SU0006527 SSCRPT - Laserfiche WebLink

Home Browse Search

Dykxhoorn Property Page 6 Our Project Number: E07024A March 8, 2007 According to Ms. Gallego, when a chemical for which a permit has been issued is applied to a field, the use report must be filed with the Agricultural Commissioner. The use reports do not include chemicals for which a permit is not required.' The EPA's Restricted Use Products (RUP) Report10 was searched for the chemicals reportedly applied to the subject property. Based on this source, it appears that, of the agricultural chemicals reportedly applied to the subject property, only those containing aluminum phosphide, iprodione, lambda-cyhalothrin, paraquat dichloride and permethrin are RUPs. The U.C. Davis Extension Toxicology Network (EXTOXNET) web site" was consulted for additional information on these chemicals. According to EXTOXNET, aluminum phosphide is an inorganic phosphide used to control insects and rodents in a variety of settings. Aluminum phosphide rapidly reacts with water to form highly toxic phosphine gas. It has been reported that aluminum phosphide may be absorbed directly into the bloodstream, although this is probably a very minor route of entry. Aluminum phosphide will breakdown spontaneously in the presence of water to form a gaseous product, and so it is non-persistent and non-mobile in the soil environment, and poses no risk to groundwater. According to EXTOXNET, most iprodione formulations are for general use, but "the use of Rovral is.., restricted to various diseases on fruit, vegetables and some crops." The half-life of iprodione in soil ranges from 20 to 160 days. Iprodione is a Restricted Use Pesticide (RUP) for spring and summer diseases on turf and ornamentals. The use of Rovral is also restricted to various diseases on fruit, vegetables and some crops. Most other products containing iprodione are general use pesticides. RUPs may be purchased and used only by certified applicators. According to EXTOXNET, lambda cyhalothrin is a synthetic pyrethroid insecticide and acaricide used to control a wide range of pests. It is moderately toxic in the technical form, but may be highly toxic via some routes in formulation. Lambda cyhalothrin is moderately persistent in the soil environment, with a field half-life close to 30 days in most soils. According to EXTOXNET, paraquat is a quaternary nitrogen herbicide classified as an RUP and a highly toxic compound in EPA toxicity class I. Many cases of illness and/or death have been reported in humans. The compound is moderately toxic to birds and many aquatic organisms. The chemical is highly persistent in the soil environment, with reported field half-lives of greater than 1000 days. Studies have shown the half life in water to be as fast as 13.1 hours and up to 23 weeks. According to EXTOXNET, permethrin is a moderately to practically non-toxic pesticide in EPA toxicity class II or III, but is listed as a RUP because of its possible adverse effects on aquatic organisms. Permethrin is of low to moderate persistence in the soil environment with reported half-lives of 30 to 38 days. °Personal Communication, November 28, 2005. 10 U.S. Environmental Protection Agency (EPA), June 2003, Restricted Use Products (RUP) Report. University of California, Davis, Extension Toxicology Network (EXTOXNET), http://extoxnet.orst.edu/ghindex.htmi NEIL O . ANDERSON AND ASSOCIATES 902 Industrial Way•Lodi, CA 95240 02007 Neil 0. Anderwn&Associates, Inc.