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From direct observations, no hazardous waste has been disposed of improperly. All used fluids, (oil, antifreeze, etc.) are stored correctly for periodic pick-up. There has never been an on-site incident involving hazardous material spillage or other type of accidental release. As illustrated by the attached photograph, an area exists where the trucks are washed. This area is for washing the exterior only, and there was no evidence of grease or oil on the soil. If engines are to be steam cleaned before servicing,this is done at the truck stop wash bay on Tracy Boulevard. The site was inspected for environmental concerns originating from discolored, disturbed/ subsided soils (localized), stressed vegetation or unusual/.noxious odors, particularly by the drainage ditch. None of these environmental indicators were observed. Mounds of soil amendment materials, namely gypsum and compost are in the "back" or the west one-quarter of the subject property. These materials are innocuous and stored on-site for short duration when there is a need for temporary storage due to amounts ordered in excess. An important concern associated with the environmental assessment of agricultural properties is the issue of buried pesticide containers or discarded items. It was an occasional practice to dispose of containers by this method many years ago. To detect these types of underground artifacts is difficult even with the use of ground penetrating radar or other types of non-intrusive, subsurface analyses. It is usually only after a contaminant plume has impacted a domestic well that buried pesticide containers are usually discovered. Due to the high water table and high clay content soil, it is unlikely this practice occurred in this locale. It is our understanding that no petroleum or natural gas pipelines traverse the property, and there appears to be no PG&E or other energy company easements. The static groundwater table is found approximately 8 to 12 feet under the property based upon past investigations. This is considered a very shallow groundwater elevation. If the indigenous soils were of a sand soil structure, the groundwater may be easily impacted from nitrates or agrichemicals. However, since the soil profile to the depth of groundwater consists of a silty clay,this soil type can attenuate possible impact from adverse constituents better than sandy soils. The Well Log for the on-site domestic well can be found in the Appendix. Underlying clay and sand strata are illustrated, with the static water level at 14 feet in 1985. Groundwater directional flow has been determined from the hydrocarbon release investigation at Spreckles Sugar to be in a northeast direction. Therefore, the subject property is downgradient from the Sugar Plant. Since the subject property has been out of agricultural production for more than fifteen years, an evaluation of environmental fate for agrichemical residues as a nonpoint source of potential contamination should not be done. The science of pesticide residues in soil, air, surface water and groundwater is extremely complex and variable. Environmental models that attempt to predict pesticide behavior and transport in the environment are beyond the scope of this investigation and it is highly unlikely that pesticide residues exist within the property soils. 4 Valley Ag Research