HomeMy WebLinkAboutPermit Correspondence 1979-2-21
IOV 5 I 4-
DEPT. OF PUBLIC
SEWER AIR. T.EST
A-Ib
. .-
-
RECOMMENDED PROCEDURE FOR CONDUCTING AIR TEST
.
, ---
1. Plug all pipe ou~lets with suitable test. plugs. Brace each plug
securely.
2. If the pipe to be tested is submerged in ground water, the eleva-
tion of the 'g~ound water above the top of the pipe must be
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of at least
one manhole in each section to be t~sted with n cransparent tube
attached to the nipple in such a manner that the ground water "
elevation may be determined by visual inspection.
For each foot, or fraction thereof, of ground water abave the
top of the low end of the pipe included in the test section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite. .
3. Add air slowly to the portion of the portion of the pipe install-
ation under test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
4. Check exposed pipe and plugs for abnormal leakage by coating with
a soap solution. If any failures are observed, bleed off air and
make necessary repairs.
5. After an internal pressure of 4.0 PSIC or more is obtained, allow
at least two minutes fpr air temperature to stabilize, adding only
the amount of air requIred to maintain pressure.
6. After the two minute period, disconnect air supply.
7. When pressure decreases to 3.5 PSIG, or more, as determined b~
ground water elevations, determine the time in secoads that is
required for a drop of 1.0 PSIG. This time interval should then
be' compared with the time required by specification as coaputed
below.
8. List the size and length of all portions of pipe included in the
test on the table opposite.
9. By use of the nomograph, compute K and C. Use scales d and L, read
'K and C, and enter these values in the table.
10. Add all values of K and all values of C for pipe under test.
11. If the total of all C values is less than one, enter the total of
all K values into the space for "Time Required by S,.cification."
12. If the total of all C values is greater than one. divide the total
of all K values, by the total of all C values, .to get tq. To 1IIIIke
this division with the nomograph, use scales C and K, and read tq.
.
- '-~"""'~~-~~::~'; ':' -~~-.~'~:~, -~.~:~,'
....,~..~:.
.;.
WORKS
REPORT
}J \e~k)
t, 0 p riM L,..'/ I? a-
lCl v-lC
OFFICE FILE:
,. 13. On lines that are tested by air, manholes will be inspected for.
infiltration at a time when ground water is at ~~imum heights.
Observations made at the time of such inspections are to be
entered in the proper spaces below. Such inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
f
MANHOLE INSPECTION
INs~eTOR J Be..
DATE ~1t9 /79
~:NO,
DEFECTS
:.-
;i'
loiN. NO.
.....
"
DEFECTS
= uo ______ __ __
-
JOB NO.
INSPECTOR
".
~
LOCATIO N
DLAMETER LENSTH
INCHES FEET
~A (;6
..
K= o.DulL
C=O~OOO'882dL < ".
"
N-I / 7i) /Y/-J Z
"?J-fc:n
so
TQ.:r&' I!
TOTAL C
TOTAl. K: . C=
: TIIoIE REQUIRED BY SPECIFICATION:
TEST
RESUL TS:
PS18 :4)J.,p3
SEC.
ED
PRESSURE LOSS ~ Lh
REMARKS Ji!l?<<
. - ~~\.~ r,-,
TEST REV.lEWED BY ~
TIME'
Z-V/79
,
DATE
........
/'
/"
...
100 f'T.
NOMOGRAPH
TO 1000H
L
~ 1000
C
15.0 --0
900
,
800
10.0
9.0
8.0
7.0
6.0
5.0
700
.
600
500
4.0
3.0
400 ~
'"
'"
LL
2.0 -::;
z
300 -
=-
:t
~
'"
250 z
'"
.J
200
1.0
0.9
0.8
0.7
0.6 ;;;
~
0.5 ~
0.4 ::
150
0.3
0.2
100
"
"
15000
10000
5000
4000
3000
2000
1000 --=
K
tq
1105
1020
935
900
850
800
765
700
680
:=
5'00
400
340 -= -
300J
283.3 _
200
226.7
100
50,
40
30
20
595
510
425
400
200 ....:
170 6
150
113.3 -'- 4
d
L
100
39
36
33
30
27
24
21
18 ~
:t
U
~
- 50
,
15
z
a:
'"
~
12 '"
~
..
o
10
",.
a.
a..
1-8
"
90
80
70
40
30
25
20
15
10
10 FT.
NOMOGRAPH
100FT.
c
1.5 _
1.0 ;;,
0.9 a
0.8
0.7
0.6
0.5
0.4
~
'"
'"
LL
~
:t
~
'"
z
'"
..J
-
-:.
0.1 ~
0.09 ~
0.08 ~
0.07 -3
=>
0.06 i
0.05 'l
0.04 -=
]
0.03~
-='
0.02 .::;
TO
K
1500
1000
500
400
300
200
-::
30
20
10
....:
5
4
. .;~
3
-::
2
=3
39
36
- 33
- 30
- 27
- 24
- 21
18 en
'"
:t
U
Z
_ 15
a:
'"
- 12 t;:;
~
..
o
~
- 6
- 4
7
d
10
.
~
'"
a.
a.
.
.- -.-.-
CITY OF EUGENE
DEPT. OF PUBLIC WORKS
SEWER AIR TEST REPORT
t\t1 E"c..c!oC() lo..YlL
A-Ib"
OFFICE FILE:
RECOMMENDED PROCEDURE ,OR CONDUCnNG AIR TEST
1.
Plug all pipe outlets with suitable test plugs. Brace each plug
securely. .'
If the pipe to' be tested is submerged in ground water, the eleva-
tion of the ground water above the top of the pipe must be .
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of at least
one manhole in each section to be tested wiLn rt :ransparent tube
attached to the nipple in such a r.~nner that the ground water
elevation may be determined by visual inspection.
For each foot, or fraction thereof, of ground water above the
top of the low end of the pipe included in the test section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite.
Add air slowly to the portion of the portion of the pipe install-
ation under test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
Check exposed pipe and plugs for abnormal leakage by coating with
~ soap solution. If any failures are observed, bleed off air and
make n~~essary repairs.
,Uter an internal pressure of 4.0 PSIG or more is obtained, allow
at least two minutes fpr air temperature to stabilize, adding only
the amount of air requIred to maintain pressure.
After the two minute period, disconnect air supply.
When pressure decreases to 3.5 PSIG, or more, as determined by
ground water elevstions, determine the time in seconds that is
required for a drop of 1.0 PSIG. This time interval should then
be' compared with the time required by specification as computed
below. '.
List the size and length of a~l portions of pipe included in the
test on the table opposite. .
By use of the nomograph, compute K and C. Use scales d and L, read
K and C, and enter these values in the table.
Add all values of K and all values of C for pipe under test.
If the total of all C values is less than one, enter the total of
all K values into the space for "Time Required by Sf4lClfication."
If the total of all,C values is greater than one, divide the total
of all K values, by the total of all C values, to get tq. To make
this division with the nomograph, ,use scales C snd K, and read tq.
13. On lines that are tested by air. manholes wi 1.1 be inspected for
infiltration at a time when ground water is at maximum heights:
Observations made at the time of such inspections are to be
entered in the proper spaces below. Such inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
2.
.'
MANHOLE INSPECTION
DLB
OATE
/ ') ;::C:-13 79
INslltc TOR
IoIH.Nn
DEFECTS
f
,;
ilK. Nn
DEFECTS
. :'
.
>,
, JOB NO.
INSPECTOR
I DLAMETERI LENGTH
INCHES FEET
18" 1,%
I I
I I
I I
. I:
. ,
,;
"
..l2.ATE'
PH' 2- 7() fir" -I- :z,
r'H'~" ....:.
lCoO.OIlen. IcoO;OOO'88~d~'
,"/ /97s-1 '
I
I'
I
~
LOCATION
TOTAL
K'
.Co
TPIM....l!
TOTAL C
, TIlliE REQUIRED BY SPECIFICATION:
TE'ST
_PRESSURE IJl.U ~
REIIIARKS ~.
~~(-
TEST REVIEWED BY ~
, WULTS:
PSI9 o4ks
75
TillE-
SEC~
DATE
'2. - '%.i-79
y
L
~ 1000
900
800
700
=
600
500
4000-
W
W
...
z
300 -
:I:
0-
...
- 250 z
'"
...l
200
150
100
NOMOGRAPH
100 n:
c
15.01
10.0 ,;;;
9.0 ~,
B.O ~
1.0 ::
:'~l
4.01
3,0 :.
-
2.0 ~
.::j
~
1.0~
0.9 iI
O.B ,]
0.7 _
0.6]
0.5 ~
0.4 ::
03]
,,1
TO 1000 .1.
K
tq
1105
1020
935
900
B50
BOO
765
700
6BO
15000
10000
5000
4000
3000
-
2000 :.
=
-
1000 -=
~OO
400
3DO
200
300 -:
2B3.3 _
226.1
100-=:'.
.
50
40
30
20
595
510
425
400
340 -.
200"":
110 6
150
113.3 ---'- 4
d
39
36
33
- 30
21
24
21
18 ~
:I:
<.>
~
15
z
a:
w
0-
12 w
::;
..
o
10
w
Q.
Q.
8
'!1
I
I
.1::
L
100
90
80
70
60
- 50
-
40
0-
W
W
...
30
~
25
:I:
0-
e>
z
'"
...J
20
15
10
IOn.
NOMOGRAPH
TO
100'....
c
1.5 -= '500
1.0 ,;;
0.9 ;;
O.B ::
""
0.7
03
0,2-l
-3
1
0.1 -
0.09 ~
O.OB ~
0,07 ::
0.06 -j
0.05 --.!
-:;
0.04~
.3
:::;
003 -=
. :3
-3
~
-i
0.02~
=3
K
1000
39
36
- 33
- 30
- 21
500
400
300
- 21
- 24
200
- IB Vl
w
:I:
<.>
z
_ 15
50
40
a:
w
- 12 ~
::;
..
o
30 _
20 -
::'i
10
-'
-::
5
4
3
2 ~
d
.
~
10
W
Q.
Q.
.
- 8
- 6
- 4
.
'. J.
..
\-'
~
.':
4.
5.
,
6.
7.
.
8.
9.
10.
11.
12.
,
,
,
A'-Ib
CITY ...~
-.....ell.......
DEPT, OF PUBLIC ."....-:-0
SEWER AIR TEST REPORT
RECOMMENDED PROCEDURE FOR CO~'DUcnNG AIR TEST
1. Plug all pipe outlets with suitable test plugs. Brace each plug
3ecurely. .
2. If the pipe to be tested is submerged in ground water, the eleva-
tion of the ground water above the top of the pipe.must be
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of at least
one manhole in each s~ction to be t~sted with n :ransparent tube
attached to the nipple in such a manner that ~h~ ground water
elevation may be determined l:y. visual inspection.
Fa, each foot, or fraction thereof, of ground water above the
tOp of che low end of the pipe included in the test section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite.
Add air slowly to the portion of the portion of the pipe install-
ation under test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
Check exposed pipe and plugs for abnormal leakage by coating with
e soap solution. If any failures are observed, bleed off air and
make necessary repairs.
After an internal pressure of 4.0 PSIC or more is obtained, allow
at least two minutes fpr air temperature to stabilize, adding only
the amount of air requIred to maintain pressure. '
After the two minute period, disconnect air supply.
When pressure decreases to 3.5 PSIG, or more, as determined by
ground water elevations, determine the time in seconds that is
required for a drop of 1.0 PSIG. This time interval should then
be' compared with the time required by specification as coa,gted
below.
List the size and length of aU portions of pipe included in the
test on the table opposite. .
By use of the nomograph, compute K and C. Use scales d and L, read
K and C, and enter these values in the table.
Add all values of K and all values of C for pipe under test.
If the total of all C values is less than one, enter the total of
all K values into the space for "Time Required by S,.c:ification."
If the total of all C values is greater than one, divide the total
of all K values, by the total of all C values, to get tq. To make
this division with the nomograph, use scales C and K, and read' tq.
OFFIC:f FII ~:
13. Gn lines chat are tested by air, manhole. will be inspected for
infiltration at a time when ground water is at maximum heights.
Observations made at the time of such inspections are to be
entered in the proper spaces below. Such inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
INSlltCTOR
t::,
MANHOLE INSPECTION
IoIH.Nn
I
I ilK. Nn
__ ---==:II
JOB NO.
LOCATIO N
w ~ Tt".,4fl 4
T(l.IAl "
TOTAL C
TFST
DEFECTS
DEFECTS
INSPECTOR
I DLAMETEIII
INCHES
8" I ~2.:
I
I
I
LENGTH
FEET
I
I
I.
I
TOTAL
~~~.v/a ~/C
O.t.TE
I /' I ~}i'-
,
DATE - t
/C=O.OOO'882dL .r
I
I Ii
I
I
K: _q{) S~ e, _
K= O.OIlen.
9()>
, TIME REQUIRED BY SPECIFICATION:
RESYJ. TS:
4/1.1. <?;<>. /.
PSI9: Tt1.~IME: ._
PRESSURE I oss IIALfl,
a
....... . ~~
TEST REVIEWED BY .
~o
SEC.
DATE
2.- 7..1-7'
~~
" -,.. --. ~
, , ....,_..'~... _....-
--
NOMOGRAPH I, N 0 MO G R A PH
100 n: TO 1000 Ft 10,.. TO lOOn:.
L C K tq d L C K d
~ 1000 100 ..'''.1.,
15.0 --:: 150001 1105 39 1.5 --3 =- 39
- 1500
- -='
900 ...:: 1020 36 90 ...:: - 36
-
10.0 .,;; 10000 -: 935 33 - 1000 ~ - 33
800 900 BO 1.0 -=
- 9.0 ~, - 0.9 j
- B50 30 - 30
- 700 B.O ~ BOO - 70 O,B .
, 7.0 :: - 765 27 ~ 27
- - 0.7 -
6.0 -:i 5000 - 500 -
-
0 600 4000 700 - 60 0.6 400 1
680-= 24 ,- 24'
- 5.0 ! 3000 - - 0,5 300
-
- 595 21 - 21
- 4.0 ~ - 0.4
- 500 - 50 -
2000 - 200 -
- ::.
i: 3.0 = 510 18 ~ I - 03 ....3 IB '"
'"
::I: I - .::::; ::I:
-
~ 400 >- ~ U - 40 ......, '-'
~ I z
'" 1 000 -= 425 15 i ::i 100 15
- '" 2.0 ::; - >- 0.21 -
... 400 z '- '" ~
'"
~ - ...
0:: - 0::
'" ~
Z . i '"
~ >- ,I - ~
300 - 500 340 - 30 50 >-
12 '" - 12
- - '"
'" 400- ::E '" ...0 40
::I: ...:: <l :I: - ::E
>- =- >- ..
Cl 1.0 ..:. 300 - 300 0 - Cl -
. 250 z 10 - 25 Z 0.1 ~ 30 0 .
- 2B3.3 - 10
'" 0.91 'I - '" 0,09
...J '" I ...J '"
- O,B Q. I - 0.08 ;: !!o
. 200 . 20
0.7 ..:: Q. 0.07 -a Q.
200 -3 ~~ 8 20 0.06 =1 - - 8
0.6 -
= 1
~ 100"":; 200 ~
0.5~ 0.05 --a 10
-= ...::
=l 3 -
0.04 == -
-
ISO l 170 6 15 - - 6
50 003 ::::! 5
. -"'3
40 ~ 150 ~ 4
-:::i
-' ::~ -'
~ --i 3
0.2 -=1 0.02~
! 10 ~ 2
100 113.3 ---'- 4 - 4
'JiiU"l'j::.
.
3.
4.
5.
6.
7.
.
8.
9.
10.
11.
12.
CITY OF EUGENE
DEPT. OF PUBLIC
SEWER AIR TEST
A'-Ib
RECOMMENDED PROCEDURE FOR CONDUCTING AIR TEST
1. Plug all pipe outlets with suitable test plugs. Brace each plug
securely., ',.
2. If the pipe'co be tested is submerged in ground water, the eleva-
tion of the ground water above the top of the pipe must be
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of ai least
one manhole in each section to be t~sted ~ith a ~ransparent cube
attached to the nipple in such a manner that the ground water
elevation may be determined by visual inspection.
For each foot, or fraction thereof, of ground water above the
cop of the low end of the pipe' included in the test section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite.
Add air slowly to the portion of the portion of the pipe install-
ation under test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
Check exposed pipe and plugs for abnormal leakage by coating with
a soap solution. If any failures are observed, bleed off air and
make necessary repairs.
Aft~r an internal pressure of 4.0 PSIG or more is obtained, allow
at least two minutes for air' temperature to stabilize. adding only
the amount of air requ~red to maintain pressure.
After tne two minute period, disconnect air supply. .
When pressure decreases to 3.5 PSIG, or more, as determined by
ground water elevations, determine the time in seconds that is
re9uired for a drop of 1.0 PSIG. This time interval should then
be compared with the time required by specification as computed
below.
List tne size and length of aU portions of pipe included in the
test on the table opposite.
By use of the nomograph, compute K and ,C. Use scales d and L, read
K and C, and enter these values in the table.
Add all values of K and all values of C, for pipe under test.
If the total of all C values is less than one, enter the total of
all K values into the space for "Time Required by Sf4ICification."
If the total ,of all C values" is greater than one, divide the total
.of all K values, by the total of all ,C values, to get tq. To make
this division with the nomograph, use scales C and K, and read tq.
WORKS
REPORT
OFFICE FILE:
13. On lines that are tested by air, manholes will be inspected for
infiltration at a time when ground water is at maximum heights.
Observations made at the time of such inspections are to be
entered in the proper spaces below. Such inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
Ht,adcUo/ ;a,.../c
MANHOLE INSPECTION
INSIltCTOR
i t..":> ~,-
-",I __ ,C. _ _
MI. NO,
IIH.Nn
....LgjINO.
LOCATION
/)}-( t---: "-;"0 l'.l" (:.,
TQIM, K
TOTAL C
......, /
,
> '._ r
. .
OATE
MFECTS
~ECTS
4
/'.1
.INSPECTOR
TES.. T ,
PRESSURE ~~,~
lliMARKS ~<
~~~ .
TEST REVIEWED BY ~
..QAU ,
DLAMETER LENGTH
INCHES FEET'
IC= O:OIlen.
C=O.0003882dl!
"
" ,
I :;'7.
/Z/)
TOTAL
K' /ta Sl:c.... c=
- - TIlliE REQUIRED BY SPECIFICATION:
RE,SUL TS:
,,"fC. '
PSI9=4J.O 3LFhwE'
:L Jnk".. C SEC.
DATE ? -7'-" 7~
100 n:
NOMOGRAPH
TO 1000'T.
L
c
~ 1000
15.0 :-::
900
800
10.0
9.0
B.O
7.0
6.0
5.0
700
600
500
4.0
;;::
3.0
400...
'"
'"
...
2.0
z
300 -
::-
:r
...
C>
250 z
'"
...J
1.0
0.9
O.B 3
0.7 ]I
0.6 =
~;l
031
0.21
-'3
200
--.:--j'5Q
100
15000
10000
5000
4000
3000
2000
-
1000 --=
I(
'500
400
200
tq
d
L
100
595 21
- 50
.
510
::-
...:
'"
Q.
Q.
:-
:-
226.7 T 8
200~
100---,
50 _
40
30
20
170 6
150
113.3 -' - 4
10FT.
NOMOGRAPH
100FT.
90
BO
70
GO
40
...
'"
'"
...
30
~
1105 ,39
1020 36
935 33
900
B50
BOO
765 27
700
680 24
18 ~
:r
u
~
:~~i- 15 z
340 -i- 12 ~
<t
300 --: 0
283.3 10
25
:r
...
C>
Z
'"
...J
20
15
10
c
1.5 --'"
1.0 -=
0.9
O,B
0.7
0.6
0.5
0.4
0.3
0.2 ~
0,1 ~
0.09 ~
O.OB ~
'"
0.07 ~
0.06 ~
..
0.05 -=!
0.04 ::;
:=l
:=;
:::I
0.03 -:::
....;
:::::l
---l
0.02 ~
TO
1500
1000
300
200
~
-::
-::.
I(
500
400
100
50
40
30
20
10
5
4
3
2
39
36
- 33
-30
- 27
- 24
- 21
a:
'"
- 12 ...
'"
::IE
<t
o
- 8..
- 6
'.
- 4
d
IB en
'"
:r
u
z
15
~
10
'"
Q.
Q.
1
.,
-.:;'::
.
.
.'t~
,
-
CITY OF EUGENE
DEPT. OF PUBLIC WORKS
SEWER AIR TEST REPORT
A-Ib
RECOMMENDED PROCEDURE FOR CO~~UCTING AIR TEST
.
1. Plug all pip:e.,outlecs with suitable test plugs. Brace each plug
securely.
2. If the pipe to be tested is submerged in ground water, the eleva-
tion of the ground water above the top of the pipe must be
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of at least
one manhole in each section to be tested wit:h a cTansparent cube
attacheo to the ~nipple in such a manner that the ground water
elevation may be determined by visual inspection.
For each foot, or fraccion chereof, of ground water above che
cop of the low end of the pipe included in the test, section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite.
Add air slowly to the portion of the portion of the pipe install-
ation under.test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
Check exposed pipe and plugs for abnormal leakage by coating with
a soap solution. If any failures are observed, bleed off air and
make necessary repairs.
After an internal pressure of 4.0 PSIG or more is obtained, allow
at least two minutes fpr air temperature to stabilize, adding only
the amount of air requIred to maintain pressure.
After the two minuce period, disconnect air supply.
When pressure decreases to 3.5 PSIG, or more, as determined by
ground water elevations, determine the time in seconds that is
re~uired for a drop of 1.0 PSIG. This time interval should then
be compared with the time required by specification as cODpUted
below.
List the size and length of aU portions of pipe inc.luded' in the
test on the table opposite. '
By use of the nomograph, compute K and C. Use scales d and L, read
K and C,~ and enter these values in the table.
Add all values of K and all values of C for pipe under test.
If the totsl of all C values is less than one, enter the total of
all K values into the space for "Time Required by s,.cification."
If the total of all C values is greater than one, divide the total
of all K values, by the total of all C values, to get tq. To make
this division with the nomograph, use scales C and K, and read tq.
) .
i
OFFICE FILE:
13. On lines that are tested by air, manholes wil i. be inspected for
infiltracion at a time when ground water is at maximum heights.
Observations made at the cime of such inspeccions are to be
entered in the proper spaces below. Suc.h inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
,MeadoM/~ ,./C
MANHOLE INSPECTION
,ltIlSlltCTOR
"
:,
DfoTE
.-t. NO.
DEFECTS
I ilK. NO.
DEFECTS
.- ...=--
JOB NO.
INSPECTOR
MTE
LOCATION
DLAMETER
INCHES
LEN6TH
FEET
IC= 0.01len.
C=O.000'S82dL
/1,13 '1/' /,e, "
..... "
,.;;~! ~. "j- :' :
.".
'~
TOTAL
K' ~
.Co
T{ll'~\ "
TOTAL C
TIlliE REQUIRED BY SPECIFICATION:
TEST RE:$LJL TS:
_PRESSURE ~ Wth PSI9~ E'1. TlIIE'~~.:IcJ SE<;;
,REIIARI(S Q~
,"~~~
TEST RE\lIEWEDBY~ DATE ?_-U-7?
t7
. .~'.
.... 1"-
.
r
NOMOGRAPH I NOMOG R A PH
100 n: TO 1000 Ft I 10FT, TO lOOn:.
II
L C K tq d I L C K d
.~ 1000 15.0-: 1105 39 100 1.5~ 39
- 15000 ==1 1500
-
900 - 1020 36 90 36
- -'1
-
- 1000
OOOl 10000 935 33 80 - 33
BOO 900 I.Oi
9.0 - 0.9
B50 30 - 30
B.O BOO - 70 O,B -='I .
- 700 0.71
- 7.0 765 27 - - 27
- 5000 500
- 6.0 700 - 0.6
= 600 4000 :: GO 400
680 24 - 24
- 5.0 3000 - 0.5 300
-
- 595
- 21 - 21
- 0.4
500 4.0 - 50
~ 2000 200
:: 510
3.0 18 ::3 0.3 IB (I)
'"
:I: - ~ :I:
- 400.... 0 40 0
'" 1000 -= ~ ~ 100 z
425 15 -! - 15
'" - z .... 0.2~,
2.0 - 400 - '" ;;
- ...
- '"
a: ... -=
- :- -3 a:
z - '" '"
- 300 - 340 .... . 30 ;; :3 50 12 ....
- 12 '" - - '"
..-:-- - - ~ :- -i 40
- :I: ..: .. :I: ~
- =- .... ~ ..
- - 300 0 . '"
.'" 1.0 ,;; - 0.1 30 0 .
250 z 10 - 25 z -S
2B3.3 - '" 0.09 = 10
'" '" - ...J =a '"
..J ~ -
0. - ~
:: O,B ~ O.OB 20 !';
- n- o.
0.7 -=1 0.07
200 0.6~ 226. 8 20 S
OD6 -jJ - 8
-"'I s
0.5 100 200 0.05~ 10 ....'
0.4 0.04 ~
- 6 ""
150 170 15 :3 - 6
0.3 50 0.03 -= 5
150 ~ 4
40 i
0,21 30 3'
0.02 -=:J
20 10 ~ 2
100 113.3 -'_ 4 - 4
(fJ
,.
< ~
CITY OF EUGENE
DEPT. OF PUBLIC WORKS
SEWER AIR TEST REPORT
.
A-Ib
RECOMMENDED PROCEDURE FOR CONDUCTING AIR TEST.
Plug all pipe outlets with suitable test plugs. Brsce each plug
securely.
If the pipe to be tested is submerged in ground water, the eleva-
tion of the ground wster above the top of the pipe must be
determined in a manner satisfactory to the Engineer. An acceptable
method is the use of a pipe nipple through the wall of at least
one manhole in each section ,to be tested with a transparent tube
attached to the nipple in such a manner chat the ground water
elevation may be determined by visual inspection.
Por each foot, or fraction thereof, of ground water above the
top of the low end of the pipe included in the test section; add
0.433 PSIG to the pressure for the test on such section. Show all
computations in the space opposite.
Add air slowly to the portion of the portion of the pipe install-
ation under test until the internal air pressure is raised to a
minimum of 4.0 PSIG.
Check exposed pipe and plugs for abnormal leakage by coating with
a soap solution. If any failures are observed, bleed off air and
make necessary repairs.
"After an internal pressure of 4.0 PSIG or more is obtained, allow
at least two minutes for air temperature to stabilize, adding only.
the amount of air requ~red to maintain pressure. ,
After the two minute period, disconnect air supply.
When pressure decreases to 3.5 PSIG, or more, as determined by
ground water elevations, determine the time in seconds that is
re~uired for a drop of 1.0 PSIG. This time interval should then
be compared with the time required by specification as computed
'below.
8. List the size and length of a~l portions of pipe included in the
test on the table opposite.
9. By use of the nomograph, compute K and C. Use scales d and L, read
K and C, and enter these values in the table.
10. Add all values of K and all ,values of C faT pipe under test.
11. If the total of all C values is'less than one, enter the total of
all K values into the space for "Time Required by Sf4ICification."
12. If the total of all C values is greater than one, divide the total
of all K values, by the total of all C values, to get tq. To make
this division with the nomograph, use scales C and K, and read tq.
--'
OFFICE FILE:
13. On lines that are tested by air, manholes will be inspected for
infiltration at a time when ground water is at maximum heights.
Observations made at the time of such inspections are to be
entered in the proper spaces below. Such inspections shall be
made prior to the expiration of the contractor's one-year
guarantee period.
M~o...cbo~ lG-1""\.c:.
MANHOLE INSPECTION
INSIltCTOR
IMH.Nn
I
i -
./
'l
:7 J.,
!
-:.....?
QATE
DEFECTS
.M!" IIIIl
DEFECT"
JOB ND. '
INSPECTOR
'pATE
LOCATION
DLAMETERI LENGTH
INCHES FEET
,', ...,,,
_'...1 J(./
C= 0.000'882 dL
h':~ If
I'
I
I
7
"
"
IC = O.OIlen.
/50
, ;:'-.J
TOTAL
K= /S-o
c=
TP.:r~1 l'
TOTAL C
., TIME REQUIRED BY SPECIFICATION:
TF..s.T
PRESSURE ~A"o J-05S,
REMARKS /~<<;
-~~~C__
_.-,..... -.n~\II~Ulel"\ ov ~ - ~~ ~
RESJ,U TI'::
PSI9.A /.a3' TIME- ~~ ~() SEC,
_ nAT~ .., _.,,-,, ~"
- - 'I'
.:.. '. "
. " (.' ',f. .
,. "''''''1-''{ .:.
00
NOMOGRAPH N 0 M 0 G R A PH
100 n: TO 1000 'T. IOn TO 100FT.
L C K tq d L C K d
~IOOO 15.0-:: 39 100 ~
1105 1:5 39
- 15000 :::i 1500
900 - 1020 36 90 36
-
-
10000 935 33 - 1000 33
.~ 800 10.0 900 80 1.0 ..
- -
- 9.0 850 30 0.9 - 30 .
- B.O BOO - 70 O.B
700
- 7,0 5000 765 27 - 0.7 500 - 27
-
- 6.0 700 - 0.6
:::: 600 4000 :::: GO 400
680 24 - 24
- 5,0 3000 - 0.5 300
-
- 4.0 595 21 0,4 - 21
- 500 50
2000 - 200
- 3.0 510 18 : 0.3 - IB II>
, ~ UJ
- X , ~ x
~ 400 -:::i u ~ 40 u
... ~ , z
UJ 2:0 ~ 1000- 425 15 :::; 100 15
- UJ - ... ,0.21 -
z '-
, IL 400 UJ ~
UJ
- IL
l!: -
. - ~ a:
'" z - UJ . UJ
'" 300 - ';00 ... =- 30 ~ 50 ...
- 340 --; - 12 UJ - 12
, - . ~ UJ
:- ::l! =-
x .::: 400- <[ :z: ~ 40 l :If:
... - =- f- ..
, - 300 -= 0 . " ~ .
" 1.0 ~ - 0.1 30
250 z 10 - 25 ' z ~ 0
2B3,3 - 10
O.g-~ - UJ
'" , UJ 0.09 1
...J -: ...J :3 '"
- J' " I a. -
, 0.8 200" '1---. -: , O.OB '3 20 ~
CL -
0.7 0,07 j a.
~ -._~- :~
:ZE => aa - .~ 8 20
v.tJ~ OD6 _ - B
..SI ~
0.5 i 100 200 ..-: 0.051 10
-'
0.41 -
0.04~ -
150 170 6 15 :3 -
-,- :3 '.;-:. - 6
0,3 -< 50 0,03 -= 5
.3 150 =>
40 - 4
-i
30 =i 3
0.2 -= 0.02~
~ 20 =3 2
100 113.3 -=- 4 10 -:J - 4
....