COMPLIANCE INFO_1992 - Laserfiche WebLink

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h� KLEINEELDER Kjeldsen-Sinnock and Associates prepared a master storm drainage plan for the Stockton Metropolitan Airport in 1985. That plan looked at the present and future drainage requirements of the airport as well as the business park. The report states that the existing drainage channel crossing the J -M Mfg. site is inadequate in cross-section to accommodate the increased flows expected to be generated by future development. A design was presented in the report that solves the capacity problem. Drainage from the business park and the airport would be collected in detention ponds at the south west corner of the business park and then pumped via a force main to North Littlejohn Creek. The channel crossing the J -M 'Mfg. site would be abandoned. San Joaquin County Department of Public Works (Mr. Tom Iwamyia) was contacted to get an update on the proposed master plan. Tom said that the plan was ultimately rejected because of concerns that the detention basin would attract birds that would interfere with airport operations. Due to economic issues, a revision to the plan has not been prepared and Mr. Iwamyia does not foresee any activity in the foreseeable future to redesign the present storm water drainage system. J -M Mfg. has expressed an interest in replacing the channel with a buried pipe to decrease maintenance costs and to enhance the value of the western parcel that they plan to sell. Kleinfelder contacted a number of agencies to find out what would be required to permit such a project. San Joaquin County (Mr. Iwamyia) stated that a detailed study of drainage in the area in order to provide a basis for sizing the pipe. In addition, the County said that an EIR may be required for the project. Since the channel is unlined and supports flora and fauna, the Department of Fish and Game (F&G) and the US Army Corp of Engineers (ACOS) were contacted to find out if permits were needed. Both F&G and the ACOE will require submission of applications for them to assess the project site and decide if any additional Ipermitting will be required. ' 6.3.2 Configuration There are a number of uncertainties associated with preparing a storm water drainage plan for the J -M Mfg. site. These unknowns include: ■ Amount of asbestos that will be present in runoff after capping and soil remediation. ■ The contribution of channel sediments to asbestos in surface water. CR14-92-12 Page 31 of 39 24-220109-1709 Copyright 1992 Kleinfetder, Inc. w�