33 05 05.36 - Vacuum Testing.pdf
PDF 215 KB Posted
- Solicitation number
- Not on record
- Issued by
- Lancaster County, Pennsylvania
About this file
This is a technical specification document for vacuum testing of sanitary sewers prepared by Herbert, Rowland & Grubic, Inc., applicable to the Borough of Elizabethtown's sanitary sewer improvement projects in Pennsylvania. The specification establishes requirements for vacuum testing of all newly installed manholes and existing manholes where new sewer mains connect, with testing to be performed in accordance with ASTM C1244 standards. The testing procedure requires equipment including a vacuum pump, vacuum tester base with compression band seal, shutoff valve, calibrated vacuum gauge (to 0.1 in. Hg), stopwatch, and plugs. Test duration varies by manhole diameter: 60 seconds for 4-foot diameter, 75 seconds for 5-foot diameter, and 90 seconds for 6-foot diameter structures. The specification requires contractors to submit testing procedures, equipment lists, testing sequence schedules, and gauge calibration certificates prior to initiating testing, with final test and evaluation reports documenting all results.
The specification establishes an acceptance criterion whereby a manhole passes testing if the vacuum drop does not exceed 1 inch of mercury during the prescribed test period. Contractors must repair both interior and exterior joints to ensure permanent seals and repair any visible leaks regardless of leakage quantity. All joints must be repaired and sealed prior to testing with the manhole frame in place and backfilled. If vacuum drop exceeds 1 inch of mercury, the contractor is obligated to identify and correct the causes, complete repairs, and retest the manhole until successful results are achieved. No pricing, funding sources, or contract terms are specified in this technical specification document.
View the file
Other files
Show 40 more
Latest 50 of 77 listed here. See the rest on GovTribe.
On GovTribe
Work with this file
- Download the original file
- Contacts named in this file
- Similar government files
- Ask GovTribe AI about this file
Text version
33 05 05.36 - VACUUM TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.36 - 1 000598.0465
SECTION 33 05 05.36 - VACUUM TESTING
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes: Vacuum testing of manholes.
B. Related Requirements:
1. Section 33 05 61 – Concrete Manholes: Requirements for sewage manholes.
2. Section 33 31 00 - Sanitary Sewerage Piping: Pipe materials, manholes, and accessories normally encountered with gravity sewerage piping.
1.2 REFERENCE STANDARDS
A. ASTM International:
1. ASTM C1244 - Standard Test Method for Concrete Sewer Manholes by the
Negative Air Pressure (Vacuum) Test Prior to Backfill.
1.3 SUBMITTALS
A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.
B. Submit following items prior to start of testing:
1. Testing procedures.
2. List of test equipment.
3. Testing sequence schedule.
4. Certification of test gauge calibration.
C. Test and Evaluation Reports: Indicate results of manhole tests.
1.4 REQUIREMENTS
A. Vacuum Testing shall be performed to all installed manhole(s).
B. Vacuum Testing shall be performed for all existing manhole(s) where new sewer mains are being connected to.
C. The Contractor shall determine and correct the causes of testing failure and retest until successful test results are achieved.
PART 2 - PRODUCTS
2.1 VACUUM TESTING
A. Equipment:
1. Vacuum pump.
2. Vacuum line.
3. Vacuum Tester Base:
33 05 05.36 - VACUUM TESTING
Herbert, Rowland & Grubic, Inc. 33 05 05.36 - 2 000598.0465
a. Compression band seal.
b. Outlet port.
4. Shutoff valve.
5. Stopwatch.
6. Plugs.
7. Vacuum Gauge: Calibrated to 0.1 in. Hg.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Section 01 73 00 - Execution Requirements: Requirements for installation examination.
B. Verify that manholes are ready for testing.
C. Verify that manholes are backfilled.
3.2 FIELD QUALITY CONTROL
A. Section 01 40 00 - Quality Requirements: Requirements for inspecting and testing.
B. Manhole Testing:
1. Repair both outside and inside of joint to ensure permanent seal.
2. Test manholes with manhole frame set in place.
3. Vacuum Testing:
a. Comply with ASTM C1244.
b. Plug pipe openings; securely brace plugs and pipe.
c. Inflate compression band to create seal between vacuum base and structure.
d. Connect vacuum pump to outlet port with valve open, then draw vacuum to 10 in. Hg.
e. Close valve.
f. Manhole Test Duration in Seconds:
1) Manhole Diameter of 4 Feet: 60.
2) Manhole Diameter of 5 Feet: 75.
3) Manhole Diameter of 6 Feet: 90.
g. Record vacuum drop during test period.
h. If vacuum drop of 1 in. Hg does not occur during testing period, manhole is acceptable; discontinue testing.
i. If vacuum drop is greater than 1 in. Hg during testing period, repair and retest manhole
j. If after repair vacuum test fails to meet 1-in. Hg drop during testing period, repair and retest manhole.
4. If unsatisfactory testing results are achieved, repair manhole and retest until result meets criteria.
5. Repair visible leaks regardless of quantity of leakage.
END OF SECTION
File details come from the government source that posted it. Updated .