Document wDX9ojZL4E6o7VGqzK9B10Q1Q

2*Jic (REV. 4-79) Shell Oil Company Shell Chemical Company Interoffice Memorandum JUNE 27, 1984 7*0.3 FROM: MANAGER SAFETY DEER PARK MANUFACTURING COMPLEX TO: SEE ATTACHED LIST SUBJECT: REVISION TO SAFETY ORDER S-115, "PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS" A significant effort is underway in the Maintenance Organization to upgrade the paint program at DPMC North. In implementing this program, it is de sirable that surface preparation and painting be done at the optimum time. Therefore, it is important that sandblasting and painting activity is done on equipment that is in service. Our existing Safety Orders permit this activity in most instances and outline the controls under which the work must be performed. Although there has been high activity in this area in the past year, the process has been handled well and there have been no significant safety incidents. One case where sandblasting and painting are not allowed is on the roof of sour tanks (S-115 Procedures For All Activities Involving Sour TanksSection V, Item G). In light of the aggressive paint program at DPMC North, a group was assembled to review the concept of painting on the roof of sour tanks to determine if revisions to the order were reasonable. The group members are listed below: J. E. Holloway H. L. Lee R. Lopez W. B. May H. H. Peoples J. W. Repp T. A. Roberts P. J. Snyder L. A. Sweeten Central Maintenance Safety Maintenance - Shops & Shift Operations East - Cat. Reforming Dispatching Operations Safety Central Maintenance Industrial Hygiene Pressure Equipment This group feels that it is reasonable to revise Safety Order S-115 to permit sandblasting and painting on the roof of sour tanks. When appropriate controls are implemented and followed, this work can be accomplished in a safe manner. A Refinery Maintenance Order has been drafted outlining the procedure to be followed for in-service blasting and painting. A copy is attached for your review and comment. If these procedures are acceptable, Safety Order S-115 (also attached) would be revised as follows: LAM 004291 DPMC-10373 REVISION TO SAFETY ORDER S-115 continued Page 7, Item G - Delete items 1 and 2 concerning the painting of sour tank roofs and shells Insert the following revision: 1. Abrasive blasting and/or painting the roof and shell of sour tanks in service will be permitted provided the procedures in Maintenance General Order - Attachment VI, are followed. Return of your comments by August 15, 1984 would be appreciated. H. L. Lee HLL:mh Attachments cc: R. M. Kemball-Cook J. E. Holloway H. L. Lee (15) R. Lopez W. B. May H. H. Peoples J. W. Repp T. A. Roberts P. J. Snyder L. A. Sweeten N/Adm Satellite 2 LAM 004292 DPMC-10374 SHELL DEER PARK MANUFACTURING COMPLEX REFINERY PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS SAFETY S-115 PAGE 1 OF 8 JUNE 1, 1978 I. PURPOSE The purpose of these procedures Is to establish instructions for safe operation, maintenance and inspection of sour storage tanks. Sour storage tanks can contain hazardous concentrations of toxic substances, notably hydrogen sulfide or mercapcaas. An understanding of the various types cf tanks, and the correct procedures to be used in working with these tanks, is essential to personal safety. II. DEFINITIONS A. H,,S (Hydrogen Sulfide). A colorless, flammable, and highly toxic gas having a sweetish taste, and in low concentrations an offensive "rotten egg" odor. B. Mercaptan. A sulfur bearing hydrocarbon that is a colorless, flammable and extremely toxic gas with an offensive "sulfur type" odor. C. Sour. As used in these procedures, it is defined as any hydrocarbon, chemical, or water that can produce a vapor at storage temperatures which contains or mercaptan. D. Cone Roof Tank. A tank that has a fixed conical roof, cylindrical shell, and flat bottom, plus a vapor space between the surface of the stored liquid and the fixed cone roof. See Attachment I. E. Internal Floating Roof Tank. A tank that has a fixed conical roof, cylindrical shell, and.flat bottom, plus an internal roof that floats on the surface of the liquid (until the liquid level goes below the roof support height). It has a vapor space above the floating roof. Also, when the liquid level is below the internal roof support height, a vapor space exists between the liquid and the internal floating roof. See Attachment II. F. External Floating Roof Tank. A storage tank with a fixed cylindrical shell and flat bottom, plus a roof chat floats on the liquid. There is no confined vapor space when the roof is floating on the liquid. " There Is a vapor space below the roof when the liquid level is below the secting of the roof supports. See Attachment III. LAM 004293 DPMC-10375 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS_____________ SAFETY S-115 PAGE 2 OF 8 JUNE 1, 1978 G. Gauge Hatch. A device attached to the top of a gauge pipe or roof of a tank that has a hinged cover chat permits opening for gauging and sampling the liquid stored. See Attachments I, II, and III. H. Gauge Pipe. A pipe that is attached to the fixed roof of cone and internal floating roof tanks. It has a gauge hatch on the top end and extends downward through the tank to within one to two feet from the bottom. It is used to isolate the vapor space from the gauge hatch. See Attachments I and II. I. Sample Lines. This includes piping and valves connected to the shell of a tank for the purpose of removing samples of the stored liquid at desired levels. See Attachment I. J. Ground Reading Gauge. This is an external device that'provides a level measurement of the sto'rge liquid at ground level. It is connected by piping to the roof on fixed roof tanks. See Attachments I, II and III. K. Conservation Vents. This is a device attached to the roof of storage tanks to protect against excessive incernal pressure or vacuum. See Attachments I, II and III. L. Gas Blanket Facilities. This is used to maintain a positive pressure in the vapor space of a cone or internal floating roof tank for protectioof the stored product or the equipment. The blanket gas is normally nitrogen or natural gas. See Attachments I and II. M. Manometer. This is a device used to measure internal pressure or vacuum in a storage tank. The pressure or vacuum is normally given in inches of water. N. Forced Exhaust Mode. This is a condition where the content of a tank vapor space is pushed through one or more of the roof openings at a very high rate. The roof openings to be considered are the gauge hatch, conservation vent, gas blanket piping, manometer piping and sample lines. These openings are all capable of venting in the forced exhaust mode. The forced exhaust mode can be particularly hazardous, resulting in personal exposure to toxic concentrations of or mercaptans. If the tank is equipped with a gauge pipe and the liquid level is above the bottom opening of the pipe, very little exhaust will occur through the gauge hatch under any condition. However, if there is no gauge pipe, or the liquid level is below the opening of the gauge " pipe, and the pressure in the tank is near the conservation vent setting, a large amount of vapor will be forced out the gauge hatch when opened. If there is no other cause to maintain flow, such as high pump-in rate or gas blanket facilities, gradual reduction in velocity through the opening will occur. LAM 004294 DPMC-10376 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS SAFETY S-115 PAGE 3 OF 8 JUNE 1, 1978 Conditions that influence the exhaust rate at a roof opening are the tank size, solar heat, the vapor volume, gas blanket facilities, tank pressure in the vapor space, and high pump-in rate. To produce forced exhaust mode may take a combination.of one or more of these conditions. Guides to determine if a tank might be in the force exhaust mode are: 1. Pump-in rate greater than 400 barrels/hour. 2. Gas blanket facilities and less than three feet of liquid in the tank. 3. Tank pressure greater than 0.5 inches of water. 0. Standby Person. The standby person is expected to be able-to quickly don the breathing apparatus, remove the -victim from the area of exposure, and request emergency medical assistance. III. GENERAL A. These procedures will be sub-divided for (1) fixed roof tanks and (2) external floating roof tanks. Tanks with internal floating roofs will be considered fixed roof tanks for these procedures. An external floating roof tank with the liquid level below the roof will be created as a fixed roof tank. B. Operating departments shall determine tankage in their areas that shall be classified sour, and publish a list of such tankage along with this order. This list should also identify tanks that normally exceed 10 ppm HjS and 50 ppm H^S in the vapor space (see Attachment IV). All tanks classifled sour shall be provided with H^S warning signs. An H^S warning sign must be placed at the stairway (ladder) entrance. C. Operating personnel shall determine when sour tanks are operating in a forced exhaust mode. Permits written for work on such tankage will clearly scate "sour tankage--forced exhaust mode". IV. OPERATING PROCEDURES A. Gauging and Sampling from Top of Tank - Fixed Roof Tanks 1. When a sour tank can contain greater than 50 ppm H.S in the vapor space and is operating in the FORCED EXHAUST MODE, a self-contained breathing apparatus shall be worn by the gauger or sampler during this task, including ascending and descending the tank. In addition, a standby person, with a self-concained breathing apparatus, will be stationed within view of the gauger or sampler. 2. When the vapor space of a sour tank contains greater than 50 ppm cf H7S and is not operating in the forced exhaust mode, MSA, Type SS--17 canister mask or a self-contained breathing air mask shall be worn by the gauger or sampler during the task. LAM 004295 DPMC-10377 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS SAFETY S-115 PAGE 4 OF 8 JUNE 1, 1978 3. When the vapor space of a sour tank contains less than 50 ppm E-S, and is not operating in the forced exhaust mode, the gauger or sampler does not require respiratory equipment. However, the gauger or sampler shall always stand on the windward side of the gauge hatch and keep his head at least three feet away from the' opening. B. Gauging and Sampling from Top of Tank - External Floating Roof 1. If the roof is floating, the gauger or sampler does not require respiratory protection. They will restrict themselves to the gauging platform. 2. If the roof is not floating the procedures for fixed *005 tanks will be used. 3. Refer to Section IV-F for access to a floating roof. C. Gauging and Sampling of Tanks at Grade - All Sour Tanks 1. When a sour tank is equipped with a ground reading level instrument, respiratory equipment need not be worn by the gauger while taking level readings. 2. When a sour tank contains more chan 50 ppm H^S in the vapor space and the sample connection is in the vapor space, a MSA, Type SS1, canister mask or air supplied respirator shall be worn while sampling. If the sample connection is below the liquid level or the tank contains less than 50 ppm HjS in the vapor space, samples may be taken without breathing equipment. The sampler shall stand on the windward side while working. D. Drawing Water and Valve Repair - All Sour Tanks 1. Respiratory equipment is not required to operate che water draw valves or repair leaking isolation valves. However, the operator shall stand on the windward side and keep his head at least three feet from the discharge opening. If these precautions cannot be followed, an MSA, Type SS-1 canister mask shall be worn. E. Cleaning See Refinery Safety Order S-107. LAM 004296 F. Floating Roof Access ^ Access to a floating roof is permitted only with a written Firs and Safety Permit. The safety inspector shall wear respiratory protection while testing the air above che floating roof. Subsequently, the safety inspector will specify appropriate respiratory protection requirements on the Fire & Safety Permit, in keeping with the following guidelines. DPMC-10378 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS_____________ SAFETY S-115 PAGE 5 OF 8 JUNE 1, 1978 1. H^S levels Less than 10 ppm - no respirators required, subject to limitations specified below. 10-50 ppm - canister mask (MSA type SS-1) or air supplied breathing apparatus. Greater than 50 ppm - air supplied breathing apparatus. Further, a standby person is required, also equipped with air supplied breathing apparatus. 2. Floating roof level (relative to top of tank shell) If floating roof is within six feet of the tank 'Shell top, and below 10 ppm,"no respirators are required. However, respiratory protection must be within easy reach for each person on the roof. Further, respiratory protection may be specified if certain tasks are to be performed that would incur the probability of H^S exposure. If the floating roof is down more than six feet from the tank shell top, air supplied breathing apparatus is required. This precaution is necessary because of the possibility of unpredictable changes in roof "ventilation", leading to unpredictable increases in concentrations. G. Firewall Entry - See Refinery Safety Order S-109. V. MAINTENANCE PROCEDURES A. Conservation Vents, Gas Blanket Facilities, and Foam Chambers - Fixed Roof Tanks Maintenance on conservation vents, gas blankec facilities, or foam chambers, can result in direct exposure of the craftsman to the contents of the tank vapor space. Consequently, the following precautions apply. 1. Maintenance may not be performed on conservation vents, gas blanket facilities, or foam chambers when the tank is operating in a forced exhaust mode. This requirment is intended to protect the craftsmen and surrounding environment from forced exhaust exposure to H_S, mercaptan, or flammable or toxic materials that may be present in the tank vapor space. 2. Maintenance of conservation vents, gas blankec facilities, or foam chambers on sour tankage requires respiratory protection as specified below. LAM 004297 DPMC-10379 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS_____________ SAFETY S-115 PAGE 6 OF 8 JUNE 1, 1978 a. H^S levels - in the tank vapor space less than 10 ppm - no respiratory protection required. Caution should be exercised to stay on upwind side. i 10-50 ppm - canister mask (MSA type SS-1) or air supplied breathing apparatus. greater than 50 ppm - air supplied breathing apparatus. Further, a standby person is required, also equipped with air supplied breathing apparatus. b. Adjacent tasks - for maintenance tasks Immediately adjacent to conservation vents or any other possible source of large volume tank vapors, respiratory protection in keeping with criteria in part (a) above is required. B. Ground Reading Gauge 1. Maintenance on ground reading gauge equipment of a fixed roof sour tank shall not be performed if the tank is operating in the forced exhaust mode. 2. When a fixed roof sour tank can contain more than 50 ppm H,S in the vapor space and is not operating in the forced exhaust"mode, MSA, Type SS-1 canister mask or air supplied breathing apparatus shall be worn while performing maintenance on ground reading gauge. 3. Maintenance of the ground reading gauge on tanks whose vapor space contains less than 50 ppm H^S may be performed without respiratory equipment. The craftsmen shall stand on the windward side while working. 4. Maintenance of the ground reading gauge on an external floating roof tank may be performed without respiratory equipment. C. Water Draw 1. When working on leaks in the water draw piping system the craftsmen need not wear respiratory equipment if the work area is not confined and natural ventilation occurs. The craftsmen shall stand on the windward side while working. D. Cleaning See Refinery Safety Order S-107. E. Floating Roofs LAM 004298 1. Access to the floating roof on sour tanks is not permitted without a written Fire & Safety Permit. See Section IV-F for respiratory protection requirements. DPMC-10380 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS____________ _ SAFETY S-I15 PAGE 7 OF 8 JUNE 1, 1978 2. In addition, if the floating roof is down more than six feet from the tank shell top, a crane with personnel basket is required for personnel and material access to and.from the roof. F. Manometers I. When a sour tank contains more than 50 ppm ^S in the vapor space and the pressure connection is in the vapor space, a MSA, Type SS-1 canister mask or air supplied respirator shall be worn while performing maintenance on manometers. If the pressure"connection is below the liquid level or the tank contains less than 50 ppm FLS in the vapor space, maintenance may be performed on manometers without breathing equipment. The craftsmen shall stand on the windward side while working. Painting Painting on the roof of sour tanks is not permitted while the tank is in service. Painting of the shell on sour tanks is permitted if the tank is not operating in the forced exhaust mode. A written Safety Permit is required for such maintenance activity. Access to the roof to accomplish painting the shell is not permitted. H. Firewall Entry See Refinery Safety Order S-109. VI. INSPECTION PROCEDURES A. Fixed Roof Tanks 1. Abrasive blasting and/or painting the roof and shell of sour tanks ir service will be permitted provided the procedures in Maintenance General Order-Attachment VI, are followed. 1. Inspection of the roof and roof appurtenances on sour tanks operating in the forced exhaust mode is not permitted. 2. Inspection of the. roof and roof appurtenances on sour tanks in service whose vapor space can contain greater than 50 ppm H^S shall be performed by a minimum of two Inspectors and each shall wear a MSA, Type SS-I, canister mask while performing the inspection. 3. Inspection of the roof and roof appurtenances on sour tanks in service with a vapor space thac contains less than 50 ppm H^S is permitted without breathing equipment. The inspector shall use caution to stand on the windward side when opening vents, gauge hatch, or other appurtenances. B. Floating Roofs 1. Access to Che floating roof on sour tanks is not permitted without a written Fire & Safety Permit. See Section IV-F for respiratory protection requirements. lam 004299 DPMC-10381 PROCEDURES FOR ALL ACTIVITIES INVOLVING SOUR TANKS ______ Updating Responsibility Manager Safety and Industrial Hygiene SAFETY 5-115 PAGE 8 OF 8 JUNE 1, 1978 LAM 004300 DPMC-10382 DPMC-10383 ATTACHMENT I Safety Order N U4 V3 ' V<| </} <*: UjUj ~- U O ! EC C=J w <HH-- Ho*3- < CO V- ^x s -S.k \ Juj & ^u s| 8 C: s>g* 5 cd ^<o M. 8 ^5 <5i * fa Q LAM 004302 DPMC-10384 O AU &e HATCH ' Ovi I \l 1 s51 ^ -5 V1 -- uCJ. V~Ucu-" -OU3 =<Omm *^>mC> -- <o < vi l E* u, vg ^ Ci'-J ^o 5* K, ^ ^ Uj <*: 5* s^ % ^ <3 * *? Cp V3 ^ ^<0 fa I. LAM 004303 VtPh'C- 10385 ATTACHMENT TV SOUR TANKAGE LISTING _AREA TANK NO. TANK NAME TANK TYPE T-XXX Sour Naphtha Internal Floater T-XXX Sour Gasoline Internal Floater T-XXX Sour Gas Oil Fixed Roof A-XXX Sour Crude External Floater VAPOR SPACE NORMALLY CONTAINS <10ppm H^S >10ppm H=S >50ppm X X X ------------NA-- LAM 004304 DPMC-10386 SHELL PEER PARK MANUFACTURING COMPLEX IN-SERVICE BLASTING MAINTENANCE MPAGE 1 OF l MAY 15, 1984 Procedures for In-Service Abrasive Blasting PURPOSE This order establishes the procedures and responsibilities for in-service abrasive blasting and painting. Coordination of the various assigned responsibilities will be the responsibility of the designated Shell Maintenance Representatives. Procedures and responsibilities are defined in the following attachments: Attachment I - Pipe Racks Attachment II - Units Attachment III - Spheres and Pressure Vessels Attachment IV - Non-Sour Fixed Rcof Tanks Attachment V - Non-Sour Floating Roof Tanks Attachment VI - Sour Tanks 42N01 LAM 004305 DPMC-10387 ATTACHMENT I - PIPE RACKS A. Shell Maintenance and Designated Paint Contractor Will 1. Survey pipe racks and piping to classify conditions of existing coatings and identify areas of metal loss. 2. Convey this information to appropriate Shell Maintenance and Operational personnel along with a proposed painting schedule and costs. 3. Schedule a pre-job meeting with operating departments that have permit responsibility for the racks involved. a. Operations Safety, and Inspection to attend. b. Meeting to be held one month before start date. c. Keep Operations informed of planned work schedule. 4. Ensure the item to be blasted and the blasting equipment are properly grounded to eliminate static-electricity build-up. a. Install a common ground between the blast nozzle, blast pot, and the item to be blasted. b. No "alligator clip'1 ground connections are permitted! c. The integrity of the grounding system must be verified with a "clamp-on" ohm meter before blasting is started. I) The resistance between the blast nozzle and the item to be blasted oust measure one ohm or less. a) Anytime the resistance exceeds one ohm, blasting is not permitted until the grounding system is repaired. 5. Immediately notify operating department with permit responsibility of a Leak or emergency occurs during the course of the -job. 6. Orient personnel to product hazards indicated on MSDS sheets. B. Shell Inspection Will 1. Examine all items scheduled to be abrasive blasted and determine if sufficient metal thickness remains to withstand blasting. 2. Provide a written report to Operations, Safety and Maintenance. C. Operation Department With Permit Responsibility Will 1. Be responsible for scheduling a coordination meeting with all operating departments with piping in the racks involved. 4 2 NCI a Inspection will work with Engineering Support to develop the list of operating departments involved. LAM 004306 DPMC-10388 ATTACHMENT I - PIPE ivACKS 2 2. Coordinate the development of communication procedures. a. Operations to Operations - notify line owners and receivers weekly. b. Maintenance to Operations - Maintenance/Paint Contractor will update permits daily. 3. Establish pipe line isolation procedure with all operating departments involved. 4. Notify involved operating departments if a leak or emergency occurs. 3. Make decision and develop an action plan for any leak or emergency. 6. Notify Maintenance/Paint Contractor of all high-risk product lines in the rack; i.e., acid, caustic, benzene, sour products, etc. 7. Write Departmental Work Permit for pipe rack work that does not require abrasive blasting. D. Safety/Operations Will 1. Write Fire and Safety Permit for all abrasive blasting of a section of pipe rack after ensuring the following conditions are met: a. Grounding system's ohm meter reading is one ohm or less (see A.4.). b. Explosive and/or hazardous vapor levels have been monitored. 4 2N01 LAM 004307 DPMC-10389 ATTACHMENT II - UNITS A. Shell Maintenance and Designated Paint Contractor Will 1. Survey the unit to classify conditions of existing coatings and identify areas of metal loss. 2. Convey this information to appropriate. Shell Maintenance and Operational personnel along with a proposed painting schedule and costs. 3. Schedule a pre-job meeting with the operating department involved. a. Operations, Safety, and Inspection to attend. b. Meeting to be held one month before start date. c. Keep Operations informed of planned work schedule. 4. Ensure the item to be blasted and the blasting equipment are pro perly grounded to eliminate static electricity build-up. (See Attachment I, A.4.) 5. Immediately notify Operations if a leak or emergency occurs. 6. Orient personnel to product hazards indicated on MSDS sheets. B. Shell Inspection Will 1. Examine all items scheduled to be abrasive blasted and determine if sufficient metal thickness remains to withstand blasting. 2. Provide a written report to Operations, Safety and Maintenance. G. Operations Will 1. Coordinate the development of communication procedures. a. Operations to Operations - notify line owners and receivers weekly. b. Maintenance to Operations - Maintenance/Paint Contractor wiii update permits daily. 2. Establish line isolation procedure with all operating departments involved. 3. Make decision and develop an action plan for any leak or emergency. 4. Notify Maintenance/Paint Contractor of all high-risk product lines in the rack; i.e., acid, caustic, benzene, sour products, etc. 5. Notify Maintenance/Paint Contractor if a leak or emergency occurs. 6. 42NC1 Write Departmental Work Permit for unit work that does not require abrasive blasting. LAM 004308 DPMC-10390 ATTACHMENT II - UNITS 2 D. Safety/Operations Will 1. Write Fire and Safety Permit for all abrasive blasting of a speci fied section of the unit after ensuring the following conditions are met: a. Grounding system's ohm meter reading is one ohm or less (see Attachment I.A.4.). b. Explosive and/or hazardous vapor levels have been monitored. 42N01 LAM 004309 DPMC-10391 ATTACHMENT III - SPHERES AND PRESSURE VESSELS Shell Maintenance and Designated Paint Contractor Will 1. Survey spheres and pressure vessels to classify conditions of existing coatings and identify areas of metal loss. 2. Convey this information to appropriate. Shell Maintenance and Operational personnel along with a proposed painting scheduLe and costs. 3. Schedule a pre-job meeting with operating departments that have permit responsibility for the spheres and pressure vessels involved. a. Operations, Safety, and Inspection to attend. b. Meeting to be held one month before start date. c. Keep Operations informed of planned work schedule. A. Ensure the item to be blasted and the blasting equipment are properly grounded to eliminate static electricity build-up (see Attachment I.A.A.) 5. Immediately notify Operations if a leak or emergency occurs during the course of the job. 6. Orient personnel to product hazards indicated on MSDS sheets. 7. Not abrasive blast valve bonnets, pressure relief valves or their flanges. Shell Inspection Will 1. Examine all items scheduled to be abrasive blasted and determine if sufficient metal thickness remains to withstand blasting. 2. Provide a written report to Operations, Safety and Maintenance. Operation Department With Permit Responsibility Will 1. Be responsible for scheduling a coordination meeting with all operating departments that pump or receive products into spheres or vessels involved. 2. Coordinate the development of communication procedures. a. Operations to Operations - notify line owners and receivers weekly. b. Maintenance to Operations - Maintenance/Paint Contractor will update permits daily. 3. Notify involved operating departments if a leak or emergency occurs. lam 004310 NO 1 DPMC-10392 ATTACHMENT III - SPHERES AND PRESSURE VESSELS 2 4. Make decision and develop an action plan for any leak or emergency. 5. Notify Mainteuance/Paint Contractor of all high-risk products in spheres or vessel to be blasted; i.e., acid, caustic, benzene, sour products, etc. D. Safety/Operations Will 1. Write Fire and Safety Permit for all abrasive blasting of spheres and pressure vessels after ensuring the following conditions are met: a. Grounding system's ohm meter reading is one ohm or less (see Attachment I.A.4.). b. Explosive and/or hazardous vapor levels have been monitored. LAM 004311 DPMC-10393 /--*v ATTACHMENT IV - NON-SOUR FIXED ROOF TANKS A. Shell Maintenance and Designated Paint Contractor Will A Survey tanks to classify conditions of existing coatings and identify areas of metal loss. Oi- Convey this information to appropriate Shell Maintenance and Operational personnel along with a proposed painting schedule and costs. 3. Schedule a pre-job meeting with operating departments that have permit responsibility for the tanks involved, a. Operations, Safety, and Inspection to attend. b. Meeting to be held one month before start date. c. Keep Operations informed of planned work schedule. U. Ensure the item to be blasted and the blasting equipment are properly grounded to eliminate static electricity build-up (see Attachment I.A.4.). 5. Immediately notify Operations if a leak or emergency occurs. 6. Orient personnel to product hazards indicated on MSDS sheets. 7. Ensure fire extinguishers are readily available. B. Shell Inspection Will 1. Examine ail items scheduled to be abrasive blasted and determine If sufficient metal thickness remains to withstand blasting. l. Provide a written report to Operations, Safety and Maintenance. C. Operation Department With Permit Responsibility Will 1. Be responsible for scheduling a coordination meeting with all operating departments that pump or receive products into the tank involved. A. Coordinate the development of communication procedures. a. Operations to Operations - notify line owners and receivers weekly. b. Maintenance to Operations - Maintenance/Paint Contractor will update permits daily. 3. Establish "static tank" procedures with all Operations and' Maintenance personnel involved. ilNCl a. Hold the tank static by closing, tagging and locking all valves. LAM 004312 DPMC-10394 ATTACHMENT TV - NON-SOUR FIXED ROOF TANKS T b. Seal off all openings and all gauge hatches except for one which must have 10' vent stack equipped with a tee on top, installed to enable the tank to "breathe", D. Safety/Operations Will 1. Write Fire and Safety Permit for all abrasive blasting after ensur ing the following conditions are met: a. Grounding system's ohm meter reading i3 one ohm or less (see Attachment I.A.4.). b. Explosive and/or hazardous vapor levels have been monitored. 42N0 ] LAM 004313 DPMC-10395 ATTACHMENT V - NON-SOUR FLOATING ROOF TANKS Due to the inherent nacure of floating roof tanks and the increased hazard possibilities that may be encountered, the following responsibilities must be met before blasting is started and during the course of the job: A. Shell Maintenance and Designated Paint Contractor Will 1. Survey tanks to classify conditions of existing coatings and identify areas of metal loss. 2. Convey this information to appropriate Shell Maintenance and Opera tional personnel along with a proposed painting schedule and costs. 3. Schedule a pre-job meeting with operating departments that have permit responsibility for the tanks involved. a. Operations, Safety, and Inspection to attend. b. Meeting to be held one month before start date. c. Keep Operations informed of planned work schedule. B. Operation Department With Permit Responsibility Will 1. Be responsible for scheduling a coordination meeting with all operating departments that pump or receive products into the tank involved. 2. Coordinate the development of communication procedures. a. Operations to Operations - notify line owners and receivers weekly. b. Maintenance to Operations - Maintenance/Pa.int Contractor will update permits daily. 3. Establish "static tank" procedures with all Operations and Mainte nance personnel, involved. 4. Notify involved operating departments if a leak or emergency occurs. 5. Make decision and develop an action plan for any leak or emergency. 6. Notify Maintenance/Paint Contractor of all high-risk products in tanks to be blasted, i.e., acid, caustic, benzene, sour products, etc. 7. High-gauge tank roof and hold the tank static by closing, tagging and locking all valves. C. Safety/Operations/inspection Will 1. Inspect roof for combustible materials, hazardous fumes, and visually inspect roof pontoons for lock-;. LAM 004314 DPMC-10396 ATTACHMENT V - NON-SOUR FLOATING ROOF TANKS *} 2. Determine respiratory requirements, if any, to permit Paint Contractor to seal off all tank openings. D. Shell Inspection Will 1. Examine all items scheduled to be blasted and determine if suffi cient metal thickness remains to withstand sandblasting and support the associated roof load requirements. 2. Inspect and ensure all seals are in good condition. 3. Provide a written report to Operations, Safety and Maintenance. E. Permitting Operation Department Will 1. Issue Departmental Work Permit to Maintenance/Paint Contractor to ground the tank (see F.2.) and-seal off all tank openings. F. Maintenance/Paint Contractor Will 1. Seal off all tank openings to prevent: a. Unsafe escape of combustible material or hazardous fumes. b. Contamination of the tank's product, roof seal, or roof drain by blasting material during the course of the job. 1) The roof drain must be plugged before work is started and the plug removed at the end of each work day to allow the roof to drain in case of rain. 2. Ensure the tank and blasting equipment is properly grounded to eliminate static electricity build-up. a. Install a common ground between the blast nozzle, blast pot, and the tank shell. b. In order to properly ground floating roof tanks, the roof must be grounded to the shell, the top of the roof ladder must be grounded to the shell, and the bottom of the roof ladder must be grounded to the roof. c. No "alligator clip" ground connections are permitted! d. The integrity of the grounding must be verified with an "clampon" ohm meter before blasting is started. 1) The resistance between the blast nozzle and the item to be blasted must measure one olnr. or less. UNO I tAW 004315 DPMC-10397 ATTACHMENT V - NON'-SOUR FLOATING ROOF TANKS j a) Anytime the resistance measurement exceeds one ohm, the blasting must immediately be stopped and the grounding system repaired before blasting car. be resumed. e. Immediately notify Operations if a leak or emergency occurs. G. Operations/Safety Will 1. Write Fire and Safety Permit for all sandblasting after ensuring the following conditions are met: a. Grounding system's ohm meter reading is one ohm or less (see F.2.). b. A means of access to the tank roof is in place tq. be used by painters during the course of the job. c. The roof ladder has been decked to be utilized as an emergency escape ramp. d. Explosive and/or hazardous vapor levels have been monitored and respiratory requirements, if any, have been established and met. (includes monitoring roof pontoons, roof seal, and sealed openings). 1) Monitoring by Shell personnel will be done prior to issuing or redating tne Fire and Safety Permit. a) Additionally, the Shell Maintenance Representative and the Paint Contractor Coordinator will monitor the job after lunch. L. On-going continual monitoring by contractorsupplied "badges", if required. e. Operations Departmental Order pertaining to tanks in a common fire wall is met. f. The bulk of the previous day's blast material has been removed from the roof. g. Fire extinguisher is readily available on the roof arid the "no smoking" rule is in effect. LAM 004316 DPMC-10398 ATTACHMENT VI - SOUR TANKS In addition to the procedural requirements specified in Attachment IV - Non-Sour Fixed Roof Tanks, and Attachment V - Non-Sour floating Roof Tanks, the following requirements must be met in order to work on sour tanks: A. Shell Maintenance and Paint Contractor Will 1. Require blaster to wear a NIUSH approved blasting hood that has been: a. Supplied compressor breathing air according to Shell stands rds. b. Equipped with a back-up system consisting of two (2) air bottles secured to a portable rack and attached to the breathing air system as follows: 1) A check-valve installed on the hood-side of the breathing air filter. 2) A "quick-opening" ball-valve installed on the outlet side of the bottle air regulator. 3) The bottle air line "tied" into the hood-side of the air-filter check-valve. h) Bottled air system is pressurized and regulated to the "quick-opening" ball-valve. 2. Require Standby Man and roof-painters to wear a half-lace, pressure-demand, low pressure air-line Scott d022-bG-03 respirator. 3. Require breathing air equipment to be worn and checked-out before ascending tank and must never be removed until tank has been descended. a. Breathing air lines for roof personnel must be tieu-off to tinshell-ladder platform. Require standby man to have a Scott Air Pak readily available for rescue. Complete Air Pak to be sealed in plastic for protection from blasting material. A 2 KOI LAM 004317 DPMC-10399