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Discussion - Potential Contaminant Sources: It is assumed that if chemical contamination was present on the subject property it would most likely come from past agricultural operations using pesticides and herbicides. However, it appears that no agricultural products of concern have been used or produced on this property for the last 5-years. No surface evidence was observed to indicate that these sources were used on site, or from previous site use. A septic system was not located on site and due to current site conditions it appears that at is ime there is no concern relating to septic contamination. Conclusions: A surface reconnaissance was performed on Wednesday, January 16, 2002 to observe present property conditions and for indications of on-site contaminant sources. It is our understanding that the land has been used for the growth of alphalpha and tomatoes only and that the owners are considering a change in land use. In our opinion, due to the absence of indications of major servicing or repair of farm equipment areas, subsurface fuel storage tanks, pesticides storage and their storage/service areas, or development of farm buildings, the subject property does not appear to have been contaminated from these possible sources. The above ground diesel tanks were observed on-site appears to be properly maintained/monitored and do not appear to be an obvious source of contamination at this time. However, if staining or leakage occurs from these above ground diesel tanks in the future, some sampling activity may be warranted or could be required by regulating agencies. The property did not appear to have excessive nitrate presence from indigenous animal overpopulation, livestock use, septic systems or agricultural chemical use on the basis of this review. Our site reconnaissance did reveal on-site potential sources of contaminants (i.e. above ground fuel tanks, staged farm equipment). The history of property use did not indicate the presence or misuse of fuels or agricultural chemicals. In our opinion, the current land use appears as agriculturally fallow and partially developed, and on the basis of the reconnaissance and inquires reported herein, indications of on-site contaminant sources from previous land use were not present or observed at this time. Limitations: This report has been prepared specifically for Thomas Pereira property located at 15345 Grant Line Road (APN#209-190-30) in Tracy, CA. The interpretations, conclusions and recommendations made herein are based on the site reconnaissance and professional judgment of the data and and its analysis for the on-site/off-site investigations and should be reviewed in the context of this report. Samples of surface or subsurface materials were collected or analyzed for this report and should be viewed in the context of this report only. Please note that conditions of the property may change with time and the use of this report by third parties is entirely at their own risk. Wright Environmental Services, Inc. is not responsible for errors in analysis and reporting, or errors in information contained in published or unpublished reports, or for information not available during the course of the study, and no warranty or guarantee is expressed or implied therein. THOMAS PEREIRA PROPERTY at 15345 Grant Line Road,Tracy,CA 95304 Page 6