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Contaminant Typical Source of Contaminant Health Effects Language <br />Synthetic Organic Contaminants including Pesticides and Herbicides <br />Dibromochloropropane <br />(DBCP) <br />Banned nematocide that may still be present in <br />soils due to runoff/leaching from former use on <br />soybeans, cotton, vineyards, tomatoes, and tree <br />fruit <br />Some people who use water containing DBCP in excess of the MCL over many years may <br />experience reproductive difficulties and may have an increased risk of getting cancer. <br />Ethylene dibromide (EDB) Discharge from petroleum refineries; <br />underground gas tank leaks; banned <br />nematocide that may still be present in soils <br />due to runoff and leaching from grain and fruit <br />crops <br />Some people who use water containing ethylene dibromide in excess of the MCL over many <br />years may experience liver, stomach, reproductive system, or kidney problems, and may have <br />an increased risk of getting cancer. <br />1-California Code of Regulations, Title 22, Appendix 64465-D. Health Effects Language <br />Regulated Contaminants with SECONDARY DRINKING WATER STANDARDS (a) <br />Monitoring Required by Section 64449, Chapter 15, Title 22, California Code of Regulations <br />Contaminant Typical Source of Contaminant <br />Aluminum Erosion of natural deposits; residual from some surface water treatment processes <br />Copper Internal corrosion of household plumbing systems; erosion of natural deposits; leaching from wood preservatives <br />Foaming Agents (MBAS) Municipal and industrial waste discharges <br />Iron Leaching from natural deposits; industrial wastes <br />Manganese Leaching from natural deposits <br />Total Dissolved Solids (TDS) Runoffileaching from natural deposits <br />Specific Conductance Substances that form ions when in water; seawater influence <br />Chloride Runoff/leaching from natural deposits; seawater influence <br />Sulfate <br />/ - \ T1- - -- _ _ _ _ TT Tel a r "-Iv •-• <br />Runoff/leaching from natural deposits; industrial wastes <br />v . • . . . <br /> <br />IviuLus, or man a ory standard healtheffects language for these constituents because secondary MCLs are set on the basis of aesthetics. <br />Title 22 Health Effects Page 2 of 2