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Scannavino Property Page 9 of 16 Our Project Number: LES080581 November 25, 2008 U.S. EPA has classified bifenthrin as Toxicity Class II-moderately toxic. Bifenthrin is relatively insoluble in water, so there are no concerns about groundwater contamination through leaching. Its half-life in soil, the amount of time it takes to degrade to half of its original concentration, is 7 days to 8 months depending on the soil type and the amount of air in the soil. According to EXTOXNET, chlorpyrifos is toxicity class II - moderately toxic. The EPA has established a 24-hour reentry interval for crop areas treated with emulsifiable concentrate or wettable powder formulations of chlorpyrifos unless workers wear protective clothing. Products containing chlorpyrifos bear the Signal Word WARNING or CAUTION, depending on the toxicity of the formulation. According to EXTOXNET, diazinon is an organo-phosphate insecticide classified as slightly toxic to moderately toxic, depending on the formulation. Its average half-life in soil is two to four weeks. Diazinon has been detected in 54 wells in California. According to EXTOXNET and the National Pesticide Information Center, "hydrogen cyanamide is severely irritating and caustic to skin and the inhaled gas is strongly irrating to mucous membranes...dermal lesions in the mouth and tongue and upper esophagus have occurred after exposure." 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, methidathion is a non-systemic organophosphorous insecticide classified as a Restricted Use Pesticide. Effects due to acute methidathion exposures may include nausea, vomiting, cramps, diarrhea, salivation, headache, dizziness, muscle twitching, difficulty breathing, blurred vision, and tightness in the chest. High acute exposure may cause intense breathing problems, including paralysis of the respiratory muscles. Methidathion is highly toxic to birds, bees and aquatic organisms. It is of low persistence in the soil environment; reported Feld half-lives are 5 to 23 days. There is little chance that this chemical will enter surface waters due to its short half-life. Methidathion and its breakdown products are poorly bound by soils, and so may be mobile. However, they have not been detected in any groundwater sources. According to EXTOXNET, methyl bromide is a highly toxic compound in EPA Toxicity Class I. Methyl bromide quickly evaporates at temperatures ordinarily encountered in fumigating. Methyl 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 ©2008 Neil O.Anderson&Associates,Inc.