COMMISSION

conducting a variety of monitoring studies that examined either watershed processes or the
changes over time in the form of fabricated features.
Examples of studies that attempted to better determine the general nature of the SVRA’s
watersheds included measurement of landslide complex movement rates; measurement
of stream bank erosion rates; and surveys of the longitudinal or cross-sectional profiles of
streambeds. These studies incorporated:
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trail erosion studies to help calibrate the trail assessment rating system, and
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sediment basin profile surveys using photogrammetry to measure the amount of
material captured and stored in sediment detention basins.
A collection of monitoring studies successfully produced and established a baseline that
SVRA resources staff could use for future monitoring and assessment efforts.
Moving forward, it was apparent that the valued partnership between CSU Monterey Bay
and Hollister Hills SVRA warranted a renewal of the contract between the two agencies for
another five-year cycle. The renewed program will use the results gained from the baseline
water quality monitoring study and apply it towards the assessment of erosion and sediment
control management strategies employed by SVRA resources staff. In addition, the program
ensures the continued fostering of teaching and learning opportunities for CSU Monterey
Bay faculty and students.
Air Quality Monitoring Program
Hollister Hills SVRA is entering its fifth year of 24-hour Particulate Matter 10 (PM10)
monitoring at three locations on the boundaries of the SVRA. For several years, baseline
data was collected using a Mini-Vol PM10 monitor. The data from the Mini-Vol, together
with consultation with the Monterey Bay Unified Air Pollution Control District (APCD), led
to strategic placement of the three permanent 24-hour E-BAM PM10 monitors. The SVRA
contracts with Monterey Bay Unified APCD for consultation, training, and calibration of the
monitors.
In January 2016, the SVRA entered into an expanded contract that also analyzes daily
PM10 reports and communicates with the SVRA on any spikes that occurred. Hollister Hills
SVRA staff conducts investigations to determine the source of the spike, and if attributed
to OHV activity, implements BMPs from the Dust Management Plan to minimize future
occurrences. Hollister Hills SVRA continues to be within the State Ambient Air Quality
Standard of 50 micrograms per cubic meter, average, per 24-hour period.
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California State Parks, Off-Highway Motor Vehicle Recreation Commission