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FFSURFLAN. Common name: Oryzalin. Half-lives in the environment: Air: unknown. Soil: selected field half-life is 20 d. Half life of 2.1 mos. for aerobic degradation and 10 d for anaerobic degradation. - . Common name: Glyphosate. Half-lives in the environment: Air: Unknown. Surface water: Half life> 9 wks. Groundwater: Unknown. Soil: <60 d. Fertilizers are applied carefully with the proper techniques and controls such as soil and leaf tissue analyses. This allows for an equal distribution of nitrogen,phosphorous and potassium (NPK) for almond tree uptake, thus preventing excessive leaching past the root zone. CONCLUSIONS AND RECOMMENDATIONS From visual observations,there is no surface contamination. The probability of subsurface contamination from pesticides can be considered low-to-nonexistent, considering the referenced environmental fate data. The surface soil type (<5 ft) is predominately a silty sand/sandy silt. The biological activity in this soil would be expected to be somewhat lower than in clay soils. We do not recommend the domestic well water be tested for a multi-residue pesticide screen consisting of analysis for Dinitroanaline, Triazine, Organochlorine and Organophosphates. The subject property is outside of delineated areas in which all new wells must have a grout seal to 200 feet. Bottled water should be used for drinking and cooking purposes. It is our opinion that contamination originating from the existing septic tank and leachfield is unlikely since they are upgradient from the domestic well on Parcel 1. The construction details of the well are unknown. Contamination from a septic tank is usually dependent upon the age and type of tank construction material. The next time the tank is pumped out, the sewage contractor can check its integrity. The density of septic systems in the surrounding area can also be considered low. The density of septic systems is one of the prime factors for contamination of the underlying groundwater. Asbestos containing materials(ACMs)testing from any portion of the existing buildings is outside the scope of this investigation. If the existing residential structure is ever demolished or remodeled,testing for ACMs should be done at that time. Va&y Ag Research