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Dama, Inc. March 31, 2004 B94301.01 Page 11 Indications of contamination in the form of stained soil was observed within the on-Site garages/workshops located on the northeastern portion of 1301 W. Joan Avenue property. The staining does not appear to be significant and no specific area was identified where dumping ofwaste oil appears to have occurred. However, the eastern-most garage/workshop appears to exhibit the most soil staining from what appears to be waste oil. Two of the three small shacks at the Site appear to be related to household gardening activities and are centrally located at 1301 W. Joan Avenue.The larger of these shacks is supplied with water and has sink with a water drain pipe. The third shack, which was locked at the time of the reconnaissance,is located on the southwestern portion of the Site.This shack apparently houses the water tank for the former and current water well. The former water well is adjacent to the west of the shack.The former water well does not appear to be properly abandoned. The current water well and pump are located adjacent to the north of the shack. The property at 1248 W. Hammer Lane is vacant with no structures or apparent improvements. However, this portion of the Site is heavily overgrown with grasses and weeds. 6.2 Off-Site Adjoining properties have been in agricultural use since at least 1937 to some time prior to 1950. Since 1950 to the present, the adjoining properties have been residentially developed with the exception of a church which is adjacent to the east of the Site. Several LUST and hazardous waste facilities are within one-half mile of the Site. However, based on distance, direction, type of contamination, and/or the closed status, they are not considered to pose a threat to the Site. Therefore,it is Twining's opinion that the environmental concern presented to the Site from off-Site sources appears low. 7.0 CONCLUSIONS AND OPINIONS On behalf of Dama, Inc.,Twining performed a Phase I at the property located at 1248 W. Hammer Lane and 1301 W.Joan Avenue,in the city of Stockton,San Joaquin County,California. This Phase I was performed during March 2004, and includes property that is developed with a residence.This Phase I has not identified any recognized environmental conditions in connection with the Site. However,the following concerns are noted for consideration during future development of the Site: On-Site • A former water well located on the southwestern portion of the Site does not appear to be properly abandoned. A water well not properly abandoned can pose an environmental concern by acting as a direct conduit for contaminants that are dumped or spilled in or near the well to impact groundwater beneath the Site. Water wells that are not to be used must be properly abandoned in accordance with the State of California Department of Water Resources and San Joaquin county regulations.