Sewer Description

8/11/2019 Sewer Description

1/27K:\Current Development Standards\2011 PW Dev. Standards\SECTION 2 Sewer\DETAILS COVER AND TABLE CONTENTS.doc

SECTION 2

SEWER DETAILS


2/27K:\Current Development Standards\2011 PW Dev. Standards\SECTION 2 Sewer\DETAILS COVER AND TABLE CONTENTS.doc

STANDARDDETAILS:

SEWER MAIN INSTALLATION................. ............................ ............................ ... ATTACHMENTSEWER TANK ABANDONMENT POLICY ............................ ......................... ...... ATTACHMENTSANITARY SEWER TRENCH.............................................................................................SS-1048 DIAMETER PRECAST CONCRETE MANHOLE...........................................................SS-2048 DIA. PRECAST CONCRETE MANHOLE WITH DROP CONNECTION.........................SS-21

NEW MAIN & MANHOLE CONNECTION TO EXISTING MAIN...........................................SS-22NEW MAIN CONNECTION TO EXISTING MANHOLE ..................... ............................ .......SS-23MANHOLE COVER ADJUSTMENT PATCH GRAVEL AREAS........................................SS-25MANHOLE COVER ADJUSTMENT PATCH ASPHALT AREAS ......................... .............SS-26MANHOLE 24 X (4 OR 6) FRAME AND COVER.................................... SS-27 and SS-27ASIDE SEWER CONSTRUCTION WITH TAP ON EXISTING MAIN ......................... .............SS-30SIDE SEWER CONSTRUCTION FOR NEW DEVELOPMENT ....................... .....................SS-31SANITARY SEWER MAIN CLEANOUT ........................ ......................... ........................... ..SS-40PRIVATE FORCE SEWER SERVICE..................................................................................SS-61SINGLE FAMILY GRINDER PUMP SPECIFICATIONS.......................................................SS-62TYPICAL UTILITY SERVICE LAYOUT FOR NEW PLATS.................................................. MI-10KOR-N-SEAL (FLEXIBLE PIPE TO MANHOLE CONNECTORS) ........................ ATTACHMENTCHERNE INSIDE THE PIPE GRIPPER PLUGS ............................ ....................... ATTACHMENT

PRETREATMENT OF WASTEWATER ......................... ......................... .............. ATTACHMENT


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K:\PW Details\sewer installation.doc

CITY OF ELLENSBURG

SEWER INSTALLATION

9-23-09

ALL SANITARY SEWERS SHALL BE CONSTRUCTED IN ACCORDANCE

WITH THESE SPECIFICATIONS, THE CITY OF ELLENSBURG STANDARDPLANS, AND THE STANDARD SPECIFICATIONS FOR MUNICIPAL

CONSTRUCTION AND AS STAKED BY THE ENGINEER.

The following is an outline the City of Ellensburg requires for sewer construction.

The Contractor will furnish and operate all tools and equipment needed to complete theproject, including safety, dewatering, pipe installation, pipe cleaning and testing.

Pipe laying

1. Bedding shall provide uniform support along the entire barrel without load

concentration at joint collars or bells. Blocking will not be allowed to adjust pipeto grade.

2. Sewer pipe will be laid to a true line and grade at the invert of the pipe. The sewerpipe shall be laid up grade from the point of connection on the existing sewer. The

pipe shall be laid with the bell forward or upgrade. The forward end of the bell

shall be kept tightly closed with an approved temporary plug.3. Ground water is strictly prohibited from entering a sanitary sewer. Sediment must

be removed from ground water before it is allowed to enter a Storm drain. Obtain

City approval prior to discharge into a Storm drain.

Joints

1. Joints shall be clean of dirt and other foreign material. Any gaskets that are

disturbed or rolled shall be removed, replaced, and relubricated before joining the

pipe sections.

2. The Contractor shall use a factory-fabricated adapter coupling as approved by theEngineer to join dissimilar pipe.

Service line connections

Taps into existing sewer mains shall be performed by the City. The contractor is

responsible for exposing the main, providing shoring, backfill and surface restoration.

Protection of existing sewer facilities

1. All existing live sewers shall be kept in service at all times. The Contractor shall

make provisions for handling and disposing of sewage flow. The Contractor shallrepair damage to existing sewers. The City must inspect all repair work.

2. Whenever possible, the contractor shall plug the downstream end of the sewer

prior to construction. Any debris of water in the new line shall be cleaned by the

contractor prior to removal of the plug.

Backfilling sewer trenches

1. Backfilling in the vicinity of catch basins, manholes, or other appurtenances willnot be permitted until the cement in the masonry has thoroughly hardened.


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2. Backfill above the pipe shall be accomplished in such a manner that the pipe will

not be shifted out of position or damaged. Compaction shall be as indicated in theplans and specifications.

Cleaning and testing

1.

The contractor will be responsible for cleaning the new line prior to testing andinspection. All work involving cleaning and testing of sewer lines shall be

accomplished within fifteen working days after backfilling. The Contractor shall

test sewer lines by low air pressure, or as approved by the City, in the presence ofa City inspector.

2. The City will perform television inspection on mains.

3. If any sewer installation fails to meet the requirements of the test method used,the Contractor will determine the source of the leakage or defect and perform the

repair.

Air Pressure Test

Refer to APWA Standard Specifications for Municipal Construction 7-17.3 (4) d.

Water Testing

Refer to APWA Standard Specifications for Municipal Construction 7-17.3 (4) b.

Television inspection

1. Television inspection will be required of new sewer mains. Costs incurred in

making the initial inspection will be included in the permit from the City.

2. The Contractor will bear all costs incurred in correcting any deficiencies foundduring the television test, including the cost of any additional television inspection

that may be required to verify the correction of the deficiency.

The City of Ellensburg sewer crews will TV the sewer mains once the contractor has

completed the following items:

1. The new line has passed the pressure test and there are no repairs or changes

needed.

2. The line is clean of ALL debris and has no leaks in the pipe or manholes.3. The TV crew requires firm, smooth, unyielding access to all manholes (preferably

crushed rock).

4. All other utilities in the vicinity of the sewer main need to be in before any testing cantake place.

This reduces the risk of disturbances to the new line.

Call the sewer department 72 hoursin advance of needing the test or schedule through your

inspector. The pipe will need a minimal amount of water ran through it to allow the camera

to check for bellies and sags. The maximum belly allowed in the pipe is .

It is strongly advised that completion and acceptance of all tests occur in a timely fashion to

allow ample time for the rocking and paving of the roads.


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Plugging an abandoned sewer pipe

All holes created in an abandoned sewer main shall be sealed with a disposable plug andcemented in to provide a leak proof seal.

All inspections, taps, and tests require 2 working days notice to the City.

City of Ellensburg contact numbers. If you have any questions, please call.

Assistant Public Works Director 962-7133

Permits - Engineering Dept. 962-7233

Inspection - Engineering Dept. 962-7135

City Engineer 962-7238

Wastewater Treatment Plant Foreperson 962-7277


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K:\PW Details\Septic Tank Abandonment Policy.doc

CITY OF ELLENSBURG501 N. Anderson Street; Ellensburg, WA 98926

Ph: (509) 962-7230 Fax: (509) 962-7127

SEPTIC TANK ABANDONMENT POLICY

The City of Ellensburg Sewer Department has the following policyregarding abandoning septic tanks within the City of Ellensburg.

1.

All septic tanks that are abandoned must be inspected or verified by the SewerDepartment. The abandonment inspection or verification is required with orwithout side sewer connection of the property to the City Sewer system. The

Sewer Permit for inspection must be obtained from the Public Works

Department.

2. The lid of the septic tank shall be removed or destroyed. The septic tank mustbe pumped out and filled with clean fill. Call the City Sewer Department at

962-7277 to schedule the inspection of abandoned septic tank. This may be

done at the same time as inspection of a new side sewer connection to a City

sewer main.

3. The contractor shall provide the Sewer Department a copy of the bill from aseptic tank pumping company as proof of that the tank has been pumped out.

The copy of the bill shall be provided within 2 weeks of the septic system

abandonment.


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PRIVATEGRINDER

PUMP

2" MIN. SCH 40 PVC OR HDPE

FORCE SEWER SERVICE(w/ PEA GRAVEL BEDDING)

(PIPE SHALL MEET THE REQ.

OF GENERAL NOTE #1)

PVC SE

PER DETAIL

21

NOTES:

1. IF PUMP IS LOCATED WITHIN 2' OF T

SHALL BE INCLUDED IN THE CITY OSHALL MEET THE REQUIREMENTS OAS THESE REQUIREMENTS. IF OUTS

DETAILS SHALL APPLY. A PUBLIC WSEWER SERVICES.

2. SEE STANDARD DETAIL SS-62 FOR S3. A PVC GRAVITY SEWER SERVICE SH

THE EDGE OF RIGHT OF WAY. A SE

WITHIN 5' OF THE REDUCER.4. THE 2" PVC FORCE SERVICE LINE SH

TO THE 4" GRAVITY SERVICE LINE.

REQUIRED, SHALL BE USED TO GO F

LINE. A 2"x4" REDUCER SHALL BE U

CLEAN OUT @BEGINNING OF

GRAVITY SERVICE

4

2" CLEAN OUT

GENERAL NOTES:

1. ALL FORCE SEWER SERVICE LINES SHALL BE HYDROSTATICALLY TESTED AT A MINIMUM

PRESSURE OF ATLEAST 50% ABOVE THE DESIGN WORKING PRESSURE, AND SHALL BE INACCORDANCE WITH THE MOST CURRENT REQUIREMENTS OF THE DEPT. OF ECOLOGY.

2. ALL FORCE SEWER LINES SHALL HAVE WATERTIGHT CLEANOUTS INSTALLED AT MAX.

SPACINGS OF 100' AND AT AGGREGATE HORIZONTAL DIRECTION CHANGES OF 135.3. EACH CLEANOUT SHALL BE INSTALLED SO THAT IT OPENS TO ALLOW FOR CLEANING IN

THE DIRECTION OF FLOW, AND SHALL BE INSTALLED VERTICALLY ABOVE THE FLOW LINEOF THE PIPE.

4. CLEANOUTS SHALL BE INSTALLED TO ABOVE GRADE, AND SHALL HAVE A MINIMUM OF 12"OF CLEARANCE IN FRONT OF CLEANOUT.

5. ALL FORCE AND GRAVITY SERVICE LINES SHALL HAVE PEA GRAVEL BEDDING (4" ABOVEAND 4" BELOW PIPE).

6. ALL FORCE AND GRAVITY SERVICE LINES, CLEANOUTS, PUMPS, WET WELL, ECT., SHALLREMAIN UNDER THE OWNERSHIP OF THE PROPERTY OWNER WHO SHALL BE RESPONSIBLE

FOR THEIR OPERATION AND MAINTENANCE.

7. PERMITTEE SHALL SUBMIT DRAWING SHOWING LOCATIONS OF PUMP, CLEANOUT(S), ANDFORCE LINE. ALSO INCLUDED IN THE SUBMITTAL SHALL BE STORAGE CAPACITY, AND PUMP

SPECIFICATIONS AND CURVE (TOTAL HEAD IN FEET vs. CAPACITY IN G.P.M.).

RIGHTOFWAYLINE

SIZE 12 USEGREEN PLASTIC

SOLID COPPERTRACER WIRE

CLEANOUT REQUIREDWITHIN 5' OF PUMP

I

SC

P

P

TW

SEWER MARKINGTAPE, 1' ABOVE

TOP OF FORCESEWER SERVICE


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K:\PW Details\KOR-N-SEAL CONNECTORS.doc

KOR-N-SEAL (Flexible Pipe to MH Connectors)


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K:\PW Details\CHERNE Plugs.doc

CHERNE (Inside the Pipe Gripper Plugs)


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K:\PW Details\CHERNE Plugs.doc


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Department of Public Works Sewer Division

POLICY AND PROCEDURE

Pretreatment of Wastewater

1.0 PURPOSE

1.1 This procedure establishes the rules for discharge of water or wastes into the City ofEllensburg sewer system.

2.0

ORGANIZATIONS AFFECTED

2.1 City of Ellensburg Sewer Division

3.0 DEFINITIONS

3.1 BOD Biochemical Oxygen Demand means the quantity of oxygen utilized in the

biochemical oxidation of organic matter under standard laboratory procedure in fivedays at twenty degrees centigrade, expressed in parts per million by weight.

3.2 Composite Sample - A combination of individual samples of water or wastewater

taken at selected intervals, generally 8 samples collected over a 24 hour period, tominimize the effect of the variability of the individual sample.

3.3 Grab Sample - A single sample of wastewater taken at neither set time nor flow.

3.4 Owner - The title holder or proprietor of property.

3.5 pH - The logarithm of the reciprocal of the weight of hydrogen ions in grams per liter

of solution.

3.6 Suspended Solids - The solids that either float or are in suspension in water, sewage

or other liquids, and which are removable by laboratory filtering.

4.0 POLICY

4.1 Pretreatment facilities shall comply with the applicable requirements and regulations

of local, federal and state, Chapter 173-240 and Section 173.216.110 of the

Washington Administrative Code (WAC), Revised Code of Washington (RCW)

90.48.010,and the Uniform Plumbing Code as now or as they may be amended, andwith the accepted plan of operations and maintenance procedures.

4.2 The requirement for any and all such pretreatment devices and equipment exterior tothe building shall be determined by and shall be subject to the approval of the

Director of Public Works; devices and equipment interior to the structure shall be

determined by and subject to approval by the Building Department and the Director

of Public works..

4.3 Review of plans by the director of Public works shall in no way relieve the dischargerfrom the responsibility of modifying its facility or process as necessary to produce an

acceptable effluent under the provisions of this ordinance.

4.4 All Pretreatment devises, including grease interceptors and traps, sedimentationchambers, chemical or biological plants and other devices to remove pollutants prior

to discharge to the sanitary sewer must be located as to be readily accessible for


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cleaning, sampling, and inspection. Dischargers must maintain pretreatment devicesin a manner that will always prevent fat waste, oil grease, flammable wastes, sand or

other harmful ingredients from being carried into the sewer system. The owner shall

be responsible for the proper removal and disposal of wastes captured and shall

maintain records of the dates and means of disposal, which shall be available forreview by the director or representative. Collected materials shall not be disposed of

in sanitary, industrial or storm sewers. Failure to provide or maintain pretreatment

devises such as grease, oil and sand traps in accordance with the provisions of this

section shall be a violation and subject to the sections Municipal Code 9.94

4.5 All costs associated with installing, maintaining, and testing of any and all requiredpretreatment facilities are the sole responsibility of the owner.

4.6 No statement contained in this policy and procedure shall be construed as preventing

an agreement between the city and any industrial concern whereby an industrial waste

of unusual strength or character may be accepted by the city for treatment, subject topayment therefore, by the industrial concern provided that the following criteria are

met:

4.5.1 The city has the physical capacity for treatment; and (Currently and in the

future)4.5.2 The industrial waste is compatible with the biological treatment process as

determined by the city.

4.7 Separators shall notbe required for private living quarters or dwelling units.

5.0 PROCEDURES

All measurements, and analyses of the characteristics of wastewater, to which reference is

made in this policy and procedure shall be determined in accordance with the latest edition of"Standard Methods of the Examination of Water and Wastewater" published by the

American Public Health Association, and shall be determined from an approved samplinglocation provided by the owner.

6.0

GREASE INTERCEPTORS

Grease, oil and sand interceptors shall be provided in commercial and or retail food

preparation operations, regardless of size when, in the opinion of the Director of PublicWorks, they are necessary for proper handling of liquid wastes containing floatable or

emulsified grease, fats or oil in amounts exceeding those specified in section 9.25.310.F).

This shall include Dischargers who operate restaurants, cafes, lunch counters, cafeterias, bars

or clubs: or hotel, hospital, sanitarium, factory or school kitchens: or other establishment that

serve or prepare food where grease may be introduced into the sewer system shall havegrease interceptor (grease traps) to prevent the discharge of fat waste, oil or grease. Take out

food establishments or other establishments that prepare food but do not cook in oil orgrease, and who serve only in disposable containers, may be exempted from this requirement,

provided their discharges do not violate section 9.25.310-(F) general discharge prohibitions

of this chapter.

All wastes discharged into the food processing sewer will be adequately screened by a twenty

mesh or finer screen before discharge. An additional screen, with openings no larger than one


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quarter square inch shall be installed in a fixed position so all materials must pass throughsaid screen immediately before entrance into the sewer.

Commercial garbage disposals or grinders are not recommended. Enzymes, bio additives

chemical degreasers and hot water flushes are prohibited from entering the grease interceptoror trap.

Size and design of the grease interceptor shall conform to the Uniform Plumbing Code

Standards most recently adopted by the City and be subject to approval by the Director ofPublic Works in conjunction with the Building Department.

7.0 SUPPORTING DOCUMENT IN APPENDIX

Sewer Description

Documents

Transcript of Sewer Description