Document e5GXOY8n7qJB54mZoGb23jJn4

conoco Interoffice Communication to G. G. Draper From Tom Roche Date November 21, 1974 subject Revision to Vent System at VCM Loading Dock. Design No. 15-700-1174-TPR Attached is the design for a piping modification to the vent system at the VCM loading dock. This design is being issued as final unless further comments are received. Venting from the ship increases the back pressure on the vacuum eductors on the dock and on the hydroquinone addition system. This reduces the eductor efficiency to the point where adequate vacuum can not be produced. Eductor design information indicates a 2 psig back pressure reduces the amount of vacuum produced by 30%. As a result it becomes necessary to stop the venting from the ship during hold sampling and hydroquinoi addition so that these eductors will function properly. Consequently, ship loading is stopped or reduced during hydroquinone addition and hold sampling. This design proposes to route the discharge lines from the two eductors directly to the knock-out pot located prior to the vent stack. This will reduce the back pressure effect now encountered when ship venting is in progress. Currently the discharge lines from the eductors combine with the ship vent line immediately after the vent recovery system. Back pressure as a result of the pressure drop in the 3" combined vent line to the stack will be avoided by piping the eductor discharge gases to the knock-out pot separately. Approximately 150 ft. of 2" pipe will be needed. A 2" -flange connection will be needed on the K0 pot to connect the new line. It should be located at approximately the same elevation as the present vent line connection to the K0 pot. If there are any suggestions or revisions to this design please return them immediately to Douglas Michels. T. Roche Approved bw BY CHKD. BY. DATE. DATE. SUBJECT SHEET NO.. JOB NO_____ OF Ngt , Nt*J MJlLL $ RF.tiUiril? Ar i*iLr ri> r>/& K.&. ^i/r. Tag U'CAr,^ a/s r/v/f M0Z2LS. IS. GZ/rfCtU- <3r " He Mr- USAir J fffr 6* r^ffi /<. Qt p> vT't A/A- *r VVC Q00010289 Tie'Ll/'.' I /\Z\/iSi0*s J O lJejr SrSTr7 r/7? H-2U-1H re#? 9e^ &d&- dZ^ -- <SZ*<**~ ^mit^ a. du^C; ^s&tytdZ /d--- - " -- d*yf ^P, - jtZu^dZ- ^ZLcy^zZ^/ y*- (2^^c*^^<Zd<LP j^^***^ k/""C-'**-^/ 3 ^S\&ds dZ2dp yd^zO *-- -rfQ.yi*4--dc~<*sde^d Jds (2r d . &' //. dJ^c^Z >--^i_-t^c--**^ CBS OZZeZ* (^O^zdp^y < c*-" I^fet-C^v (J2^pPA^ /p 'Z>d- ii^J5^7^Q^^,*<2_-^ C^er-rryp^sc r &oJ> 2P~^c p/y] -zasc 70 ^ ^O <0?dLy^ 2&U-U*zJ jZ#^--g22 c jZ/^0<^<2z^ztX^ "^2^- _ %J /^j y Cts-odS VVC 000010290 _Z ZcJt y?i K ^IuJ*j $ L$. ^C2^2-c^x^ ^0-^ + /'V^ &~>^ /2 <=sQ->^3^&^ $1, iOIaAj 'iMtts*** us-<yf ^*+~& r* $x o, 0 rfr^ /&*y --rf $ r...___ !kj.-^>v^y<rv~ .. fib.--"& ^A-et^ $- -*' VVC 000010291 VVC 000010292 ' A' UNA pLt' n i ///0m_ - tfC_ V*\^ 491 /fayVefa^ ar+utju. Current Report /o-s - '?<!-_____________ l. Vinyl Chloride where regular monitoring program shows excursion levels may exceed 25 ppm. FINAL OSHA VC RULE WILL PERMIT Give workers and their representatives a "reasonable 25 PPM EXPOSURE WITHOUT RESPIRATORS opportunity" to observe monitoring and measuring. Until January l, 1976. employees in polymerization plants ex Provide protective garments and respiratory protec posed to concentrations of vinyl chloride less than 25 parts per tion to workers in hazardous situations, such as cleaning million may decline to wear respirators, according to the final operations in PVC vessels. VC standard adopted by the Occupational Safety and Health Ad Prepare plans for emergency situations such as acciden ministration. tal release at high levels. Assistant Labor Secretary John H. Slender told the Train workers on topics such as the nature of the hazard, National Safety Congress on October 1 that the permanent protective measures, etc. standard would be issued on October 4. Exposure to VC was Conduct proper medical surveillance. Medical programs limited to 50 ppm under an emergency temporary standard must include complete initialexaminations. Subsequentones issued by OSHA (Current Report, April 11, p. 1411). The per will be required every six months for workers who have manent standard proposed by OSHA would have prescribed a worked with PVC for 10 or more years. "no detectable level" (Current Report, May 9. p. 1539). Require signs or labels at entrances to regulated areas, Tne adopted standard specifies that no employee may be hazardous operations, containers of PVC resin waste, PVC exposed to vinyl chloride at concentrations greater than one containers, and VCM containers. ppm over any eight-hour period or to more than five ppm for Require maintenance of medical records and rosters of a 15-minute period. This exposure limit can be accomplished authorized workers to be kept for specified lime limits or through use of personal protective equipment instead of con sent to the National Institute for Occupational Safety and trol of the workplace. Health if an employer goes out of busimess before expiration However, according to OSHA. "While exposures in excess of the retention period. of the permissible level do constitute a hazard, we believe Submit reports to the nearest OSHA area director not that it is necessary to mitigate some of the problems later than one month after establishing a "regulated area, associated with implementing a program of respiratory and within 24 hours of any emergency exposure. protection while employees are being fitted and trained in There are 36 polyvinyl chloride plants employing 5.600 respirator use, and while other adjustments which may be workers, 14 monomer plants, employing 940 workers, and required are implemented." 7,500 fabrication plants employing 350.000 workers, accor The standard continues the current 50 ppm level until ding to Stender. <x. December 31, 1974, to assist employers in meeting the new levels. Three-Phase Plan Federal Agencies The permanent standard will operate as a three-phase progression between October 4, 1974, and January 1, 1976. Reductions of exposures to these levels will be made through feasible engineering and work practice controls. Where the measures will not reduce levels enough, the standard will permit reductions to the lowest practicable level with employee respiratory protection to meet the one ppm and five ppm limits. Beginning January 1, 1976, the wearing of respirators will be mandatory for workers exposed to the one and five ppm limits. Until the January date, the wearing of respirators is discretionary for exposures under 25 ppm. Slender told a news conference at the congress that the delay in the effective date for mandatory use of respirators for exposure above one ppm is due to the shortage of equip ment and the need for approval of new equipment. Standard Provisions Provisions of the new standard require that employers must: Set up areas where concentrations of VC exceed the one and five ppm limits with access limited to "authorized workers." Forbid contact by workers with VCM in liquid form. Initiate monitoring and measuring programs to learn whether exposure levels exceed 0.5 ppm. Require new measurements for any change that may alter exposure levels. * Require a continuous monitoring and alarm system PRESIDENT FORD SIGNS NSW EXECUTIVE ORDER ON FEDERAL WORKER SAFETY -- HEALTH A revised Executive Order on federal-worker safety and health was signed by President Ford on September 28. Executive Order 11807, "Occupational Safety and Health Programs for Federal Employees." was issued to strengthen the Government's commitment to provide "exemplary" working conditions for federal workers. It supersedes Executive Order 11612 issued in 1971. Secretary' of Labor Peter J. Brennan announced the sign ing of the NEW Executive Order at a speech given to the National Safety Congress' Federal Safety Conference on September 30 in Chicago, 111. "The new Executive Order has teeth in it. And it is clearcut in its division cf responsibilities." Brennan said. Worker Guidelines Brennan noted that issuance of the Executive Order is lied closely to guidelines for federal worker safety and health. The proposed guidelines originally appeared in the Federal Register last September (.Current Report, October 4, p. 581). Since issuance, the guidelines were revised to bring them into agreement with the new Executive Order. Brennan said that they will be issued soon and that ' agency heads will be required to observe these and any future guidelines issued by the Labor Department." According to Brennan, the guidelines cover five areas: (1) recording and reporting injuries, illnesses, and ncci- Copyrighl ><-: 1974 by Th- Bu ffOu of Noliongl Affairs. Inc. VWC 000010293