Listed hazardous waste existing chemical

Endrin and endrin aldehyde are listed as hazardous wastes and disposal of wastes is controlled by a number of federal regulations. Past disposal methods have included landfills (EPA 1987c). Chemical treatment (reductive dechlorination) and incineration are possible disposal methods (HSDB 1995 IRPTC 1985). Existing information on disposal appears adequate. No information was found on disposal of endrin ketone however, because endrin is no longer used in the United States, current levels of endrin ketone in wastes should be minimal and additional information on disposal is not needed. 

Possible releases of heptachlor to soil may occur at hazardous waste sites or as a result of landfill leachate. Residues of heptachlor or heptachlor epoxide exist in soil as a result of past usage of heptachlor for both agricultural and nonagricultural purposes. Heptachlor was detected in 0.71% of the soil samples taken from the NPL sites included in the CLPSD at an estimated mean concentration of 4.07 ppb in the positive samples (CLPSD 1989). Heptachlor epoxide was not listed in the CLPSD of chemicals detected in soil samples collected at NPL sites. Note that the information from the CLPSD includes data from NPL sites only. 

LDRs specified in RCRA required EPA to develop treatment standards for hazardous chemical waste and established deadlines for EPA to develop treatment standards for those wastes for which treatment standards did not exist. Congress divided LDR hazardous waste into several categories solvents and dioxins California listed wastes first, second, and third listed wastes and characteristically hazardous wastes. 

NDMA is not an industrially or commercially important chemical nevertheless, it can be released into the environment from a wide variety of manmade sources. This is due to the inadvertent formation of NDMA in industrial situations when alkylamines, mainly dimethylamine and trimethylamine, come in contact and react with nitrogen oxides, nitrous acid, or nitrite salts, or when trans-nitrosation via nitro or nitroso compounds occurs. Thus, potential exists for release into the environment from industries such as tanneries, pesticide manufacturing plants, rubber and tire manufacturers, alkylamine manufacture/use sites, fish processing industries, foundries and dye manufacturers. At this time, NDMA has been found in at least 1 out of 1177 hazardous waste sites on the National Priorities List (NPL) in the United States (VIEW Database 1989). 

Very recently, 2 more countries in the Asia-Pacific area have set in motion the mechanisms to establish chemical inventcxies. These are South Korea and the Philippines. In 1992, as part of their Toxic Chemicals Control Law , South Korea initiated the requirement to nominate candidate chemicals for their Existing Chemicals List the list closes for nominations on 31st December 1993. Similariy, embodied in the Philippine Toxic Substances and Hazardous and Nuclear Waste Control Act (R.A.6%9,1990), the Philippine Inventory of Chemicals and Chemical Substances was established. Again, the nomination period closes at the end of 1993 (see chapter by Knight). 

---