Document dpKJY8YQv4j2QVa26kMZ2jY9

Pennsylvania Glass Sand Corporation Three Penn Center Pittsburgh, Pa. 15235 Telephone: (412) 243-75QQ August 27,1976 Mr. Kenneth Clifton Mgr. of Tyler Pipe Industries, Inc. P. 0 . Box 2027 Purchases PLAINTIFFS I EXHIBIT Tyler., Texas 75701 Dear Mr. Clifton: The U.S. Occupational Safety and Health I TPI-76 Administration (OSHA) recently published recommended "Guidelines for Control of Occupational Exposure to Crys talline Silica-and Abrasive Blasting" and has distributed copies of the voluntary guidelines to many employers using silica. As a service to you, we are enclosing a copy of the OSHA voluntary guidelines and their transmittal letter in the event they did not include you on the mailing list. Also enclosed is a copy of a com pleted OSHA Material Safety Data Sheet (Form OSHA-20) covering silica products which has previously been furnished on request to our customers. This data sheet covers all silica products being shipped to your account. As you know, OSHA has had under study since the fall of 1974 the National Institute for Occupational Safety and Health (NIOSH) Criteria for a Recommended Standard on Occupational Exposure to Crystalline Silica. Certainly we all agree with the last paragraph of the enclosed OSHA transmittal letter that protection of employees from overexposure to silica is a common goal: however, that is not _to say that we are in agreement with all of the recommendations con tained in either the NIOSH criteria document or the OSHA voluntary guidelines. ' We thought you would also be interested in the enclosed National Indus trial Sand Association letters of March 26 and August 19, 1975 to OSHA and August 17, 1976 to NIOSH which illustrates industry's recognition of the problem and position on the NIOSH criteria for recommended standards. If you have any comments on either the OSHA voluntary guidelines or the NIOSH criteria document you should, if you have not already done so, promptly convey your comments to NIOSH and OSHA. We trust that the enclosed information will be of assistance to you. Very truly yours, PENNSYLVANIA GLASS SAND CORPORATION Jfames B. Frysinge Senior Vice Pres JBF:gj d Enclosures 000587 PLANTS S(Rf,(llY SPAtHQS w V4 . SPADr JlXAS COLUMBIA. S C OUSOCf ON/O ALQNOtXf MO MAPUTO*. PA mill c*ft*. oxla . n(wpo*t n j . ocHiGCxNtc. ga. pacific, mo phalanx onio . ou/ncy pla . uuca. pa Dear Sir: The nature of work at your establishment indicates to the Occupational Safety and Health Administration (OSHA) that crystalline silica may be used in your manufacturing process. As you know, the present permissible exposure limit to silica.depends on the percent of crystalline silica and is expressed as a timeweighted average concentration for an 8-hour period. If the employee exposure is found to be in excess of the permissible limits, you must implement feasible engineering or administrative controls or maintain an effective respiratory protection program should such controls be found infeasible. The National Institute for Occupational Safety and Health has recommended that the permis sible exposure limit for silica be lowered to .05 ng/M.3, as determined by a full-shift sample up to a 10-hour working day, 40-hour work week. This recom mendation is currently being considered by OSHA. As an interim measure until such time as a complete standard is promulgated we are forwarding herewith recommended guidelines for protection of your employees against the risk of disease resulting from exposure to silica. These recommen dations involve preventive steps of good housekeeping, personal hygiene, medical surveillance, monitoring and measuring of exposure levels, employee training, respirator'information and abrasive blasting work practices which should ensure a reduced health risk for those of your employees who are involved in such manu facturing processes. The issuance of these guidelines does not alter our intention to continue our compliance activities at your establishment. The wide use and multiple applications of silica in our nation's industries com bine to make silica a major occupational health hazard. Therefore ,jro.' ur.tary compliance with the enclosed nonmandatory guidelines would further the overall objective of the Occupational Safety and Health Act - to assure so far as possible, safe and healthful working conditions. / Your cooperation in this matter is greatly appreciated. Protection of your employees from overexposure to silica is, I am confident,.our common goal. Deputy Assistant Secretary 000588 * Guidelines for Control of Occupational!! Sxtaasag^ to Crystalline Silica and Abrasive 3lLasti-nq In accordance with the Occupational Safety and Health; /arhrdnsuS2iticm"5 '(D3HA) standard for air contaminants {29 CFR 1910.1000), enqilumyriE ssKpctsuru- to air borne crystalline silica shall not exceed an 8-hour toTne-^wdjgii'tod xur&rag<e limit (variable) as stated in 29 CFR 1910.1000, Table Z-3* car aa liana! ss.t. iby a state agency whenever a state-administered Occupational Saietaj' atnd Stealth* is in effect. The first mandatory requirement is that employer aissmsan.*: itoe: ejlianioaxed through the implementation of feasible engineering rmitoEiLx.. SftJtoer all such controls are implemented and they do not control to tthtE pernciarsihl): swpasorc limit, each employer must rotate its employees to tStt sssitaasfc pnarsihxl in order to reduce exposure. Only when all engineering or agtefiraa&aat'jsa- osnstrols have been implemented, -and the level of respirable silica stall -KKceicfs permissible exposure limits, -may an employer rely on a' respiratrr. pranranu purs;u<rrt to the mandatory requirements of 1910.134. Generally wher'-wcc-kinip aand&aiicaTK or other practices constitute recognized hazards likely to ssmaa: dasrilhi cue serious physical harm, they must be corrected pursuant to Stoicism KUiaaf fl-be Occupational Safety and Health Act. In addition to these mandatory requirements, tie? 3actionso Zcmttitn'ta of Occupational Safety and Health has recommended that the' lLu.mil. h icuveuesl to 0.05 mg/M^, as determined by a full-shift sample up to a UlHlroir weirki.TisT <day, 40-hour work week. This recommendation is currently ibeitin Trorniitltoeeti ibr GSH.A. Pending such consideration, the following recommendKizams xmr medte to eeras.icre that employee exposure to respirable silica is contrailx-ftd to ahu? majrmissiiljln* exposure limit. For these guidelines, silica means auzyattolllLiinti? sdl.ica- 1. MONITORING a. Each employer who has a place of employment im wftiiiriti snlilriit iis 'Xxccnpa-- tionally produced, reacted, released, packager! ziKpaxikagzriS,, aaamspoi ted, stored, handled, or used should inspect each wtokplurcrir aitS -.vork aapEratior. to determine if any employee may be exposed to si'.lnCT. .art. aitorr the permissible exposure limits. Indicators that ani tercalfxta-tam, cud: (employee exposure should be undertaken would include: (i) Any information or observations which wnaldi q-nflamtitg- KntpBtETyee exposure to silica or other substances,-; fii) Any measurement of airborne silica; (iii) Any employee complaints of symptoms whjchi muiy toe aitttorribicif.able to exposure to silica or other substances,-; (iv) Any production, process; or control, charm wittuiihr .-may zersult in an increase in the airborne concentration off saiatna,, asc wrhnmmwer the employer has any other reason to susperx an; intcr-tocse; a.T f)he air borne concentrations of silica. b. Air Monitoring (i) Employee exposure measurements should Tcg'rrasrn'tt f-br aurtoal breathing zone exposure conditions for each employer. Avny .apmarcFTdate 000583 -i- combination of long-term or short-term respirable samples wouiv. be acceptable, but total sampling time may not.be less than 7 hours. In case of abrasive blasting operations, substances \ other than silica should be sampled and analyzed. / '(ii) Accuracy of Measurement. The method of monitoring and analysis should have an accuracy of not less than plus or minus 251 for concentrations of airborne silica equal to or greater than the permissible exposure limit. (One method meeting this accuracy requirement is available in the "NIOSH Manual of Analytical Methods," Government Printing Office Stock No. 1733-00041). (iii) Frequency of Monitoring. Where the employer has determined that employees are exposed to silica or other substances in excess of the permissible exposure limit, monitoring should be repeated quarterly. 2. MEDICAL SURVEILLANCE Each employer should institute a medical surveillance program for all employees who are or will be exposed to airborne concentrations of silica or other substances above the permissible exposure limit. The employer should provide each employee with an opportunity for a medical examination performed by or under the supervision of a licensed physician and should be provided during the. employee's normal working hours without cost to the employee. a. Medical Examination (i) Each employer should provide a medical examination which includes a complete medical'history and physical examination, an annual chest roentgenogram (x-ray) and pulmonary function tests to each employee exposed to silica in excess of the permissible exposure limits. In the abrasive blasting trade, attention should be paid to potential scarring of cornea. (a) A chest roentgenogram (posteroanterior 14" by 17" or. 14" by 14") classified according to the 1971 ILO International Classifica tion of Radiographs of Pneumoconioses. [ILO U/C International Classification of Radiographs of Pneumoconioses 1971, Occupational Safety and Health Series 22 (rev). Geneva, Iftter- national Labor Office, 1972). (b) Pulmonary function tests including forced vital capacity (FVC) and forced expiratory volume at one second (FEV 1) to provide a baseline fpr evaluation of pulmonary function and to help determine the advisability of the workers using negative- or positive-presspre respirators. It is recognized that providing . ` such medical examination and record keeping of medical data may be difficult for those abrasive blasting establishments employing transient workers. (ii) Medical examinations should also be made available: (a) To employees prior to their assignment to areas in which airborne concentrations of silica are above the permissible exposure limit; (b) At least annually for each employee exposed to airborne con centrations of silica above the permissible exposure limit at any time during the preceding six months; (c) Immediately, upon notification by the employee that the employee has developed signs or symptoms commonly associated with chronic exposure to silica. (iii) Where medical examinations are performed, the employer should provide the examining physician with the following information: (a) The reason for the medical examination requested; (b) A description of the affedted employee's duties as they relate to the employee's exposure; (c) A description of any personal protective equipment used or to be used; (d) The results of the employee's exposure measurements, if available; (e) The employee's anticipated or estimated exposure level; (f) Upon request of the physician, information concerning previous medical examination of the affected employee. b. Physician's Written Opinion (i) The employer should obtain and furnish the employee with a written opinion from the examining physician containing the following: (a) The signs or symptoms of silica exposure manifested by the employee, if any; (b) A report on the findings of the chest roentgenogram and pulmonary function tests; (c) The physician's opinion as to whether the employee has any detected medical condition which would place the employee at increased risk of material impairment to the employee's health from exposure to silica or other substances or would directly or indirectly aggravate any detected medical condition; (d) Any recommended limitation upon the employee's exposure to silica or other substances or upon the use of personal pro tective equipment and respirators; and (e) A statement that the employee has been informed by the physician of any medical condition which requires further examination or treatment. (ii) The written opinion obtained by the employer should not reveal specific findings or diagnoses unrelated to occupational exposure to silica or other substances. (iii) If the employer determines, on the basis of the physician's written opinion, that any employee's health would be materially impaired by maintaining the existing exposure to silica or other substances, 000530 . the employer should place specific limitations, based on the physician's written opinion, on the employee's continued exposure to silica or other substances. 3. TRAINING a. Each employee who may be potentially exposed to silica or other substances should be apprised at the beginning of his or her employment or assign ment to such an exposure area of the hazards, relevant symptoms, appro priate emergency procedures, and proper conditions and precautions for safe use or exposure. b. Instruct affected employees to advise the employer of the development of the signs and symptoms of prolonged exposure to silica and other substances. c. Inform employees of the specific nature of operations which could result in exposure to"silica or other substances above the permissible exposure limits, as well as safe pork practices for the handling, use, or release of the silica and the types and function of engineering controls. d. Instruct employees in proper housekeeping practices. e. Instruct employees as to the purpose, proper use, and limitations of respirators. f. Provide employees with a description of, and explain the purposes for, the medical surveillance program. g. Inform employees where written procedures and health information are available on the premises. h. Advise employees of the increased risk of impaired health due to the combination of smoking and silica dust exposure. 4. PERSONAL PROTECTIVE DEVICES a. Personal-Protective Devices Program. Engineering controls shall be used to maintain silica dust exposures below the prescribed limit. When the limits of exposure to silica cannot be met by limiting the concentrations of silica in the work environment by engineering and administrative controls, an employer must utilize a program of respiratory protection to protect every employee exposed. * b. Respirator Selection and Usage (i) The employer should select and provide an appropriate respirator from the table on the next page. When abrasive blasting is done, the type C supplied-air, positive pressure, demand type abrasive blasting respirator shall be worn according to 29 CER 1910.94(a) and 30 CFR Part 11. (ii) Employees experiencing frequent and continuous breathing diffi culty while using respirators should be evaluated by a physician to determine the ability of the worker to wear a respirator. (iii) A respiratory protective program meeting the requirements of 29 CER 1910.134 shall be established and enforced by the employer, (iv) A respirator specified for use in higher concentrations of air borne silica may be used in atmospheres of lower concentrations. -4- Recommendations for Respirator Usage at Airborne Silica Concentrations Above the Permissible Exposure Limit Concentrations of ' Airborne Silica in Multiples of the Standard Less than or equal to 5x Less than or equal to lOx : Less than or equal to lOOx Less than or equal to 200x Greater than 200x Respirator Type* Single use (valveless type) dust respirator. Quarter or half mask respirator with replaceable dust filter or single use valve) dust respirator. (with Type C, demand type (negative pressure), with quarter or half mask facepiece. Full faceplate respirator with replaceable dust filter. Type C, supplied-air respirator, demand type (negative pressure), with full facepiece. Powered air-purifying (positive pressure) respirator, with replaceable applicable filter.** Type C, supplied-air respirator, continuous flow type (positive pressure), with full facepiece, hood, or helmet. Where a variance has been obtained for abrasive blasting with silica -sand use only Type C continuous flow, supplied air respirator with hood or helmet. An alternative is to select the standard high efficiency filter which must be at least 99-97% efficient against 0.3 ym dioctyl phtbalate (DOP). 0005131 -5- (v) Employees shall be given instructions on the use of respirators assigned to them, on cleaning respirators, and on testing for leakage. (vi) When employees are exposed to other toxic substances in addition to silica, appropriate combinations of respiratory protection shall be provided. c. Only those respiratory protection devices shall be used which have a "Tested and Certified" number issued by the National Institute of Occupational Safety and Health to the manufacturer of the device.. d. There should be an established in-plant procedure and means and facilities - provided to issue respiratory protective equipment, to return used contaminated equipment, to decontaminate and disinfect the equipment, and to repair or exchange damaged equipment. Record keeping of these activities is mandatory. 5. PROTECTIVE CLOTHING Where exposure to airborne silica or other substances is above the permis sible exposure limit, work clothing should be vacuumed before removal unless it is wet. Clothes should not be cleaned by blowing or shaking. 6. HOUSEKEEPING a. All exposed surfaces should be maintained free of accumulation of silica dust, which, if dispersed, would result in airborne concentrations in excess of the permissible exposure limit. b. Dry sweeping and the use of compressed air for the cleaning of floors and other surfaces should be prohibited. If vacuuming is used the exhaust a-ir.should be properly filtered to prevent generation of airborne respirable silica concentrations. Gentle washdown of surfaces is preferable if practical. c. Emphasis should be placed upon preventive maintenance and repair of equipment, proper storage of dust producing materials, and collection of dusts containing silica. Sanitation shall meet the requirements of 29 CFR 1910.141. 7. PERSONAL HYGIENE FACILITIES AND PRACTICES a. All food, beverages,, tobacco products, nonfood chewing products, and unapplied cosmetics should be discouraged in work areas. b. Employers shall provide an adequate number of lavatories, maintained and provided with soap and towels. c. Where employees wear protective clothing or equipment, or both, in-plant change rooms should be provided in acccrcar.ce with 1910.141(e). 8. ENGINEERING CONTROLS a. Dust Suppression. Moisture, mists, fogs, etc., should be added where such addition can substantially reduce the exposure to airborne respirable silica dust. b. Ventilation. Where a local exhaust ventilation and collection system is used in a building, it should be designed and maintained to prevent the accumulation or recirculation of airborne silica dust into the work place. The system should be inspected periodically. Adequate measures should be taken to ensure that any discharge will not produce health hazards to the outside environment. c. Additional Control Measures. When mobile equipment is operated in areas of potential silica exposure, engineering controls should be provided to protect the operator from such exposure. 9. ITINERANT WORK a. When employees are exposed to airborne silica at temporary work sites away from the plant, emphasis should be placed on respiratory protection, protective clothing, portable engineering controls, and provisions for personal hygiene and sanitation. Training of employees should be provided to protect them as well as others from airborne silica' dust exposure to the extent practical. 10. ABRASIVE BLASTING a. Introduction (i) Consult standards listed in 29 CFR 1910.94(a). (ii) The nature of dust generated in any abrasive blasting process is the combination of the fragmentation of blasting media and the material dislodged from the surface treated. Where fragmentable abrasives such as sand, shells, alumina, glass bead or metal shot is used, or where a fragmentable surface such as sand casting a painted or scaly surface, or masonry is blasted, the airborne dust generated will vary in particle site and chemical composition Noise associated with abrasive blasting operations is also a significant hazard. Heat stress may also be a potential hazard. (iii) Engineering controls for noise and dust should be considered even if they cannot reduce the exposures to permissible exposure limits but will significantly reduce noise and dust exposure to the employees. (iv) Maximum respiratory protection should be provided when silica sand is used as the abrasive agent, or sand castings are cleaned by blasting. (v) All production and control systems used in a stationary abrasive blasting process should be designed or maintained to prevent escape of airborne dust or aerosols in the work environment and to assure control of the abrasive agents. 000592 b. General (i) Selection and maintenance of protective equipment. (a) Refer to the table on page 5 to select appropriate respiratory protective equipment. (b) Air-supplied helmets, ricochet hoods, dust respirators, ear muffs and safety glasses should be an individual issue item, identified with and used by one employee only. Such equipment should be reissued to another employee only after complete cleaning, repair and decontamination. (c) Means should be provided to vacuum, clean and store air supplied respiratory equipment after each shift of use. Storage should be in a clean enclosure such as locker, footlocker, or plastic container. The employees should be trained to maintain the issued equipment in clean condition for his own protection. (d) Replacement of prescription or piano safety glasses should be made if multiple pitting or etching is visible in the center of-the lenses. (e) Replacement of faceplates in air-supplied helmets, ricochet hoods, or full face masks should take place when a side-on light source produces obscuring visible reflections and glare from the etched spots and pit holes in the faceplate. Mylar coating, or similar transparent plastic material, is recommended to protect the glass or plastic faceplate. (f) Length of air hose may not be altered from the manufacturer's specifications. (g) The condition of protective equipment should be checked daily by the employee.' Rips, tears, and openings which expose skin to abrasive agents, should be mended. Functional tests for leaks, proper respiration, and good connections should be " performed on the complete air supply system. (ii) Air supply - portable. (a) The breathable air supplied to the helmet or ricochet hood should be drawn from an oil and carbon monoxide free air compressor. In itinerant work, it should be located upwind from the main air compressor to prevent entry of combustion gases into breathable air. (b) Breathable air supply system should be equipped, if possible, with audible alarm at the helmet or hood to warn the user of low air pressure. (iii) Hearing protection. Suitable hearing protection, providing at least 20 dBA reduction in noise level experienced, should be worn inside the helmet or ricochet hood unless hearing protection is an integral part of such helmet or hood. (iv) Heat stress. Cooling of breathable air, supplied to the blastinq helmets or ricochet hoods, should be considered depending on season and exposure of the employee to heat sources. -8- c. Work Practices (i) Indoors blasting cabinets and glove boxes. (a) Negative pressure should be maintained inside during blasting. (b) The enclosure should be as complete as practical. (c) When the inside of the blasting cabinet is cleaned, respiratory protection should be utilized. (d) If blasting creates excessive noise, a change of nozzle configuration or application of noise control materials to the enclosure should be considered. (e) Cabinets should be maintained in good repair including the presence of gaskets. (ii) In-plant blasting rooms. .(a)- Negative pressure should'be maintained inside during blasting. The room should have exhaust capacity of one air change per minute. (b) Minimum recommended protective equipment of an abrasive blaster working inside a blasting room, in the open, in enclosed space, or outdoors is: safety boots or tee guards; durable coveralls, closeable at wrists, ankles and other openings to prevent entry of abrasive dust and rubbing of such; respiratory, eye, and hearing protection; and gauntlet gloves. (c) If abrasive blasting is automated, the room should not be entered before at least six air changes have occurred, as respirable-size dust particles stay airborne for a consider able length of time. ~fd) In the room, a.cleanup method other than broom sweeping or compressed air blowing should be used to collect the abrasive agent after blasting (e.g. vacuum cleaning). If the blasting agent is removed manually, respiratory protection should be used'. (iii) In-plant work area. (a) If occasional but regular abrasive blasting must be performed inside a building without enclosures, respiratory protection should be provided for all employees in the area. Portable engineering control devices should be used at the location to . collect all of the used abrasive agent as it is applied. (b) When airborne abrasive blasting dust becomes sufficiently heavy in an area to cause a temporary safety hazard by reduced visibility, or a marked discomfort to the unprotected employees not engaged in abrasive blasting, such operations in the affected area should be discontinued until the airborne dust is removed by exhaust ventilation and the settled dust has been removed from the horizontal surfaces in the area. If such operations have to continue, appropriate respiratory protection should be provided to those employees remaining in the area, provided visibility is adequate. (c) If wet blasting is employed, airborne dust hazard may exist after evaporation of water. 000503 _Q_ (iv) Confined space. A confined space is a compartment or tank or similar enclosed space in which abrasive blasting, or a pre existing atmosphere, may cause the employee to be overcome by conditions hazardous to life and where egress may be difficult if normal body functions are impaired. (a) Before starting work, open all access hatches, trap doors, etc., to aid natural ventilation. Mechanical ventilation should, be used, picking up air at the furthest point away from the opening if natural ventilation will not cause a complete air change. Consider the other potentially hazardous materials present, such as solvents, crusts of chemicals, or old paint, with regard to explosion or fire potential when blasted. (b) A "buddy system" should be used - for each employee inside a confined space, another employee should be available to assist in a potential emergency. ' (c) For respiratory protection, a self-contained breathing apparatus or air-supplied hood should be utilized. (d) Adequate lighting that meets the requirements of the National Electrical Code, article 502, should be provided. (e) If the space is mechanically ventilated, means should be pro vided to collect dust before release to the open atmosphere. (v) Outdoors. (a) Blaster should be protected in a manner equivalent to that mentioned in 29 CFR 1910.94(a)(5). (b) The pot man should wear the same protective devices available to the blaster, depending on the distance and wind conditions relative to the blasting location. (c) Prudent care should be_ taken to prevent the dust cloud from spreading to other work areas. (d) Hearing protection and respiratory protection should be available to all other employees in the area if their presence is required. -10- (*) See note below (**) See note below SECTION V - HEALTH HAZARD DATA A^Vpeciiife'a'Int^rlA Standard currently #1910.1000, table Z-3 for silica-.crvstalline*r* rEFr FirEfC/-TTSc OFc /O^ V> iErrR>ErXPOSi iUnRcE Repeated inhalation of respirable dust for extended period of time may . q_ u_a_r.tz. ** cause injury to the lungs. EMERGENCY ANO FIRST AID PROCEDURES None STABILITY UNSTABLE SECTION VI - REACTIVITY DATA CONDITIONS TO AVOID STABLE INCOmpaTability (Materials to avoid) X None HAZARDOUS DECOMPOSITION PROOUCTS HAZARDOUS rCLYME RIZATION MAY OCCUR WILL NOT OCCUR conditions to avoid Xj SECTION VII - SPILL OR LEAK PROCEDURES * (TTEePaS nTOuBpE TAKEN IN by use CASE MATERIAL. IS RELEASED OR of recommended dustless SPILLED methods - water or vacuum - Limit exposure so that itj does not exceed OSHA Standard TLV. WSTE DISPOSAL METHOD, ,, , , Any approved soiig waste disposal method - Limit exposure so that it does not exceed OSHA Standard TLV. SECTION VIII - SPECIAL PROTECTION INFORMATION * RESPIRATORY PROTECTION (Sn`r,fy ryp'> Dust respirator in compliance with OSHA Standard currentlv 29 OFF 1910.134 VENTILATION u?oltawH6^HA Standard special mechanical LGrritrs!) Follow OSHA Standard OTHER PROTECTIVE CLOVES As required EYE PROTECTION As recuired OTHER PROTECTIVE EQUIPMENT As recuired to meet aDDlicable OSHA Standards SECTION IX - SPECIAL PRECAUTIONS * PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING Use dustless systems for handling, storace and clean-up so that ovnngurp r!ni; not exceed OSHA Standard TLV. OTHER PRECAUTIONS. Practice Good Housekeeping; Maintain and test equipment; Suggest posting work areas wheree product is used , handled or stored warning employees that repeated in natation oi respiraoie aus; lor exienaea perioa or time may cause injury to rungs. PACE (2; Form OSHA-20 CPC_9D.S (jJ.T RRK*..MMiiyy 72 * L.ote: Follow OSHA Standards as thev mav presently exist or as hereafter amended, modified, or adopted . See 29'CFR'Part 1310. . Date: August 23 , 19 76 U.S. DEPARTMENT OF LABOR * Occupational Safety and Health Administration MATERIAL SAFETY DATA SHEET Form Aoprov+d OMb No. 44.R13B7 Required under USDL Safety and Health Regulations for Ship Repairing, Shipbuilding, and Shipbreaking (29 CFR 1915. 1916, 1917) SECTION 1 MANUFACTURER'S NAME Pennsylvania Glass Sand Corporation emergency telephone NO. West Virginia 25411 ' CHEMICAL. NAME ANO SYNONYMS Silicon Dioxide (Silica; Chemical family Natural Mineral, extracted from earth TRAtQ NAME ANO SVNONYM5 Silica Products FORMULA Si09 (99.2/- - 99/8*- Free Silica) SECTION II - HAZARDOUS INGREDIENTS PAINTS, PRESERVATIVES. & SOLVENTS pigments None x TLV (Unin) ALLOYS ANO METALLIC COATINGS . base metal. ^Tone CATALYST vehicle solvents aoditives None None None None alloys None metallic coatings None FILLER METAL PLUS COATING OR CORE FLUX others .N. one None others - None HAZARDOUS MIXTURES OF OTHER LIQUIOS. SOLIDS. OR CASES None % TLV (Units) X TLV (Units* , 1 SECTION III - PHYSICAL DATA BOILING POINT (F.) VAPOR PRESSURE (mm H9.) VAPOR DENSITY (AIR-1) SOLUBILITY IN WATER N .A. N.A. N.A. None SPECIFIC GRAVITY (H201) PERCENT. VOLATILE BY VOLUME (*,) evaporation rate ( -1) appearance anoooor Sand - whole grains or flour - No odor SECTION IV - FIRE AND EXPLOSION HAZARD DATA FLASH POINT (Method used) flammable limits EXTINGUISHING MEDIA _ No fire or explosive hazard SPECIAL FIRE FIGHTING PROCEDURES Ll 2.55 None None Uel 1 UNUSUAL. FIRE AND EXPLOSION HAZARDS PAGE (1) (Continued on reverse side) s 000534 Form OSHf R*. M*y 72