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consistent cultivation of the subject property, the aerial photographs do depict what appear to be two residential structures in the southeast and south-central portions of the Site and a possible barn and storage of trailers and other working areas that may have been the areas where agricultural constituents may have been stored or mixed. The depiction of these features is best observed in the 1982 aerial photograph included in Appendix E. On February 18, 2016, the DTSC provided Partner with two California Department of Water Resources (DWR) Water Well Drillers Reports for two municipal water wells within the City of Tracy. The City of Tracy maintains Well #7 at the Tracy Ball Park near North Tracy Boulevard and West Grant Line Road approximately 2700 feet south of the Site and Well #4R at Lincoln Park near Holly Drive and West Eaton Avenue approximately 7500 feet southeast of the Site.Well #7 is 1148 feet deep with perforations beginning at 337 feet bgs and Well #4R is 1000 feet deep with perforations beginning at 490 feet bgs. Based on these public supply wells being significantly upgradient of the Site and given the relatively deep perforations, it is not likely the operation of these wells would have a discernable influence on the unconfined water table underlying the Site. The DTSC also provided two May 3, 1991 DWR Water Well Drillers Reports associated with the documented destruction of two water wells that were within the southeastern portion of the Site and appear to be associated with the residential structure present in that area of the Site since at least 1963. The two DWR reports are included in Appendix E and are accompanied by a sketch showing the locations of the two wells relative to existing shopping center structures and approximately 225 feet east of the Quality Dry Cleaners suite. Both Well #1 and Well #2 were constructed with an 8-inch diameter steel casing with depths of 120 feet bgs and 75 feet bgs, respectively. According to the DWR reports, each well was bailed, perforated from 15 to 40 feet bgs and filled with tremied neat cement from the bottom of the wells. Three feet of well casings were removed and the excavations filled with native soil to grade. The water level was reported to be 6 feet bgs. Based on the description of the well destruction methodology, it appears the two water wells were property destroyed in conformance with DWR standards. Given that observation and in consideration that the two former water wells were approximately 225 feet in the presumed cross gradient direction relative to the dry cleaners suite, it would appear these two former wells have not provided a conduit to deeper portions of the aquifer or otherwise influenced the migration of constituents potential concern associated with the Quality Cleaners. The following observations are based on view of the aerial photographs in Partner's December 9, 2015 Phase I ESA report: Sampling and Analysis Workplan Tracy Corners Shopping Center 3225 North Tracy Boulevard Tracy,California 95376 Partner Project Number SM14-129814 Docket Number HAS-VCA 14/15-108 August 15,2016 Page 9