Document xjREVjr0kypv0LxM10Qq17ZM1

cc: G . Galingaert R . A . Kshoe 0. E . Kurt R, J. Plunkett H. W. Wheeler ETHYL CORPORATION - BAO?ON ROUGE, LOUISIANA 4ANUFACTURING DEPARTMENT ~ DEVELOPMENT SECTION OUTLINE OF DEVELOPMENT SECTION WORK SINGE THE COMMITTEE MEETING ,,OB' JUKE l',-, 19 A 7 For Discussion at Lead Contamination Advisory Committee Meeting Wilmington, Delaware September 18, 19^7' ANALYTICAL ?4ETKPPS . D? 46-5'TC, Determination of TEL in .Air - A Continuous Recorder The completed design of an Improved Githizons recorder' for field use has been presented in DSM 47-55. The medium quarts spectrograph (basic component of the electronic spectrograph) has been received from Eauoeh and Lomb and construction of the electronic spectrograph icr TEL lead detec tion is In progress art LSU. M 47-lTC, Determination ,,of Lead in Urine Arrangements have been mads with the local Medical Department to collect urine samples for comparative analyses by the routine method and the visual comparator method. On a current trip, Mr. Snyder is stopping .at Kettering Laboratory to develop further plans. SURVEYS DP 46-pTC Air Contaminai;ion_ in T5L Manufacturing Lull dings Measurement of flow rates and lead concentrations in most TEL area exhaust streams has been completed. Work nears completion on the remaining, less Important, streams. In agreement with pre vious reports, the results to date show that the major contamination sources are the main exhausts and copper ducts from the manufacturing buildings and the exhausts from the furnace buildings. About 95$ of the lead discharged to the air comes from these sources. KJT 0012763 :7..770?;: 1945 Survev TLb;Pb/DlyT M.'' r*f-:: Turns 0 Coppe r Duo * %'!` Build inp 91VY; fahoust '1f;nder H ....! ..f.0 h- 1J rir ?.:1ender f ill;or ROOK Exhaust fan k Car Clean--Out; House 5? Pet '*r fas.a UOU30 Hair Exhaust ;'rMf bash House Flit er Room Total .094 up e .02 ,02 .015 .005 \} .004 004 .001 for Area 17 0 a6 84 46 O 0 2 -V .0 178 0 24. 5? 48. ii0 24. T' 13.5 7-S 2.0 2.1 409.3 Assumes rbat each oh of. or four buildings wash cocoes and furnaces contributes the same contaiaination as :;b :;. .ivsrcye of blue buildings. actual total for ores, since duplicating unite were separately ' vaasurve . The 1947 survey ir/ii cateo that less than half as much 'end is being exhausted to the air as in Iffp, V/hile operating " vj housekeeping imprcvemeircs are considered to be the principal ' n.uibcrvors to obis reduced contamination figure. It must be nocognisec. that differencea in the analytic?;.! method used on the carboy nay also contribute. The method used in 1947 is an Improveworn; over that employed in 19to and therefore the results are more dependable. FHOTSCTIVS EQCTIPMSHT PF ;,6"b9'.cC, Impermeable Gloves Tests of Elastomer 105-ccated gloves in the TEL area continue favorable. Supplies of the gloves have been sent to Deepwater* and Detroit for independent evaluation. Meanwhile? two outside companies (Midwest Rubber Company, Detroit, Michigan; Bdraont Manufacturing Company, Coshocton, O h i o ) have submitted pre liminary samples of this type glove for* our evaluation prior to placing an order for test supplies. TEL-penetration tents on elastomer-coated gloves (with portions of fingers continuously submerged in liquid TEL) showed no penetration for 715 h o u r s , A sample taken at 17 hours showed that detectable penetration had begun, and this was confirmed by a sample at 24 hours. The average penetration during the 24 hours was only six micrograms per sq. cm, of exposure area per hour. These? results are in agreement with previously reported K 0052764 bottle-test permeability data on elastomer films. The test con ditions are considered much more severe than conditions of actual use and the results indicate that the elastomer-coated gloves provide ample protection against TEL contamination. . Tests are in progress to select suitable materials for the fabrication of ventilated protective clothing. Tentative specifications for the clothing articles have been submitted to MSA and Hodgman Rubber Company, who will design and fabricate the clothing. DECONTAMINATION I-6-1TC, Decontamination of TEL-in-Air .Streams - Lab.Studies Laboratory tests on the adsorption of TEL by activated charcoal show that no detectable temperature rise occurs when pas sing TEL-saturated air through the charcoal bed under normal conditions. However, when the charcoal is partially saturated v/ith TEL, autoignition occurs if the inlet air stream is heated to approximately 100C. _ Tests to determine whether TEL is adsorbed as such or undergoes a reaction during conVtf*.a ct with charcoal gave some evidence that reaction takes place. Exit air from the scrubber has an odor characteristic of hydrocarbons rather than of TEL. No TEL could be recovered from the charcoal by treatment with steam or vacuum. Analyses of the lead content of the charcoal showed that about two cnircs ox tne weight of material adsorbed was accounted for as metallic lead In order to test the relative performance of various char . samples from various sources were tested for TEL removal capacity and efficiency with results as tabulated. The results show the first three charcoals listed are comparably satisfactory. . . Mean Micrograms Fb/cu.f t . In Effluent from Charcoals Contacting TEL-Air Mixtures at / <P Normal Breathing Rate % Wt. 5 Hours 120 Hours Increase 20,000 Micrograms 80 Micrograms Pb/ Due to TEL Inlet . cu.ft. In Inlet Columbia * GMA CMC All-Service * Sample A** 40 46 18 15 7 4 a 7 200 470 2 5 2 5 17 " A mixture of charcoal with other adsorbents. Experimental sample secured through Dr. Kehoe 4- Air Eainp3.es taken before and after the air filters (oiled. Fiberglass) in the Development Section Laboratory show that the air to the filters contains a maximum of 0.5 microgram of particulate lead per cubic foot and that the filters have a removal efficiency approximating 50$. The amount of particulate lead penetrating the similar filters* in the new laboratory will be much less because the building is further from the TEL area. Furthermore, there will be a reduction of atmospheric contamination at the source when the Pease-Anthony scrubber installation is complete. DP 46-2TC, Removal of Lead Dust from Smelter Plue Gases The Pease-Anthony scrubber continues to operate with a high service factor and satisfactory performance,, Following a series of tests on the unit and several contacts with hr. Anthony, an equipment design was prepared for the new units to be installed on the other furnaces. To provide more efficient dust removal, the new units will be different from the present one in four prin cipal respects: (1) the scrubber will be smaller, f2) the fan will be larger, (3) the size of the scrubber inlet will be fired;, and (4) the entry of dilution air will be minimized by an automatic damper actuated by the furnace draft. This'project is now in the hands of the Engineering and Maintenance Section for preparation of detailed design and preparation of project papers. It is esti mated that the proposed new Pease-Anthony scrubbers will be installed and operating within six to eight months. . GViB/np 9-15-47 KE 0012760