Document NGLLJ2boJEg5NKRyMJNJjD4Xb

FILE NAME: National Gypsum (NG) DATE: 1956 July 5 DOC#: NG044 DOCUMENT DESCRIPTION: Letter to NG from Laverack & Haines, Inc. with Conclusions & Observations RE Atmospheric Tests * y 5, 1956 hticail G j p m CaaBaay 325 Delaware At . terral, tew Tort Attentions Hr. m . C. M. Pollard Gentlaaam Aa you raquaated w* f i w b*l*v th *ooau3al.n. and obarvatina a. one A total of 5A air aaapl., orar aa aaparata days, gave latent aad iatendttent parlad logical raaolta. aovarla aix Tba ~ unfarorahl* vl*a**d dlraatloa, oorf aowaa, weald bo tte wat-oeutbiaat, aad thia w u aaeeapllabad on ferafa 29th, 1956. Boworar, all oT the taata war oT aoaaldvahl* valua la dotanlalw !iJ*P^ T i? la * * #it* * teUafoata wfaon wind dIraltiL aada eontrlbotiaaa by year plaat aa tineaslbllity. pTohoarr*pKlanj*t *o"p*ar*a1t1lo-*oa, aathaArlrtta"m*ahaddtoyatthlae oaonaltsttadflaTtoeotthtee. a2irJbfytHof M nkjM k, te . te . ted f t J S , . iS j i: S i t IT d i!" " * ** " 11,0,000 tertteU. p w ^ L l. S i u i ! * ffTv**! ?*" * hT " ," < P t t t 4 te. dart te M t U a n l t e t26 S m S rtl % * to 1,152,000 partlolaa I,rl "* 3 on Taat te. U 5 n1m23i2q,u0i0t0*paereatoilaula*i.is.T * at Va.A. * llli?0'**!*.1* **Bt 18 oit7 ^ Bailorout* la w. tba addition oT duat oraatad by operation, in tte aity ite*lf. ** CL#A 403180 oonfc'd -2- That these aouroes exist la quit evident hgr the tart of March 27th, vfaan a oount of 2,000,000 partlelaa Is Taat Ko. 3 and 1,888,000 partial## is Taat lo. 5, with a wind bloving froa tha tova toward tha plant, tha taita ob May 25th, whan eousts of 2,288,000, 5,160,000, 7,120,000, and 3,060,000 partlelaa within tha elty wore road, asi Taloalty ao low and variable that transport froa your plant would have baaa Impossible. Tha only oonelusien that oan ba arrived at la tha writer's opinion. Is that, though your plant la aalttlng dost in rather high eonoantxatlana, fall-ant and dilution bring tha eonoaotratioa down to a negligible aaoust. 0 tha ether hand, tha testa Indicate that tha elty does tea objectionable eonoontrationa at tinea, but the eouroe of tla dtot la within tha elty Itself* Tha writer would rooeuaend, however, that dost eeotrel at tha 'plant -- ' be extremely deslmbln for tha peraaanal varklig there. The aedlaal profeaaloa la leaning nore and acre to tha opinion ttet duet, m aattar haw lnBoououa, aan bo harmful. 5a it oaold prmaext n haalth nrohlam, too. Hoping this ramary la helpful, wo remain, Very irmly years, IATKACX It HiIKES, IK . abtu.jl ASa. fBet.yHD0FlTrIaEo2tZaRr CE#A 403181