NC c well
問題一覧
1
5 or more
2
6 hours
3
annually
4
3 years
5
opporator in responsible charge
6
50 miles
7
it comes off a longer main and is metered separately
8
1000’
9
20
10
40
11
6”
12
2
13
3
14
30” or below the frost line wichever is deeper.
15
12”
16
10 feet horizontaly
17
water on top of sewer is preferred with 18” of separation
18
4 feet
19
3 feet
20
5’
21
public water system
22
community water system
23
maximum contaminate level
24
addition of chlorine and ammonia together
25
yellow/ green in color
26
2.5x
27
450x
28
Bleach
29
8”
30
5 years
31
12 years
32
acidic
33
6.5-8.5
34
100’
35
isconstructed to water main standerds
36
300 feet
37
it will convert to hypochlorous acid (HOCI)
38
when the chlorine demand is met and there is chlorine left over
39
0.2mg/l
40
0.2mg/l
41
1.0ppm
42
no free CL trace but a trace of free ammonia
43
indicator organism
44
incubated at 35 Celsius for 24 hours
45
24hours
46
ultraviolet light
47
positive displacement pump
48
12”
49
6” minimum
50
7days
51
20’
52
10’
53
43’ minimum
54
4”
55
3’
56
18”
57
a trace of something
58
A facility alters the physical or chemical characteristics of the water.
59
6 hours
60
at least 50% of duty’s consist of active operation at a system with chem treatment or 2 or more wells
問題一覧
1
5 or more
2
6 hours
3
annually
4
3 years
5
opporator in responsible charge
6
50 miles
7
it comes off a longer main and is metered separately
8
1000’
9
20
10
40
11
6”
12
2
13
3
14
30” or below the frost line wichever is deeper.
15
12”
16
10 feet horizontaly
17
water on top of sewer is preferred with 18” of separation
18
4 feet
19
3 feet
20
5’
21
public water system
22
community water system
23
maximum contaminate level
24
addition of chlorine and ammonia together
25
yellow/ green in color
26
2.5x
27
450x
28
Bleach
29
8”
30
5 years
31
12 years
32
acidic
33
6.5-8.5
34
100’
35
isconstructed to water main standerds
36
300 feet
37
it will convert to hypochlorous acid (HOCI)
38
when the chlorine demand is met and there is chlorine left over
39
0.2mg/l
40
0.2mg/l
41
1.0ppm
42
no free CL trace but a trace of free ammonia
43
indicator organism
44
incubated at 35 Celsius for 24 hours
45
24hours
46
ultraviolet light
47
positive displacement pump
48
12”
49
6” minimum
50
7days
51
20’
52
10’
53
43’ minimum
54
4”
55
3’
56
18”
57
a trace of something
58
A facility alters the physical or chemical characteristics of the water.
59
6 hours
60
at least 50% of duty’s consist of active operation at a system with chem treatment or 2 or more wells