Document mmrVGZbNzMQ7LqQNMRmjnMadJ

CHEMICALS INDUSTRIES INTEROFFICE / LAKE CHARLES TO P. S. Trew FROM M. G. Carver DATE September 7, 1982 SUBJECT Vent Sampling and Ambient Air Data Summary The VDC Plant Scrubber Vent has been characterized for chlorinated hydrocarbon emissions. The scrubber has a 0.5 ft diameter stack and a variable flow rate depending on operating conditions. In the past the vent was comprised of the DH still, VDC storage, VDC reactor, VDC still, day tanks, and HQMME tank vents. As of 3/19/82, the DH still vent and the TOC storage vent are being incinerated. The vents cannot, however, be incinerated during a No. 3 Incinerator outage or during abnormal conditions. Samples were taken under various operating conditions and minor changes were made between samples in an effort to reduce chlorinated hydrocarbon emissions below the 100 tpy limit. Attached is a series of evaluations with pertinent operating parameters. Operations has suggested that minor changes be made i,n an effort to reduce VDC emissions, such as moving the VDC reactor vent stream to the lower portion of the scrubber instead of the upper portion where it is currently feeding, thus allowing more effective removal of VDC from the vent. More sampling is planned if changes are made. In reference to a memo written August 30, 1982, by L. C. Davis, the memo stated that 69 ppm VDC was detected at Sheraton Chateau Charles and current conditions could not account for that high of a concentration. The figure reported, however, was 69 yg/m3 which is equivalent to 17.4 ppb. Attached is the data as reported. ce Attachments cc; H. J. Hoenes, Jr. C. P. LeBlanc M. Wood ./ E. J. Tullier/R. P. Byars E. F. Parsons/L. C. Davis Environmental File SL 043655 VDC Scrubber Vent SL 043656 Sample (Date/Time) Flow Rate C1HC cone. PMR* (ft3/min) (V2) lb/day tpy Operating Conditions VDCM prod EDC prod Vents Notes 7-7-82/9:45 a.m. 8.8 3.2 94.6 17.3 37 tpd 200 tpd Normal** No. 1 and No. 2 reactors reworking material 7-9-82/10:30 a.m. 6.6 55.5 1304 238 37 tpd 200 tpd Normal 7-13-82/2:00 p.m. 26.5 12.2 1177 214 49 tpd 0 Normal 7-15-82/2:00 p.m. 23.9 15.1 1281 234 49 tpd 0 Normal 8-11-82/9:00 a.m. 107.3 0.4 178 33 49 tpd 400 tpd Normal Condensors cleaned week of 8-2-82 8-17-82/9:20 a.m. 50.2 1.52 279 51 49 tpd 0 Normal 8-19-82/9:30 a.m. 113.5 20.3 8272 1510 49 tpd 0 Abnormal DH still vent to scrubber 8-23-72/10:00 a.m. 19.1 8.53 577 105 49 tpd 125 tpd Normal 8-30-82/10:00 a.m. 26.6 7.7 728 133 31 tpd 150 tpd Normal 8-30-82/1:45 p.m. 24.5 6.4 560 102 37 tpd 150 tpd Normal Water feed to Vent scrubber was doubled 9-1-82/9:00 a.m. 30.7 6.6 724 132 49 tpd 150 tpd Normal VDCM reactor pressure was raised thus reducing vent pressure *PMR = pollutant mass rate **vents, normal - DH still vent and VDC storage vent to incinerator >4 *3101-607-3 (Rev. 5/81) 4 PPG INDUSTRIES, INC. INDUSTRIAL CHEMICAL DIVISION LAKE CHARLES, LOUISIANA SAMPLE NO. Vg/M3 1 2 3 45 6 7 8 Chloroethene 1,1-Dichloroethene (VC) (VDC) 69 trans-1,2-Dichloroethene (trans) Chloroethane Dichloroine thane Tetrachloromethane (EC). (MeCl3). (ecu). Trichloromethane cis-1,2-Dichloroethene Trichloroethene (CHC13). (cis) (Trichlor) 1,1-Dichloroethane 1,1,1-Trichloroethane Tetrachloroethene (DCE) (MC) (Perchlor) - 1,2-Dichloroethane (EDC) 58 1,1,2-Trichloroethane (TCE) 1,1,1,2-Tetrachloroethane (Unsym) 1,1,2,2-Tetrachloroethane (Sym) SL 043657 Because the Areas system shares the display print r with the OHC reactor v nt GC 1 ** e*sy 1 confus alarm messages. The sample below shows the differences betwe n an OHC message and an Areas message: DATE 03/06/83 TIME GC STRM 02 09157 1 01 2.84 ALARM* TIME 10J12 ALARM* TIME 10J14 DATE 03/06 10.07 1 01 2.87 7.99 GC. <J> OHC *tr /V to An alarm occurs whenever a VC concentration greater than 5 ppm ts detected at one of the monitor points. Two alarms in a row at the same point will generate a "leak" message. Operator Responsibilities Whenever an Areas alarm is received. It should be Investigated promptly. Whatever Is discovered should be noted on the printer page (even if nothing was found). If the alarm Is real, action must be taken to correct the situation and eliminate the VC emission. This action should also be noted on the printer page. Remember that at low ppm levels, VC may not be visible or detectable by smell. If a "leak" message Is received after nothing was found on the Initial check, the area should be rechecked, using the HNU meter to find th leak source. Non-operations personnel should be cleared from the area, and the operator conducting the search should wear a Comfo II respirator or an air-pack. The Areas system must be kept functioning properly at all times. The air, nitrogen and hydrogen bottles must be checked routinely and replaced when the supply pressure is below 500 pslg. On rounds the VC operator should check the analyzer building and make sure all 11 rotameters are showing a purge. (Possibly one may be down If the GC is Injecting a sample.) SL 043658 As part of the L.O. checklist, the lead perator sh uld check the last Areas shift report for the thr e Items shown below: (P UteCAC StHFT -fine fS C04A&GT DATE 03/23/83 AOG* CONC. READINGS * ALARMS DATE 03/23/83 STREAM AVG. CONC, * READINGS * ALARMS * LEAKS STREAM AVG. CONC. * READINGS * ALARMS * LEAKS The shift time can Indicate a programming problem. The correct times are 06;i*5"lA:45, IA:45-22:45, and 22:45-06:45. The number of readings should be 19-22 at each point each shift, possibly less If some calibra tion work was done. The third item to be checked is the average con centration at each monitor point. Any average over 0.5 ppm should be investigated unless it was due to alarms checked and documented by previous shifts. One should also be suspicious if all the concentrations show .00 as it may be an indication of GC problems. (There is nearly always a background of 0.01 ppm at some point in the unit.) Report any problems to your supervisor on days and the shift engineer on back shifts. Repairs must be made without delay. SL 043659 A J AMBIENT AIR MONITORING SYSTEM S.O.P. The Areas ambient air monitoring system c nslsts f a gas chromatograph that analyzes the air sample from each monitoring point and a program control and display unit that controls the G. C. and prints the VC con centration detected at each point. A simple diagram Is shown below: There are II fixed points that are monitored: 1. N. W. of VC Dopp Kettles 2. S. E. of'Quench Tower 3* S. of Quench Liquor Pumps 4. N. W. of Furnace Feed Dryer 5. W. of VC-HC1 Still 6. N. W. of VC-HCl Still Reflux Tank 7. S. E. of VC Stripper Reflux Tank 8. S. W. of DCE Catalyst Pot 9* N. W. of DCE Reactor Pumps 10. Control Room Laboratory 11. Process Sump SL 043660 V-' j/J) JQ Co^La., l ft d > / nJ^. ^ c /y? -p^k?> ; U^& dCis&cj- /i&zd?- aJI,4+i *y -~~* ^&\pxs*TM-zV * 2, C -Tri 3 j^J"j -fo\jti/)!\M4$ -4t 4^ 'X$T/ 6trv$> isr ^JUU^t , f^J" f Jt> Qsjb*-djJ sjf O^jutrd) ^Ua^- ^ ijr^--^kr 'i/k. 'tA*- ^HjCphaj&S 6tvvV -<LS<MA4 *(4sls AjC<JL , SL 043661 jf, L/C A*J n<. , ! 1/ . /, Ui^r'C^n^sv (F-lt-t. p-C^p -rl t/(2- l C *^VV- ''^C- - C Cr t^i^- ,/t^/VJzJ/pt* ^-^^3 ' ^__sC-JL-CsC ''CisCCCdCL . ''C&~~ {yCj$S'-V*lr*~rT& rj-'" f ?trX? lX+TM~f /%*4 J c/ j. , C- ifa*. ^C$4c^j U/i&6 \ j ^ ^ -CCb -^>CCCt^_ ^ g-f Ct\S ArLxCrL&l^fcZ^ {Jljji Jcr>6t Lt'T'lrf ~Sj^jl-&t^iU ^LrU 'TlkjL^SA^ ~k '\!L<LjJli^e: H~t s^AAdjCCsyy^ AjjxJjl i^tA^t jiytM'dtJ i^JtCud ^ M^pua. am# *7^. (^, dMSJ^snaj^ Asrd ^M4(a ^C^Aa^JL t UC. aa<A 'ir*' SL 043662 'J. -J&Ae SIHt I 5SOUA lHi 3, \/*^-2 ^ JUl4l$u~^ ^uJ\. $boh of A-+~ td V I H 4juJ- > . a/ AUh^~~-^^Lddf-ffg >2^ AjuJ^,, Jhwo? ?7ve?{&u*^ '/Vtsr?LtO'l*$, &SI <L&^-rv &a f s, --^L&'X^-rX , ' | / ^JLyOiyur 7 -i_' yy-'*yt U' yc^A 2/*2*iA. < 1 y'*-- b ffayz--C ^yr%0^^ 'TT^fotSytM^ 7. CfLJf&do& 0^, 7>^cfev*f J4&h, SL 043663 -iuy\p /, P) jU<- g Pji^Ap^ 'p 3. ! A^yCti^ Py>^i^n^zc^_ . *f, -^^tPjP ip -ftjhrjy^. 1 / ^AJUuJjcfe, 3, ,Va*s*- 'Ur*-?z i?'1- %*c&t>i3*~-` *h **. I SL 043664 / &it* ' >$U2stUs\jL 2* a^, o&^_ ~ F/'f^-p^ j t'ffit j 2s,//<*-> y- -, '/>*--V ty )lLccd& sC&-*z*zMS{ts{ a^. ^ Aj**sie^ SP O^tpc^n*^ JPL&syy_, $9 > '^$Ls /flut&U* MmJL 'T-fr' snsv-ts\&7rdldf$ Ath*^e_ Xji~" /^'-+- V, '0 ~?. fc<Zs7s~ /l^-^z_ *? &c,zse4^-- -^t-n | ^sUt^jL^fnj* sd4+*^4^^g_ ^ CJUtA ^JL; J^r 9- SL 043665 /. c /'**'&* 'lfi*r % tit &/\J ^tds ^ l/6j6r I ^ J /l/Z&j^ (C/Tif ^f&/ *&* s&4*%**^ ffUt^'i/*~ t/e~J~ ^&du- -^jLs\&<2-^AA^- Js& /6bS<Z+S^- Hi --> jh&teh,* W, nArot -fcf *C*& 7 z^c/ Cr y%r Asi'i^P 'ZAzA^ ^!t - -* 3r -^^p & <&/L /* &, . (/e-jCr 043666