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<br />JUL 26 '93 12:03 <br /> <br />FROM DRVID BRRSLRU RSSOC <br /> <br />PRGE.002 <br /> <br />d .. .. <br /> <br />d.vid t>..-,.U b euociet..... I,;''''rp.....ted <br /> <br />1;;1'1::1 S"h .1I"'.e" ..... .ultie32:!i! . mlnn_colla, mn.. ee414 · telephone: S12-S31.45i' 1 <br /> <br />23 J\tl;r 1993 <br /> <br />1laCRWlD0II <br /> <br />!Os DM Jlcout:h1" <br /> <br />"'1 Da.. B:tulau <br /> <br />RBI addi1:ioual :It.ecoaaendat1.ons for 8b1e1.-4i:ng .of .ltCof 1qu1paen't <br /> <br />rol1owing my subs.quen't v1a1.t on tbe roof and a rw1ew of the pb~o. Df the <br />3,000 cf. and 31,000 efm 8cru.ber.r 1 agree ~bat higher ~arrle.. for this <br />equipment would be needed if tbey -r..to ~ .ff.oti... By pL.cing ~ ber- <br />d..ecs elo..r 'to 'the equipment:., 1:... width .01. th.:. baJ:orl.r. oaD be r.d\lce4. <br />81aoe ahi.lding of the cyclone will make _b... bfo..~~~ben !lOre ao'tlo.abl., <br />1 WCMi14 recOCllMlnc1 t.bat. 'two addl,ti.onal aquDd "rr1e~. be oo..tructed. Th1.a <br />IIhoald addre.. the ....jor no1_ ~s:ea.. on the ~f. It I118Y be belpl\ll 1:0 III8Jut <br />. ....\lr_nt. onc:8 th... are completed to det.entirm the eff.a1:i ".nes. of the <br />acoa.U.cal shielding_ <br /> <br />I bave .ke1:.chttc1 possible "err!.r oonll9\11:at.i.Ol1's ..on phCPt"9r.pb of t:.be t.wo <br />IJOrubbers. <br /> <br />3.000 efm scrubber (Att.achment 1) <br /> <br />Two barrier ..c~ion. approximat:.ely 10' wide an~.~1 b~gh.~ 1:han.tbe .crubbe~ <br />exbau.'t oo\lld be placed wi~h ~ho OO~.~ f~c1D9north. Tbie will minimize <br />reflection. from the ayolon. ..havst baoJt to 'the. _l~bborh004. '.rial. ~<<ur. <br />eggld be pl.ced .. 010.. .. 5' 'to t:he .~rubbex 1.f. .1.'t w111 not interfere wlt:.h <br />air flow. liDee refl~i.oD ~o ~e .00000h doee DOC. appeal: to .. . probl.a, 1 <br />wowld ac* tblnk that:. any ab.orpti.on need be pi.eM on 'the 8O'IIU faa. of t:.he <br />burl.x. <br /> <br />31.000 eflD scrubber (Attac=-nt 2) <br /> <br />'%hie 1s a ratla.r l8J.'9. pi.G. of .qulpaa.irt w!t:b no1._ _anat:1DIg from thlt fan <br />8broud .. well as tM exhaust:.. I' ~II. d.. on ~ .roof O~ be used to .up- <br />port the ba~ri.:t, 1.t would be a~o~.lJD..t:.ely 10 f..~ froaa t:.M fan. 1 <br />odgbally suggested a width of 36 feet for the ....11.. ~i.... BoweT8r, if <br />the barrier coald be plaoad clo.. enouOh to 'the '~1pment, it wou14 appear <br />