February 4,
2004
Addendum to Preliminary Water Quality
Screening Plan
2003/04 Wet
Season
January 26,
2004
Lake Merced
Restoration – Phase 2 Pilot Stormwater Enhancement Project
Prepared
by the North San Mateo County Sanitation District
and the
San Francisco Public Utilities Commission
with
assistance from EOA, Inc.
Page 2.
Paragraph 5. As stated, “The actual number of sampling episodes may
vary, depending on factors such as weather patterns and the
availability of staff and equipment.” Include
a new clarifying last sentence as follows: “However, in all cases at
least one set of lake samples will be collected from each storm.”
Page
2. Paragraph 6. As stated, “Water quality samples will be collected
from the lake as soon as possible after the diversion is closed and/or
the end of the storm event but no longer than 48 hours after the
diversion is closed.” Include a new 3rd
sentence as follows: “If the results for open water samples LM-4,5,or 6
exceed the maximum levels listed on Table 1, then additional sampling
rounds will be conducted until the levels have dropped below the
maximum levels.”
Figure
1. Add a new sampling station in the wetlands area (LM-Wetlands) where
a daily bacteriological sample will be collected for four consecutive
days following each of the pilot discharge events.
Attachment 1, Public Notice. Revise paragraph 2 to read as follows: This demonstration involves using a vegetated area along a small section of the southwestern shoreline of South Lake Merced as a stormwater treatment wetland.