Agenda - 05-22-1989 - Laserfiche WebLink

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- - - - - - - - 42 Mr. Marvin E. Collins May 3, 1989 Page 2 • suggestion that OWASA be the lead agency for such a program. The Hazen and Sawyer report states: "If the reliability of alternative ' treatment systems is to be improved, it is clear that the greatest opportunity lies in the area of improved operations and maintenance." The report goes on to suggest that the County consider taking over the responsibility for operating and maintaining alternative systems. The County's April 3, 1989 Watet & Sewer Policy notes that "adequate long-term operation of such [alternative] systems must be assured," and states the County's intent to "evaluate the feasibility of establishing an inspection and monitoring program for alternative wastewater treatment systems"; to "explore a' bonding requirement"; and, "to explore alternative institutional, arrangements for shifting the operation and maintenance of such systems into the public domain." . OWASA staff considers it premature to issue a Special Use Permit for McLennan's Farm before the County fulfills those recently adopted policy commitments. The applicant's present proposal for a private vendor to post a $10,000 bond, and to operate the community LPP system through a contract with the homeowners' association does not provide adequate assurance of reliable long-term performance. Ten thousand dollars will not begin to cover the repair costs for the types of problems noted in the Hazen and Sawyer report. It is evident to OWASA staff that there now exists a substantially greater body of technical information and policy consensus than there was 15 months ago-when we last reviewed the McLennan's Farm project. The proposed wastewater system still suffers from two major deficiencies: • • The lack of an institutional arrangement to assure reliable long-term operation and maintenance by a public entity; and, • The risk of an unproven, innovative technology in an • environmentally sensitive water supply watershed. • Overall Site Plan Considerations Camp Dresser & McKee's final University Lake Watershed Study report includes policy and administrative recommendations based on their technical analysis of the water quality effects of different land use scenarios. From a water quality standpoint, CDM's preferred . approach is a 5-acre minimum residential lot size and a 4 percent impervious surface limit throughout the watershed. Such a pattern would not require structural stormwater controls (wet ponds) to meet the recommended University Lake water quality goals.