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the kelp bed for extended periods, the rate of placement of sand will be modified so that
large, long lasting turbidity plumes are no longer created. The criterion will be that
turbidity plumes that extend to the kelp beds approximately 1,000 ft. offshore should
not persist for a period of more than 6 days. Because of this monitoring and response
plan, turbidity created by beach fill will not have a significant effect on biological
resources.
Turbidity plumes may interfere with the foraging of seabirds including the California
brown pelican, elegant tern, and double-crested cormorant. Turbidity plumes would
affect temporarily a relatively small portion of the foraging area for these species.
Impacts of turbidity on seabird foraging would be adverse but insignificant.
Oil Piers is not known as an important beach for grunion spawning. However, grunion
may at times spawn on any sandy beach. If beach fill occurs during the summer,
grunion could potentially suffer an adverse impact from burial of their eggs by sand
placement or damage to the eggs by project equipment. To avoid impacts to grunion,
grunion spawning will be monitored immediately prior to and during beach fill operations
if the project is conducted during the grunion spawning season of March to August. If
grunion are observed to spawn during the nighttime spring high tides immediately prior
to the proposed sand placement or during sand placement operations, all beach fill
activities will be curtailed until after the next spring high tide series when the grunion
eggs will have hatched and been carried into the ocean. In addition, sand berms will be
placed around the spawning area, if possible. The buffer zone would be kept in place
until the next predicted grunion run (about 14 days) to allow for the eggs to hatch and
surveys to show that no subsequent spawning occurred in the area.  With these
measures in place, impacts to grunion spawning will be insignificant.
3.3.4 Surfer's Point
The intertidal and subtidal substrate at Surfer's Point consists primarily of cobble. In the
shallow subtidal, patches of sand are interspersed with the cobble. The small rocks and
cobble at Surfer's Point support a sparse growth of opportunistic algae.  Benthic
communities appear to be disturbed frequently by the movement of the rocks and
periodic scour and burial by sand. Because of the depauperate benthic community
supported by the cobble at Surfer's Point, burial by sand would have an adverse but
insignificant impact. There are no kelp beds or surfgrass or eelgrass meadows in the
vicinity of Surfer's Point. Therefore, turbidity created by beach enhancement in this
area would not have a significant adverse impact on sensitive habitats.
Turbidity plumes may interfere with the foraging of seabirds including the California
brown pelican, elegant tern, and double-crested cormorant. Turbidity plumes would
affect temporarily a relatively small portion of the foraging area for these species.
Impacts of turbidity on seabird foraging would be adverse but insignificant.
38
3208 Bio Report
06/12/02



 


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