HomeMy WebLinkAboutS-296203' PART TWO - MATERTAIS
2 -1 GENERAL
Ali materials and equipment shall be new and workmanship and materials
shall be good ouaiity. All material incorporated into the work shall
eonierm to the provisions of this park Al! references to Specifications shall
be of the lato;t edition.
2 -2 MATERIAL LTSYS AND SPECIFICATIONS
The Developer or his Contractor shall deliver to the Engineer a material list
not le>s :ban fen (30) days before commencement of construction. The list
shall contain the manufacturer and model number, if applicable, of Ore
material and equipment to be installed as a part of the work so that the
Lbgineer may determine whether such materials conform io the Plans and
Specifications. No materials that are not sduded in the material list shall be
installed as a part of the rank. The manufacturers technical specifications
for pipe, appurtenances and equipment to be scorporated into the work shall
he submitted iu the Lhgineer ai least ten (10) days prior to commencement
of constnrction with the materials Nsted.
2 -3 GUARANTEE BY 11iANUFACTURER
D requested by the District or by the 8ngineer, a written guarantee made by
the manufacturer of any materials to be incorporated into the work shall be
' fu- shay', guaranteeing to the District chat such materials shall conform to
these Specifications and anq specifications otherwkse applying to the work.
2 -4 SEWER PIPE AND APPURTENANCES, NON - PRESSURE
Non - pressure sewer pipe shaD be PVC pipe conforming to AS1Td D -3034 for
deaths of cover between 5 feet 10 !2 feet; and Ductile Iron pipe, doss 50,
cement lines conforming to AWWA Standard C -151 and C -104 for depths pf
cover less than 5 feet or exceeding 12 feet and for slopes less than 1% and
and over 15 %. All pipe joints shall berubber- gasketed.
PVC serer pipe is dapped as ne8ble conduit Joints shall conform to ASTM
D-32f2 using a restrained rubber gasket conforming m ASTM F-477.
l5ttings shall be sjection molded tees or iaetorg solvent welded saddle tees.
Saddle fastened to pipe with external bands are not acceptable on any new
system.
- Ductile L^on pipe is defined as rigid conduit Mechanical or push -on joints
shaD conform to AWWA Standard C -110.
2 -5 SSWII2 PIPE AND APPURTENANCES - PRESSURE
Unlea otherwise sperfied, pressure pipe shall be constructed of:
(a) Ductile iron pipe conforming m AWWA. C -151 wiWl a manufacturer s
the cement lining conforming to AWWA C -104 (except as to thickness)
and with the type of jolt, class, thickness, designation and msrl:ags
as specified
(b) Cast Iran fittings shall be rubber - gasket and shall conform to AWWA
C -110 sad C -111. Valves shag conform to AWWA Specifications
IC -500.
2 —O MAl \IIGLGJ — �°' ,�1. TAl�LA1�D
(a) Manhole Frames and Covers
Cast iron troves and covers shaD ccnform to the Ol,�mpic Foundry
Company No. MII30A, or equivalent Castings shall conform to the
requirements ai ASTM A48, clasp 30 and shag be free of porosity.
shrink cavities, cold shuts, or cracks or any surface defec#s which
would impair service ability. Repair of defects by welding, or by the
use of 'smooth -on' or similar material wBt not be permitted Cover
to be non -skid typo surface and shall have the word °SEWER° s Large
raised letters.
A bituminous coating shall be applied to aB surfaces. The finished
coating shall be continuous, smooth, neither brittle when cold nor
sticky when exposed to the sun, and shall be strongly adherent to the
casting. The District shall have the right to require inspection and
approval of all castings prior to painting. Manhole rings and covers
shall be machine finished or ground on seating surfaces to assure
non - racking fit s any position, and sterchangeabiktp. At the request
of the Disi.rici, there shall be made available ai the foundry standard
rings and standard covers for use by inspectors s testing fit and
seating.
Manholes located outside public rights -of -my shall be equipped with
a locking device of such design that the cover may be readily
released from the ring. All movable parts shall be made of
non- corrosve metals otherwise arranged to avoid possible bsding.
At the request of the District, there shall be made available at the
foandrg a testing device suitable for provsg the capacity of the
of the assembly to resist an uplift pressure on the lid equal to a 20 -foot
head. The locking frame and cover shall be Metro standard frame
and cover with 3- screw -type locking Bds.
All manhole {tames and ecvers shall be identified by the name or
symbol of the manufacturer. Tuts identification shall be s a plainly
visible location when the frames and covers are installed s addition
to the manufacturer's identificaton, the material shall be identified by
the following "NOD° or °DUC° for nodular or ductile iron respectively.
The manufacturer's identification and the material identification shall
be adjacent to each other and shaD be minimum 1 /2 -scu letters,
recessed to be flush with the adjacent surfaces.
(b) Precast Manhole Components
Precast manhole componens shall conform iu ASTM C -470 except
as modified herein. Base section openings to receive pipe shall be
circular, tapered inward, and held to the minimum size practical to
accomodate the pipe to be inserted to effectively seal the joint.
�, Pipe to manhole connections shall be made with a rubber boot installed
-" s a pre -cored opening.
a
I'
a
Precast manhole elements shall be provided with steps and /or ladders
such that the completed manhole will contain a continuous vertical
ladder wkW1 rungs equally spaced at 12 inches apart plus or minus 3/4
inch. The lowest rung shall be not more than I6 inches above the
shelf, and the uppermost rung shell be not more than 18 inches below
the street surface.
Jofnts batmen precast manhole elements shall be rubber gasketed
similarly to pipe joints and shell conform to ASTM C -433. Shnp
drawings of the joint design shall be submitted to the Engineer for
approval, prior to manufacturo. Completed ioknts shall show no
visible leakage and shall conform to the dimensional roqufrements of
ASTM C -478.
Standard flat slab covers for shallow manholes shall be a minfmum
of 8 inches thick and shall conform to the outer dimension of the
standard sections upon rehfch they are to be placed. The 24 -inch
diameter opening shall be eccentrkeally located as shown on the
Standard Plans to provide al least 6 inches mfnfmum radial distance
Iron the edge of the 24 -inch opening to the fnside face of the
standard sectimr belox. Reinforcing shall be as shown on the
Standard Plans. Reduction to 24 fnehes shag be made by means of
of a flat slab, for shallow manholes, or an eccentric precast cone for
standard manholes.
(c) Deformed Bar Steps
Galvanized deformed bar steps shall be 1- inch - diameter deformed bar
conforming to ASTM A -615, Grade 40 or Grade 60, hot bent and
galvanized after bending. For Bending, the temperature shall be at
least 1,600 degrees F. Galvanizing shall conform to ASTM A -123.
Step dimensions and pattern shall conform to the Standard Plans.
Pol}Prapylene coated steps shall conform to ASTM C -478 with deformed
bar conforming to ASTM A -615. Steps shall be Lane model P -14938
or approved equal.
(d) Ladders
Precast manhole base sections more than three feet in height shall be
provided wish a ladder as detailed on the Standard Plans. Ladders
shall be galvanized steel or polypropylene coated.
2 -7 IMPORTED BACKFILL MATERIAL
Imported beckfill material shall be free from wood, bark, roots or other
extraneous material and shall meet the following requirements:
U.S. Standard % Passing
Sieve Size Wei ht
2 -1f2" Square Opening 100
1/4' Sieve 25 Min.
No. 200 10 Max.
Sand Equivalent 35 Min.
PEA GRAVEL WILL NOT BE ALLOWED AS BACKFILL MATERW.
2 -B TRENCH FOUNDATION MATERIAL
Unsuitable foundation material shall be averexeavated and replaced rift
bedd'mg material
Over - excavated material shall be replaced with trench foundation material
conforming to one of the following gradations as specified:
U.S. Standard Class "A°
Class °B"
Sieve Size Min. Max.
tRn. Max.
2 -1/2" square opening 98% 100% 95% 100%
2' squaze opening 92 100 75 100
1 -1/2" square opening 72 87
30 60
1 -1/4" square opening 58 75
3/4° square opening 27 47
0 15
0 1
3 /B" square opening 3 14
0 0
No. 4 sieve 0 1
0 0
2 -9 BEDDING MATERIAL
All xpa, tees and mmds d std` sewer stabs shaD be pbrgg� xnh flerible
Bedding material shall be well- graded, clean, granular material, commonly
know as pee gravel or sand and shall meet the following requirements:
U.S. Standard
%Passing
- Sieve Size
By Weight
Pea Gravel:
flen"61e- jointed lateral connerton or eafensian. No donbie plugs shaIl be
3/8° square opening
100
jf8 sieve
0 -5
Sand:
instaIled shaIl fie tested xith low pressure aft. Air shaIl fie slowly supplied
3/0' square opening
!00
1/4" square opening
90 -100
q10 sieve
40 -75
jj40 sieve
15 -40
$2D0 Sieve
0 -15
2 -10 ASPHALTIC CONCRETE
The pipe shaIl be acceptable if the time required in seconds for the pressure
Asphalt concrete pavement shall conform to the technical
requirements for
Class B Asphalt in the latest edition of the State of
Washington Standard
Specifications for Road, Bridge and Municipal Construction.
2 -11 TOP COURSE AND EEYSTONE MATERIAL
For use in the restoration of excavated areas, Top Course and Keystone
material shall be manufactured from lenge or talus rock, be free from wood,
roots, hark and other extraneous material and shall
conform to the following
requirements:
may contain grease, scluasg but not limited to, scullery sinks, pot and pan
U.S. Standard
7, Passing
Sieve Size
By Weight
5/8" square opening
100
1/4° square opening
55 -75
U.S. No. 40 sieve
8 -24
U.S. No. 200 sieve
10 Max.
Sand Equivalent
40 Min
2 -12 BASE COURSE MATERTAL
Base course material shall conform to the following requirements:
U.S. Standard %Passing
Sieve Size B ei ht
1 -1�2" square opening 100
5/8 square opening 50 -80
1/4" square opening 30 -50
U.S. No. 40 sieve 3 -18
U.S. No. 200 sieve 7.5 Max.
Send Equivalent 40 Nin.
2 -13 CONCRETE BEDDING AND BLOCEING
Bedding and blocking concrete shall be Portland cement concrete containing
four sacks of cement per cubic yard end maximum aggregate size o[ 1 -I/2
inches. Maximum slump shall be 3 -I/2 inches.
PART THREE - CONSTRUCTION.
3 -1 GENERAL
Except as otherwise noted hares, all work shall be accomplished as recommended
in the latest revision of AWNA and APWA Specifications and according to the
recommendations of the manufacturer of the material and equipment concerned.
All specified depths shall be compacted depths.
In roadmy areas, all asphalt and concrete pavement shell be saw cut. When
trenching operations cut through concrete pavement, the pavement shall be
removed to a width of 18 inches greeter than the top reidth of the trench. The
concrete shall be saw cut on a straight line and shall be beveled so that the cut
will be approximately 1 inch wider at the top than at the bottom. Asphalt paving
shall be saw cut ahead of the beckhoe to prevent excessive tearing up of the
surfacing and. to eliminate ragged edges.
3 -2 TRENCH EXCAVATION
Trenches shall be excavated to the line and grade designated by the District.
Unless otherwise specified, trench sides shall be excavated vertically. Trench
widths shall be adequate for proper working space and placement of bedding
material under and around the pipe. The trench width, from the bottom of the
trench to 4" above the crown of the pipe, shall not exceed 40 aches for 15 -,
inch diameter and smaller pipe, or 1.5 times the inside diameter of 18 -inch
or larger pipe, plus 18 inches. If these widths are exceeded, a stronger grade
of pipe and /or a higher classificatiop and amount of beddng material shall be
furnished, as directed by the District.
Excavation for manholes or other structures shall be sufficient to provide a
minimum of 18 inches between l6e structure and the sides of the excavation,
enough to allow for proper compaction of the surrounding backfffi.
All material excavated from trenches and piled next to the trench, shall be
placed and maintained so that the top of the material is at least 2 feet how
the edge of the trench. Excavated material shall be located so that tree access
is provided to all fire hydrants, water valves, meters and other utilities, and
clearance shall be left to enable free flow of storm water s all gutters,
conduits and natural inter courses.
3 -3 TIMBERING AND SHEETING
The developer shall provide and install timbering and sheetag as necessary
to protect workers, the work, existing buildings, utilities and other properties,
and shall meet all OSHA and W[SHA requirements.
3 -4 JACKED OR BORED CROSSING
All work shall be done s conformance with the requirements of the agency
in control of the facility being bored or jacked. See Roadway and Railway
Crossings for further details.
S -5 ROADWAY AND RAILWAY CROSSINGS
Any method may be used for roadway or raUway crossings that provides for
satisfactory results and is acceptable to both the District and the governmental
or private agency Laving control of the road or track, provided that the road
or track shall be res ±need to its original condition after the crossing is
completed. if tunneling or jacking is elected or required for crossings, steel,
cast iron or concrete pipe casing shall be placed and the sewer pipe laid
within the casing. For District Standards far boring or tunneling see °Water
or Sewer Casing Detail" on separate sheet.
3 -8 TRENCH FOUNDATION
if, in the judgement of the District, the native trench bottoms will provide a
firm base for the subsequent placement of bedding, pipe and backfiN, such
native trench bottom may be used if the bottom is leveled and smoothed so
that the entire length of pipe will rest on swell- compacted base. Trench
bottoms shall be over - excavated as necessary to remove all unstable soil and
eliminate "boiling' or "quick" conditions to such a depth as to provide a firm
base. Over - excavated materials shall be replaced with trench foundation
material as specified in Section 2 -8. Foundation material shall be placed
when ordered by the District.
3 -7 BEDDING MATERIAL PLACEMENT
All flexible pi a shall be placed in bedding material of the type specified s
Section 2 -9 �a). The bedding shall be placed from a minimum of 4 inches
below the pipe barren to 4 inches above the pipe as shown on the
Standard Detail herein. Bedding material shall be worked by hand under, around
and over the pipe to rue depths required for the full width of rue trench.
AH rigid pipe shall be placed in bedding material of the type specified s
Section 2 -9 (a) or (b). The bedding shall be placed r-nm a minimum of 4
inches below the pipe barrel to the spring line of the pipe as shown on the
Standard Detail. Bedding shall be placed in more than one lift. The first lift,
Lo provide at least 4 -inch thickness under any portion of the pipe, shall be
placed before the pipe is installed and shall be spread smoothly so teat the
pipe is uniformly supported along the barrel. Subsequent lifts of not more
than 6 -inch thickness shall be placed as shown on the Standard Detail and
individually compacted to a minimum of 90 percent of maximum density.
Shoring to be removed, or moveable trench shields or boxes, shall be located
el least 2 -1/2 pipe diameters away from flexible pipe if the bottom of the
shoring, shield or box extends below the top of the pipe, unless a satisfactory
means of reconsolidating the bedding or side support material disturbed by
shoring removal can be demonstrated.
In solid rock excavation, aD ledge rock, boulders or stones shall be removed
to provide a minimum clearance of 8 sches under the pipe. Ali material thus
removed shall be replaced with bedding material.
3 -B GRADE LINES
The Contractor shall maintain the correct grades batmen manholes and shell
cheek all intermediate grade stakes by means of a taut grade wire betxeen at
least three intermediate grade stakes. in the event that tl:e grade stakes do not
line up, the xork shall be slopped until the situation fs corrected. Ail bench
marks, reference posts and stakes shah be preserved. in case of destruction
of any of them, the resulting expense of restoration shag be borne by the
Developer. Construction staking shaD consist of grade stakes at 10 foot
offsets. Stakes at each manhole and intermediate grade stakes sheD be offset
10 feet and located at 50 foot stations batmen manholes. Laser beam
equipment for grade and alignment control is an acceptable alternative.
3 -9 PIPELAYING
Each pipe shell be laid xith bells upgrade end the invert of We pipe to the
alignment and grade shorn on the Plans. Concentric joints shall be closed
end a smooth sverl provided. Open ends of pipes or,fitWgs shell be
temporarily blocked or covered when laying is not in progress.
Adjustment to the line and grade shall be done by scraping any or tilling
end tamping bedding material under the body o[ the pipe. No xedging or
blocking of the pipe (or adjustment to line and grade may be done.
The pipe shall be loxered into the trench by means of ropes, tripod, crane or
any other suitable means, shall not be dropped or handled roughly, and shall
be checked for cracks and ddects before installation. Any cracked or
detective pipe shall not be installed.
Tees, ayes and standing services shaft be instaNed as shown s the Standard
Details herein and at such locations as shown on the Plans, or as otherwise
directed by the District They shall not be covered vntfl the District has
completed inspection sad recorded their eaact location.
Variance from established line and grade shall not be greater than 1 %32nd of
an inch per inch of pipe diameter, but shall not exceed 1/2 inch or result in
a level or reverse sloping tweet
3 -10 PIPE JOINTS
No joints shaD be covered untH examined and approved by the District Only
pipelapers experienced xith the type of gasket being used s the xork shaD
be alloxed to lay pipe. Oo the request of the District proof of such
experience shag be funished before laying may begin.
Joint material shall be installed according to the manufacturer s
recommendations. After the gasket has been affixed, the pipe shall be
handled to avoid bumping the gasket. knocl®g opt of position or loading it
xith dirt or other foreign material Any gasket so disturbed shall be removed,
replaced, deaned and relubricated before the joint is made. The pipe shag be
properly aligned before the jolt is forced home. During insertion of the
lounge or spigot. the pipe shah be partially supported by hand, sling or crane
as required to minim v� lateral pressure on the gasket and to mortar
concentricity until the gasket is properly positioned Pipe deflection and
strsightening shall be avoided once the joint is home, to prevent creep of the
joint
SufSeient pressure shah be applied s making the jolt to assure that the joint
is home, as defined in the pipe manufacturer's standazd instructions for
installation. Sufficient restraint shall be applied to the ]se to assure the
joints, once home, aze hdd so by tamping fDl under and alongside the pipe
or other appropriate means. At the end of the days work, the last pipe laid
shall be blocked in such a manner as may be required to prevent creep during
downtime.
3 -il MANHOLES
Precast manhole base sections shall be placed on swell- compacted beddng
course of beddng material The depth of the beddng shall not be less than
4 inches thick, extending a minimum of 12 inches beyond the outside
perimeter of the base section. The balance of app remaining excavated area
shall be filled with imparted backfill material and well tamped to the level of
the top of the bedding before Ore manhole is set in place. The bedding shall
be well tamped and made smooWr and level to assure uniform contact support
to the precast elements.
All lift holes and the aside and outside face of rubber gasketed jolts
between precast sections shall be thoroughly�mtted, pointed, then filled xith
mortar, and smoothed both inside and oak Precast sections shall be placed
and aligned to provide vertical sides and vertical alignment of ladder rungs.
The completed manhole shall be rigid, true to dimension and mtertdght
Manholes set s paved streets or other paved areas shall be set to the finished
grade of the paving. When required, the manhole frame shall be trlted to
conform to the grade of the paved surface. M�..n)>Ales n.�+t sat in r v°� ar=.w.
shall be set at a finished grade slightly higher than that of the surrounding
terrain to prevent surface water infiltration sin the system. Manholes set
s unpaved areas shall have an asphalt pad, 2' thick and 6' in diameter
placed azound Ore manhole casting- Manholes at the end of a lse with no
inflow, shall have sloped floors to drain to the outflow. H there is inflow,
a channel shall be provided Unless needed to clear a paved road, stub -
outs and channels intended to faciliate future hookup shall be omitted.
Manhole channels shall be made to conform m the sewer grade and shall be
brought together with well - rounded junctions. Channel sides shall be carried
vertically to the crown elevation pf the various pipes. The concrete shelf
_ shall be smoothly finished with slopes to drain Channels shall not narrow
down to less than the inside diameter of the pipe.
All pipe openings, when practical, shall be cored before settsg the manhole.
Pipe connections shall be mada by use of a rubber boat connector, Kor -N-
Seal or equal
3 -12 BACRFHd.ING
No barJdilling shah be performed untH after the District has inspected the
installation of the pipe and bedding and approved backfiiling.
The isfiai beckfill shall be hand pieced select material spread evenly over the
bedding material and rnmpacted by hand to an elevation of 6 inches above
the croon o[ the Pice for Ductile Iron Pine and 10 inches above the crown
of the Pice for PVC. This shall be done in such a manner that subsequent
becfilDng wiD not disturb the pipe in any way. Subsequent Iffts of not more
than 2 -toot thickness shall be placed as shown on the Standazd Detafls and
individually compacted m a minimum of 90 percent maximum density.
Subsequent back511iog shag be performed by pushing material from the end
of the trench along and dnecOy over the pipe so that the material wiQ be
applied in a rolling slope, rather than by side filling. Bacldilling from ibe
sides of the french wnl not be done until the District has determsed that
material has been caretuflp placed war the pipe to a suffdent depth.
in areas such as existing paving, or in areas to be paved, where the District
determines that minor settlement xould be detrimental and the ¢alive excavated
material is not suitable for compaction as backfill, the trench shall be backfilled
rdth imported 6ackflB material as specified in Section 2 -7.
3 -13 COMPACTION OF BACKFILL
Compaction o[ bacl� and backfill procedures in public rights -of -way sha4
at the minimum, conform to the requirements of the governmental agency
having jurisdiction thereoL
Bac'.dnline shall be compacted to 95 uereent_of maamum- theoretical density
and to 9D percent of maxim® theoretical density in aB pthaz azeas.
Yeasorement of rnmpactfon density shell be by the modLeed AASHTO method.
Compaction of backSB shalt be achieved by power operated tampers, roller
nbration equipment or older meehaniml means. (later settling will not be
acceptable as a mmms of compaction H excavated materiel has a California
Bearing Ratio for compacted and soaked sample of less than 7, or for any
other reason cannot be compacted as specified, such excavated material shall
be replaced with imported backSB material No backfill shall be placed
without immediate compaction arxord'mg m these specfcatons.
The District will regoQe that the services of an independent testing laboratory
or colmty testing laboratory be empbryed to perform in -place density tests to
ascertain xhethaz the specified density can be or has been obtain. 'Phe
costs of these tests sbaIl be borne by the Developer
Regardless of the approval of the District as to the manner of compaction or
testing, Ore Developer shag reps¢ any settement of trenches and excavations
that may oxur withs tin years after completion and format acceptance of the
work by We District
3 -14 CLEANING AND FLASHING
Prior to Pipe testing, all Pipes shag be deaned as provided in this section.
An inflatable baR of a size that wtH Mate to frt snugly into the pipe shaIl be
furnished by the Contractpr and placed in the last manhole on the pipe to be
deaned 'Phe ball may be used rith a tag Brie ur a rope may be fastened to
the ball to locate and control its position at aII times later shall be
nttodaced behind the ball and the ball shag pass through the pipe with only
the force of the inter impe0ing it AH debris fhished ahead of the ball shall
be removed at the fast manhole where presence of the debris is noted s the
event that cemented or xedged debris ur damaged pipe sbaR stop the ball, the
obstruction shall be removed
1-16 TESTING OF PRESSURE SEDER P]PE
All force mains shall be tested et a msim� pressure of at least 50 percent
above Ore design opem{mg pressure for at least 311 wearer Leakage shall
not exceed the amommt given 6p the folloring formula: �-
L= ND�
1850
Where: L = aHorable ka +tape iD gaDons per boor
N = tke mm�ber � Pipe joists
D =the pipe diameter in inches
P =the test pressure m psi
t -17 B -INCH SIDE SEWER FROM MADN TO PROPERTY LiNE
The material and strength dose of stile sewer pipe shag be the same as the
sewer pipe fo which it commects a� these specifications shag be applicable
to side scorer work The slope of side sewers shay' not exceed 2 -foot vertical
to I -foot horizontal sad grade shaO rpt be Less than 2 percent Side screens
shall have mi ®ran 48" cover. llt� ehavge in slope exceeds 2 mchea per foot,
standard wye bends shag be aced All side sewers shall be phrgged and the
plugs blocked
The ends of all side sewers at the property fines shag be marked xiOt a
2" x 4" board. the txttom of rbfch shaft be located of the inert of
the end of fire side saner and the tap of which shaft be painted green and
extended 4 feet above the pro ®d with the length of the board a� kobeled
Sb11ER" in 2" high whffe steneDed letter` 9Tre entrte of the board sbaIl
be wrapped with a heavy gauge wire which is aOaehed fo the spigot end of the
pipe.
i -18 CONNECTION TO THE E%fSTBYG SYSTEM
No connections shaft be made to the exstng serer system witbwt the
presence of the District Written appHcafioa for rarnneetfon shag be made to
the District for connection, and the correction shall. be made of a trme agreed
upon with Ore District.
Connections to casting manholes shag be made as folbrs: N Ore manhole
is °live; manhole ebannd shaD be tightly covered, Pray to brea�g into
Ore manhole wall, fo prevent debris from eniersg Ore serer line_
Immediately after the comtecton is made, Ore new pipe shall fie phrgged.
the phrg shag not be removed wiihord person of the District H Ore
erisWvg mannhole is not °five, "aping shaII be iaataRed in the domstream or
discharge pipe of Ore esisiing manhole is addrtan to the above.
Connections of oar moms to esistng serer Tmeg shall be made as foDms
A near manhole shag be placed over the existing T� life manhole sbaB be
precast 54 -inch diameter except Wet Ore base stab shall be cast in place the
per connection shall be plugged end 6lpeked mmd the existng sewer pipe
shaD not be opened without the permission of fire District
Connections of side sewers to an e%istsg saver tine shag be made as foDuws,
or as d'n�ected by the District ]fpgineer.
A) For ducine von pipe, the conn�on shalt be made with a stainless
steel, or stainless steel xiOr dnosle iron liana .tapping tae, Romae '.
modd "S5T" or equal AFL by MJ adapter is req�ed. ',..
B) For PVC or AC pipe, Ore conneetiore shag 5e made wish a serer
saddle. Romac style LB" or egaaL
The emstsg sewer pipe shag be cnE or dented fo give a smooth symmetrical ',.
oPeninA of the Proper sine_ Eaeh rnnmNri�.. s.rH be bedded wish a 4-- ,.,��. '�.
3 -15 TESTING OF NON- PRffiSIIRS SEVER P]Q'8 - DEFLECTION
Unsuitable foundation material shall be averexeavated and replaced rift
bedd'mg material
TESTING FOR Ff S%IDLE SEWER PD?E
All non - pressure sewer pipe shall be air tested 'the procedures set forth in
3-19 TRAFFIC CONTROL
this section �aH be empforu m couaucaug tin tcc, -uog. AH :amlifiet aria
SLANT q.A�
o200�.00
personnel for conducting We testing ender the obseructon of the District shall
AD traffic control shall be par Ore Manual of Uniform Tiatfie Control Devices,
be furnished by the Developer. All equfpment aria personnel to conduct the
and /or agency of jurisdicfioa During construction, tra€fie shall raft be delayed �..,,
test shall be sub'ect to tbe approval of the District Atthongh air testing may
far more than 5 minutes unless previously approved by Ore Distrct and the �,,.
be performed for the convenience of Wee Contractor before bacldlDng, no
agency of jurisdiction
Pipe shaD fie accepted mtr1 air tests have 6emm performed after backfflUng and
compacting.
�,
3 -20 T.V. INSPECTION
All xpa, tees and mmds d std` sewer stabs shaD be pbrgg� xnh flerible
Prior to acceptance, aIl pipe shaD be flushed ai Ora coa�adors expense amt
T.V. inspected by the District at contraemr.: exflen�. Coniract� shall notifg
joint caps, or an alternate acceptable to the Distric; and sermrely fastened to
the District 48 hours pier io the need for noshing amt T.F inspectina AH
xithstand the internal felt pressure. Such plugs or caps shall be readily
manholes must be channeled, the serer system completed and the rvadmy
removable and the¢ removal shaD provide a socket suitable for making a
subbase insta8ed before the T.V. inspection. Sewer dye, Norfab or approved
flen"61e- jointed lateral connerton or eafensian. No donbie plugs shaIl be
equal shall be introduced into the system prior to Ore T_V- inspection, fl required.
used
The T.V. camera must be puDed through the pipe xithout use of a hydranHc
Immediately fotloxsg the Pipe draai�na and manhole channeling the pipe
flushing nozzle. aH5 video tape of this inspection shall be svlmritted to the ',.
District along with a completed caztified report by the Contractor. Yrdeo must
instaIled shaIl fie tested xith low pressure aft. Air shaIl fie slowly supplied
start at the downstream manhole sad proceed upstream against the IIec
to the plugged pipe installation nnhl the sternal air pressure reaches 4.0
AD defects revealed by Ure T.V. inspection shall be repaired by Ore Contractor
pounds per square inch garter than the average back pressure of app grormd
to the District's satisfaction Any pipe or sanitary manhole chanaet with a sag
water that may submerge Ore pipe. M least tin mnutes shall be alloxed
that creates a standng rater depth of 1/4 -sob. may be rejeet� by the llis€riek '
for temperature stabiUaation before future procedure. A pressure gauge with
(No sag of 1/2 -inch or greater wiIl be accepted) Depending on the severity a�
a mearmum of 30 psi siudl be used tot testing.
extent of the defects, the IBstrlet map require that the eeigt pips run be
The pipe shaIl be acceptable if the time required in seconds for the pressure
relayed. �,,,.
to decrease from 3.5 to 311 psi greater than the average back pressure is equal
'.
to or Beater than r'•e listed valves far corresponding sizes of pipe shorn on
3-21 SIDE SEWERS
Ore air test graph located elsewhere s Part Four. Hazazds created by use of
air pressure for testing pipe shall be guarded against, and all plugs shaD be
Aside sewer ermit will be re uuad from the District before installatan of
P 4
securely blocked to prevent blomuts. A supply air regulator shall be
side sewers. Commercial waste dischazge from fixtures and equipment that
instated nn the air s<rpply to the s..o..r that wilt allow only a marimum
may contain grease, scluasg but not limited to, scullery sinks, pot and pan
of 6 psg s the Ise to be tested and all pressure shaD be relieved from the
sinks, dishxashers, soup kettles, and floor drains located s areas where
sewer 1me before removal of test plugs.
grease containing materials may exist, will require a pease sterceptur prior
to entering the sanitary sewer system. Commercial estabBshmenfs teat may
When required by the Engineer, all sanitary sewer constructed of flexible
discharge aB rte the sanitazy sexes system wilt require an oil separator prior
pipe shall be deflection tested not less than 30 days after the trench baeldill
to entering the sewer system.
and compaction has been completed The test shall be conducted by puling
a so8d posted mandrel with a diameter equal to 95 percent of the pipe
3 -22 STREAMGUARD CATCH BASIN INSERTS
diameter through the completed pipeline. Testing shall be conducted on a
manhole -to- manhole basis and shag be done after the tae has been
All catch basins located along project shall hay= a streamguard sediment catch
completely flushed out xfth inter. The Contactor will be required, at his
basin insert model 9226 as manufactured by Ultra -rain Girard, model 3003 as
expense, to locate and repair any sections faitsg to pass the test and to retest
manufactured by Foss Envitonmentat or approved equal installed. Inserts are to
the section
be cleaned and replaced bg Contractor per manuiactureis recommendations or
by District direction.
5- ?96 ?03
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C �, �` >9dz a3 SCANNED SEP 13 2002
PART TWO AND THREE: TECHNICAL SPECIFICATIONS
� � � � � � � � � � �' ®� �
APPROVED:
COAL CREEK 7415 129TH AVE. S.E.
� UTILITY DISTRtC� NEWCASTLE, WASHINGTON 98056
TELEPHONE: 235 -9200
SLANT q.A�
o200�.00
REVISED PER DISTRICT COMMENTS
6/18/01
DBH
REVISED PER DISTRICT COMMENTS
1 21/01
/
DBH
PRESIDENT BOARD OF COMMISSIONERS DATE
SHEET N Q.
3 Oj= 4
REVISED PER DISTRICT COMMENTS
7�21�00
DBH
SECRETARY BOARD OF COMMISSIONERS DATE
REVISED PER DISTRICT COMMENTS
4 17 98
DBH
lET'fE(l No
REVISIONS
DATE
APPROVED
COMMISSIONER DATE
vvwP -=7- ��2
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C �, �` >9dz a3 SCANNED SEP 13 2002