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KLEINFELDER <br /> File No. 20-3978-O1.W10 <br /> July 26, 1997 <br /> 5. The extent of soil and groundwater contamination in the vicinity of the above ground diesel <br /> fuel storage tank should be further evaluated. Kleinfelder recommends installing one <br /> groundwater monitoring well in the vicinity of boring 12-42 to confirm the results of the <br /> Hydropunch IITm groundwater sampling. Additional exploratory soil/ Hydropunch IITM <br /> borings should be advanced to evaluate the lateral and vertical extent of contamination. <br /> 4.12 Underground Structures (File No. 20-3978-O1.W13) <br /> Based on the results of the subsurface assessment conducted in this area, Kleinfelder had the <br /> following recommendations detailed in our report "Limited Phase II Soil Assessment, <br /> Underground Structures and Beet Seed Warehouse, (phase I ESA Recommendation Numbers 13 <br /> and 2), Former Spreckels Sugar Plant No. 2, 18800 South Spreckels Road, Manteca, California, <br /> (APN#221-180-04)"dated February 24, 1997: <br /> 1. The existing soil cuttings (a.k.a.... drilling returns) should be evaluated and properly <br /> disposed of by Atherton-Kirk. Kleinfelder can assist the Atherton-Kirk in that disposal <br /> at the Client's request at an additional cost. <br /> 2. The equipment rinseate should be properly evaluated and disposed of by Atherton-Kirk. <br /> Kleinfelder can assist Atherton-Kirk in that disposal at the Client's request at an <br /> additional cost. <br /> 3. Kleinfelder recommends further investigation of the south end of the factory building <br /> foundation to determine the extent of contamination. Subsequent mitigative measures <br /> may be necessary. A proposal for the additional investigation has recently been <br /> approved by Atherton-Kirk. <br /> 4. With regards to the former underground beet flume, drainage canal, and beet seed <br /> warehouse, Kleinfelder suggests no further clean-up measures or investigations be <br /> conducted. Kleinfelder recommends that a copy of this report be submitted to the <br /> RWQCB and PHS/EHD for their review and comment. Additionally, Kleinfelder <br /> recommends that a letter of"no further action"be requested from both agencies for these <br /> sites. <br /> 5. Atherton Kirk Development should be aware of the presence of the factory drains and waste <br /> water lines, and contact Kleinfelder if any indications of contamination (such as soil <br /> discoloration or unusual odors) are discovered in these areas during or after the demolition of <br /> the factory buildings and associated structures. <br /> 20-3978-01.WIO/2017LI55 Page 28 of 50 Copyright 1997, Kleinfelder. Inc. <br />