2005 - Door County Web Map

Impact of Wind and Waves
In 2005 there was no correlation found between elevated E. coli counts and wind. There was no
correlation between elevated E. coli counts and wave height in 2005.
Impact of Birds
There was no correlation between bird counts or the amount of bird waste and E. coli in 2004 or
2005, indicating that the number of birds present at the time of water sampling, and the amount
of bird waste calculated in the survey may not have a significant effect on the E. coli
concentrations at the beach (Table 7 and Table 8, pg 66).
Summary
Overall the tests and data analysis done thus far for the beach contamination source identification
project at Percy beach do not determine the source(s) of E. coli contamination. The immediate
potential sources of E. coli at Percy beach are re-suspension of potentially contaminated near
shore beach sediments caused by wave activity. Potential E. coli in the beach sediment is most
likely from fecal droppings in the beach sediments and on the parking lot. There is also a
potential for individual onsite private wastewater treatment systems, in close proximity to the
beach, to be failing and contributing E. coli to beach sediment and water.
Recommendations for additional source identification work:
Test the identity of E. coli in the near shore beach sands and in Cladophora algae mats if mean
E. coli level increases, or if beach swimming advisory and closures increase. Continue avian
counts during the beach monitoring E. coli sample collection, and discontinue the avian waste
survey.
Beach management recommendations and requirements for the 2006:
There are no beach management recommendations or requirements at this time.
Gialison Park Beach
Public Health Beach Monitoring Results
In 2003 there were 38 samples for E. coli taken in the monitoring program at Gialison beach,
and none of the E. coli tests exceeded the advisory level (235 E. coli /100ml of water) or
closure level (1,000 E. coli /100ml of water) (Table 1, pg 38 and Figure 2, pg 41). In 2004 there
were 10 E. coli samples taken and none of the E. coli levels were over the advisory level. In
2005 there were 14 E. coli samples taken and none of the E. coli levels were over the advisory
level.
Physical Features
Gialison beach has sand with a % slope. Surveys of the physical characteristics of Gialison
beach show that the beach has no storm water pipes or streams that outlet water to the beach or
surrounding bay. Water runoff from the parking lot and connecting streets outlets to the beach
water during moderate to heavy rainfall. There are no bathroom facilities at this beach. The
wastewaters from the residents that are within the entire bay of the beach are treated with onsite
private wastewater treatment systems.
Impact of Wind and Waves
In 2005 there was no correlation found between elevated E. coli counts and wind. There was a
correlation between elevated E. coli counts and wave height in 2005 (Table 6, pg 60).
Impact of Birds
There was no correlation between bird counts or the amount of bird waste and E. coli in 2004 or
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