Document km82dkN14JbzxeX1r7maeOoKq

E May 19,1994 Plant Superintendents Safety Superintendents Safety Coordinators BRIAN DONATTO SAFETY COORDINATOR blog. 4601 Dow U.S.A The Dow Chemical Company PQ Bo, "50 PlaQuemme. Louisiana 70765 0150 Use of Red Tags for Minor Servicing Activities Background Applicable Activities Procedures to Ensure Safety Both OSHA and Dow have written in an exception to their Lockout/Tagout Standards for: "minor servicing activities which take place during normal operation... if the activity is routine, repetitive, and integral to the use of the equipment for production." In these cases, the equipment need not be locked or tagged as long as alternative procedures are applied to ensure a safe operation. Examples of the types of activities that this exception might be applied to include: shutting down a bagging line or conveyor to unplug it changing filter elements etc. If you wish to apply this exception to an operation within your plant, the following two items are required: 1. A written Safe Operating Procedure 2. An alternative measure to prevent inadvertent activation of the device by the worker or others Samples of the alternative measures mentioned in item 2 include interlocks, key-locked switches, push buttons, etc. DO A 034060 CONFIDENTIAL Red Tag as Alternative Measure Approved Variance Audit Requirement Questions Some plants have activities to which the above exception applies but for which there is either no alternative measure such as the ones mentioned above, or the plant would like to have the additional protection and communication provided by the hanging of a red tag on the interlock or other device. If this is done however without completing an associated red tag master and location listing and without a job representative's review, there is not strict adherence to USA-3. A variance to USA-3 has been approved which would allow the use of a red tag as either the alternative measure required above or in addition to the alternative measure. The use of the tag must be written in to the job procedure and a red tag master, location listing, and review by job representative are not required. This applies only to those minor servicing activities which: 1. Have a written Safe Operating Procedure 2. Are short in duration, of low risk, and require action from only one person 3. Are constantly attended by the person hanging the tag The tag may be hung by either Dow or Contractor personnel. Supervision should ensure compliance with this procedure through periodic job site audits. In addition, this type of procedure is one which should be certified annually as part of our compliance with OSHA's Process Safety Management (PSM) regulation. Any questions concerning the above information should be referred to your safety superintendent for clarification. LAD Safety Department ( CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 6/l/94:jpw DOW CONFIDENTIAL DO A 03406? CONFIDENTIAL Training & Development Procedures Chlorinated Methanes CMP PROCEDURE C-1540 Bottoms Filter Recharge PROCEDURE # 460209 PURPOSE To safely recharge the C-1540 bottoms cuno filter. SCOPE RELATED PROCEDURES DEFINITIONS This procedure covers the safe methods and practices needed to recharge the C-1540 bottoms filter. None. None. SAFETY CONCERNS & EQUIPMENT ENVIRONMENTAL CONCERNS This is a potentially hazardous job. The washing of the filter elements so that they may be removed must be done wearing proper safety equipment. Line opening: Monogoggles Filter washing: paper suit, rubber gloves Care must be taken to ensure all wash water is properly contained. SPECIAL CONCERNS None. .Revision #2. Dow Confidential Revision Date-6/1/94 This procedure is valid for 24 hours from the date viewed, June 1,1994 10:56 AM DO A 03406.3 OONFTOFNTT At C-1540 BOTTOMS FILTER RECHARGE PROCEDURE Isolating, washing, and recharging C-1540 Cuno Step Action 1 Monitor the inlet and outlet pressures on the filter routinely. When the differential between the two reaches 20-25 PSI, recharge the elements. 2 Isolate the inlet from the pump and the outlet to the bottom of the south reboiler. 3 Connect nitrogen to the inlet line and blow all liquid possible into the reboiler through the outlet line. 4 Purge filter to the Dry Vent Header to remove more residual liquid and vapors. Depressure to the THROX. 5 Wearing monogoggles depressure remaining N2 to atmosphere. Red tag the inlet and outlet block valves of the filter as per the US area red tag master standard. 6 Disconnect flanges or unions on inlet and outlet of filler. Using a forklift, move the entire filter skid to the Decontamination Area. 7 Remove the head from the vessel, wearing proper safety equipment if an impact wrench is used. Also, a Scott-O-Vista and a paper suit, rubber gloves are required while the head is being pulled. 8 If the elements can he removed by hand at this point, do so using the same protective equipment as above. Place the used elements in a 45 gallon Dak-Pak and label the drum "Filter Elements" with waste type 02564. Wash the filter, steam, and blow dry with air or nitrogen. 9 Ifthel elements cannot be readily removed at this point, the vessel will need to be washed with afire hose. Consider turning the filter head off to one side, securing it with two bolts, and using the fork lift and choker to turn the filter on its side. Make sure no personnel are in the immediate area and standfar enough awayfrom the filter so none of the spray reaches you. Once you have washed the filter enough to remove the elements, do so. Then continue washing until the filter is clean, steam it, and dry it by blowing it with air or nitrogen 10 Obtain 18 new filter elements for the recharge. The current filters being used are Dow Code number 6501918. They are 10 micro cotton wound elements with a 316 SS core with an open ended on one end, extended core on the other. They are stocked at Cellulose and are coded under C-1540 for automatic reorder. (Filterite part number C10AW30S-EC1S) Install the new elements in the vessel. 11 Reinstall the head, and reinstall the filter in the process. Pressure check all breaks with nitrogen. Clear all masters once filter pressure checks good. Notify board man and then slowly line up the process to put back on line. KK 2/94 C1540FLTR. DOC D0 A 034064 c CONFJDFNT jai. CHLORINATED METHANE PRODUCTS COMMUNIQUE' Jyiew& Initial DATE: g/ 27_,199 jf FROM: 3' SUBJECT: AJ$PS TTtxJsu^e* This form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Place a check mark by the group(s) needing to review. EMPLOYEE: Please initial once review is complete. 1 GROUP Staff PERSONS NEEDING TO REVIEW Hanev pt'Vil Miles ^/Bourne ^^"^Kellev ,-l^lniix 1 ^Patterson Supervisors JS SOS's Witt Clebert -- Cook.J. /^^Dugas /i /It.Michel Rizzo Sauls I i \ trice Wjitmann f^f Young ----------------- imm.r----------- I^EST-------- ------------------------------------------------------------------------- Breaux J212. Bcieler Bickham A Cook, F. Davis gj^-*Onuit OS's ^ Gravouilla Jackson Millendcr "^v|^*Annand ^ PvVBishoD ^^yySBourE Cavalier < L/Cj/flanison Jack f Loonev ^frOrietreiean 1 - ^/6oucel iy/^Ekev Wolfe j. ^^^Donatto [1 Grace Day Jhnson ^^7 Simonson Vavasseur Operators y Instruments Boure Burris . * Eunice ... . Shanklin ^ 1 Rev. 2/4/94:jp\v DO A 034065 CONFTDFNT I Al. DOW CONFIDENTIAL ToT CMFFersonnel----- From: Steve Ledoux Subject: NSPS Training 372779* On May 26,1994 Brandon Choate completed a program which will require a first pass temperature permissive to bum dry vents and D-1525 vents. This program will also alarm whenever the NSPS temperature limit on the first pass temperature is near the low limit The new programming does not trip the vents. It will be the responsibility of the operator to take steps to increase the first pass temperature or send the vents to Vinyl II. We have three temperature limits on the first pass temperature. The correct limit depends on whether we are burning only our dry vents or D-1525 vents with vent recovery operating, burning Vinyl ITs vents, or burning dry vents or D-1525 vents with vent recovery off. This sounds complicated, but it really isn't* Condition Burning our dry vent or D-1525 with vent recovery working Burning Vinyl D's vents Burning dry vents or D-1525 with vent recovery bypassed or down Limit 665 C 675 C 715 C The program information on NSPS is found on the Picsvax under the flowsheet labeled 'D-750 D-751'. Click on the 'NSPS* box once the flowsheet is called up. The limit is decided by which of the three conditions is occurring. The condition with the 'ON' indication to the left is the current limit. When reviewing the screen ensure the proper condition is indicated. The next column shows a three hour average which the NSPS temperature we need to maintain over the limit. The last column indicates the current reading from the TDC of the first pass temperature. The average is a three hour average using fifteen minute snapshots of the instantaneous temperature. The instantaneous temperature doesn't alarm the limit, only the three hour average does. When the Throx shuts down, the three hour average freezes from the last time the Throx was running. Once the boiler is started, the first pass temperature begins averaging into the last frozen average. This reduce the time required to bring the average over the limit. The instantaneous first pass temperature is used as a permissive to bum dry vents and D-1525 to minimize the time to bum vents after a shutdown. When the alarm comes true, a message is given on the Picsvax to guide you to take action. Don't bum dry vents or D-1525 if the low temperature alarm is active. If the temperature average is below 665C, divert dry vents to Vinyl II as soon as possible. If we are burning Vinyl's vents and we can't keep the temperature above 675 C, call Vinyl II and let them know the situation. If we continue to bum Vinyl's vents under those conditions, Vinyl D will be out of compliance. I have communicated with Vinyl so they can get the same temperature points in their control room so they can monitor the situation as well. Thanks, 00 A 034066 ( CONFTDFNTTAI. CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 2/4/94 :jpw, DOW CONFIDENTIAL aUi!!' Ur., K L <r'uH!.Y) DONA 110 D L' (BRIAN) (| j /; 3 /i <. 3 i ) ( P L. A N M I" f Ci'll rA-'.nt'. u-rurM V5 a;43 7i 95oi. ARNi>C'2HKGATL.ousi''ivC'2; f; j4 i o i r-; 1i q r - DI,| . LAPNiu: : t 'BEND "GLLNnA I OWMSII ND , < 5 04)3 8 9 - 1 59 4" i 7-MAY-1 994 k i" 34 56*41 To: QbSL'P i "u!.' ,i : Injury j + LG'I I on 5'1'T D ,..l; Den*' cip o r -i 1 r Waio w li o 11 o it ij i du i? jo p t i r. - r o tj iti t i t'i iti r o r < t i >:; : r ; <: n ' a =; i -=- 1 ing I; owe I L in removing blurry : 7 ; 11 ,i o vi f Li o 3"v a o u u it. 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L': This i yi c i J e.n h r^siolPed in ah recorJ^lle 1' K) \ j wr^, /A/i is So^epkmj weed h le. jcur^o- Op LriJ Urf-Pch nt-L only tsiik 0oure!I lul aJsO (J wy urC \ any K>*J t-f retried eyMiyiMenl ^D>r ^ job , RGi:,P.IVF..I) F.'47i4 U4 04(,3l TO DONAT TO 5/17/94 5/17/94 1127 11:23 U404031 000 DO A 03406B CONFIDFNTIAL CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 2/4/94:jp\v DOW CONFIDENTIA1 OO A 0340A9 confidential The fallowing list comprises the added logic to the distillation area which will be incorporated into the n xt upload scheduled for Tuesday* Hay the 24th. Please look over the list. 1. Logic has been written which will detect upsets in D-1450 *s level *tjch as a heavy rainstorm. The logic is contained in WARN1119) - 1453 UPSET - DISABLE D-1450 UC -. The intent is to catch a level deviation from the normal average level* alarm aid set C-15Q0*s feed flow setpoint at an average feed flow from over the last ten minutes. The logic used to trigger the alarm is built with a latch set to go false given the level is back at some deviation from the original level before th upset. Once the latch clears* the operator wilt be able to clear the alarm by setting DM(106) true. WARNING: clearing the alarm with the DH() AUTOMATICALLY puts 0-1450 back on level control at whatever level is present. THE LEVEL SETPOINT AK(801> SHOULD BE REALIGNED TO THE ACTUAL BEFORE SETTING DM<106> TRUE. 2. The old RE01119) - C-1500 HIGH/LOW OVERHEAD TEMPERATURE alarm will be deleted to make room for the above alarm. 3. T- 15 00*s LIC has been deleted since the controller is never used and because of potential flow problems with the P-lSlO's. 4. A new flow AK() setpoint has been written for the P-150 0*s whenever R-130) trips and product is routed to T-1500. Also* another AKC) was added to engage whenever the operator reouests to start one of the pumps. 5. C- 1530* C-1540 and C-1550 will now have low tray temperature alarms associated with the existing high tray temperature alarms. 6. A low steam flow limit is built to be active when C-1540 enters the n STEP(304 ). The limit will be engaged until the steam flow climbs above e limit and then tries to fall less than. 7. Code has been added which will remove D-1450 from LIC given a network commun ic at ion faliure between System B and D. The flow setpoint will' default to the last flow measurement until communications has been reestablished. Communication failure is based on WARN(1?5) on system D becomi ng t rue. mr b 5/23/?4 ** i- r ~r /\ DO A 034070 CONFIDENTIAL CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev, 5/20/94:jpw DOW CONFIDENTIAL c System PSA'S Equipment Number 300 Can Made an (AC) that will choose control between the inlet / outlet transmitters on the filters beds during regeneration. In this way if one of the transmitters isn't functioning properly the operator will have the option of choosing the good one by setting an AK. Or, if one of the transmitters failure DC comes true, control will automatically switch to the other. Wrote 6 LDO light codes that indicate which transmitter is being used for control. The AK's element number is the same as the AC. The AK's will AUTOZERO if it is being used to select a transmitter and that transmitters failure DC becomes true, or if a value is given to the AK that is not equal to either transmitter number. See AC(372) for transmitter selection on PSA-1770A See AC(373) for transmitter selection on PSA-1770B See AC(374) for transmitter selection on PSA-1760A See AC(375) for transmitter selection on PSA-1760B See LDO(384), (385), (386), (387), (388) & (389) See AC(1008) & AC(364) to see how it is used in the control code for PSA's Added two alarms (328) & (354) Which are high bed differential pressure during recycle DO A 03407? CONFTDFNTIAL Corrected the problem that P-1020's were having with the Hi/Lo amps alarm when the pump wasn't running. Took the DO out of the alarm code and we are strickly using the Dl code. The problem with the DI/DO mismatch for P-1020 has been corrected in the code. It will only alarm if the pump trips. Added (step 104) to DC(1498) code for master distillation, allowing C-1500 to return to level control when the reactor moves to step (104) during start up. This should help with lining out C-1500 during this time period. Alarm (288) E-1450 high outlet temperature was modified to be a Hi outlet temperature alarm only. Added Warn (582) to the code. This alarm will activate if and when one of the Gun Barrel, Bed or Nozzle temperature transmitters fail. It is a digsum alarm and will rering if a new occurance occurs. Modified Warn(128) to look at the temperature transmitter failures of the feeds streams to R-1300 DO A 034073 C-QblF r^NTrA(_. CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 4/26/94:jpw DOW CONFIDENTIAL Training & Development Procedures Chlorinated Methanes CMP PROCEDURE PULLING P-510 SUCTION STRAINERS PROCEDURE # PURPOSE To provide the operator with a document which will assist them in properly performing a given task SCOPE To list the steps to safely and properly pull the suction strainers on the P-510 pumps RELATED PROCEDURES Na DEFINITIONS Na SAFETY CONCERNS Rubber Boots, Slicker Suits, Rubber Gloves & & EQUIPMENT Monogoggles. ENVIRONMENTAL CONCERNS NA SPECIAL CONCERNS Pump may contain Caustic and other organics This is a 2 person job. Precautions must be taken when lifting the spool piece Revision 2 . Dow Confidential Revision Date-6/21/93 -This procedure is valid for 24 hours from the date viewed, Ap' ", 26, 1994, 10:22 AM DO A 034075 CONFTDFNTTAl. Training & Development Procedures Chlorinated Methanes PULLING P-510 STRAINERS PROCEDURE Step Action 1 Inform the board operator of the job you are going to perform 2 Tag out the pump. * Suction valve * Discharge Valve! * Flush H20 * Recirculation * Field Switch * MCC switch * Bleed 3 Bleed the pump down 4 Carefully pull the spool piece out and remove the strainer 5 Clean the strainer 6 Replace the strainer back in the spool and re-install 7 Close all bleeds 8 Pull tags 9 Line up the pump Jason Bourg 4/25/94 DO A 034076 OONFTDFNTTAl Pull P-510 Simmers CHLORINATED METHANE PRODUCTS COMMUNIQUE' iew& Initial DATE: / II,199 W FROM^^-' ________________________ LJBJECT: f^jus- ^ejL-c, ^ "' T fjcefi'-' is form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Place a check mark by the group(s) needing to review. EMPLOYEE. Please initial once review is complete. GROUP Staff PERSONS NEEDING TO REVIEW Haney j^>/A Miles fl)B Bourne KHcv Ledoux /Patterson _____ JL______ Witt Supervisors / SOS's ) Clebert y ^ Trice _ l/ ' 11---------------- Breaux / \ Cook. J. C^^5ueas >W/ittmann Young /^/V. Michel , ht/ Rizzo ' ^Sauls ' --------------- ' * f--------------------- ------------------------------------------------------------- Beieler 0&. Bickham \ ^ Cook. F. Davis ^^^Grant / &> Gravouilla Jackson Millender f\ / j/fA vSfl/ Armand J__ Bishop /Bourg , L -Cavalier _____ Douce Harrison Jack ^ ^^Looney Metrejean VSMvoIfe I/]) 1 f1 /vA Q/' 1.j1 Day l/Donatto j-tL7 Grace I vJv Johnson y TSimonson Vavasseur Operators 7 Instruments / /Boure Bfuris Eunice j|^ Shanklin Rev 5/17/94 jpw DOW CONFIDENTIAL DO A 034077 c CONFIDENTIAL Bldg. 3301P May 12, 1994 Bulletin Boards Major Managers Superintendents Department Heads Dow U.S.A The Dow Chemical Company P 0. Box 150 Plaquemine Louisiana 70765-0150 Purchase of Books, Safety Shoes and Prescription Safety Glasses OBJECTIVE To improve efficiency by reducing small dollar invoices 25% by the end of 1994 and 70% by the end of 1995. (As part of the Dow North American effort to improve efficiency) BACKGROUND Current methods for purchasing books, safety shoes and prescription safety glasses require employees to fill out Dow forms, obtain signed authorization and in the case of books utilize the services of the LAD Library and Information Center for additional processing. NEW PROCESS Beginning June 1,1994, employees will be required to purchase books, safety shoes and prescription safety glasses using MSMS. Invoices for these items will be eliminated by going through MSMS. Safety Shoes and Prescription Safety Glasses - A requisition will be created by the employee or the person in their department responsible for creating requisitions using the appropriate generic code humber. A purchase release will then be created from the requisition and this release number will be given to the supplier by the employee buying the items. There are no changes to the current process after this point. SUMMARY Books - This process will be the same as above except, employee will use the generic code number which requires a complete description ofthe book. When the purchase release is created, it will be electronically transmitted to a Dow North American supplier who has been contracted with to supply all books to Dow. A process flow sheet for each of the above transactions along with the appropriate generic code numbers will be provided to all material controllers and office professionals before June 1, 1994. Questions concerning this process change should be directed to the undersigned at extension 8095. Diane LeGrange Purchasing Department DO A 034078 CONFIDENTIAL Dow U.S.A The Dow Chemical Company PO Box 150 Plaouemme Louisiana 70765 0150 Prescription Safety Eyeglasses Guidelines for All Dow Employees and Retirees as of June 1,1994 1. Only one pair of prescription eyeglasses per employee per year is recommended under our Dow Prescription Eyeglasses Program. At the discretion of the superintendent or department head, a second pair (sunglasses) may be approved for those persons whose work environment required. 2. Dow shall assume costs of all options except progressive bi-focal, computer tint and anti-reflective coatings. 3. All prescriptions shall be current within 2 years to be included in the Dow program. 4. Employees should replace or repair only necessary parts of prescription glasses to return to serviceable conditions, i.e., scratched lenses, temples, etc. 5. A Dow purchase order number is required prior to dispensing glasses through this program. 6. Payroll deduction is available for costs not assumed by Dow, or direct payment to supplier. Payroll deductions may be withheld from one or two pay periods as per employee instructions. ) DO A 004079 CONFIDENTIAL Dow U.S.A. Louisiana Division Prescription Safety Eyeglasses Order Form Employee Name:_________________________ Date: Master Number_________________________ Phone No: _ Department:_____________________________ Building No: Active Retired Qty_______ Description Received By: (Employee Signature):Received Date: Itemized Charges Dow Clear / Shaded Employee Clear / Shaded Single Vision _ Conventional Bi-focal _ Tri-focal _ Safety Frame _ < RLX/UV400 _ Tints (For Shades) __ Over-Size (56 and above) _ Over-Power __ Roll-Polish _ Heat Treat _ High Index _ Polycarbonate _ Side Shields _ Case _ Temples _ Progressive Bi-focal Anti-Reflective Coating Computer Tint Total Employee Costs $ Payroll Deductions: Pay Period Deduction: V 1 Authorization for Payroll Deductions N 2 Total Dow Costs $ dl - 4/26/94 Master Number DO A 0340R0 CONFIDENTIAL 00 A 03408 CONFIDFNT TA Process For Acquiring Safety Shoes CONFTDFNTTAL Process For Acquiring Proscription Safety Glasses i g o glasesginVM Process For Acquiring Books Supplier: Corporate Book Resources Generic Code #: 99450813 Employee creates MSMS requisition with the above generic * fill -in-theblank* code number for Books, and enters book information in appropriate blanks T QUANTITY UNIT CAT CODE 1 EACH 99450813 DESCRIPTION BOOKS, AS SPECIFIED BELOW:_____________ ~ TITLE: AUTHOR: PUBLISHER: _ DATE OF PUBLICATION: ISBN: HARDCOVER :SOFTCOVER: DOW CONTACT: DOW PHONE: ________________ 0} O QC itro o' er <r kQ. ti. (j oofcsom494 * CHLORINATED METHANE PRODUCTS COMMUNIQUE' ^yiew & Initial DATE: s/l*2. FROM: VC* VteULV '/ SUBJECT: M^vJ 'DlSTKtATioM foMTiloL This form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Place a check marie by the group(s) needing to review. EMPLOYEE: Please initial once review is complete. ,199 GROUP Staff PERSONS NEEDING TO REVIEW 4hi>w 3^4 Miles /tfftf Boume ^J^TCellev Ledoux Pullu Jn> wur' Supervisors c/' /^,/1lIiln ^ ' \ Trice ^^5^-- Cook.J. Mtiunwwwi l/ty\ Young sosy c/ Breaux Bcieler Gravouilla 0^lackson dfl' Bickham Mil lender Michel Rizzo SanS" Cdok, F. Q^L Davis 1 Grant /, K OS's ^ Armand y'c DP^Zwamson Bishop 0*^ Jack Bourg ,> ^'Cavalier _____ <05BCet-~ ^L-Bse5 UMetrejean T) ^ Wolfe Day Donatio Grace Johnson Simonson Vavasseur Operators Instruments Boura Burris Eunice Shanklin Rev. 2/4/94 :jpw DOW CONFIDENTIAL A A 03A8A 00 OOHF TO? NEW DISTILLATION CONTROL SCHEMES 5/12/94 K. Kelley As most of you are now aware, the effort has begun to make Distillation a much more energy efficient area. The C-1540 program was uploaded 5/11/94. The control scheme (analyzer -> temperature -> reflux/feed) is a little different from what we are used to here. I wanted to give you some information on where the schemes came from and what they should do for us. A team of staff members met about 3 months ago to set control programming priorities based on potential energy savings. The highest identified potentials were E-1410/E-1300 improvements, 01510,01540, K-1100, 01520, and 01500. Since that time Mike has been extremely busy. We met with the Division Distillation emphasis team. That team is analyzing every plant in the division for distillation control improvements. Their goal is to have systems in place that optimize columns and are most importantly, operator friendly! We have taken each column back to square one to pick a control scheme. There are only a few basic schemes that are implemented. C-1540 is an example of one such scheme. The scheme uses feed forward control to anticipate changes (steam/feed and reflux/feed ratios) and will eventually use analyzer data for fine tune feed back controlling. We have a definite advantage at CMP, in the fact that we have all of the hardware present to implement any scheme we want. That's a luxury not many plants have. The next pages have some graphs that highlight the potential savings these control improvement hold. As reliable control of the ppm in the overhead streams increases toward spec, the savings increase tremendously. We need the commitment from everyone to help these new schemes work. Give us feedback on what you see during nights, plant swings, etc. I'm one of the first to be pessimistic when it comes to totally changing a control scheme, but I'm going into this with an open mind. So far, I believe all of you are too. Thanks for your help. Kevin K 00 AA 04085 C CONFJTI0NTT8L. LOUISIANA CMP EXPANSION ENERGY STUDY C-1520 STEAM USAGE SAS MODEL PREDICTIONS OF ASPEN GENERATED DATA STEAM SAVINGS ($M/YR) nC oc <c C H- (- Vz C IL <[ hGc 2tL cC u LOUISIANA CMP EXPANSION ENERGY STUDY C-154Q STEAM USAGE SAS MODEL PREDICTIONS OF ASPEN GENERATED DATA fs COC <i--11 <* h- Z C Ll c <X t- ticz cc u wrc*u CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 5/12/94:jpw DOW CONFIDENTIAL ' ^85588 00 a Conftdfn??*b Training & Development Procedures Chlorinated Methanes CMP PROCEDURE ACIDITY AS ACETIC ACID IN METHANOL PROCEDURE # 460348 PURPOSE PROCEDURE FOR ACIDITY AS ACETIC ACID IN METHANOL SCOPE This procedure will instruct you on the correct way to analyze Methanol for Acidity as Acetic Acid. The analysis is a simple titration method but it must be followed correctly in order to produce accurate and reliable results. RELATED PROCEDURES SAM00008.DOC Waste disposal of solvents. DEFINITIONS None SAFETY CONCERNS & EQUIPMENT THERMAL NONE CHEMICAL: Remember you are working with chemicals that may cause skin and eye irritation. Safety glasses should be adequate for eye protection. MECHANICAL: Use caution when working with glass. EQUIPMENT: 1) Liquid sample to be analyzed 2) 0.05 N NaOH (ASTM E-200; sec 12 - 17) 3) Phenolphthalein Indicator Solution (ASTM D1613-85 SEC. 7.0) 4) 50ML Graduated Cylinder 5) 250ml Erlenmeyer Flask 6) Stirring Bar and Stirrer 7) Distilled H20 ENVIRONMENTAL CONCERNS None Revision#-. 1 Dow Confidential Revision Dale: 7/15/93 This procedure is only valid for 24 hours of date viewed, May 12, 1994, 9:10 AM Training & Development Procedures Chlorinated Methanes CMP PROCEDURE ACIDITY AS ACETIC ACID IN METHANOL PROCEDURE #LAB00028 SPECIAL CONCERNS Calculations; (for 50 mis of sample) Acidity as Acetic Acid, weight % " (VN x 0.12)/D V = Mis of NaOH for titration of sample N = Normality of the NaOH solution used. D = Specific Gravity of the sample, (use .780) (To convert wt% to ppm multiply by 10,000) TV 6/93 LAB00028.DOC A 03A090 CONFIDENTIAL Training & Development Procedures Chlorinated Methanes CMP PROCEDURE ACIDITY AS ACETIC ACID IN METHANOL PROCEDURE #LAB00028 PROCEDURE Step Action 1 Measure into the 250-ml Erlemneyer flask 50ml of distilled water. 2 Add 8-10 drops of Phenolphthalein indicator to the distilled water. 3 Titrate the water with 0.05N NaOH until the first perceptible pink color. Don't worry about the MLS used to titrate this water. 4 Add 50 mis of sample to be analyzed to the Erlemneyer Flask. 5 Titrate the sample with the 0.05N NaOH. 6 End point is reached when the color of the sample is changed form clear to pink. At this point stop adding the 0.05N NaOH. 7 Note the MLS of 0.05 N NaOH used for the titration of the Methanol sample. 8 Record the MLS used in the titration and use the calculations listed in the special concerns of this procedure to calculate the weight % acidity as acetic acid. TV 6m LAB00028.DOC 00 A 034091 CONFIDENTIAL ? CHLORINATED METHANE PRODUCTS COMMUNIQUE' jview & Initial DATE: FROM: ______ [].199 if SUBJECT: Gee tl Ho uf e. feefl n1 /j This form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Place a check mark by the group(s) needing to review. EMPLOYEE: Please initial once review is complete. GROUP PERSONS NEEDING TO REVIEW StafT Haney y Witt Q^^Clebert Supervisors P Trice Miles Wf l Boume Keliev C Cook. J. Witlmann Dugas /* /A*i Michel Young Ledoux /Patterson Rizzo Sauk SOS's y OS's ^ Breaux i-V`\ Beielcr Gravouilla Jncksol^ 7- Bickham Millender Cook, F. Davis Grant / fy^VArmand ( i^^ishoD //^3 Bourg /!--Cavalier Doucet ^ < ^FtLviamson Cfe Jack I * Loonev Metreiean ^*) tU Wolfe / | Day fyGGDonatto Grace Johnson ^ Simonson Vavasseur Operators y ___^/^ourg Instruments __^/f3urTis VVvit; Eunice ^ Shanklin / ** Rev. 2/4/94 :jp\v DOW CONFIDENTIAL DO A 03409? CONFIDENTIAL 1. WHAT DOES ON-THE-JOB HOUSEKEEPING MEAN? TAKING CARE OF YOUR WORK AREA, KEEPING EVERTHING YOU NEED TO DO YOUR JOB CLOSE AT HAND AND IN GOOD CONDITION 2. WHY IS GOOD ON-THE-JOB HOUSEKEEPING AN IMPORTANT PART OF EVERYONE'S JOB? BECAUSE IT PROMOTES THE SAFETY AND WELL BEING OF THE INDIVIDUAL AND HIS CO-WORKERS 3. WHAT ARE SOME OF THE BENEFITS OF GOOD HOUSEKEEPING? MAKES YOUR JOB SAFER, EASIER, BETTER QUALITY, MORE FUN, WORK IS LESS TIRING, YOU HAVE.MORE SPACE, IT'S MORE PROFESSIONAL, AND LESS AGGRAVATING 4. WHAT ARE SOME OF THE WAYS WE CAN ALL MAINTAIN GOOD HOUSEKEEPING IN OUR WORK AREAS? PICKING UP, ORGANIZING AND CLEANING UP AS YOU DO YOUR JOB, DISPOSE OF SCRAP AND WASTE IN PROPER RECEPTACLES, KEEP FLOORS FREE FROM SPILLS AND LOOSE OBJECTS, KEEP AISLES, STAIRS, AND WALKWAYS CLEAR AT ALL TIMES, DON'T OVERFILL RACKS, BINS OR STORAGE AREAS, PUT THINGS AWAY WHEN YOU ARE THROUGH WITH THEM, IF YOU SMOKE, DO SO IN DESIGNATED AREAS ONLY AND USE ASHTRAYS. frn{ WHAT ARE SOME OF THE HOUSEKEEPING PROCEDURES NECESSARY IN A PLANT ENVIRONMENT? CLEAN AND STORE TOOLS PROPERLY, FIX OR REPORT BROKEN TOOLS, STORE MATERIALS PROPERLY, CLEAN AND MAINTAIN MACHINES PROPERLY, KEEP YOUR WORK AREA CLEAN, MAINTAIN LIGHTING 6. BESIDES CREATING A SAFER WORK ENVIRONMENT FOR THE INDIVIDUAL, WHAT DOES GOOD HOUSEKEEPING SAY ABOUT THE COMPANY YOU WORK FOR? IT REFLECTS QUALITY. IF YOUR WORKPLACE LOOKS SLOPPY PEOPLE WILL ASSUME THE WORK YOU DO IS SLOPPY ALSO. 1. WHAT ARE SOME SPECIFIC HOUSEKEEPING RELATED ITEMS TO BE CONSIDERED WHEN PLANNING A JOB? INSPECT TOOLS TO MAKE SURE THEY ARE IN GOOD CONDITION, MAKE SURE YOUR WORK AREA IS CLEAN IF NOT DON'T BE ASHAMED TO PICK UP SOMETHING, DUMPSTERS (KEEP ORGANIZED, HELPS PRODUCTION DO NOT NEED TO SEPERATE) TRASH CANS- HAVE AVAILABLE AND KEEP THEM CLEAN, DON'T OVERFILL, HAVE TOOL BOXES. KEEP MATERIAL STORAGE AREA NEAT, THERE ARE EXTREME TRIPPING HAZARDS IN THESE AREAS 00 A 034093 CONFIDENTIAL GOOD HOUSEKEEPING 8. WHAT HOUSEKEEPING HAZARDS SHOULD EVERYONE BE AWARE OF AFTER THE JOB IS IN PROGRESS? TRIPPING HAZARD--LEADS. HOSES, EXTENSION CORDS, STAIRWAYS AND ACCESS WAYS. (TIE UP, RUN CLOSE TO STATIONARY OBJECTS, USE YOUR EXPERTISE) TOOLS AND MATERIALS--PICK UP AND PUT IN THE RIGHT PLACE. DON'T LEAVE THINGS LYING AROUND. DAMAGED TOOLS--HARNESSES. CHECK THESE VERY CLOSE 9. WHO'S RESPONSIBILITY IS IT TO MAKE SURE GOOD HOUSEKEEPING IS KEPT UP? EVERYONE'S! DON'T PASS THE BUCK. IF YOU SEE SOMETHING OUT OF PLACE, PICK IT UP. 10. WHO SUFFERS IF GOOD HOUSEKEEPING IS NOT KEPT UP? EVERYONE DOES. WORKERS AND COMPANY 11. WHAT ARE SOME BENEFITS YOUR COMPANY GAINS BY GOOD HOUSEKEEPING? IMPROVES MORALE, INCREASES PRODUCTIVITY, AND REDUCES COST 12. WHAT HAPPENS WHEN EVERYONE MAKES A CONSCIENCE EFFORT TO MAINTAIN GOOD HOUSEKEEPING? IT BECOMES HABIT-FORMING. ONCE IT'S CLEAN IT'S EASY TO KEEP CLEAN AND LOOKS DIRTY WHEN SOMETHING IS OUT OF PLACE. 13. DO YOU HAVE ANY SUGGESTIONS ABOUT HOW TO IMPROVE THE SAFETY PROCEDURES FOR YOUR JOB THROUGH GOOD HOUSEKEEPING? NO INCORRECT ANSWER 00 A 034094 CONFIDFNTTAl CHLORINATED METHANE PRODUCTS COMMUNIQUE' eview &. Initial DATE: 11-May , 1994 from: Gary Rizzo SUBJECT: Its time to start working on the module review and updates for the second quarter. I Placed a box on the book shelf in the control room with the modules and the names of the Responsible Parties. Module revision includes IPT Module, Test, Test Answers, Resources and Procedures. The information should be reviewed for accuracy with the Engineer or supervisor who is responsible for that particular area of the plant. Once the material has been reviewed and both you and the area engineer/supervisor agree with the changes, hand them back in and I will have the changes made. * This form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Place a check mark by the groupis) needing to review. EMPLOYEE: Please initial once review is complete. GROUP StafT PERSONS NEEDING TO REVIEW Hanev Miles ---- Bourne -------- J-Wm /OWoung Kelley ^^-"'l.edoux ---------- Patterser Supervisor! ^ --Clcbcrt; J. , Cook, J. Dugas /j-iH' Michel Trice Rizzo X SOS'! X OS'! X Day a Breaux ^~) Beieler Bickham <^Cook, F. " Davis ^ Grant Oft Gravouilla tV/7 Jackson J^J/yMillender jisrW Axmand Jj^^&ishop oura 1 /ft 1 Cavalier -----------Doueet ntf ^ C Harrison i IlfJack I ' Looney '^T^TrN'Metreiean^\) U) Wolfe ("jonatto t\ Grace ---------- Johnson ---------- Simonson Vavasseur Operators X Instruments Bourg Burris Eunice Shanklin Rev. 5/ll/94.jpw DOW CONFIDENTIAL DO A 004095 CONFTDFNTTAl CHLORINATED METHANE PRODUCTS COMMUNIQUE' view &. Initial DATE: 6-May ___________________________. 1994 from: Gary Rizzo____________________ SUBJECT: Please read the revised attached procedure, E-455 Start up and Liquid N2 _______________ This form is used to insure the attached information is communicated to the appropriate plant personnel. INITIATOR: Plate a check mark by the group(s) Deeding to review. EMPLOYEE: Please initial once review is complete GROUP PERSONS NEEDING TO REVIEW StafT Haney ' Miles ----------Bourne Kelley Ledoux ----------Pattersor X Supervisors sf-Witt j^Z?^'Clcbcrt. J. oun vC!_Cook, J. Dugas /l/H' Michel Trice Riz2o X SOS's X OS's X tl vV7/ Breaux . J Beieler ($k Bickham --Cook. F. (* M-Davis `^""'Grant . Gravouilla /Cf Jackson /xtK Millender /, Armand Bishop /s/~> Boutr .Cavalier ---------- Doucct lY^JJarrison 0^ Jack C /| /^ Looney Lv Metrejean .pCUJWolfe / Ekey Day Donatto Grace Johnson Simonson Vavasseur Operators Instruments Bourg Burris Eunice Shanklin Rev. S/6/94:jpjv O'**V CONFIDENTIAL DO A 034096 CONFTDFNTTAL Training & Development Procedures Chlorinated Methanes CMP PROCEDURE E-455 START UP PROCEDURE (E455SU.DOC) PROCEDURE # 460489 PURPOSE SCOPE RELATED PROCEDURES To ensure the safe start up of the DV-455 vent recovery system. This procedure covers the line up of equipment and routine valving associated with a normal start up of the E-455 vent recovery system. N2TRUCK.DOC -Liquid N2 tank truck offload procedure E455SD.DOC - E-455 system shutdown DEFINITIONS Air Liquide- Liquid nitrogen tank vendor. SAFETY CONCERNS & EQUIPMENT ENVIRONMENTAL CONCERNS Frostbite : Line openings on any liquid nitrogen system are very hazardous because of the threat of frostbite. Additional safety items required for a liquid nitrogen line opening are: long sleeves, heavy gloves, face shield. The system must be started up properly to ensure the vent recovery system will operate correctly. This system is required in order to control methanol emissions to the atmosphere. SPECIAL CONCERNS None. Revision # 2 . Dow Confidential Revision Date- 5/5/94 This proc, ' -re is valid for 24 hours from the date viewed, 5/6/94 09:44 AM DO A 034097 OONFJDFNTTAI. Training & Development Procedures Chlorinated Methanes E-45S START UP PROCEDURE (E455SU.DQO PROCEDURE E-455 Start Up Procedure The Following Items Must Be Checked (Yes) Prior To E-455 Being Started Up. NOTE: The Only Time This Check Sheet Needs To Be Filled Out, Is If We Are Down For An Extended Period Of Time. (Supervison Approval) Step Action 1 Have all red tag masters been cleared and tags pulled. (Outside OS/SOS) 2 Does T-455 have at least 35% level in it? 3 NOTE: Communicate with the Mod V Boardman to make sure control valves, instrument air, and transmitters are ready to be lined up. When the OK is given, line up the items listed below. Leave the liquid N2 at T-455 manually blocked for the time being. T-455 GROUND LEVEL: A. T-455 LEVEL TRANSMITTER AI(5W) B. T-455 N2TO AO(514) MAN. BA ON BOTTOM OF TANK C. PAD N2 LINED UP FROM HEADER TO AO(515) Chvck E-455 ON TOP OF DV-455 A. NITROGEN PAD C/V AO(515) LINED UP B. VENT CONTROL VALVE AO(503) LINED UP C. AK503) E455 OUTLET PRESSURE D. AI(514)E455 OUTLET TEMP OK? E. AK513) DV 455 PRESSURE (INLET TO E455) F. AK515) E455 INLET TEMP OK? G. AI(512)N2 VENT TO ATMOSPHERE TEMP OK? H. AO(514) LIQUID N2 CONTROL VALVE TO E-455 I. AIR VENT VAPOR TRAP AT LIQ N2 VALVE LINED VP J. ENTIRE SYSTEM LINED UP AND READY TO COOL DOWN? KJK2/94 rcv.5A4 E455SIUXX1 DO A 034098 CONFIDENTIAL Training & Development Procedures Chlorinated Methanes E-455 START IIP PROCEDURE (E455SU.DQ1 4 Cool down the liquid N2 line to E-455 as per following page. 5 All bleed valves are closed and blinded or plugged Checklist complete: _________________ Date/Time: Approved by: (supervisor or boardman) Date/Time: KJK 2J9A rev.5/94 E455SU.DOC D0 * oV1*' 00^1 Training & Development Procedures Chlorinated Methanes E.455 START UP PROCEDURE (E455SU.DOQ SOS Pre-Start Up Check Sheet The Following Items Must Be Checked Prior To Start Up. Step Action 1 E455-Sequence 52 in Step 520. All red tag masters been cleared, control valves and instruments are in auto. System is ready for start up. 2 T-455 level greater than 35% 3 Have OS cool down liquid N2 line and E-455 4 Mod V start up checklist items complete. 5 E-455 Sequence 52 terminated to Step 521. Check 6 Make sure that the following AK's and AP's have the correct setpoints. Use Dynamic Data Display (GPI option 18). Choose (9) Vent RecoveiyE-455 System, then choose (4) E-455 start up set points. AK's 1. AK(550) - DV-455 pressure set point 2. AK(552)- E-455 nitrogen outlet temp setpoint 3. AK(553)- E-455 process outlet temp setpoint AP's 4. APO200) T-455 low level alarm 5. APU202) High E-455 DP alarm 6. AP(1204) - high processoutlet temperature 7. AP0262) - H/H pressure 8. AP( 1212) - AP- L/L pressure 9. AP(1217) - HLA Value/chk 2.5________ -50________ -25________ Value/chk 25________ _2J________ -40________ _3jj 0-75_______ _95________ Checklist complete: _________________ Date/Time: Approved by: (supervisor) Date/Time: KJK2/94 rev.5^4 E455SU.DOC DO A 034100 CONFTDFNTTAL Training & Development Procedures Chlorinated Methanes E-455 START UP PROCEDURE (E455SU.DOC) PROCEDURE E-455 Vent System Start-Up Step Action 1 Move E-455 sequence 52 to Step 520. Ensure all red tags are cleared and the system is ready for start up. T-455, liquid nitrogen tank should have an adequate level in it for start up. All control valves except the liquid N2 C/V should be in auto, all instruments should be in normal mode. 2 Terminate to Step 521. The OS should begin lining up the system as per the outside OS checklist. 3 System cooldown. Ensure the liquid N2 b/v at T-455 is closed. Open the liquid N2 C/V in manual to 100%. The OS should then open the manual B/V at T-455 1/4 to 1/2 turn. A steady, heavy vent should be coming out of the PRV near E-455 on top of DV-455. Watch E-455 outlet temperature. When it becomes less than 0 C, manually close the liquid N2 C/V. The OS will open the manual B/V at the tank all the way. Complete the line cooldown by opening the liquid N2 C/V to 60-70% until the E-455 outlet temperature is less than -40 C. 4 Complete the E-455 Start Up Check Sheet & Mod V Check Sheet. Review the AK's and AP's through the Dynamic Data Display (GPI option 18). (NOTE; The check sheets only need to be filled out ifwe are starting up after being down for a long duration) 5 Terminate step 521 to step 522. 6 Once the MOD enters step 522, ensure that all controllers are enabled for normal operation. AO(515) and AO(504) should control DV-455 pressure, while AO(514) works to control the temperatures around E-455 based on the pressure in DV-455 KJK'2/94 rev.5/94 E-CSSSU.DOC DO A 034101 CONFIDFNTTA!.. Training & Development Procedures Chlorinated Methanes CMP PROCEDURE ORDERING LIQUID NITROGEN FOR T-455 PROCEDURE # 460490 PURPOSE To provide operator with the correct information needed to order liquid nitrogen for T-455. SCOPE This procedure covers the things needed to be done in order to order and receive liquid nitrogen for T-455. RELATED PROCEDURES DEFINITIONS E-455 start up procedure. Air Liquide- Vendor that supplies liquid nitrogen for CMP. SAFETY CONCERNS & EQUIPMENT Truck driver will use gloves and arm protection when dealing with the liquid nitrogen. The refrigerated liquid is a serious frostbite hazard. ENVIRONMENTAL CONCERNS Not ordering liquid in time could cause a shutdown of the system. This would be a control device out of service. SPECIAL CONCERNS none. Revision # 1 . Dow Confidential Revision Date- 5/5/94 This procedure is valid for 24 hours from the date viewed, 5/6/94 09:44 AM r/ 00 A 034102 t CONFT OFNTTAl Training & Development Procedures Chlorinated Methanes ORDERING LIQUID NITROGEN FOR T-455 PROCEDURE Ordering liquid nitrogen. Step Action 1 When the low level alarm is recieved on T-455, a shipment of liquid nitrogen needs to be scheduled. If the tank would happen to go empty, CMP would have a control device out of service noncompliance. 2 Contact the area engineer to place an order of liquid nitrogen. 3 The engineer will contact Air Liquide. For emergency contact, the local rep is Vic Crystal, phone # 685-4200. The normal contact numbert is 1-800-324-2855. 4 48 hours notice is preferred, although emergency delivery may be made in 4-6 hours. 5 Set up a time for the arrival of the shipment. Complete purchase, requistion. Air Liquide rep will be able to estimate amount (should need about 373 standard cubic ft of N2 per Vc of tank increase is needed). Dow code # 1308020 is for 1 cf of liquid nitrogen from Air Liquide. 6 -ARRIVAL OF THE NITROGEN- The driver will stop at CMP to inform him of the shipment. Make a copy of the shipping order papers, they serve as the Certificate of Analysis for the N2. 7 Write.a permit for the driver to offload the liquid nitrogen. The permit should be co-signed by Glycol /. The potential of frostbite due to expose to liquid nitrogen should be considered. Issue a radio to him (so contact may be made in the event of an emergency). Inform him that permit must returned when his work is completed. The site should be visited prior to permit issue. The driver should be accompanied by a Dow Operator. 8 Inform the ModV SOS that a truck will be offloading into T-455. 9 Truck driver will have all necessary off-loading equipment. 10 Monitor level during transfer until transfer is complete. KJK 2BA rev 5194 UQN2 LX)T 034103 DO ^ CONF1 CHLORINATED METHANE PRODUCTS COMMUNIQUE' Rev. 2/4/94 :jp\v DOW CONFIDENTIAL DO A 034104 CONFIDENTIAL T The following list comprises the added logic to the distillation area which will be incorporated into the next Mod 5 upload scheduled for May 5th. Please look over the list and familiarize yourself with the coding if necessary. 1. REQ(406) - T1555A LOW LEVEL. The operator will be able to clear the alarm with DM(156). Alarm integrity is still maintained using DCO's. The alarm graphics will reflect the DM() addition. 2. REQ(414) - T1555B LOW LEVEL. The operator will be able to clear the alarm with DM087). Alarm integrity is still maintained using DCO's. The alarm graphics will reflect the DM0 addition. 3. Coding was added to EC-1540 C&D finfans which allows the fans to drop out if the master controller is running at a low value. The code has been modified to ramp down the outputs to C&D once they are de energized. 4. The enable for C-1500's feed control valve was rewritten to look at one of the P-1450's running. The valve will become disabled and closed given both pumps are down. 5. C-1500's overhead HCL AOV selection AK(881) will now be zeroed by a one second blip given the Master Distillation sequence enters STEP(263) R-1300 DOWN. This feature will allow operations' to send product forward while in STEP(263) without having to place DO's in manual. 6. C-1510 will now have an overheads M3 analyzer controller capable of resetting a reflux to feed ratio. In addition, a function generator will also produce a ratio to be used in conjunction with the AIC. The fxn generator calculates a R/F (reflux-to-feed) ratio as a dependent on column pressure and the desired M2/M1 ratio. The fxn generator and AIC work in unison to produce a summed ratio which is used to calculate the needed reflux flow- Flexibility exists such that the fxn generator or AIC can be enabled or disabled by setting the appropriate DK's. For a further explanation see the expanded glossary for AO(136). In order for the fxn generator to produce correct R/F numbers, operations* will need to start using the M2/M1 controller for C-1510's overhead temperature controller. AK(846) is the M2/M1 setpoint for this controller. The analyzer control scheme resides on the PICSVAX. The control overview diagram has been modified to suite the new controller. One point needs to be emphasized, the AIC setpoint is entered on the Mod as AK(100). No set points 00 A 034105 . CONFrIOF'NTTAl will be entered on the PIC5VAX machine except ones set by an engineer or designee. :- GPI screens have been built to emphasize both the cqntrol block diagram and the column ratios. REQ064) -01510 HIGH M3 IN THE OH'S will be added to the alarm list RQ(193) - C-1510 OH M3 ANALYZER SIGNAL FAILURE - STOP ANAL CONTROL-will be added and will stop the analyzer contribution to the controller and retian the last good setpoint. 7. All column DP alarms have been modified to suite low pressure situations. Alarm grids will be updated to reflect these changes. 8. 01540's tray temperature will be controlled by a new scheme which uses the reflux as the manipulated variable in conjunction with a reflux-to-feed ratio. The overheads' M4 analyzer will be capable of setting the temperature setpoint by which to control the selected tray temperature. Given a change in temperature setpoint, the TIC will alter a reflux-to-feed ratio, which uses a lag function to characterize the feed flow, and thus the reflux flow. The steam is going to be manipulated by a steam-to-feed ratio set by operations'. The feed is also characterized with a lag module. The analyzer control scheme resides on the PICSVAX. The control overview diagram has been modified to suite the new controller. The AIC setpoint is entered on the Mod as AK(312). No set points will be entered on the PICSVAX machine except ones set by an engineer or designee. The old DK(500) functionality still exists and follows as: column tray temp manipulates column level manipulates DK<500)-0 bottoms' valve steam setpoint DK(500)=1 reflux setpoint bottoms' valve GPI screens have been built to emphasize both the control block diagram and the column ratios. 00 A 034106 CONFTDFNTTAl 9. PSA1750 will have a high DP alarm written for the beds whenever the regen pressure on a given bed is different from the suction pressure on the vacuum pump. This correction is a follow up item to complete due to the PSA air permit exceedance experienced. 10. A variable ramp rate has been added to C-1500's feed flow setpoint. The variable differs given WARN(lll) - C-1500 HI-HI LEVEL or WARN(143) 01510 HI-HI LEVEL become true or STEP(263) - R-1300 SHUTDOWN step is entered in the Master Distillation sequence. The two alarms will use AP(80) as the constant and AP(1584) for STEP(263). 00 ^ 034107 CONF rOFNTTAL