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ETHYL CORPORATION INTER-OFFICE To C. B. Hunt Address Houston Plant From R. N. Matherne Industrial<^urvey of October 16-18, 1985 Subject Address BRT Date November 21, 1985 Attached is the industrial hygiene report from the survey conducted on October 16-18, 1985. This survey was conducted in the aluminum powdering and Aluminum alkyl blending area. R. N. Matherne ' RNM:bto Attachment cc: W. F. Gafford L. J. Holloway D. E. Johnson/G. L. Ter Haar R. L. Mack P. J. Sanders W. D. Taylor L; J. Vaughn File: Pasadena - A1 Alkyls ETH 002416 1 Introduction and Summary I. conducted a survey of the aluminum powdering and/aluminum alkyl blending area. Personal monitoring was conducted: for exposure\to noise and aluminum powder. The noise expc/sures of the aluminum powdering operators, as expected, exceeded the OSHA limit\of 90 dB (A) averaged over 8 hours. The Aluminum powder (dusr.) exposure was well below the recommenced exposure limit (TLV) of 10 mg/M^. Recommendation^ Apply heat shielding material around/the exhaust vent from, the newer furnace. Consider insulating the small break room near the furnaces for noise so*. that the operators /an use that room to get away from noise exposures as wejtl as heat exposure. Comments and Discussion Heat Because of the heat levels ne/r the furnace, the operators work one hour near the furna< and one hour away from the fur- nace, usually in the lunch (b: sale) room. In addition, a portable air conditioned break room was installed near the two furnaces so that the operator take a break from the heat and still watch the furnace. I noted radiant heat cofning fkom the vent for the newer furnace. Shielding was placed on oVe side of the vent to protect electrical wiring/ It was obvious to me from standing on both sides of the exhaust vent that the shielded side pro duced much less radiant iieat than the Vnshielded side. Shielding applied around the open areas, of the vent should reduce the heat load tp the~employees t!\at work in that area. Noise of the aluminum powdering operators (A) averaged over 13 hours (see nace area noise lev\al, when it is 109 dB(A) (see Diagraim, A) . The operaer day in the furnace, area. It should .e break room installed near the furnace >r the operators has noVse levels inside : is recommended that the operators protection when they ar^ in this ither option is to better\insulate the tduce potential exposures yhile in >ears to be entering through cracks rough the large plexiglass window. >ise levels below 85 dB(A), and pre:hey could use the room to lower their ETH 002417 2 Hearing protection is worn anytime anyone enters the aluminum powdering building. Hearing protection is not required however in the lunch room and tool room. I evaluated the aluminum alkyl blending operator for noise exposure. His exposure on two different days was below 80 aB (A) averaged over 8 hours. No hearing portection is worn. Aluminum Powder I evaluated the operator's potential exposures to aluminum powder. I found that the operator was exposed to no detectable level {<0.2 mg/M3) of aluminum powder. A stationary sample, placed in the furnace area, showed about 2 mg/M3. The exposure limit for aluminum powder is 10 mg/M3. ETH 002418 TABLE I Pasadena, TX \ \ Personal Noise Monitoring Aluminum Powdering Date Name/SS# Job 10/17/85 Bill Hurry 462-44-^611 Aluminum / 409 Powder inc/ 10/17/85 Will FiegLi^r Aluminum 450-5 6^-6 005\ Powdering 409 10/18/85 Sam Baker 460-84-9690 >AlunD.num /dering 320 Wearing Hearing Protection Yes Yes Yes Alkyl Blending 10/17/85 Clyde P. Sells Blending 464-72-293/ Operators; 420 10/18/85 Louis Saliifzar Blending \ 320 451-72-/862 Operator No No 8 hr. ' TWA dB (A) 98 94 93 <80 <80 OSHA Permiss4i)le Exposure Limit - 90 dB^A) averaged for 8 hours. Monitoring Method - Quest Noise Dosimeter\ Monitoring performed by R. N. Matherne \ / / ETH 002419 TABLE II Pasadena, TX Dust Monitoring - Aluminum Powdering Date 10/18/85 10/18/85 Name/SS# Norman Green 461-40-1074 Area Sample Job Time (Min.) Aluminum Powdering 304 Near Furnace 209 Total Dust ND 1.7 mg./M3 ACGIH TLV 10 mg/M3 ND - None Detected; minimum detectable level is 0-2 mg/MJ Monitoring perfomed by R. N. Matherne Monitoring Method: Matched weight filter cassette, high flow pump. ETH 002420 a o H* CO CD tr* > CO M <C CD a 3 I--* 0 H- CO l-> F- 3 a owe F- 2 ^ CD 3 3 CO H1 iQ so CO *3 *3 n ( CO 1-1 0 SO c co O 3 tl yi f> a CO H- CD > o. F* H (0 F- 3 3 u3 Q a > ETH 002421