Attention Windsurfers; SBSA Update

From: Duane Sandul (sandul@azstarnet.com-DeleteThis)
Date: Tue Apr 15 1997 - 08:19:48 PDT


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Date: Tue, 15 Apr 1997 08:19:48 -0700
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From: Duane Sandul <sandul@azstarnet.com-DeleteThis>
Subject: Attention Windsurfers; SBSA Update
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To: Windsurfers, Interested Parties
Fm: Duane Sandul (415/595-0450) and Ken Kaufman (SBSA, 415/594-8411, ext.
128)

SBSA Coliform Study update through 4/3/97

Summary & Interpretation
During the past several weeks SBSA has maintained the discharge of fecal
coliform bacteria in the 2-6 range. The bacterial levels on the Bay have
contnued to decline during this period and are currently in the 2-3 range (2
is the detection limit of our test procedure) which is almost to the
background leves of 2 we saw late last summer and early fall before the rains
began.

The results from the Bay remain way below the water quality objectives.

Details
All units are MPN/100mL (ie. most probable number of fecal coliform bacteria
per 100 milliliters of sample) expressed as a 5-day log mean. The water
quality objective is 200 MPN/100 mL (5-day log mean) for water contact
activities and 500 MPN/100mL (5-day log mean) for non-water contact
activities.

update for samples collected through: 3/11/97
4 MPN in SBSA effluent
12 MPN above SBSA outfall
5 MPN at 500 yards southeast of outfall
10 MPN at 500 yards northwest of outfall
5 MPN at 1000 yards northeast of outfall

update for samples collected through: 3/18/97
        6 MPN in SBSA effluent
         7 MPN above SBSA outfall
         5 MPN at 500 yards southeast of outfall
        15 MPN at 500 yards northwest of outfall
         4 MPN at 1000 yards northeast of outfall

update for samples collected through: 3/20/97
        4 MPN in SBSA effluent
         6 MPN above SBSA outfall
        4 MPN at 500 yards southeast of outfall
        13 MPN at 500 yards northwest of outfall
        3 MPN at 1000 yards northeast of outfall

update for samples collected through: 2/20/97
        2 MPN in SBSA effluent
         10 MPN above SBSA outfall
         7 MPN at 500 yards southeast of outfall
        8 MPN at 500 yards northwest of outfall
         6 MPN at 1000 yards northeast of outfall

update for samples collected through: 3/25/97
        3 MPN in SBSA effluent
         4 MPN above SBSA outfall
         4 MPN at 500 yards southeast of outfall
        8 MPN at 500 yards northwest of outfall
         3 MPN at 1000 yards northeast of outfall

update for samples collected through: 3/27/97
        3 MPN in SBSA effluent
         3 MPN above SBSA outfall
         3 MPN at 500 yards southeast of outfall
        4 MPN at 500 yards northwest of outfall
         3 MPN at 1000 yards northeast of outfall

update for samples collected through: 4/2/97
        2 MPN in SBSA effluent
         3 MPN above SBSA outfall
        3 MPN at 500 yards southeast of outfall
        3 MPN at 500 yards northwest of outfall
         2 MPN at 1000 yards northeast of outfall

update for samples collected through: 4/3/97
        3 MPN in SBSA effluent
         2 MPN above SBSA outfall
        3 MPN at 500 yards southeast of outfall
        3 MPN at 500 yards northwest of outfall
         2 MPN at 1000 yards northeast of outfall



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