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Y <br /> terns of swimming. The highest mean concentration the water and air of covered swimming pools using chlorine for <br /> water disinfection.Wal Res 1981; 15:1703-14. <br /> was observed in level I swimmers. Perhaps this de 3. Chambon P, Taveau M, Morin M, Chambon R, Vial J. Survey of <br /> pends On the fact that the first approach to the competi- Irihalomethane levels in Rhone-Alps water supplies.Wat Res 1983; <br /> live training involves more physically demanding per- 17:65-69. <br /> formance. 4. Aggazzolti G. Predieri G. Survey of volatile halogenated organics <br /> As reported previously, chloroform is classified as a (V0)in Italy.Levels of VI 10 in drinking water,surface water and <br /> carcinogenic substance for experimental animals. For swi(VI <br /> pools.Wat Res 1986; 20:959-63. <br /> 5. IARC. IARC monograph on the evaluation of carcinogenic risks to <br /> this reason, more information on human exposure is humans, Suppl. 7, overall evaluations of cancerogenicity: an <br /> needed. People attending indoor swimming pools, ex- updating of IARC Monograph vol I to 42, Lyon:IARC, 1987. <br /> posed for a precise amount of time at a measurable 6. IARC. IARC monographs on evaluation of carcinogenic risks to <br /> concentration, offer an available population for biolog- humans, vol. 52: chlorinated drinking water; chlorination by- <br /> ical chloroform monitoring. Analysis of chloroform in products;some other halogenated compounds;cobalt and cobalt <br /> compounds. Lyon: IARC, 1991. <br /> alveolar air appears to be a feasible way to assess in- 7. United Stales Environmental Protection Agency. (leallh <br /> door exposure in healthy subjects. Moreover, its Sim- assessment document for chloroform. EPA/600/880041'. <br /> plicity and low cost make this sampling method suita- Washington.DC:Office of I leallh and Environmental Assessment, <br /> ble for large surveys. September 1985. <br /> B. Agga77olti G, Predieri G,Zavalli A.Sulla presenza di trialometani . <br /> nell'acqua a nell'aria delle piscine della cilia'di Modena. Ig Mod <br /> * * * * * * * * * * 1984; 81:1416-32. <br /> 9. Aggazzotti G, Fantuzzi G, Tarloni PL, Predieri G. Plasma <br /> This study was supported by a grant from the Italian Ministry for Sci- chloroform concentrations in swimmers using indoor swimming <br /> entific and Technological Research (40% and 60'x) and by the re- pxxols.Arch Environ Health 1990; 45:175-79. <br /> search fellowship "Giucia Zanasi." We are indebted to the Ilea(of 10. Aggazzotti G, Predieri G, Fantuzzi G. Ileadspace gas <br /> Sports-Recreation Department, City of Modena, Italy, to the swirn- chromatographic analysis for determining low levels of chloroform <br /> mers who participated in our study, and to the staff of the indoor in human plasma. J Chromatngr 1987; 416:125-30. <br /> swimming pools in Modena. 11. Copaken J. Trihalomethanes: is swimming pool water hazardous? <br /> Suhmi(led for publication April 21, 1992; revised; accepted for pub- In: Jolley, Condie, Johnson, el if., eds. Water chlorination <br /> licalion July 9, 1992. chemistry,environmental impact and health effects.Chelsea,ME <br /> Lewis Publishers, 1990. <br /> Requests for reprints should be sent to: Gabriella Agg.177olli, B.D., <br /> ktilulo di Igiene, Via Carnpi 287, 41100 Modena, Italy. 12 Wallace L, Pellizzari E, 1 lartwell T, el al. Concentrations of 20 <br /> volatile organic compounds in the air and drinking water of 350 <br /> residents of New Jersey cornea ed with concentrations in their <br /> * * * * • * * * * * exhaled breath. I Occup Med 1986; 28:603-8. <br /> .i 13. Monster AC. Biological markers of solvent exposure.Arch Environ <br /> Ileallh 1988; 43:90-93. <br /> References 14. SPSS/PC+ for the IBM PCIXT/AT. Chicago: SPSS Inc., 1986. <br /> 15. BMDP Statistical Software, Los Angeles, 1990. <br /> 1. Beech Al, Diaz R,Ordaz C, Palomeque B. Nitrates,chlorates and 16. Shalkin)A, Szeinwald Brown 11. Pharmacokinetics of the dermal <br /> Irihalomethanes in swimming pool water. Am J Public I health mule of exposure to volatile organic chemicals in water: a <br /> 1980; 70:79--02. computer simulation model. Environ Res 1991: 56:90-108. <br /> 2. Lahl U, Batier K, Duszeln JV, Gabel B, Stachel B, 1hiemann W. 17, Sato A, Nakajima T. A structure activity relationship of some <br /> Distribution and balance of volatile halogenated hydrocarbons in chlorinated hydrocarbons. Arch Environ I leallh 1979;69-75. <br /> I <br /> I <br /> 254 Archives of Environmenlal Health <br />