Document q4Ld0r38oZwjp13w2QrgyjnE

SM-JI -MC (REV. 4-79) Shell Oil Company Shell Chemical Company Interoffice Memorandum APRIL 5, 1984 I'l FROM: T. A. ROBERTS TO: P. J. SNYDER SUBJECT: ABRASIVE BLASTING AND THERMAL CUTTING OF LEAD/CHROMATE COATINGS Attached are my comments on the blasting procedure mentioned above. The procedures with North and South are different. I suggest that appropriate parties on both ends get together on this matter and work out differences. Please let me know when you plan to do so. ^.Cl T. A. Roberts TAR/pb Attachments cc: R. R. Erickson J. G. Massey H. C. Holcomb R. B. Snodgrass Lopez ^3 J. E. Hollow4a\Jy- E. E. Drumgoole Maintenance North Fi le LAM 002389 DPMC-08544 iM-32-MC (REV. 4-79) Shell Oil Company Shell Chemical Company Interofflc* Memorandum fc e^D c_>=> MARCH 28, 1984 FROM: SR. INDUSTRIAL HYGIENIST DEER PARK MANUFACTURING COMPLEX TO: MANAGER - CENTRAL MAINTENANCE - MAINTENANCE NORTH DEER PARK MANUFACTURING COMPLEX SUBJECT: ABRASIVE BLASTING & THERMAL CUTTING OF =---------LEAD/CHROMATE COATINGS - " ---------- The attached guideline was prepared in response to a directive from Head Office. It was prepared with the assistance of Bob Lopez and is, I believe, a formalization of existing procedures. Please look this over and let me know if you have any comments. Thanks, Phil Snyder Attachment cc: R.R. Erickson ECB Satellite PJS Chron LAM 002390 DPMC-08545 Page 1 of 6 DPMC INDUSTRIAL HEALTH WORKPRACTICE GUIDELINE FOR INORGANIC LEAD AND/OR CHROMATE EXPOSURE POTENTIAL MARCH 1984 A. Introduction The abrasive blasting of lead/chromate coated surfaces is to be minimized Clk'H)TM .rrtrr inriT.-i'ivvniy rf-"*'- wherever practical. Although lead/*)surface coatings have not been applied on equipment since W?5,maintenance personnel may encounter m5j awd cHor<\Tes since iisz; it in the field. Lead/chromate coatings on equipment and pipeways that m fly Hv Vo 66 have been previously coated with a lead/chromate primerAshould- not ^j//y//S Of/C0/ir/y& C0J/A/r/2>// narmaHy^bc rcimregdi If mechanical damage to the coating occurs, causing AM /,or/)#/>sjX the substrate to start rusting, spot mechamcalvsurface preparation AJfiY & R(Qu,/eO. ~pwij) iiiiill tint ii wm)<iipimi il After surface preparation, a lead/chromate free alumimiw spang1 maatie primer is appli To control inhalation of airborne particulate, coated equipment and pipeways should wH^cv*r possible, be high pressure water blasted instead of abrasive blastedA ^Abrasive blasting of a coated surface should *)?- be done if 33% of the surface has rusted through the coating. New steel should always be abrasive blasted, for mill scale removal and profile. All jobs that can be transported to the blasting yard should be done there. Unless prior' authorization from Health and Safety is obtained, abrasive blasting of storage tanks is to be done with a silica free material. of the cutting line. This 36" abrasive blasted band will reduce airborne particulate and will not damage the remaining coating because of the heat affected zone.' S ,, io I 0AA i V. aaJ j^ `'3 p <^4 fWItJ - 4 DPMC-08546 LAM 002391 Health Hazard Precautions When Abrasive Blasting Or Thermal Cutting Is Performed Page 2 of 6 Repetitive exposure to dust and fume generated by abrasive blasting and thermal cutting of lead/chromate coated surfaces represents a potential health hazard. "Exposure" includes the inhalation of airborne particulate and ingestion of lead/chromate or contaminated substances. Exposure from-the abrasive blasting of lead/chromate surfaces can result in excessive exposure upto 50 feet downwind of the job site. When the abrasive blasting or thermal cutting of such surfaces cannot be avoided the following health and safety guidelines apply. B. Respiratory Protection 1. NIOSH approved air-supplied sandblast hoods are to be used for all abrasive blasting. Ancillary personnel involved in abrasive blasting operations are to wear high efficiency air-purifying respirators. 2. The thermal cutting of coated surfaces (not previouslyblasted) requires the use of air-supplied respirators (low pressure airline type). 3. Respirators are to be cleaned prior to reuse by either the Shell Respirator Center or the contractor. LAM 002392 DPMC-08547 Page 3 of 6 Breathing Air-Supplied by Portable Compressors Compressors are to meet the following minimum requirements: 1. Exhaust stacks off engine to be at least 4 feet high (separation from air intake). 2. Compressor is to be located upwind of work activity. Compressor may have to be relocated if wind changes. 3. A particulate filter is to be maintained in-line between compressor and mask. Periodic filter changing is required. u 4. Measurements for carbon monoxide are to be made at least iwomliMy unless an in-line carbon monoxide analyzer is used. Measurements should be documented and maintain on file for future reference. Protective Work Clothing 1. On days when abrasive blasting or lead burning is performed, clean protective work clothing is to be worn. a. Outer street clothi..-, __ ____ ...... ___ . jjAVtL,iV'.r-jq(i.1 . tyiwj jjrta un.. m -promdmg--they--are---protected by--outer--couera44s--in--ee4 condition. LAM 002393 b. Work shoes may be permitted to be worn providing any out'er^ contamination is removed daily. DPMC-08548 Page 4 of 6 2. Protective work clothing is to be removed at the completion of the work shift. a. Potentially contaminated coveralls are to be disposed of or placed in a closed container and laundered by a qualified outside service. b. Bags or containers of contaminated clothing are to be labeled as being contaminated with inorganic lead and/or chromium dust. E. Hygiene Practices 1. On days when abrasive blasting or burning is performed, employees are to wash at breaks and at the end of the shift. 2. A suitable hand and face washing facility including towels and soap is to be provided and used. 3. Tobacco and food are to be stored away from the potentially contaminated work area. Food or tobacco should not be carried in the pockets of potentially contaminated coveralls. LAM 002394 DPMC-08549 Page 5 of 6 Training 1. All employees engaged in abrasive blasting lead/chromate contaminated equipment are to receive at least annual training. Training shall include: a. The health hazards associated with lead/chromate. b. Possible routes of entry. Ingestion Inhalation c. Proper use of respiratory protection. d. The importance of washing prior to handling foodstuffs. e. Location of air compressor. Exposure Monitoring Shell employees working in the potential exposure zone during the cutting or removal of lead or chromate may have to be monitored. Measured exposure levels exceed the OSHA limit for either lead or water-insoluable hexavalent chromium are required to be reported to Corporate Medical by Industrial Hygiene. Industrial Hygiene should be notified of jobs which are expected to last more than one workshift. LAM 002395 DPMC-08550 Page 6 of 6 H. Contractors Shell is responsible for informing contractors of any potential hazards (of which it is reasonably aware) associated with lead/chromate-based coatings. Contractors are expected to utilize procedures which provide appropriate protection for their employees when involved with application/removal of these coatings. Any requirement of the OSHA Lead Standard that apply to the application/removal of lead-based coatings are the responsibility of the contractor. Upon request. Shell will supply guidance to the contractor in meeting these requirements. I. Environmental Residues from abrasive-blasting of lead/chromate-based coatings will be disposed of on-site; Environmental Operations is to be contacted. PJS3/46 2/29/84 LAM 002396 DPMC-08551