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V. REFERENCES Bond G 1988. Letter to Dow Chemical Company. Burek JD, Nitschke KD, Bell TJ, Wackerle DJ, Childs RC, Beyer JE, Dittenber DA, Rampy LW and McKenna MJ. 1984. Methylene chloride: a two year inhalation toxicity and oncogenicity study in rats and hamsters. Fund Appl Toxicol 4:30-47. California Department of Health Services (CDHS) 1989. Report to the Air Resources Board on Methylene Chloride. Part B. Health Effects of Methylene Chloride. Air Toxicology and Epidemiology Section, Berkeley, CA. Cohn MS. 1987. Update risk assessment for methylene chloride (dichloromethane). In: Methylene chloride briefing package for U.S. Consumer Products Safety Commission. U.S. Consumer Products Safety Commission, Washington, DC. Dow Chemical Company. 1980. Methylene Chloride: A Two-Year Inhalation Toxicity and Oncogenicity Study in Rats and Hamsters, Follow-Up Response A. FYI-OTS-0281-0097. U.S. Environmental Protection Agency, Office of Toxic Substances, Washington, DC. Friedlander BR, Hearne FT and Hall S. 1978. Epidemiologic investigation of employees chronically exposed to methylene chloride: mortality analysis. J Occup Med 20:657-666. Friedlander BR, Pifer JW and Hearne FT. 1985. 1964 Methylene Chloride Cohort Mortality Study: Update Through 1984. Eastman Kodak Company, Rochester, NY. Friedlander BR, Hearne FT, Pifer JW and Grose FH. 1986. Epidemiologic evidence regarding methylene chloride. Presented at the Winter Toxicology Forum, February 18, 1986. Washington, DC. Hearne FT and Friedlander BR. 1981. Follow-up of methylene chloride study. J Occup Med 23:660. Hearne FT, Pifer JW, Friedlander BR and Raleigh RL. 1987. Methylene chloride mortality study: dose response to characterization and animal model comparison. J Occup Med 29:217-228. International Agency for Research on Cancer (IARC). 1986. Dichloromethane. In: Some Halogenated Hydrocarbons and Pesticide Exposures. Vol. 41. Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Humans. IARC, Lyon, France, pp. 43-85. Mennear JH, McConnell EE, Huff JE, Renne RA and Giddens E. 1988. Inhalation toxicology and carcinogenesis studies of methylene chloride (dichloromethane) in F344/N rats and B6C3F1 mice. Ann N Y Acad Sci 534:343-351. Hazardous Substance Data Bank (HSDB) (Internet version) 1998. National Library of Medicine, Bethesda MD. 367
National Toxicology Program (NTP) 1986. Toxicology and Carcinogenesis Studies of Dichloromethane (Methylene Chloride) (CAS No. 75-09-2) in F344/N Rats and B6C3F 1 Mice (Inhalation Studies). TR No. 306, Publication No. 86-2562. NIH (USDHHS, PHS, NIH). Nitschke KD, Burek JD, Bell TJ, Kociba RJ, Rampy LW and McKenna MJ. 1988a. Methylene chloride: a two-year inhalation toxicity and oncogenicity study in rats. Fundam Appl Toxicol 11:48-59. Ott MG, Skory LK, Holder BB, Bronson Jm and Williams PR. 1983a. Health evaluation of employees occupationally exposed to methylene chloride: general study design and environmental considerations. Scand J Work Environ Health 9:1-7. Ott MG, Skory LK, Holder BB, Bronson JM and Williams P. 1983b. Health evaluation of employees occupationally exposed to methylene chloride: mortality. Scand J Work Environ Health 9:8-16. Ott MG, Skory LK, Holder BB, Bronson JM and Williams PR. 1983c. Health evaluation of employees occupationally exposed to methylene chloride: clinical laboratory evaluation . Scand J Work Environ Health 9:17-25. Ott MG, Skory LK, Holder BB, Bronson JM and Williams PR. 1983d. Health evaluation of employees occupationally exposed to methylene chloride: twenty-four hour electrocardiographic monitoring . Scand J Work Environ Health 9:26-30. Ott MG, Skory LK, Holder BB, Bronson JM and Williams PR. 1983e. Health evaluation of employees occupationally exposed to methylene chloride: metabolism data and oxygen half-saturation pressures. Scand J Work Environ Health 9:31-38. Serota DG, Thakar AK, Ulland BM, Kirschman JC, Brown NM, Coots RH and Morganeide K. 1986a. A two-year drinking water study of dichloromethane on rodents: I. Rats. Food Chem Toxicol 24:951-958. Serota DG, Thakar AK, Ulland BM, Kirschman JC, Brown NM, Coots RH and Morganeide K. 1986b. A two-year drinking water study of dichloromethane on rodents: II. Mice. Food Chem Toxicol 24:959-963. U.S. Environmental Protection Agency (US EPA) 1985a. Health Assessment Document for Dichloromethane (Methylene Chloride). Final Report. EPA-600-8-82/004F. U.S. Environmental Protection Agency (US EPA) 1985b. Addendum to the Health Assessment Document for Dichloromethane (Methylene Chloride). Updated Carcinogenicity Assessment of Dichloromethane (Methylene Chloride). EPA 600-8-004F. U.S. Environmental Protection Agency (US EPA) External Review Draft. Update to the Health Assessment: Document and Addendum for Dichloromethane (Methylene Chloride): Pharmacokinetics, Mechanism of Action, and Epidemiology. EPA-600-8-87/030A. 368
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Air Toxics Hot Spots Program Risk A
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Prepared by: John D. Budroe, Ph.D.
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This document is one of five docume
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TABLE OF CONTENTS PREFACE i INTRODU
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N-Nitrosodimethylamine 401 N-Nitros
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Hot Spots Unit Risk and Cancer Pote
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Additional ATES and PETS documents
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data. If several data sets (dose an
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US EPA Calculation of Carcinogenic
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exposure to a concentration of 1 µ
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incidences for each of the dose lev
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computes the surface area of a sphe
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Comparison of Hot Spots Cancer Unit
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Gold, L., de Veciana, M., Backman,
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Animal Studies Rats Woutersen et al
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ased on sufficient evidence of carc
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ACETAMIDE CAS No: 60-35-5 I. PHYSIC
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Methodology Expedited Proposition 6
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cancer mortality. However, US EPA (
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Table 2. Lung adenoma incidence in
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Table 3 (continued). Acrylamide-ind
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Robinson M, Bull RJ, Knutsen GL, Sh
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Also, a trend was observed correlat
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eported. Cause-specific expected de
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Bio/Dynamics Inc. conducted a study
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examination. Interim sacrifices wer
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Table 8. Tumor incidence in male an
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Gaffey WR and Strauss ME. 1981. A m
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(technical grade; 98% pure) by gava
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International Agency for Research o
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still alive in the low-dose control
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ANILINE CAS No: 62-53-3 I. PHYSICAL
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fibrosarcomas, stromal sarcomas, ca
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ARSENIC (INORGANIC) CAS No: 7440-38
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elationship between arsenic exposur
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al. (1988) did not induce lung tumo
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A risk assessment was also conducte
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Chen C, Chuang Y, You S, Lin T and
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Schrauzer G, White D, McGinness J,
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Table 1: Summary of epidemiologic s
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had at least one animal demonstrati
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mesothelioma, recommended lifetime
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National Institute for Occupational
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BENZENE CAS No: 71-43-2 I. PHYSICAL
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Animal Studies Available experiment
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Table 3: Summary of NTP bioassay re
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Table 4: Summary of benzene low-dos
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Maltoni C, Conti B and Cotti G. 198
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a benign tumor of the kidney. No ba
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al. (1968) found no tumors in lifet
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following relationship, where C(t 1
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Miakawa M. and Yoshida O. 1975. Pro
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human population and that BPDE-DNA
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demonstrated the tumor initiating a
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Table 4: Bronchoalveolar tumors fro
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Table 5: IARC groupings of PAHs, mi
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Table 6 (continued): IARC Group 3 P
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Potency Equivalency Factors (PEF) f
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This was rounded to a PEF of 0.1. 1
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experiment (Takayama et al., 1985)
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Deutsch-Wenzel RP, Brune H, Grimmer
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Krewski D, Thorslund T and Withey J
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U.S. Environmental Protection Agenc
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Sorahan et al. (1983) studied cance
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Lijinsky W. 1986. Chronic bioassay
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the drinking water (Schroeder and M
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Table II. Effective dose, upper-bou
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BIS(2-CHLOROETHYL)ETHER CAS No: 111
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IV. DERIVATION OF CANCER POTENCY Ba
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BIS(CHLOROMETHYL)ETHER CAS No: 542-
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Table 1. Bis(chloromethyl)ether-ind
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Drew RT, Laskin S, Kuschner M and N
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ates for the 1968 U.S. male populat
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Table 1: Incidence of primary tumor
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National Institute of Occupational
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was less than 0.05 when controlling
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up period. The final cohort include
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If the cadmium-exposed workers incl
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on personnel records (20%); (3) eva
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were exposed to a continuous (23.5
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procedure (NLIN), the parameters we
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International Agency for Research o
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Two reports were published on cance
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Mendel rats, respectively), and sub
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Eschenbrenner A and Miller E. 1946.
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III. CARCINOGENIC EFFECTS Human Stu
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cancers, were less than expected. T
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and no cases of cancer (although cl
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There was a statistically significa
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NTP (1982a) also conducted an carci
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Several pathologists have independe
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hepatocellular adenoma/carcinoma tu
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carcinogenic potency may decline in
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Cochrane W, Singh J and Miles W. 19
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North Atlantic Treaty Organization,
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CHLORINATED PARAFFINS (average chai
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ased on dose-response data for beni
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chloroform in drinking water with k
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Overall, the present epidemiologica
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female dogs received toothpaste bas
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Calculated q 1 * values from the ab
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Hogan MD, Chi Py, Hoel DG and Mitch
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Table 1. Study design summary for N
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V. REFERENCES California Environmen
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toluidine. Followup of this subcoho
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feeding studies on by NCI (1979) us
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CHROMIUM (HEXAVALENT) CAS No: 18540
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expected rate may be inflated becau
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Oral Borneff et al. (1968) exposed
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CREOSOTE (COAL TAR-DERIVED) CAS No:
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from an inhalation exposure study (
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Table 1. Study design summary for N
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Table 1. Experimental design for ca
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Hazardous Substance Data Bank (HSDB
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Table 1: Tumor induction in Fischer
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Hazardous Substance Data Bank (HSDB
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Table 1. Experimental design of 2,4
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Additional analysis of these data b
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Jackson RJ, Greene CJ, Thomas JT, M
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Table 1. Tumor incidence in rats ex
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Girard R, Tolot F, Martin P and Bou
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exposed more than 16 years before t
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interpretation of dose extrapolatio
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1, 1-DICHLOROETHANE CAS No: 75-34-3
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Table 1b. Study design for carcinog
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National Cancer Institute (NCI) 197
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mice, hepatocellular carcinoma inci
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V. REFERENCES California Department
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DAB/day by gavage for the life of t
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2,4-DINITROTOLUENE CAS No: 121-14-2
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Ellis et al.(1979) (also reported b
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Final Statement of Reasons for OAL,
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to the small sample size and short
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In an inhalation study, Torkelson e
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V. REFERENCES American Conference o
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EPICHLOROHYDRIN CAS No: 106-89-8 I.
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espiratory tumors were noted in the
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Table 4. Epichlorohydrin-induced fo
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Konishi Y, Kawabata A, Denda A, Ike
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exposed to arsenicals for 20 months
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espectively (all statistically sign
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ETHYLENE DICHLORIDE CAS No: 107-06-
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Several factors have been suggested
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myelogenous leukemias (4 and 8 year
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statistically significant. CDHS not
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combined with the incidence in the
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incidence of primary brain tumors.
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Table 6 (continued): Organ/Sex Mali
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An Upper 95% Confidence Limit (UCL)
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ETHYLENE THIOUREA (ETU) CAS No: 96-
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male and female rats. Tumor inciden
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FORMALDEHYDE CAS No: 50-00-0 I. PHY
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presented an extension of a previou
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Methodology In developing a spectru
Page 325 and 326: Casanova M, Morgan KT, Steinhagen W
Page 327 and 328: Tobe M, Kaneko T, Uchida Y, Kamata
Page 329 and 330: Table 1. Hexachlorobenzene-induced
Page 331 and 332: 50 pups (F 1 ) of each sex were ran
Page 333 and 334: Ertürk E, Lambrecht RW, Peters HA,
Page 335 and 336: Table 1. Liver hepatoma incidence i
Page 337 and 338: 1988). An airborne unit risk factor
Page 339 and 340: HYDRAZINE CAS No: 302-01-2 I. PHYSI
Page 341 and 342: Methodology Inhalation A linearized
Page 343 and 344: LEAD AND LEAD COMPOUNDS (INORGANIC)
Page 345 and 346: and other occupational carcinogens
Page 347 and 348: y inhalation is similar for rats an
Page 349 and 350: Goyer RA. 1992. Nephrotoxicity and
Page 351 and 352: LINDANE (g-Hexachlorocyclohexane) C
Page 353 and 354: Using these relationships, a human
Page 355 and 356: METHYL TERT-BUTYL ETHER (MTBE) CAS
Page 357 and 358: Tumor incidences according to the r
Page 359 and 360: kidney changes indicative of chroni
Page 361 and 362: Interspecies scaling for oral doses
Page 363 and 364: Table 4 (continued): Dose Response
Page 365 and 366: Experimental Pathology Laboratories
Page 367 and 368: Animal Studies Male and female HaM/
Page 369 and 370: Gold L, Sawyer C, Magaw R, Backman
Page 371 and 372: Using the statistical tests (one-ta
Page 373 and 374: Table 1: Methylene chloride-induced
Page 375: Significant treatment-related incre
Page 379 and 380: noted; however, the study duration
Page 381 and 382: Crump KS, Howe RB, Van Landingham C
Page 383 and 384: Table 1. Michler’s ketone-induced
Page 385 and 386: NICKEL AND NICKEL COMPOUNDS CAS No:
Page 387 and 388: the high exposure group was 14.0. A
Page 389 and 390: male and 121 female rats, was expos
Page 391 and 392: 2.1 - 2.6 × 10 -4 (µg/m 3 ) -1 .
Page 393 and 394: U.S. Environmental Protection Agenc
Page 395 and 396: The increased incidence of bladder
Page 397 and 398: A linearized multistage procedure w
Page 399 and 400: N-NITROSO-N-METHYLETHYLAMINE CAS No
Page 401 and 402: Hazardous Substance Data Bank (HSDB
Page 403 and 404: propylamine in drinking water at 0.
Page 405 and 406: N-NITROSODIETHYLAMINE CAS No: 55-18
Page 407 and 408: Table 2. Treatment groups, concentr
Page 409 and 410: California Department of Health Ser
Page 411 and 412: animals and the second generation t
Page 413 and 414: ationale for selection of the OEHHA
Page 415 and 416: A unit risk value based upon air co
Page 417 and 418: N-NITROSODIPHENYLAMINE CAS No: 86-3
Page 419 and 420: Methodology Dosage estimates of NDP
Page 421 and 422: Crump KS, Howe RB. 1984. The multis
Page 423 and 424: Table 1. P-Nitrosodiphenylamine-ind
Page 425 and 426: N-NITROSOMORPHOLINE CAS No: 59-89-2
Page 427 and 428:
Page 429 and 430:
N-NITROSOPIPERIDINE CAS No: 100-75-
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Table 3. N-Nitrosopiperidine-induce
Page 433 and 434:
Crump KS, Howe RB, Van Landingham C
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testicular tumors were noted in the
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PARTICULATE MATTER FROM DIESEL-FUEL
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etired railroad workers who had had
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employment (χ 2 test for trend: p
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elevated smoking-adjusted risk esti
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Table 1 (continued): Reference Miln
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Table 1 (continued): Reference Damb
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Table 1 (continued): Reference Burn
Page 451 and 452:
Table 1 (continued): Reference Raff
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Table 1 (continued): Epidemiologica
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Table 1 (continued): Epidemiologica
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Table 1 (continued): Reference Wegm
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Animal Studies Section 6.1 (Animal
Page 461 and 462:
The variability, or heterogeneity,
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estimate for those studies for whic
Page 465 and 466:
Figure 1: Estimates of Relative Ris
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q 1 * = Excess relative risk × CA
Page 469 and 470:
Table 3: Number of Workers in the E
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u nexposed workers at zero concentr
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for each µg/m 3 of diesel exhaust
Page 475 and 476:
Table 4: Values from Unit Risk for
Page 477 and 478:
their findings that a reasonable es
Page 479 and 480:
Garshick E, Schenker M, Woskie S an
Page 481 and 482:
Lewis T, Green, FH MW, Burg J and L
Page 483 and 484:
Rothman K. 1986. Modern epidemiolog
Page 485 and 486:
PENTACHLOROPHENOL CAS No: 87-86-5 I
Page 487 and 488:
The default lifespan for mice is 10
Page 489 and 490:
documented. An excess risk from ski
Page 491 and 492:
B6C3F 1 mice and F344/N rats were e
Page 493 and 494:
This model, rather than a time depe
Page 495 and 496:
POLYCHLORINATED BIPHENYLS (PCBs) CA
Page 497 and 498:
several benign adenomatous lesions
Page 499 and 500:
Ito et al. (1973) exposed groups of
Page 501 and 502:
could not be characterized by chlor
Page 503 and 504:
exposure (all pathways and mixtures
Page 505 and 506:
National Toxicology Program 1993. T
Page 507 and 508:
Table 1. Potassium bromate-induced
Page 509 and 510:
1,3-PROPANE SULTONE CAS No: 1120-71
Page 511 and 512:
Page 513 and 514:
PROPYLENE OXIDE CAS No: 75-56-9 I.
Page 515 and 516:
oxide. In the NTP carcinogenicity s
Page 517 and 518:
1,1,2,2-TETRACHLOROETHANE CAS No: 7
Page 519 and 520:
assumed a body weight of 70 kg and
Page 521 and 522:
total); an untreated control group
Page 523 and 524:
TOLUENE DIISOCYANATE CAS No: 26471-
Page 525 and 526:
Animal Studies The National Toxicol
Page 527 and 528:
Mortillaro PT and Schiavon M. 1982.
Page 529 and 530:
male or female rats. Increases in h
Page 531 and 532:
TRICHLOROETHYLENE CAS No: 79-01-6 I
Page 533 and 534:
A mortality analysis of a cohort of
Page 535 and 536:
elative to that of the controls whi
Page 537 and 538:
applied or metabolized. The range o
Page 539 and 540:
Katz RM and Jowett D. 1981. Female
Page 541 and 542:
10,000 ppm 2,4,6-trichlorophenol in
Page 543 and 544:
Page 545 and 546:
Bionetics Research Laboratories. 19
Page 547 and 548:
control; females: 6/10 exposed, 0/1
Page 549 and 550:
over controls (p < 0.04). Other tum
Page 551 and 552:
was increased (100/314 exposed vs.
Page 553 and 554:
Table 3. Cancer potency estimates f
Page 555 and 556:
Crouch E. 1983. Uncertainties in in
Page 557 and 558:
VINYL CHLORIDE CAS No: 75-01-4 I. P
Page 559 and 560:
Table 1 (continued): A Summary of E
Page 561 and 562:
al., 1983). Histopathology of all o
Page 563 and 564:
Table 3: Tumor incidences in 100 pp
Page 565 and 566:
experiment, animals were exposed to
Page 567 and 568:
Experiment BT1 Most previous risk a
Page 569 and 570:
No statistical analyses of mortalit
Page 571 and 572:
Table 11 gives unit risk estimates
Page 573 and 574:
Bertazzi PA, Villa A, Foa V, Saia B
Page 575 and 576:
Nicholson WJ, Hammond EC, Seidman H
Page 577 and 578:
immunotoxicity, reproductive toxici
Page 579 and 580:
scheme. TEFs for two major noncance
Page 581 and 582:
NATO/CCMS (1988a) Pilot Study on In
Page 583 and 584:
Table 2 Toxicity Equivalency Factor
Page 585 and 586:
Table 4 A Comparison of CTEF- and I
Page 587 and 588:
Office of Environmental Health Haza
Page 589 and 590:
Group 4: The agent is probably not
Page 591 and 592:
TECHNICAL SUPPORT DOCUMENT FOR DESC
Page 593 and 594:
US EPA IRIS Inhalation Unit Risk an
Page 595 and 596:
TECHNICAL SUPPORT DOCUMENT FOR DESC
Page 597 and 598:
as appropriate, and revise IRIS fil
Page 599 and 600:
Chemical Exposure Route Study Type
Page 601 and 602:
Page 603 and 604:
Page 605 and 606:
Methyl tert-butyl ether p. 5: Added
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