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We in KLEINFELDER File No. 20-3978-O1.W10 July 26, 1997 3. Kleinfelder does not recommend any further investigation or clean-up for the proposed 25 acre residential development at the former Spreckels site. However, Kleinfelder recommends that a copy of this report be submitted to the RWQCB and PHS/EHD for their review and comment. Additionally, Kleinfelder recommends that a letter of "no further action" be requested from both agencies. This report and the conclusions and recommendations presented are subjected to the "Limitations" presented in Chapter 7 of this report. 4. No Purgeable or extractable petroleum hydrocarbons, BTEX compounds, or MTBE were detected in the soil samples collected and analyzed within the former pipeline area. 5. No further assessment is recommended along the former steam/fuel pipeline. It is recommended that monitoring well MW 7-36 be properly abandoned when it is no longer in use(if it isn't used for depth the water measurements). 6. Low levels of the 4,4'-DDT (a pesticide), 4,4'-DDE (a degradation product of DDT), and 2,4-DB (a herbicide) were detected in 11 of the 25 soil samples analyzed for pesticides and herbicides. The levels detected are orders of magnitude below the preliminary remediation goals established for these compounds by the U.S. Environmental Protection Agency(EPA). PRGs are health-based concentrations which, if exceeded, may present a concern to EPA, and may require remediation. However, because the concentrations detected were below the PRGs, Kleinfelder does not recommend additional evaluation of the orchard area. Additionally, it is Kleinfelder's experience that the concentrations present are consistent with much of the agricultural(and formerly agricultural) land in the Central Valley of California. 4.8 Geophysical Investigations (File No. 20-3978-01.WR8) Based on the results of the subsurface assessment conducted in this area, Kleinfelder had the following recommendations detailed in our report "Geophysical and Trenching Investigation, (Phase I ESA Recommendation Nos. 4, 6 and 20), Former Spreckels Sugar Plant No. 2, 18800 South Spreckels Road, Manteca, California"dated February 24, 1997: 1. Kleinfelder does not recommend any further investigation of the four subsurface anomalies identified by Norcal Geophysical. 2. Kleinfelder recommends that a copy of this report be submitted to the RWQCB and PHS/EHD for their review and comment. 20-3978-01.W10 12017L155 Page 24 of 50 Copyright 1997,Kleinfelder,Inc.