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V Phase I Environmental Site Assessment East Main Street,Stockton,California December 10,2004 Page 14 L Near-surface sedimentary deposits underlying the Site consist of arkosic alluvium deposits belonging to the Modesto Formation. These arkosic sediments are derived primarily from rocks of the Sierra Nevada 6. Range. The United States Department of Agriculture mapped two soil types at the Site. These are Galt- Urban land and the Stockton silty clay loam, 0 to 2 percent slopes. The Site is located along the southern edge of the inactive Stockton Fault, which has had no displacement for approximately two million years. The Site is shown on Figures 1 through 3 contained in Appendix A. 5.3 EXTERIOR OBSERVATIONS The Site is currently fallow agricultural land with north/south trending dirt roads located between parcels 173-210-06 and 07 and along the western and eastern Site boundaries, and an east-west trending dirt road �, /i along the southern Site boundary at the top of the bank of Mormon Channel. East Main Street is a paved, four-lane road, which is the eastern half of the northern Site boundary. Subsurface irrigation piping is located on all of the parcels. Two irrigation wells with pumps and small concrete reservoirs are located on the Site properties: one on APN 173-210-04 and the other on 173-210-06. Transformer-bearing utility poles are also located in close proximity to the wells. One of the transformers located along the western C33 J portion of the northern boundary of the Site (APN 173-210-05) is not labeled non-PCB containing. No signs of leakage were noted on the transformer or on the soil beneath. Telephone and electrical cables are located overhead along the south side of E. Main Street. Several piles of vegetative debris are located along the southern Site boundary, at the top of the bank of Mormon Channel. A discarded sedan is located at the south end of the dirt road between parcels 06 and 07. No municipal (potable) water or sewer services are located on the Site.Photographs of the Site are contained in Appendix E. The following items were not observed at the Site during the Site reconnaissance unless otherwise noted. 1. Source of potable water L 2. Sewage disposal 3. Hazardous substances and petroleum products in connection with identified uses 4. Storage tanks i 5. Odors 6. Pools of liquid 7. Drums 8. Hazardous substances and petroleum products containers 9. Polychlorinated biphenyls(PCBs) One possibly PCB-containing electrical transformer is located on 173-210-05. 10. Unidentified substance containers L 11. Stained soil or pavement 12. Pits,ponds,or lagoons 13. Stressed vegetation 14. Solid waste Discarded sedan and several vegetative waste piles were located on the north side of Mormon Channel at the southern Site boundary. Miscellaneous dumping of household (3' waste along Site perimeter. 15. Waste water 16. Wells ` Two irrigation wells were each located on APNs 173-210-05 and 173-210-06. 17. Debris L &46 �� CONDOR