FEIS - Tahoe Regional Planning Agency
FEIS - Tahoe Regional Planning Agency
FEIS - Tahoe Regional Planning Agency
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RESPONSE TO COMMENTS ON THE DEIS<br />
B o u l d e r B a y C o m m u n i t y E n h a n c e m e n t P r o g r a m P r o j e c t E I S<br />
should erosion occur. e) The parameters monitored will be finalized during project<br />
permitting. The parameters listed are recommended as typical water quality<br />
constituents for stormwater monitoring programs.<br />
Comment 335-y: Comment Summary - Describe storm water, TMDL, bio-retention, and fine sediment<br />
monitoring techniques, length of time, and compliance standards, adaptive strategies,<br />
and monitoring report process.<br />
a) The DEIS makes recommendations, but TRPA as the lead agency reserves the<br />
regulatory ability to amend these recommendations. Given that no codified regulation<br />
by TRPA or NDEP currently requires the monitoring of fine sediments nor are<br />
standardized protocols agreed upon at this time, the Project commits to monitoring of<br />
fine sediments as specified by TRPA or future TMDL directives for the Lake <strong>Tahoe</strong><br />
Basin. b) The duration of post-project monitoring will be determined during project<br />
permitting. The Project is required to meet TRPA discharge limits listed in Table 4.3-<br />
2. c) Alternatives C and D will be required to meet TRPA discharge standards. Net<br />
gain is determined by comparing the total volume of runoff and the associated load<br />
potentially carried by that runoff. See Appendix AB for a comparison of the project<br />
area with treatments sized to capture the 20yr/1hr storm total runoff volume as<br />
compared to the 100yr/1hr storm total runoff volume. d) In reference to Alternatives<br />
C and D, the stormwater treatment systems will capture and infiltrate up to the<br />
100yr/1hr storm total runoff volume, including the "first flush". The stormwater<br />
monitoring program will be developed based on the selected Alternative. The DEIS<br />
does not state that grab sampling is inadequate for monitoring, the DEIS clarifies that<br />
the results and conclusions are based on 6 storms, which is a small sample size. The<br />
supplemental analysis included in Appendix AB incorporates an additional 12 storm<br />
events (DRI) in addition to the 6 storms sampled during pre-project monitoring to<br />
characterize existing conditions for the project area. Automated samplers will be<br />
employed if determined by TRPA to be appropriate during project permitting. e)<br />
Boulder Bay will be responsible for implementing "adaptive strategies" if determined<br />
necessary by post-project monitoring results. f) The post-project monitoring program<br />
will be developed during permitting of the selected Alternative. Yes, monitoring will<br />
measure the success of the Project. g) The duration of post-project monitoring will be<br />
determined by TRPA, the regulatory agency, during permitting of the selected<br />
Alternative. Monitoring reports will be available for review by the public as part of<br />
public project file.<br />
Comment 335-z: Comment Summary - App. G needs to support calculations, underlying assumptions.<br />
See DEIS Appendix G and Table 1 of Appendix AB. The calculations are presented<br />
in table format with reduction assumptions clearly presented. The supplemental<br />
surface water quality analysis presented in Appendix AB models existing conditions,<br />
E20, C20 and C100 (please see response to comment 79-g for terms defined) for<br />
analysis of the project area under a variety of water year conditions.<br />
Comment 335-aa: Comment Summary - In App. G, what is meant by a BMP contributing area? Clarify<br />
table assumptions and definitions underlying the calculations.<br />
The purpose of the calculations are to disclose the total contributing area and the<br />
calculations made to reduce the volume of runoff from these contributing areas.<br />
DEIS Appendix G presents the basic components used to design the stormwater<br />
treatment systems and are presented in the DEIS as supporting calculations for the<br />
summary tables (Tables 4.3-8 through 4.3-12) presented for the impact HYDRO-3<br />
analysis. Table 1 added in Appendix AB further details these calculations for the<br />
SEPTEMBER 8 , 2010 HAUGE BRUECK ASSOCIATES PAGE 8- 149