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This article was downloaded by: [University of Montana] On: 5 October 2009 Access details: Access Details: [subscription number 791401753] Publisher Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK American Industrial Hygiene Association Journal Publication details, including instructions for authors and subscription information: http://www.informaworld.com/smpp/title~content=t713608243 Industrial Hygiene Summary Reports Online Publication Date: 01 January 1965 To cite this Article (1965)'Industrial Hygiene Summary Reports',American Industrial Hygiene Association Journal,26:1,95 -- 97 To link to this Article: DOI: 10.1080/00028896509342707 URL: http://dx.doi.org/10.1080/00028896509342707 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.informaworld.com/terms-and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, re-distribution, re-selling, loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material. Industrial Hygiene Summary Reports This Journal welcomes brief comments derived from your daily activities which may be useful to other members of the profession. Address your communications to: R. F. Scherberger, Laboratory of Industrial Medicine, Building 2, Kodak Park Works, Eastman Kodak Company, Rochester, New York 14650. D o w n lo a d e d B y: [U n iv e r s ity o f M o n ta n a ] A t: 2 3 :3 6 5 O c to b e r 2009 Blown Asphalt Not Carcinogenic Previously reported studies have shown that petroleum asphalts, shale oil asphalts, and coal tars exhibit distinct variations in their relative carcinogenicity for experimental ani mals as well as for man. Recent observations reported by Bogovoski indicate that aeration reduced the carcinogenic potency of Esthonian shale oil and prompted the present inves tigation of the carcinogenicity of blown petro leum asphalt. Four materials were applied twice weekly to the clipped necks of C57 black mice from the NIH stock: (1) benzolsoluble extract from natural Trinidad asphalt; (2) crude oil; (3) asphalt with a penetration of 150 to 200 (ASTM method), which is obtained by distillation from the crude oil and is then heated and treated with a stream of blown air to give (4) a highly oxidized "blown" asphalt. The crude oil was applied directly to the animals, but slight acetone dilutions of the other three materials were used. The four materials tested proved to be noncarcinogenic or so weakly carcinogenic to the skin of C57 black mice that they did not elicit any cancers within the normal life span of the species and strain. The carcinogenicity of petroleum asphalts may be reduced by diluting them with natural asphalts or by converting them into blown asphalts. W. C. Hueper, M.D., Chief Environmental Cancer Section National Cancer Institute Public Health Service Bethesda, Maryland 20014 Safe Disposal of Contaminated Sacks Exposure of workers to toxic dusts can occur while paper sacks are being opened and during subsequent handling involved in dis posal. For example, in one operation litharge was dumped and then the empty sacks were piled high in the worker's arms and carried to the rear of the plant where they were burned in a 55-gallon drum. Lead fumes from this operation were observed entering the open plant windows, and a large puddle of lead was later found in the burned-out drum. A unique control system was evolved by inte grating the operation of the hood, the exhaust ventilation, and a gas-fired incinerator. The hood exhaust runs horizontally a short dist ance and has a conveyor belt on the bottom. The empty sacks are placed on the conveyor and fed into the incinerator. The incinerator flue acts as the exhaust duct for the hood. William J. Schreibeis Industrial Hygiene Engineer Industrial Hygiene Foundation 4400 Fifth Avenue Pittsburgh 13, Pennsylvania Piperidine--A Hazardous Chemical On August 17, 1964, a chemical operator engaged in transferring piperidine under room-temperature conditions received unex pectedly severe chemical burns when the ma terial sprayed from the drum. First-degree burns of the face, left ear, and neck, seconddegree bums of the forearms and abdomen, and third-degree burns of the chest developed even though less than 3 minutes elapsed be fore the man was under a safety shower and his clothes were removed. This was the first such incident of skin contact of any signifi cant extent to come to our attention during a period of more than 20 years' production and use of piperidine. Past experience and avail able references (Industrial Hygiene and Tox icology, F. A. Patty, Vol. II, 2nd ed., Inter- 95 96 January-February, 1965 science Publishers, New York, 1962) did not suggest the magnitude of the contact hazard. However, consideration of the strongly alka line nature (phf at 25C = 2.80; K= 1.6x 10"3) and potent solvent properties of this material would indicate severe corrosive necrotic action on the skin to an extent great er than "strong primary irritant." On the basis of this unfortunate incident, a recom mendation to classify piperidine as a hazard ous chemical is considered justified. A. L. Linch Medical Division E. I. DuPont De Nemours & Co. Chambers Works Penns Grove, New Jersey The efficiency of this apparatus was checked by extraction of known weights of mineral oil (from 0.05 to 1.00 gm, pharmaceutical grade) randomly scattered on the filter. Recoveries for both 1-hour and y^-hour extractions aver aged 99.7%. Recovery data for actual load ings of gasoline engine exhaust fumes indicate that treatment by the vapor-reflux method for 20 minutes gives essentially 100% extraction of benzene-soluble particulates, whereas 3 hours of Soxhlet extraction was required for comparable results. A further advantage lies in the fact that it is not necessary to filter the extract to remove particulates, thus offering a saving in time and an increase in accuracy, A Rapid High-Efficiency Extraction Technique The estimation of benzene-soluble organic contaminants in air is normally done by col lection on a glass fiber filter, a portion of which is subsequently extracted with a Soxhlet apparatus. Extraction time can be materially reduced with the apparatus shown in Figure 1, which utilizes the principle of vapor phase degreasing combined with reflux washing. The pictured apparatus features a unitized assembly with specially designed springloaded supports. The sample filter is folded on itself to contain particulates, rolled into a tight cylinder, and slipped into a 16-mm x 60 mm paper extraction thimble which is placed in the reflux column as shown. Boiling ben zene vapors envelop the sample and proceed upward to the condenser. The condensate flows downward through the three-way stop cock and is discharged onto the sample. The sample is thus continually washed with fresh ly distilled solvent while remaining in contact with hot solvent vapor. The drip-tip of the condenser prevents return of condensate down the vapor bypass. On completion of the ex traction, the stopcock is rotated 120 to distill excess solvent for re-use. When only a few milliliters of solvent remain, the boiling flask is removed and heated under an infrared lamp for a few minutes while a stream of ambient air is gently aspirated through the flask to accelerate drying. Figure 1. Apparatus for solvent (benzene) ex traction of organic contaminants. since filtration loses are precluded. The volume of solvent required is only 25 ml, virtually 90% of which is recovered in pure form for re-use. (Note: This investigation was sup ported in part by the Clico Laboratory Sup ply Company, 901 North 21st Avenue, Phoe nix, Arizona, which has been awarded an ex clusive license for the manufacture and sale of this apparatus under U. S. Patent Applica tion Serial Number 318,281 with further patents pending.) Lynn D. Wilson, Ph.D. Professor of Engineering Arizona State University Tempe, Arizona FILMBADGE RADIATION MONITORING SERVICE ST. JOHN X-RAY LABORATORY Califon, N. J. 07830 196S--Our 40th Anniversary Reduce the Hazards of MERCURY Poisoning KEEP COOL VENTILATING SUITS Lightweight, airline fed, workers may stay ex tended periods of time in high ambient tem peratures or extreme humidity. Worn under coveralls or aluminized protective clothing, the wearer is kept cool and efficient. AIR CONDITIONING SYSTEMS A 17-pound completely self-contained air-conditioning and breathing device that can be worn for several hours under impermeable clothing. Oper ated on liquid air (NOT OXYGEN), the unit enables workers to perform ex treme physical exertion for extended periods of time in atmospheres in excess of 500 degrees F. FRIGIVESTS D o w n lo a d e d B y: [U n iv e r s ity o f M o n ta n a ] A t: 2 3 :3 6 5 O c to b e r 2009 MERCURY DECONTAMINANT HgX PROTECTIVE HAND CREAM MERCURY VAPOR METERS Write for free descriptive literature including SAFETY WALL PLACARD "Ten Suggestions to Prevent Mercury Poisoning" Another concept of cooling men working in hot and humid areas. Entire unit weighs 12 pounds and utilizes a cooling cartridge that operates for one hour, can be regenerated in any low temperature commercial refrigerator. Completely self-contained. Fyrepel also offers--Air Cooled Helmets, Breathing Apparatus, Acid-Resistant Clothing, Chest Voice and complete head to toe heat protective clothing and equipment. Our staff of experts stand ready to serve you. If you have a problem, write, wire or call. FYREPEL PRODUCTS INC. 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