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Chapter 1

EESA01H3 Chapter Notes - Chapter 1: Coliform Bacteria, Sample Maximum And Minimum


Department
Environmental Science
Course Code
EESA01H3
Professor
Carl Mitchell
Chapter
1

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Assignment 3
1.
3.7 degrees Celsius
7.75 pH
430.6 electrical conductivity
oxygen concentration 95
Sediment paper weight = 0.1226g, 0.1244g
Colonies concentration 85
2.
Charts used for following are found in appendix E.
Test
Unit
Quality value
Weighing factor
Total
Dissolved O2
% saturation
98
0.22
21.56
Coliforms
Colonies/100Ml
0
0.18
0
pH
pH
90
0.08
7.2
Temperature
Degrees Celsius
63
0.11
6.93
Suspended
sediment
concentration
Mg/L
76
0.23
17.48
Electrical
conductivity
µS/cm
100
0.18
18
3.
85/100mL
With the assumption that the coliform measurement was presented equal to the number of E coli
in the creek then it would not be safe to swim or do any other recreational activity. The coliform
concentration found in the sample is close to 3000 which exceeds the guideline values, in this case a
single sample maximum concentration has guided values of 400 E. coli/100 mL. It is clearly seen that
the collected sample exceeds this guideline. For these reasons it would not be adequate for recreational
activities to take place at Highland Creek
4.
Highland Creek watershed has little control of storm water, in order to improve water quality.
Highland creek consists of multiple paved surfaces like roads, parking lots and roofs. With heavy rainfall
or high volumes of water can result in the slow deterioration and damage of certain habitats in
surrounding areas. These type of water run offs can contain pollution such as oils, garbage or pesticides
that would enter watercourses (issues 2018). The score for the water quality was a 71.17 which is
marked as good, to improve this quality I would choose the factor of Ph as a change in Ph can alter the
amount of coliform in the water in order for it to be sustainable for recreational activities.
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