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Surface and Subsurface Coniination Report—APN: 157-243-18--To creatte 1!lve(5)lot size parcels of about equal size, each containing at least 7,680 sq. ft., out of a larger 38,531 sq.ft. parcel. 3.0 Identification Of All Past And Current Sources Of Contamination 3.1 Method Of Research: The methods used to research, investigate and to know the potential above and below ground sources of contamination at the project site has been a 3 site reconnaissance and field search, and research and study of San Joaquin County Assessor, Recorder,Environmental Health Department, and the Agricultural Commissioner's Office records. 3.2 Site Reconnaissance And Survey: On June 6, 2004,I conducted a property field reconnaissance and search to determine if there were above ground fuel storage tanks, oil drums,kerosene, other petroleum products and/or other possible contaminant receptacles situate on the subject property that could contribute to contamination. No vent pipes or depressions were noted that would indicate any underground tanks existing on the subject property. Also the San Joaquin County Public Health Services Underground Site Mitigation Database List,dated 01/28/03, binder available in the San Joaquin County Environmental Department was reviewed and no underground tanks were listed on the subject property. However, no subsurface excavations were performed in my reconnaissance and survey of the subject property. The conditions seen and noted are best described and recorded by the colored photographs I took and are available for viewing in Appendix I that is attached to and made an integral part of this report .A total of twenty-one(21) photographs were taken. The locations the photographs were taken at are denoted by an alphabet letter and the direction viewed are denoted by an arrow with the sequence in which the photographs were taken viewed by a number at the end of the arrows and all are shown on the attached Photograph's Views Schematic Sheet. The photographs in the appendix are correlated to the schematic sheet by referencing each photograph with an alphabet letter and the sequence number. The alphabet letter denotes the location the photograph was taken at and the number indicates the sequence in which the photo was taken. 3.3 Possible Septic Past On-Site Contamination: Existing San Joaquin County Environmental Health Department records of sixteen(16) septic system permit installations along South Hinkley Avenue were reviewed and are summarized in the attached"San Joaquin Co. Environmental Health Department Septic Permit Records Study", which contains permit numbers, dates, addresses, soil type and leach field,pits and sump system installations information. The records reviewed covered about a twenty- four(24)year period from May 5, 1955 through February 22, 1979. One (1)of the records were for making repairs to the existing system. Eight(8)of the records were for additions to existing system installations and seven(7) records were for entirely new septic systems. Pit systems were the predominate type of new septic system installations and historically have served well over the years. TJS Properties Inc., Stan Nixon,Agent, Stockton, California 95215(Owner)4408 East Fremont Street (PrnixY Citral 511 Cnnth Hinkley Avnnnr Ctne.ktnn r'.alifnmia 9577 5 4