Document ByjYMNNNn33g3gEYMy645n46L

50983 DOW CHEMICAL U.S.A. PLAINTIFF'S EXHIBIT DOW-162 TEXAS DIVISION FREEPORT, TEXAS 77541 ENVIRONMENTAL HEALTH REPORT RE-EVALUATION OF ASBESTOS EXPOSURES, CELL SERVICE, A-1323 AND A-1022 BUILDING FILE NO.. A10-196 DATE September 12, 1973 R.L. Silverthorne L. G. Trahan---------------B. S. Horvath CHECKED DATE T-IV-T3__________ Summary The cell service employees exposure to asbestos fibers were re evaluated during the diaphragm drawing operations. The timeweighted average and peak exposures to asbestos fibers are within acceptable levels, though the peak exposures could approach the maximum allowable concentration. The employees should continue to wear respiratory protection during the weighing and dumping of asbestos into the drawing vat. Attached are recommendations that could reduce exposure to airborne asbestos to employees even more than the precautions already taken. c/> --t o cn co o cn 4T- N Distribution J. M. S. F. File Hart A-1003 Edquist A-1201 AN OPERATING UNIT OF THE DOW CHEMICAL COMPANY 'S&sSMJ nV . - File No. A10-196 2- - ST0580543 PROBLEM Industrial Hygiene was asked to re-evaluate the exposures of Cell Service employees to asbestos fibers during the diaphragm drawing operations. CONCLUSIONS (1) The employees time-weighted average and peak exposures to asbestos fibers are within acceptable levels. (2) During the weighing and dumping of asbestos, peak concentra tions could approach the maximum allowable concentration for short term exposure. The men working around the pulling tank when asbestos bags are handled and dumped into the vat should continue to wear respiratory protection. RECOMMENDATIONS (1) Empty asbestos bags should be stored in a plastic bag and sealed before disposal. (2) Employees who work regularly with asbestos should have clean work clothes daily. (Work clothes are not to be takn home for laundering). (3) Continue the work practice of wearing respiratory protection whenever asbestos is handled. (4) Showering should be compulsory at the end of the work day for those employees with significant exposures. (5) Engineering methods to be utilized to eliminate asbestos exposure to employees. PRESENTATION OF DATA Table I, II, and III shows the operators exposure to asbestos fibers based on an 8 hour day when the drawing operation is in progress at A-1322 and A-1022. His time-weighted average and peak exposures were within acceptable levels based on the present standard. Table A shows the results of the sample analyses for the various Cell Services operations. The highest asbestos fiber concentra tion, up to 5.86 fibers/ml., were found during the weighing and du L File No. A10-196 C. -3- PRESENTATION OF DATA (continued) dumping of asbestos. Because of the variability in the asbestos handling procedures (and in the fiber counting technique) the operator peak exposures _could exceed the allowable ceiling concentration. The men working around the drawing vat, during -the handlingof dry-asbestos,-should-wear respiratory protection. Asbestos fiber levels exceeding 0.5 fibers/ml were found only in the immediate area of the drawing vat. The exposures of the other employees working in the building were well within acceptable levels. Their_TWA*Lexposure would be_ in the .01 to .03 fibers/ml range. SAMPLE AND ANALYSIS Breathing zone and general area air samples were collected on 47 mm diameter (.8 micron pore size) membrane filters at a sample rate of about 2.0 Lpm. The fibers on the filters were counted by the standard phase - contrast microscopy technique at 450 magnifica tion by the Texas Division Microscopy Laboratory. i ST0580544 * Time-Weighted Average (TWA) - The average exposure of asbestos fibers to employees during an eight hour work day. 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J= JJ . rH a Sj 0 s CQ 0) 0) 0 Q. *0 E,, U vfl - __ 09 CO JO m i ON 04 CM nJ 1^ CO CO ENVIRONMENTAL RESSARC. SAMPLE RECORD PILE NUMBER MAATER1IAL0- lie. cm C e, 11 EQUIPMENT NUMBER TYPE OP EOMPMENT M5A HUUUKSIVENTIL.ATIOM, (TO ____ D y- 6 y, I w g -M - & ) ~ Qi OATE S~.et^i'c-er U4s6*s'+bs1__D*mi~ : A-nzi SAMPLING METHOD trappino unuu Jf zJ? -_7 3 /<r . Fs/-** , $ IS to i / ( i Pt PLOW INDICATOR SETTINO SAMPLE PLOW RATE OerrSDE TEMP. INSIDE TEMP. v ___Py Nipt 5: Z -f/L V . e. 11 r -J__F4* n a % SAMPLE CONTAINER MO. NO. DISCRETION OP SAMPLE CS- I C*r__ -ft a <r~th e as __ is a * />*, j>(B~t AatfWI_L.__ <V dIS L~. O l WJ jp 4 l'IS, J +L* TIME START iNoaeff CONCENTRATION S!3r 4 a 30*.. .02 1 f/t-< tier VtH'ii tgii p.t - ^__ * an -v--It q__ &,________ *. 'anri ^* h/ .-at r <-__ ^ t id- -5- ^ S.T05805U9 ^ *7____ tfjP C K f K___ ^^i** ^ _<__ D IS ___ </ ___ /' <>__ itiU . eJ r fp > <71* o -to ffttil 9:or 3.3 H- f/gc. b t. 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EQUIPMENT NUMBER TYPE OP EQUIPMENT C e. l(v ies F,7-6 < v , PLOW INDICATOR SETTING SAMPLE PLOW RATE 0UT8DE TEMP. hi A hi **t Puooaf't ______3.________ 2: 2 -A 6-6--73 * < Fite-**- INSIDE TEMP. *F p U J *. 3 C !e. e. n ~ y f e- ka(d*.vs r < a. A-a <o Lt So c-t^r /~t___2 Q X~ fAn AaauS lOXXy. Put (AMPLE CONTAMCK NO. NO. DESCRIPTION OP (AMPLE TIME START IICRB<B<T CONCENTRATION LOL Ojn . r*7, a.Jti AuyiAj3i\*j ttsk^s-jaS i n ~ie> *.. rDuu~tp*.d ?-jr h o Q ^_____ Lt> g. la 4 /n Cl n;e>$ _io___ /ffluill . V-6 6 4/c.< i/uir 2+0 /& s') Vistbl-e ask **-6 0'S in___ a / ^ y La ^* j6r-et'a'4r a-M- I G1 Put* p 7^ bl3~ . z*3of S,M/. oA i:_____ A. jA trG I J/g dS____^ ^ * > >- i 6 * 3 ?___ A VU < t+ B.___5~g /> / A / ir,n a111x9' A9 9-fA< /3_ -? n____^ 1a ~ir t.u- .+ hus f. 1010 to //f/2 2o i-v<H . C 1o t 31m-------h *i d r / l____b^Ul^A //a ^ a -&!P I iCg. (' g-d__* 77 < *_ * jf < ^ ^ <7 T )_DtSt+ljO y C Q~6L * J^ f Alf J ,' VL y . Jo3 -Ao /.'g ? .ols //i -ox I 580551 f Ain 1 01 ^_ 14 i A Ale__* f >IJ. ship's, iv 7 tea ^--CCas** p l*7~*-___*6 c'*l. - -f--L*Ly' Au* t p e,a4L . d*. f Jlry/ttj 4* iit*'U ENVIRONMENTAL RESEARC SAMPLE RECORD RILE HUmGER A 10'LA k. |pocij \J2~11 EQUIPMENT NUM1ER TYPE OP EQUIPMENT %A-A_____ MSA REMARKS <VENTILATI0N. ETC) LOO. MO. 5<*V<c.*i D ia nUvatfu*, D*ct*/inG A-iOT.'l. SAMPLING METHOD ' TRAPPl .c,/lv)s*. FtILrev /U Miltipe~< Fil-b< U Pvi** O PLOV IMOICATOE SETTING SAMPLE PLOW RATE ____________ _______ OUTSOETEMP. |INSIDE TEMP- v1 % SAMPLE [CONTAINER I NO. I NO. I DESCRIPTION OP SAMPLE Fu p L_ 2 03 M / f\ __S3 g ...I ewv rspai^i^tf__ ^4___ * W/5. TIME START INCREMBfT CONCENTRATION fa A-loiorton-. Laj LalL. MoLAito*- a K wan *_____ ^____ ** " *< A_iji----- til ^____ /r to __at&'.S'ie 5 *s,lh JrU.Ji "C f IS_____ i** / L. -Lt3___ /Oft. krjc.kt.-t. T*ik*.^ a * l> , r-(r ~ c A %*-UL- UtL / ! 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Pv "'p 3o I DESCRIPTION OP SAMPLE f^rVnyvtnfi^i --__ C2 ^r -'iS'dfl'A) TIME START INCRBEEKT CONCENTRATION M/** 3j2_L. __ JL 2 ~A--______<S 7^0 c. 2CX -^2 /VV^T^ ' ao^uat^, GLuiAzAjeLs^.___- J^S-a- ^ ^4w rf_^=3ea- /# / ? //cc CSSOSSOIS I 0>LM7 PRIETO IE SLA. LA-S3 ? k3<5 ENVIRONMENTAL RESEARCH SAMPLE RECORD PILE NUMtER /4/<o- /_<*___ material PROCESS ..11 5~*l/ic 5 C SAMPLING MCTMOO r SLOG. NO. *ra it !*>__Utrm wv / ' 1* A >4-/n3 TRAPPING MEDIUM |DATE 1 ^-/V-'73 A fbesitj EQUIPMENT NUMSER TYPE OP EQUIPMENT v, <r, i MSA Mo*, 4.* REMARK^ (VENTILATION, ETC) CC'/tultSm. F i / "i < *- PLOV INOICATOR setting Pvv*p s s SAMPLE PLOV RATE 0UT80E TEMP. 1 INSIDE TEMP. p! % _2__ir all___Aunt a h____SLi__ * tdc....<* .__Ll Jc,.___a_" * a * * >4// <J*>> *s___op <.ti i____ SAMPLE CONTAINER HO. 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I O-tMn PCIRD II ACL IP-tl . c.fjv ENVIRONMENTAL RESEARCH SAMPLE RECORD PILE NUMSER A to- I <? L Ceil 5 "COS EQUIPMENT NUMSER TYPE OP EQUIPMENT Sc^vic g. 5__tit eJ*.____D\raw , SAMPLING MCTNOO C^ttoUs*. F- ; /-be * LDO.NO. A-102 3. PINO MEDIUM \ * 2 A* PLOW INDICATOR SETTING SAMPLE PLOW RATE OUT 80S TEMP. |0ATE 1 P-/g-73 lz> It INSIDE TEMP. ^. -r. *.j M 5 A__ Htm.l'to <T____ P</**eS _________ 2_______ _ RKS (VENTILATION. ETC) _ _A-IO 23 fl/c/g has all tl U il -fa u % a 41* eJ d* Ir: nf> V ENVIRONMENTAL RESEARC. SAMPLE RECORD FILE NUMiER A /P- f94 PROCESS 5ii'>'/'eej ^g~tLec)<. UNPLJNO METNOO D*-a ** t M <t RLDO. NO. A-102'2. TRAPPING MEDIUM Ai b-e.f-^0 r EQUIPMENT NUNRER TYPE OP EQUIPMENT e.llt/los+ 9r u h / /1 >p - PL01 INDICATOR SETTING SAMPLE PLOW RATE OUTSDE TEMP. MSA M . 4.*-^/fy t-g------------ bl. REMARKS (VENTILATION, ETC) PuK+ioi _____________ ______ ______ p OATE &-IO--13 F! ^ INSIDE TEMP. % SAMPLE CONTAINER NO. NO. Hlr m p S_C2.J 5~ . -M < J.d I-s.---- a_ DISCRETION OF SAMPLE LUicI.T A- (0 z.3. ^ ^ to 'S, W. _ + r a 1 v2i*t*r _S_L "E i at ' ~A~ < d u i<nft 1 to ej -JSL S E> -e.S ~6 a s) . T In : JT TIME START iNCRaeT CONCENTRATION . <9 7 E/c Ut\ c Lit g/ S 3--------a i? It tad e.__________________________________ g jsi g/ /g. l / ~6 d r Lf CS-6,2 M. i it 1 n A j- & a. t-6 AJ C (Tk) n r. * ds tr c. <r Tf.ee jlpld) ST0580 SJ\ cn -3 -//--.e ^__EL__(l* r*;dJlc.') gf-i<+ 6 ^L. ^ g n --*r___A - /<?2 3 ^ g fTJ____<r. { t> * rj. X/a /4 # 1/ 4 "-Ar ^2ja------h-o. rid fa J / /1*M\uJ mat* ^ diSmTlpygi/ lti ^ ^5 L-fj't a,S t rtE Q_____ l/^7? . Hr. Tel** wtfly.' .S a/l I r< tf~ I---7"#? k--g**f/*^7 betJ * ~t r, i*a*b Alra, -Ltvaik & <d ...da w <* p/ ~t -Ao*~* * A-^e. 1 Mini ptifTD is *..*. t-tt d v <*\ p t * 1 a s b ti j -- g-- I1.X /iTf/lgo ENVIRONMENTAL RESEARCH SAMPLE RECORD PILE NUMRER Am- 196 PROCESS Cell. Se>rvic.*.s Ca-theJ*. SAMPUMO METHOD LOG- MO. Sft___Pr-awin A - !Q-1 T. ! if- IG--73 PIM6 MEDIUM /4* J i> t. i ~t e 5 EQUIPMENT NUMitR TYPE OP EQUIPMENT - MS A S (VENTILATION. ETC) M By< i F w Pvi*ipi A. PLOW INDICATOR SETT1NO SAMPLE PLOV RATE " OUTSDE TEMP. INSIOE TEMP. V F STO580558 SAMPLE CONTAINCV NO. NO. Pu t+r p DESCRIPTION OP SAMPLE J Aa______ ^.-cn 4 4V *^ A_-JQ 7J2. TIME START INCRaefT CONCENTRATION 5^51 ..r..O -r ^ -3*9__ SL_id^ F asi ^ _zT vasL.--A. Lf - ' >* U14401 * D14 *.rJ Q-ro /ks___g ./L_ k en.k x. v j-jr *> d___? 2.^: /^>f___a_z_ hacker -L^ cs-61 F > in Mn rr ..______7!*gO /!<a r g t/*y / S & *.? ~6 i-ft -------V^nf ______Bu~t~h iy jr___ a S L -csFo S____g ^___f> //? ^ Fa rmn 4 j&J2_Uj >v*p;* j Aote^ju__^1*1 a-_*<? ^5*^ .___ Ml.v,___Talar __In A F a a k. war '-tufa 6 ^ . * hav -L* <?' ~ * * V _i_ 1L. c. c. T cF a r -*F ctra "6 x v k r'f ' I fi 9 1 pa/fcFs___l F__asA>t.*-- c Frcm A-fOlB _A -- / 0 J.Z ,__~T\AJ n__ ko a < Ygtl 12 , I ^0/i< <- ***;/ *> a n A f> t n % -2 Lx. f Bait__? GO Iks a F hooker A.-- 2. g _e>F keck+r ** f , Far, Xt/er aF xFF^ --mm .un mro n lli. i*-u It,3 n-- ENVIRONMENTAL RESEARCH SAMPLE RECORD FILE MUMfE IFEOCIU jRLOO. NO. I DATE A ID - IAL>___ LCjz/L Se*'vic.<s C.g-6 baJ *.___P'C,w, * \A-tO'Z-L ! SAMPLIMO METHOD rtAPPrPiIN6 MEDIUM A 9 b "60s S0U1PMEMT HUMEER TYPE OP EQUIPMENT MSA M a 1* . "h a v. I(fulos*. Ft /<>" PLOW INDICATOR SETTING SAMPLE PLOW RATE Pi/^lD Hr *?***"*- Pitt* OUTSIDE TEMP. i INSIDE TEMP. *P l REMARKS (VENTILATION. ETC.) SAMPLE OONTAINCK MO. MO. DESCRIPTION OP SAMPLE CS-10 SA. c v-M__ Mv. * -6 tjy g- ^ TCl fa i*'* * /e-s a S La. s -6 as l*srk U-tl Avif~ - dj v i ft. ' La <r ll* -kid. t It TIME START INCR5RENT CONCENTRATION A11 < z < c. SI 058055,9 -- MM &-1MTC PRIETO II ALL M>U ENVIRONMENTAL RESEARCH SAMPLE RECORD FILE NUMBER /4 /- MATERIAL /<? PROCESS /'.alt__5 /4 S l -c yb f EQUIPMENT NUMBER TYPE OP EQUIPMENT VC-U-------- N$A Aii>'6r'' PEMAJIKS (VENTILATION. ETC) BLOG. NO. __D/atilt pfltM.____/? ra *tt i* SAMPLING METHOD / ^ Trapping medium -d(uhs*- F> H<u 9j4 HfUtforn. OATE f-SY-73 Fill**- PLOW INDICATOR SETTING SAMPLE PLOW RATE OUTSIDE TEMP. INSIDE TEMP. PutAtoS % % SAMPLE CONTAINER MO. NO. Pti p DESCRIPTION OP SAMPLE CS--7I r & ft__/V) f I__P*^ ! I tin a A __ A.U V* p` % pi g.'t "F9 Kf*l t______ A/ 0_____jAtvty pn A aP t v t - y______e'C r Ayi ~t~____ "Pay if lap a r%t e tst lAr * p^/'k j ffiK ar____L'L- < ^ PL n Aa TIME START INCRBE&fT CONCENTRATION AT i h / O .n - C$- 72. -jT -mi___ e.<Ap <* a f_____ 6 (d-rZ,r V* fAda. T g A3 t'\r , by_______Sant .___gau A.'blons as CS-~11 / O i G-S-f/ci <- S70580S60 C%-11 CS=2 c<s-ir *T------Optra "61 r_____//srnry__M cttr-cs U .___/) ,jis*b e A g /6s____^ art** tes In jo tlt. A nfp % r i------/V-fl tf I s t A ! <. A us F . H a r <S k t .3__&___sntc k <.r Hr . B *i----- < F? ,--a f'^-ci_____alfl._yg<7 /~pp Av p i +$--piab Pp y-*_y_Au + tvtj AutA4j>;\M tj f~___ <T^Ell^f. A-- e. U! ~b <. w A P >< Vp *6 /mu AlAr, - A u r ! ut. c. AT A P`"S IS1 ix2_4* Jszsr ,0(o f/*Lt ISL tG H~l.fJj^C HD O-lATH PRIETO IB B.S.A. IB-U ft/- -*c- #S & OOW CHEMICAL. U.S.A. TEXAS OIVISION JOS NO. CHANGE NO. -- . - subject M 5A___ Em C* te bvm 4 t. J_______kjf_____ SHEET___L OF a. AUTH. NO. TILE NO. _____ __ BY &.L.S. HATE CHECKED 73 ft# "io m +'** ft *o 4 * t* o 10 s c * ___ 4 ft M __________ -Vi .ro ,*r 2, 2, O /.r /, 0 ST058056I DOW CHEMICAL. U.S.A. TEXAS OIVISION JOB NO. CHARGE NO.. S U BJ ECT ( MSA Pu ---- &JU___AueJuJbtL .SHEET_______ OH. by Ml? PATE S-XQ-73 .CHECKCO BY. 1 ^ <I 4- f/V *3 2/31 * , fC *,/7 6 .67 /# V 7 .13 /,*7 ST0580562 CHANGE NO.. SUBJECT DOW CHEMICAL. U.&A. z'* THAI DIVISION 'v- ^__Btttur* Art .SHEET. -OF AUTH. WQ._ FIL* NO. BY R LS DATE ;/l01 CHECKED -- 14/7 / *#//* . ,P^a /?# m.* P +* dt U t I/O ____ Af/***./ L* Pai 2..J- ^ _________________ _______.T 2. 6 .7 /. * V hot #7 ST0580563 CHASOC NO. SUBJECT Ii MSA DOW CHEMICAL U.S.A. TEXAS DIVISION .-- -- ------ &MM. _____ .Hr _ SHEET. OF 2. , AUTH. MO. flLC NO. BY T R. L. -T DATE _ 9/*o/r7S CHECKED BY. /ft /*** f L* P M - 2. A * .5V_______ > 6 .7*" /3 ? /,06 -fJ ST0580564 wf; -. - : j - <4t^A JOS MO. gMAMt MO SUBJECT e- 4**WW Cn&MICAb W..A. TEXAS OIVISION tiSA... " PILE NO. ___________________________ ________ ________ ________________________ BY___R.l. _^y ,tDATE fr-10-73 __________ SHEET / OF Z____________________________________________________ ___ CHECKED *v Vf't'kU___ i'n V R * 4 Jl -- q 9 - ,6 , tf4 ftilllf**- fit** L PM ________ /. 6 .7 AY Y I /.D ST0580565 vir . /I I 4t tU OOW CHEMICAL U.S.A. TEXAS OtVtStON JOl MO - CMAftOC wo. ------- SUBJECT ns#- Pvr.jB_______________ C.a (/_ _ _ _ L___ Burr*, tt SHEET. AISTM. WO- FILE NO. ___________ by RL.?. ___________ DATE ZlLi/ll .OECHICKED Wti: A * /<*// S' fi!**'b<.s - .rr 6 .7 0 L> P At /. * /. V- .*6 I. O ST0580566 .4 ;-s?4>s'>: 71*0 R. L. Silverthorne Safety and LP, B-101 THE DOW CHEMICAL COMPANY TEXAS DIVISION CENTRAL LABORATORY FREEPORT LM OATS THIS BT 8-28-73 1308-00020 CHARGE__________________________________ REPORT OF ANALYSIS Air Filters from Dow Industrial Service and Cell Services OUCRI mow_________________________________________________________________________________________________________________________________________________ DATE OF SAMPLE 8-9-73 - 8-16-73 Particles and fibers were counted on thirty-two air filters from areas which involved the use and handling of asbestos. Individual counts were made for particles greater than 2. 5 microns, fibers 5 microns to 10 microns, and fibers greater than 10 microns. The numbers reported are as total number of counts per filter square. ST0580567 LM dv .->* 5S5 JOB NO. 12 8CHARGE NO.,,_______ ____________________ SU BJ ECT_______ fl/R F/7t*rS:BY /es Silver SHEET AUTH. NO. OtfOAZZrb riLE NO. __________________________ ________ _DATe <9-/7- 73 l OF_______________________________________________ 3_.CHECKE Sample X>escript/oN No. of Partic/eS F/BSP'S F/gere v- 32RV fSLrsc^r S^. ~ /O^c > /O/u. 74/0 32/S / *~9'Z3 /square. (? So !0o #// 32/S -3 /o s / g-J-73 /S%uar& 43-0 12/S */& j 8-/0-73 /sqcsQI'Z 6 /OO <5.0 o 32/S /7 3 // 9 ^ . j8-l(*-73 /Square, *7(e 32 / S .*/& 6> 45 ; j8-t<*-73 /s^uar e. 9o DIS *t/<f 6 73 J8-/U-73 /&</* re. HO CS - S0 Ce <*4 JQ-/4-73 /sq/c/arg. 13.8. CS. - So-A (c 7/ J 8-14 - 73 /s<jUQT<L, M3. CS - SI J 8-M-73 y CS-5/4* V 8-14-73 /cs -S * 8-/4-73 /Z 3 2* 72 & /square t> 37 /sc^uar/z. 74 (p ss /s<jua r c. no / 5. Cz <37 / <3 8 a o o O O o o o 6 48 o o s to / -5 o o <3 3 /a 3 &> O CO 3 d = ) cn o\ oo a 5- 30 O O *3 & B JOB NO. auth. no. CHARGE NO.. V3Q& SUBJECT__________ Air ~ Fmters- -BY Zee Si JvcrShorn e. DATE 8-2.0- 73 SHEET OF__3_ .CHECKEO BY. S/?MPA X>SC/r/PT/0/Y cs - 33 / ff-H-7-3 /14. of ~F2lSj<'S , C5 - 4 v 5-/6 - 73 CS - S'S' ^ 8-/(-73 S - ^ Q-/(c-73 CS - 5*7> v 8-/0-73 jCS - S8 * 8-/0-73 /square. /Sgt/are /Sgt/ore /S2^orc. /struct re. u -* 6 ; / .cs - ? / 8-/o-73 3 CS-UO v 8-/0-73 /CS - U! v 8-/0-73 /CS-U1 ^ 8-ZO-73 /CS -us 8-/0-73 /sep/arz. /syuQrZ' /square. /s^uo. r cl. / / / / O O <* Parf/chs >3.fc //8 &36> /Si 8 A 5^, 9C 88 /%. 7 251 159 11/0 159 t 9/0 / ff-f /8SO /(* 8 SiOSlo 17 5 Si/oo //5 1380 F/BZR3 5/**~ ~~ /o^ a F/3R'S > /O/u, l SL O O o o / SL /o /So // /3 --4 s <2-g cn 3S~ <g \ /ZA 3 3(e o r * ' ' t -r*-r3r K.3 CHANCE NO. SUBJECT. /eg. /3oa. __Aj.R__ Elate Rs____________ Si/ver-t-har'inCL.________ :SHEET 3 OF FILE NO. BY Jf, DATE 0-&S-73 .CHECKED ar SfiMPAE X>ESCRlPT/oN +3 J CS -60 8-/0-73 No. of" 3 Partic/as >3.5/.c /S5. f 88 P/BERS 5/s. ~ /0 o p/BERE > /O/LC o O ,CS - 67 / /S*/ \ 8- /0 - 73 /S^e/^re 18/0 ,CS - 0 8 ^ 8-10 -73 cs-o? * 8-/0 -73 /sgi/ore /sge/are. 2 3 /O 5 990 M3 73. 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