self atomizing can be used. Aerosol cans are quite expensive, k'ai nscoati r.g tc 5* seems adequate no matter what method used. Other approaches anc preducts may be available from the Society of Plastics Engineers, Union Carbide, National Starch and Adhesives. The cons'g/v\f-.>o> of the group was that a panel of methods must be available for use in the affected dwellings. In order to establish a suitable armamentaria. a demonstration project should be set up consisting of no less than 12 comparable apartments. These would be treated with a variety of methods (3-6) using both union and indi^^rv^ labor with time, materials, labor, cost analysis undertaken with at least a two years study period. It was felt that the industries pres'ented with this kind of approach would be most happy to donate materials and some services 0000-NLI-000020798 Once effective practical methods cf ce: tested for their ability to prevent cr. i . - rcft t rc !T; be I ng excez o i v o i y ox j c s ec This is a somewhat more diff ice It Stacy but can probably be worked cut ay a engineers multidisciplinary group including physi cians; erw i rcr.menta! /nxiupuia, social workers, housing experts and people fro m tr.e involved industries anc labor groups - perhaps under the auspices cf The question of whet methods con ae- use b to rooivore incest ry to develop so- for these problems was discussed. i r.cor.ti ve of a guaranteed r.arbet c o -j o be offered. Programs could be proposes ox. .r.ooeoc EfiG wn ; cn OtTerec I coco ores tenants financial recwarcis arte profess 1 or,o i c. t c i or uotcr.vots at rchao i i i tai Low interest loans should be aval lab!: for unis kind of r_nahiliration. The attitudes of the courts which alio.-, . ! .i.c little Eiutkaux penalty should be altered. to vicnuce houuit*g \.c c e u 0000-NLI-00002079