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EIAMid Term Exam 1 Dec 2020

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ENGINEERING FACULTY

DEPARTMENT OF ENVIRONMENTAL ENGINEERING


Year: 2020-2021 Semester: Autumn
Course Name: Environmental Impact Assessment
MIDTERM EXAM QUESTION-ANSWER SHEET
SIGNATURE: EXAM DATE:
INSTRUCTOR’S TITLE & NAME: Prof. Dr . Ha sa n G öks el Öz di l ek Dec. 1, 2020
Göksel Ozdilek

SIGNATURE: EXAM
STUDENT’S NAME/SURNAME: DURATION:
STUDENT ID #: 120 min.
Question 1 2 3 4 5 6 7 8 9 10 11 TOTAL POINT:
Point /25 /25 /25 /25
Prog. PO2, PO2, PO7, PO7,
Outcomes PO3 PO3 PO8 PO8

1. One industrial plant emits 10 g per hour of tri methylamine from a smokestack 15 m high with zero
plume rise. The lowest concentration of trimethylamine that the average human being can detect is
5*10-7 g/m3. If the wind is blowing 2 m/s at 10 m anemometer height on a totally overcast night. What
is the maximum distance in the exact downwind direction at which one can smell the industrial plant?
(This concentration corresponds to 0.02 parts per billion).
2. The traffic and air pollution data gathered in a freeway to evaluate whether the pollution affects an
animal shelter 50 m away from the freeway border. The traffic noise data are tabulated below.
Calculate L10, L50, and L90 as well as NPL (noise pollution level) in dBA. Is it larger than 75 dBA?
Time (seconds) dBA
10 71
20 75
30 70
40 78
50 80
60 84
70 76
80 74
90 75
100 74

Total vehicle traffic is 40000 cars per day. Maximum hourly traffic (noon time) is twice higher than
the average hourly traffic. Each car emits 1.0 g/km NOx and 3.5 g/km CO. The main wind is blowing
at 2.4 m/s across the freeway towards the animal shelter on a clear summer day noon. Estimate NOx
and CO concentrations at the animal shelter.
3. What are the differences between scoping and screening in EIA procedure?
4. What are the effects of noise pollution in metropolitan cities and elderly? Explain in detail.

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