Document 7ReZDzB75GZ8g6Q3GwpM3BR6B

MEMORANDUM To: Mr.J. M. Butcher Dr. T. G. Day Mr. P. W. Gregory F. E. Medford, M. D. Mr. A. Pauley Mr. M. E. Perry nJJ o'. Z f 9*/? /4---- PLAINTIFF'S EXHIBIT UC-3X80 May 24, 1968 From: Fred Williams Subject: Supplemental Asbestos Air Sampling Data t The attached diagram shows air sampler locations and smoke test pattems^chile tjie results are shown on a separate chart for asbestos air sampling jilding 770 - 5hop7' "Tlie air sampling was done while two 5-gallon drums were being covered with Kaylo insulation byMay 16, 1968. wore a Half-face respiratory device to prevent inhalation of the material. Even though the two window exhaust fans were operating, all but two of the windows were open. The open windows reduce the effectiveness of the fahs. Note the smoke pattern when released in the vicinity of the insulation operation. While only one result of the air samples wos in excess of the TLV of 5.0 million particles per cubic foot of air, the wearing of the respiratory device was justified during this period of sampling. Apparently, the airborne insulation did not travel very far from the source. However, good housekeeping will be necessary to prevent accumulation of the asbestos fines which may become airborne via wind currents or dry sweeping. F.Williams/ebc ndustrial Hygienist UCC 000351 DIAGRAM - ASBESTOS AIR SAMPLING Date: May 16, 1968 By: R. O. Midkiff -1 fExhaust Fan 770 - SHOP Welding Shop Some Welding Fumes / 7 Sample *111 Horizontal Band Saw Exhaust Fan ^ ^ Smoke drifting from smoke tube. * Sampler location. UCC 000352 ASBESTOS AIR SAM PLING -2 E It; 5 "2 oa 00 04 OE ^ I o-- ^ E* 'O'... J51-S o t< iif Seos O H- U < o. 0 X 1/1 1 R IV 0z Q 2 v -CO) 8. 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'cf CsJGt-o C^ZZLc ^c \i-^C-i ^' ^rx- c?- O ' > ! Vl-1-W.vXx_^ . Li "^K^^Zcc u? Lk-J~-cj 1 c &<< '<-<-i't'\^'ic jt+- ^ 'f cTvC. c J)i (t v >--L/ fyZc>-J.^ (J"X- <2<:,^r- < d ^C- UCC 000358 ^7 7 O - 2i . .6-- c l1---- tP CL (V ZfjMt IrTc * 1 ^ / --/ A/- yc^> ~v / C>A- > i v_-j d ^ a di* c- ^>2/0 UJju^iiu^ tp L-C-C^rUU a^isztcsd' To "?&<* ?> cLdd&J i^v 0>O oaju\-^ XrJ^-~ ~cb-^ Cy Trh^.% ^ 7. J 'll'2'U ^fx,<vK *pU-t^ - Yp***- ) 7iU*i ft v l y V * .*> ^ n / i y x\ ^ ^ <r> UCC 000359 77'- ^ 'W7 2. UCC 000360 Dqfe S/9/71' INDUSTRIAL HYGIENE SAMPLING Location " Bldg. ^7 7^ Room 2- -S i JZI CaJuJnlr, edudao . 3ovxl^c^jCj c$ JLj3-TW S'G TrlO- /Peso^rs fittcKiiM ,*> q-x&A" /a0______cf jy, SamplTng Equipment Used Operation being monitored UCC 000361 INDUSTRIAL HYGIENE DEPARTMENT A5IESTO OUST STUB* Department '' ' ______________ tide. ' '~<7. o P8*** " ' Time Sampled By: /- _____________ Analyzed By: C- /T?>>v---- Method:------ General Conditions:._____________________________________________________ ___________ C (- .. . / /H i ! V ' : ' ' /; V/ ------i----- f----------- ' (> - * ` t' . ' FIBER COUNT (Fibers > 5a in Lenoth) Slide 1 1> 2 ,,> It 12 3o 13 40 14 5 (r 6O 7a 8o 9o 10 c? 15 16 17 18 19 20 ,^ o o o o o c? - o' Total U Avg,_ 1 2 3 4 5 6 7 8 9 10 Total Slide 2 o > / 'I J o 0 o 0 o c tl o 12 o 13 of 14 o 15 a 16 17 18 19 2______ 20 - Ava. __ CALCULATIONS SAMPLE VOLUME: ^ Min. @ LPM = / LITERS (Avg,Fiber Count-Avg.Blank CountMTotal Filter Area) Concentration .Fibers per Mi 11 i 1 i ter> 5A (Counting AreaHVol .Air-Liters)( 1000) I ( - )()_______________ . ( )( (, )(I000) " Fibers per Milliliter > 5A 2.( - )(L_ ( ){ & HI000) Special Conditions: Fibers per Milliliter > 5>M Remarks:i?c-co({i}C-/i <j-seAs - /op c Jr.-TY UCC 000362