Document MGyn529JdbgnekkNxVX8g3kEV

Environmental Events OSHA Noise Control Management Course. Dec. 7. Cambridge. Mass. Contact Gloria A. Cianci. Bolt Ber- ane*t 8 Newman Inc.. 50 Moulton Si.. Cambridge. Mass. 02158 The Approaching Toxics Era. Dec. 7. Washington. D C . Jan. 1 3. Los Angeles. Catit. Contact Can Goslme. MCA. 1825 Conn Ave.. N.W . Washington. D C. 20009. The American Chemical Society's Mid-Atlantic Hegional Meeting cal! lor papers, by January 15. Con tact Dr Wm. A. Sheppard. Experimental Station. Du Pent Company. Wilmington. Del. 19B98 Environmental Regulation ot Industry, December 13-1 4, New York C.tv. January 13-14. Los Angeles Contact Nancy Hinman. Practising Law Institute. 810 7tn Ave. New York. N,v 10019. Toxic Substances Control Act Conference. Dec. ' 5- i 4 Arlington. Va Contact Executive Enterprises i->c to Columbus Circle. New York, N,Y 10019 Preparation of Environmental Impact Statements. De.~ 13-15 Wasnington D C Contaci Director. Contrvm g Enginee'inc Eoucanon. George Wasnngion University. Wasnmgton. D C. 20052 New Concepts ot Occupational Medicine Under OSHA. Dec i5 -17. Orlando. Fia Contact the incusina* Health Foundation. 5231 Centre Ave . Pittsburgh. P 2. 15222 Seminars on Transportation of Hazardous Mate rials. Dec ' 4- ' 5 Memphis. Ter o Contact Sanara D Curetr^ -MTh -3C'i Ohrce oi Hazardous Mater:a>s Ooeravers U S. Desanmert cl Transportation vVasnmg. ten DC 2C590. Symposium on Chemical Dispersants tor the Control of Oil Spills. Jar v ,-:2 Dallas. Tex. Comae: D- W -. E Mon. Ma>; S:a:>o.-D 227 ERDA '.Vasnrg:o". it 20C-45 Course on Laboratory Safety Jan to. - 9 Austm. Tex Contact Har-v Mane: unive'Sify c' Texas System 201 W 7tn S: Austin. Tex 75701 Energy Law & Regulations Seminar, ja n 27*26 Wasnmgion, D C Contact Nancv McNemiey Governmen; msuiuifrs. Inc 4733 setnesGa Ave . N W Was"rg:or Drinking Water Comes Clean in Tests; Pesticide Level Is Only Parts Per Trillion The level of pesticides in the nation's with other sources of human exposure, drinking water is extremely low and is ex such as residues on food. pected to decline further, a study by the Pesticide levels in the general environ Environmental Protection Agency reveals. ment and drinking water are expected to In a recently completed national survey, decline naturally because of EPA bans, the 350 water supplies were analyzed for the agency says. presence of aldrin, dieldrin and DDT. EPA conducted the survey to obtain data Where detected at all, the substances were on which to base possible regulations that found in concentrations at the parts per tril would set maximum permissible levels of lion level (see measurements story on this the pesticides in drinking water. page). - The agency says it has little data on EPA says that pesticide traces found in technology to treat or remove the chemicals drinking water are very small compared at the low concentrations present. Revision Expected In Air Regulations Of some 689 water samples analyzed, dieldrin was found in 115 at levels ranging from four to 80 ppt. Only six of the samples exceeded 20 ppt and only two exceeded 30 ppt. National air quality criteria will be revised during the next three years to agree with recommendations by the former National Air Quality Advisory Committee of the En vironmental Protection Agency. William K. Talley, EPA's assistant admin istrator for research and development, says the timetable calls for revised drafts on photochemical oxidants (and related hyd rocarbons) by August 1977; nitrogen One of the latter samples also contained aldrin at a concentration of 1 4 ppt. Only two samples had DDT in measurable quanti ties--^ 20 and 32 ppt. EPA is now collecting data to assess the feasibility of setting limits on organic chemi cals in drinking water. Research is under way on health effects, contamination sources, treatment and removal technology and analytical techniques. oxides by February 1978; carbon monoxide ' Another study of the seasonal distribu by August 1978; sulfur oxides (and as tion of haloforms (such as chloroform) and sociated particulates) by August 1979; and other synthetic chemicals also is progress "particulate matter.by August 1979. ing. It should be completed early in 1977. -an \u m ^ wr One Part Per Trillion Is a Very Finely-Split Hair Worker exposure to certain chemicals is limited to a few parts per million. Regula tions reduce an industrial waste discharge to one part per billion. Pesticide residues UNIT Length are found in drinking water in the low parts per trillion. Extremely low measurements, and laws Time and regulations based on them, are grow ing more commonplace as science perfects Money increasingly sophisticated sensors. Such infinitesimal figures probably don't Weight register with most people. Only scientists and plant managers trying to get exposures and effluents down to levels as fine as frog Volume hair comprehend and appreciate their meaning. Area Shedding light on the subject, Dr. Warren B. Crumett of The Dow Chemical Company Action has made some comparisons that put the figures in perspective (see table). They are being used by Dow's Ronald O. Kagel during his presentation on "Analyti cal Problems with Plant Effluents" at MCA's Quality symposiums on The Approaching Toxics Era. The final two are scheduled for De \ cember 7 in Washington and January 13 in Rate .F^r-Los Angeles. subject O' TRACE CONCENTRATION UNITS 1 part per million 1 inch/16 miles / part per billion 1 inch/16.000 miles 1 pan per trillion 1 inch/16,000.000 milej (A six-inch leap on a! journey 10 the sun.) 1 minute/2 years 1 second/32 years . 1 second/320 centuries 1*/$ 10,000 1C/S10.000.000 1C/S10.000.000.000 1 ounce/31 tons potato chips 1 pinch salt/10 tons potato chips 1 pinch salt/10,000 tons potato chips 1 drop vermouth/ 80 "fifths" gin 1 sq. ft723 acres 1 drop vermouth/ 500 barrels gin 1 sq. ft736 sq. mi, 1 drop vermouth/250,000 hogsheads of gin 1 sq. in7250 sq. mi. 1 bogey/3.500 golf tournaments 1 bogey/3.500,000 golf tournaments 1 bogey/3,500,000,000 golf tournaments 1 tob/1,200 tennis matches 1 k)b/1,200,000 tennis matches' 1 lob/1,200,000,000 tennis matches 1 bad apple/2,000 barrels 1 bad app!e/2.000,000 barrels 1 bad appie/2,000,000,000 barrels 1 dented fender/10 car lifetimes *7rt Ji / :;J TZOAVE ORDER. 1 dented fender/10,000 1 denied fender/10,000.000 car lifetimes car lifetimes - rM r. i u- ill