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MTBE was detected in each sample analyzed, ranging in concentration from 6.4 to 86 <br /> micrograms per liter (jeg/L); the 86 tig/L detected at SB-02 is above the water quality goal of <br /> 35 µg/L, established for this constituent. <br /> ' I <br /> i <br /> 5.3 Sanborn Map Review and Records Research Results <br /> E In accordance with the Workplan, Terranext submitted a records research request to the <br /> County and to the California Regional Water Quality Control Board, to obtain information on <br /> t i <br /> I sites in the vicinity of the Property and Parcels 5, 6, and 7,F which currently are or have been <br /> the subject of environmental investigations. Additionally, Terranext obtained, for review, <br /> available Sanborn maps with coverage for the Stockton Savings .B nk and Parcels 5, 6, and <br /> 7. The results of the Sanborn map review and records research are discussed below. <br /> 5.3.1 Sanborn Map Review <br /> Sanborn maps with coverage of the Property and/or Parcels.'�5, 6, :and 7 were reviewed for <br /> the purpose of 1) locating the gas and oil structures initially!identified in the ESA (Section <br /> 3.0); and 2) identifying any additional structures formerly IC cated!Ion the Property and/or <br /> Parcels 5, 6, and 7 and adjacent parcels which would indicate a potential environmental <br /> concern. Mas with appropriate covera a were available for the ears 1895, 1917, 1950 and <br /> Pg y <br /> 1972. In summary: <br /> * 1895 map identifies: Simpson and Garey Lumber Yard on Parcels 4 <br /> and 7; and California Wharf and Ware House Company on Parcel 7. <br /> I <br /> il <br /> * 1917 map identifies: California Wharf and Warehouse Company on <br /> � r <br /> I � <br /> Parcel 7; and three gas and oil structures on ParceF7 (northern extent). <br /> i <br /> i <br /> 868 OQ1.rpd04-29-971u/keydara/repons 19 <br /> N <br />