SECTION 01710 CLEANING
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Cleaning of existing tanks and facilities to be modified.
B. Cleaning during construction.
C. Dust control.
D. Final cleaning.
1.2 DISPOSAL REQUIREMENTS
A. Conduct cleaning and disposal operations to comply with codes, ordinances, regulations, and anti-pollution laws.
1.3 SEQUENCING REQUIREMENTS
A. Sequencing of tank cleaning shall be as specified in Section 01100 SUMMARY OF WORK.
PART 2 PRODUCTS
2.1 MATERIALS
A. Use only those cleaning materials that will not create hazards to property or damage surfaces of material to be cleaned.
B. Water for Cleaning: Treated plant effluent (W3) is available for use by the Contractor. Contractor shall provide temporary pumping and piping facilities to transport water. City water (W1) and / or non-potable water (W2) is available for use by the Contractor. Owner will pay costs of W1 and W2 water. Contractor shall provide temporary pumping and piping facilities to transport water as required.
PART 3 EXECUTION
3.1 CLEANING OF EXISTING TANKS AND FACILITIES TO BE MODIFIED
A. Contractor shall provide notice to Owner at least 20 days prior to the scheduled date for commencing cleaning operations. The Owner will pump out tank contents to a level of
2.0 feet of side-wall depth, then take the tank out of service and turn over to Contractor.
B. Contractor shall provide ventilation and means required to enter the tanks using existing roof access. The atmosphere in the digesters while in service and prior to ventilation can have low oxygen levels. The Contractor shall provide all safety equipment necessary to access the tanks and shall operate all ventilation equipment necessary to adequately protect the Contractor’s personnel. The Contractor shall provide all gas testing equipment, confined space entry equipment, communications, and trained personnel required to meet all OSHA and State of Illinois regulations.
C. Contractor shall provide a general wash to remove wastewater residues and solids from interior tank walls, ceilings and floors. Tank contents will include aerobic digested sludge, inorganic solids (sand, grit, gravel) and organic debris (hair, rags, stringy materials, plastics). Contractor shall provide means and methods suitable for removal of tank contents, including pumps, hoses, connection to water sources, power, and lighting.
D. The Contractor shall be responsible for removal, dewatering, and for the final disposition of the materials from the tanks in a landfill and in accordance with all local, state, and federal regulations. Disposal of residual solids in the plant will not be allowed. Contractor shall provide temporary means of dewatering residual solids from tank cleaning operations. Centrate or filtrate generated during dewatering may be disposed of to a plant drain, as approved by the Owner. The Owner reserves the right to disallow disposal of any waste stream that may negatively impact or impair plant operations.
E. Before any tank contents are removed from the treatment plant site, documentation shall be submitted demonstrating that the CONTRACTOR will comply with all regulations. Landfill manifests shall be provided as verification of disposal at a licensed landfill. The CONTRACTOR shall coordinate all hauling activities with the landfill.
F. Flush and drain all piping to be modified prior to construction. Contractor shall provide additional cleaning as required for proper construction.
G. Existing structures requiring cleaning prior to modifications include the following:
Structure name
Plan Dimensions (ft x ft)
Sidewall height above footing (ft)
Sidewall height above existing grade(1) (ft)
Volume of residuals (gallons) (2)
Aeration Tank No. 1
Pass No. 1
154 x 40
19
10 – 17
61,300
Pass No. 2
154 x 40
19
11 – 18
61,300
Pass No. 3
154 x 40
19
12 – 18
61,300
Aeration Tank No. 2
Pass No. 1
154 x 40
19
9 – 16
61,300
Pass No. 2
154 x 40
19
9 – 15
61,300
Pass No. 3
154 x 40
19
8 – 15
61,300
Aeration Tank No. 3
Pass No. 1
154 x 40
19
10 – 14
61,300
Pass No. 2
154 x 40
19
12 – 15
61,300
Pass No. 3
154 x 40
19
12 – 15
61,300
Aerobic Digester No. 1
72 x 40
19.5
9.5 – 14.5
27,000
Aerobic Digester No. 2
72 x 40
19.5
9.5 – 14.5
27,000
Aerobic Digester No. 3
72 x 40
19.5
9.5 – 14.5
27,000
Aerobic Digester No. 4
72 x 40
19.5
10.5 – 14.5
27,000
Aerobic Digester No. 5
72 x 40
19.5
10.5 – 14.5
27,000
Aerobic Digester No. 6
72 x 40
19.5
10.5 – 14.5
27,000
Aerobic Digester No. 7
72 x 40
19.5
11.5 – 14.5
27,000
Aerobic Digester No. 8
72 x 40
19.5
11.5 – 14.5
27,000
(1) Varies
(2) Volume of residuals to be removed calculated to the top of the existing diffuser elements.
3.2 CLEANING DURING CONSTRUCTION
A. Execute periodic cleaning to keep Work, site, and adjacent properties free from accumulations of waste materials, rubbish, and windblown debris resulting from construction operations.
B. Provide on-site containers for collection and removal of waste materials, debris, and rubbish in accordance with applicable regulations. Remove weekly and dispose of off- site.
C. Thoroughly clean all spilled dirt, gravel, or other foreign material caused by the construction operations from all streets and roads at the conclusion of each day's operation.
D. Provide daily cleaning of facilities in use by the Owner when construction dust, mud or debris interfere with the Owner’s operations.
E. Remove debris and rubbish from pipe chases, plenums, attics, crawl spaces, and other closed or remote spaces, prior to enclosing the space.
F. Broom and vacuum clean interior areas prior to start of surface finishing, and continue cleaning to eliminate dust.
3.3 DUST CONTROL
A. Clean interior space prior to start of finish painting and continue cleaning on as-needed basis until painting is completed.
B. Schedule operations so dust and other contaminants resulting from cleaning process will not fall on wet or newly coated surfaces.
C. Give all roads and haul roads used in the construction area an approved dust-preventive treatment and/or daily watering when requested by the Engineer to prevent dust. Applicable environmental regulations for dust prevention shall be strictly enforced.
3.4 FINAL CLEANING
A. Employ skilled workers for final cleaning.
A.
B. Execute final cleaning prior to final inspection.
C. Clean interior and exterior glass and surfaces exposed to view; remove temporary labels, stains and foreign substances, polish transparent and glossy surfaces, vacuum carpeted and soft surfaces.
D. Clean all interior walls, ceilings, floors, cabinets, and furniture.
E. Clean equipment and fixtures to a sanitary condition with cleaning materials appropriate to the surface and material being cleaned.
F. Wash and shine glazing and mirrors.
G. Polish glossy surfaces to clear shine.
H. Ventilating Systems:
1. Clean permanent filters and replace disposable filters if units were operated during construction.
2. Clean ducts, blowers, and coils if units were operated without filters during construction.
I. Electrical Systems:
1. Leave electrical equipment rooms broom clean.
2. Clean interior of panel cabinets, pull boxes, and other equipment enclosures.
3. Wash and wipe clean lighting fixtures, lamps, and other electrical equipment that may have become soiled during installation.
4. Touch-up paint and repaint, if deterioration is extensive, electrical items delivered to job with finish coat of paint.
J. Clean debris from roofs, gutters, down spouts, and drainage systems.
K. Clean site; sweep paved areas, rake clean landscaped surfaces.
L. Remove waste and surplus materials, rubbish and construction from the site.
END OF SECTION
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