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§3.0 IDENTIFICATION OF ALL PAST AND CURRENT SOURCES OF CONTAMINATION § 3.1 Discussion of the methods used to research and investigate the potential or known above- ground and below ground sources of contamination at the site include the following: The first informational gathering source was direct observation of the entire property, along with the Environmental Questionnaire found in Appendix B. The Questionnaire documents environmental information obtained directly from Mr. Sanjay Birla, as the owner of the property. He is the most knowledgeable of the activities that have taken place on and around the subject property for the time period he has owned the property. However, he declined to answer the length of time he has owned the subject property. The second informational source is the Geotracker Site List from the State Water Resources Control Board for underground(USTs), leaking underground fuel tanks (LUFTs) and other contaminated sites. The Site List reveals no contaminated sites within 1,000 ft of the property. Within 1 mile,there are three Closed Sites, a Cleanup Program Site upgradient to the property, a permitted UST, and a land disposal site, also upgradient to the property. Groundwater gradient flow has been very accurately determined to be in a northeast direction based upon studies conducted for the Tracy Defense Depot. The upgradient referenced sites may be considered far from the subject property and unlikely to impact it. However, this does not preclude contaminated groundwater from flowing under the subject property from an unknown source. The groundwater depth will be discussed in the Soil Suitability Study. The property is not�t to the 100-year flood as determined by Schack& Company. The third informational source is the USDA Soil Map found in Appendix D illustrating the soil type under the property. The property soil is a Stomar clay loam(#252). Because of the soil clay content, this soil type has highly beneficial properties for the mitigation of agrichemical impact through biological decomposition processes. . - §3.2 Description of all past on-site potential and/or known abovew ground sources of contamination identified on the property include: 1.) =never be an above ground or underground fuel storage tanks(AST/UST) r. Birla has owned the property, nor was there ever an AST/UST to his knowledge on the property. Fuel tanks that may have been on the property prior to the present ownership are unknown and were not documented. 2.)No observation was made of soil depression areas over the surface of the property, which may be indicative of buried material. However, there is a general depression of proposed Parcel 1 that may require the importation of soil to build up the western half of the property. 3.) Nitrate from agricultural crop fertilization are of an unknown concern at this time. Page -4-