Document Ev23KM9yyqxNDERkZYbkk6Vw4

Charles Hessi^__ P. M. Zakriski mi ussbl I June 3, 1974 Vinyl Chloride Personnel Monitor Analyses The vinyl chloride personnel monitors submitted on May 29 have been analyzed. The results of that analysis are presented below. Sample 1,, 2 3 4 5 6 7 8 9 10 Operator Duty Utility technician Utility technician Lead technician Lead technician Pearl technician Roving technician Utility technician Pearl dryer technician Paste Bagger Mixing technician mg vinyl chloride ^pm vinyl 12. 1 23. 5 12. 8 0.6 6. 7 4. 1 2. 5 0. 6 0. 5 0.4 22.4 46. 2 26. 8 1. 1 11.9 7. 0 4. 2 0. 9 0. 8 0. 6 *Please note that the ppm value reported is calculated on the basis of the volume of air sampled for a specific sampling period and it is not a TWA value for 8 hours. cad cc: J^McCool &E. B. Katzenmeyer, L. B. C r id e r G- Schaaf A. R. Webber Jr. PAUL M. ZAKRISKI & ** *2 H BFG46689 la tfX y Q ^ O i./rjC ?n/ *73 fv n /o s y 3 d npiojlsoI^ O ^ c/ 'O'J' r\ SUBJfCT MONTHLY CODE "0M PROGRESS REPORT TIP, 2 OVA SURVEY During the latter part of February, technician trainees were trained and assigned to conduct the OVA surveys on a continuous basis. This enabled the technical people previously assigned to this task to resume their normal responsibilities. In addition to normal survey work, the OVA operators are testing all vessels prior to entry, PEARL/PASTfTpOLY BUILDING 1. The majority of high readings reported during the past month in this area were due to extensive maintenance on the recovery system. It is recommended that ventilation be switched to emergency operation to provide maximum air movement during maintenance of this nature. 2. Plugged lines caused excessive pressure buildup in the paste homogenizers on several occasions, resulting in relief valve discharge into a floor trench. The problem has been corrected; however, consideration is being given to piping the relief valve discharge to the outside. 3. A coupling has been installed on one HRC unit for attachment of an exhaust hose. A better means of attaching the hose to this coupling is necessary before we can determine if this modification eliminates the occasional high VC1 levels experienced during KRCing. MASS BUILDINO 1. A thirtv-foot extension was added to the exhaust from the vacuum jets, eli minating contamination of building inlet air. 2. A similar extension will be added to th6 vent condenser stack on the recoverv sy3t em. 3. Extensive maintenance on valves, lines, and equipment has dramatically re duced VC1 exposure within the process area. U, The mass screening and grinding general area was sampled on 23 occasions. Maximum reading--Tppm. Average reading--Uppm. 5. Rotex screeners were sampled on 80 occasions. Two readings greater than 50ppm were obtained with a maximum of TOppra and an average of llppm. 6. Mass grinder was sampled on 90 occasions. One reading greater than 50T>pm was obtained vrith a maximum of 60ppm and an average of 6ppn. T0089T9Z HfV. M >0 IN U.S A BP046693 MONTHLY CODE "0" PROGRESS REPORT - NO. 2 (CONT.) Page 2 DRYER BUILDING The modifications made in this building, reported last month, have reduced VC1 levels to an average of less than 10 ppm. WAREHOUSE BAGGING AREA The bagging area vas monitored on k2 occasions with a high reading of 19 ppn and an average of 6 ppn. AIR >!ASK SUPPLY AIR Thirty-six readings were taken on supply air to breathing masks. High--13 ppm. Average--6 ppm. TANK FARM VC1 exposure in the tank farm area was monitored on a daily basis for approximately one week. Several leaks in the circulating pump area were discovered and are being corrected. An air mask is presently required during connection and disconnecting VC1 cars. An air line station has been installed in the pump area to provide breathing air during abnormal conditions. More data will be collected in this area to determine if any procedure and equip ment modifications are necessary. RESIDUAL M0N0r<ER IN RESIN PRODUCTS Due to excessive production downtime in all areas, some of the samples requested during the past few weeks have been delayed. All areas are back in full production and we should he able to resume our sche duled product sampling. A new chromatograph and related equipment has been ordered with a delivery date of mid-April. This equipment was specified by E. G. DeCapita to provide equipment uniformity at all plants. BENDIX ANALYZER Although we have no recent estimate on delivery date of the Bendix analyzers, preparations are being made for their installations. MW DPOK BFG46694 J. w. Goetsch J. A. Klupar w. A. Reed A. R. Webber D. T. Wright A. w. Clements - R. C. Nattkemper LB C. B. Coooer -- D. E. Griffin HE E. W. Harrington CL w. C. Holbrook CL P. H. Lawrence - .J. W./Robben LV E. E. Katzenraeyer AKV J. L. Nelson CL R. N. Rylands - M . D. Rider AL SKj . G. Schvaegerle ^alternate CL CL B. M * * G. Zvicker CL 26168002 Olenn Schaftf Dennis O'Keefe MONTHLY CODE "0" PR< I 2/1U/7** FES a 5 OVA. SURVEY Beginning 1/7/74, OVA readings were taken on an alternating shift basis with two to four rounds made per shift. The reason for the alternating shift schedule was to permit recharging of the battery on the off shift. In late January an addi tional OVA and snare battery were received which has enabled us to expand survey time to every shift in the problem areas, such as the mass resin building. Specific pjre^jlems and corrective action are listed below? Pearl/Paste Polv Building; 1. High readings obtained when the poly manhead is opened, prior to transfer, have been reduced to low levels by stationing evacuation hose at manhead lip when manhead is opened. After opening, the hose is dropped inside. 2. We occasionally see high readings (l00-300prm) in the vicinitv o* pearl polys being HRC'd due to the poor seal between the HRC unit and the manhead. A work order has been written to install a coupling on the HRC unit for attaching an evacuation hose to determine if this reduces emissions. 3. VC1 laden HRC water Presently drains into floor trenches^resulting in high readings at times Data are being collected to determine the possibility of HRCing directly into blend tanks without contaminating slurrv. 4. An EA has been approved to steam sparge charges before transfer. It is hoped that this will reduce significantly, the amount of VC1 in the slurrv. One charge of 1Q3EP v-7^ was rianuallv steam sparged and OVA readings were taken from the evacuation hose. Results indicate that while steam sparging may reduce residual VC1 in slurry, the vapor above the hotter slurr,r con tains higher concentrations of monomer which must be recovered or vented. 5. Drain water from seal water strippers, previously drained to open **1oop trench, is now drained outside. 6. Other sources due to isolated eouioment leaks can onlv be dealt with when detected. Except for these instances, poly building atmosphere is ver,r good. Mass Building 1. The dry nature of the mass process has created a tendency for HC1 to build up in the system, resulting in corrosion lines and enuioment. An am- noniator has been installed to neutralize the HC1 in the system, replacing an ineffective caustic scrubber. It will be a while before we see the effects of this change. 26169001 BFG46695 ) MONTHLY CODE "O'1 PROGRESS gupopT NO, 1 (UOUm. ) Page 2 2. Leaking ball valves and Harter blinds are a snoradic source of leaks in this area. Maintenance procedures are being reviewed with extreme emohasis on leak-free operation. 3. To improve building ventilation, summer ventilation fans have been turned on and an additional fan is being installed. This additional fan is to accomo date building expansion now in nrogress. U. Comnressor leaks hone to be corrected when a ma.lor overhaul can be scheduled. Until then, the nitrogen pressure on the shaft seal has been increased. 5. Changes in the prepoly recovery procedure are being initiated to reduce vqi levels within this vessel. Drver Building The following modifications in the dryer building have eliminated high V01 levels in this area. 1. A cover was installed on the Syntron souirrel cage, creating excellent suction of all vapors from centrifuge wet cake into first stage of drver. 2. A temporary canvas cover was installed around chute from centrifuge to Syntron. A permanent cover is being fabricated. 3. An exhaust blower was placed in the centrifuge effluent pit, which exhausts outside. U. The naste concentrator condensate has been repiped from a floor trench to the centrifuge effluent pit. 5. The Rotex screeners are a source of VCl if the covers are not kept in place. 3FNT)TX ANALYZERS 1, Attended workshop in Avon Lake on 1/29 and 1/30, 2, All materials needed for installation and startun have been ordered. 3, Pedricktovn has requested an additional 6-noint sampling system based noon ini tial analysis of OVA data. Further analysis indicates a need for more than six points per building to achieve a statistical assurance of 9&% or better. RESIDUAL UQTOTER IN RESIN 1. We have begun weekly sannling of each product type for residual monomer analvsis. 2. Additional in-process sampling is being conducted to trace monomer loss during handling. 3. An aunreciable increase in these analvses will renuire additional DC equipment, Ed DeCapita will advise us to provide company uniformity. BFG46696 26169002 MONTHLY CODE "0" PROGRESS REPORT NO. 1 (COHT.) Page 3 MISCELLANEOUS 1. Surveys in storage and bagging areas indicate no problems, 2. Vat>or space in bulk truck, sampled orior to shipment, resulted in reading of 150ppm. Samples from vanor space of rail car filled two days earlier ranged from 150-l80ppm, 3. One inquiry has been made to Precision Oas Products on the shelf life of VC1in-air standards. An estimate;by their chenistjVas a maximum of three months. Experimental data will require a Purchase Order, Our purchasing department is working with Cleveland on this, 4. Safety Procedure SA-30 has been issued for use of cartridge tyre resriratots in area or operations where VC1 levels are greater than 50ppra but less than lOnOrrm. DPOK n.1 2/14/74 DISTRIBUTION: J. W. Goetsch T, A, Klupar W, A, Peed A, R. Webber D. T. Wright A. W, Clements - R. C, Nattkemner LB C, B, Cooner - !). E. Griffin HE E, W. Harrington CL W. C. Holbrook CL \JP. H, Lawrence - .T, W, /Robben LV E. B, Katzenmever AfC J. L, Nelson CL R. N. Rvlands - M. D, Rider AL E. 0. Schvaegerle CL H. Waltemate CL B, M, 0. Zvicker CL 26169003 &FG46697