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Summary of Relevant Requirements for Comprehensive Monitoring Plan
Placer County and Town of Truckee
Attached is a summary of requirements considered most relevant to the task of
developing comprehensive monitoring plans for the Town of Truckee and Placer
County jurisdictions. The comprehensive monitoring plan should address the
following requirements as appropriate to each entity:
1. the MS4 permit, Attachment 4 to the permit, and the 13267 letter that
supplements the permit provisions;
2. cumulative impacts monitoring associated with the Martis Valley
Community Plan EIR mitigation requirements;
3. the adopted Squaw Creek TMDL; and
4. the pending middle Truckee River TMDL.
Water Board staff considered requirements set in the MS4 general permit,
Attachment 4 to the permit, the 13267 letters requesting additional monitoring to
demonstrate the effectiveness of the Storm Water Management Programs
(SWMPs), the adopted Squaw Creek TMDL, and the pending TMDL for the
middle Truckee River watershed. Additional tracking or monitoring provisions
may also be required under the MS4 permit and should be addressed in the
SWMPs as necessary.
Staff did not provide specific guidance on the requirement for Placer County to
develop a cumulative effects monitoring strategy for the Martis Valley Community
Plan because this is a commitment made by Placer County under the
Environmental Impact Report for the area. However, certain monitoring elements
in the attached summary may help satisfy cumulative effects monitoring needs
and are noted in the table. In general, staff believe that Placer County needs to
develop an approach that includes measures that prevent impacts (e.g. develop
design standards based on hydro-modification modeling) in contrast to
monitoring that may detect impacts after development has occurred.
The attached summary provides suggestions for potential monitoring approaches
to address the key requirements. It does not include specific locations,
frequencies, or timing for monitoring. Staff expects the Town of Truckee and
Placer County to conduct their own analysis of the requirements and approaches
in developing the monitoring plans, and to propose appropriate strategies based
on the characteristics of the storm drain systems, the pollutants of concern, and
potential for water quality impacts. We understand that certain elements may be
dependent on the outcome of other tasks (e.g. drainage system mapping) and
that the complete monitoring plan may need to be developed in a sequential
fashion. Where necessary, the permittees should identify what tasks may be
dependent on others and specify the sequence and schedule for completing all
required plan elements.