B08-Appendix_D_-_Utilities_Related_Standards.pdf

Appendix D

National Park Service US Department of the Interior

Park Facility Management Division

E X P E R I E N C E Y O U R A M E R I C A ™

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SECTION 01110—Summary of Work

PART 1: GENERAL

1.1 Reference Standards

When these Specifications state that work or tests shall conform to specific provisions in a referenced standard, specification, code, recommendation or manual published by an association, organization, society or agency, the referenced provisions, as they apply to the work of the Contractor only, shall be considered a part of these Specifications as fully as if included in total.

When these Specifications contain higher or more restrictive requirements than those contained in reference standards, these Specifications shall govern.

1.2 Specification Language and Style

Many parts of the Specifications are written in the active voice and are addressed to the Contractor.

When words or phrases requiring an action or performance of a task are used, it means that the Contractor shall provide the action or perform the task. For example: provide, perform, furnish, test, operate, adjust or similar words mean that the Contractor shall perform the action or task referred to.

When words or phrases requiring acceptance, approval, review or similar actions are referred to, it means that such actions are the Government’s prerogative and that the Contractor must obtain such action before proceeding.

PART 2: PRODUCTS (NOT USED)

PART 3: EXECUTION (NOT USED)

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SECTION 01355—Resources Protection

PART 1: GENERAL

National Park Service (NPS) areas contain areas of significant natural and cultural sensitivity that must be protected at all times. The contractor shall conform to the requirements set forth in this section to protect identified, suspected, or discovered natural and cultural resources within the project limits. Additional requirements may be described in other specification sections and shall be coordinated with the requirements of this section.

1.1 Description

The Contractor shall minimize environmental pollution and damage that may occur as the result of their work operations. The environmental resources, including natural, cultural and physical resources, within the project boundaries and those affected outside the limits of the work shall be protected during the entire duration of this contract. The Contractor shall comply with all applicable environmental Federal, State, and local laws and regulations. The Contractor shall be responsible for compliance with this section by its employees and its subcontractor employees. The Contractor shall be responsible for any delays resulting from failure to comply with environmental laws and regulations.

This section includes environmental procedures broadly identified as protection of natural, cultural and physical resources. The intention of this section is to ensure those involved with the project act positively to protect the environment, both on-site and off-site, during all construction operations.

All activities and requirements of a general nature are applicable to all areas within the National Park Service areas boundaries.

1.2 Submittals

The following submittals shall be submitted prior to the start of work:

A. Sewage Spill Prevention and Response Plan (an electronic version of SPRP template is available from the NPS Project Manager)

B. MSDS for all materials proposed for use

C. Hazardous Materials Spill Prevention and Response Plan

1.3 Environmental Protection Measures

A. The Contractor shall comply with these waste management measures and shall comply with all applicable Federal, State and local regulations and addresses all aspects related to the management of all hazardous and non-hazardous liquid and solid wastes.

1. Sewage Spill Prevention and Response Plan (SPRP):

a. The NPS requires that no sewage spills occur. The Contractor shall be required to abide by this zero-tolerance requirement and shall prepare a Sewage Spill Prevention and Response Plan and take appropriate spill prevention measures during all phases of work.

b. The primary purpose of the SPRP is to prevent sewage spills from occurring by proper planning and protection of the project area, and then to respond to any sewage spills that may occur during the course of this project including appropriate notification of staff. The Plan will be general in nature and typical to all phases of the work with site specific plans required where indicated in the individual specifications sections. The sewer lines may be located in close proximity to waterways and stream channels. Any and all spills must be kept from entering any water course.

c. The SPRP is structured in two parts – first a Spill Prevention Plan and then a Spill Response Plan. The Spill Prevention Plan (SPP) includes evaluation of specific conditions, set-up of preventative containment where necessary for actual work as well as for bypass pumping. Sewer bypasses must be constructed to tie existing lines together while bypassing work areas. The Spill Response Plan (SRP) includes the initial response to stop and contain a spill, notification of staff, clean-up, and follow-up documentation. The SPP and the SRP together comprise the entire SPRP. A page outlining the components to be included in the plan follows at the end of this Section. A Microsoft Word® version of a generic SPRP is available from the NPS Project Manager.

d. All Contractor employees are required to be trained in the Sewage Spill Prevention measures in accordance with this SPRP.

2. Non-Hazardous Solid Waste:

a. Waste, trash, and debris shall be controlled at all times and disposed in authorized containers located throughout the NPS area.

b. All sanitary waste (garbage) must be disposed of in approved disposal containers.

c. Contractor generated debris (rubbish) may be stored in approved containers or in designated sites and removed on a regular basis.

d. The contractor shall police the work site daily for waste, wrappers, food packaging and the like. All waste shall be picked up and disposed of in approved containers.

e. Burying or burning of trash and debris on-site is not permitted. All un-used materials, trash, and debris shall be the property of the Contractor and shall be transported outside of the NPS boundary for disposal in accordance with law.

3. Hazardous Materials and Wastes:

a. Identify potentially hazardous substances to be used on the job site.

b. Identify handling procedures to ensure that hazardous substances are not released into the air, water, or ground.

c. Comply with Federal, State, and local laws and regulations for storage, handling, and disposal of these materials.

d. Storage of hazardous or flammable chemicals in the staging area or elsewhere on the site is prohibited except as approved by the NPS Project Manager and/or Park

POC.

e. Hazardous materials shall not be discarded into the jobsite debris or waste-disposal facilities, but shall be taken to designated hazardous waste disposal facilities outside the NPS area.

f. Empty containers shall be removed from the site and disposed of in a manner prescribed by law.

g. Used lubricants and used oil to be discarded shall be stored in marked corrosion-resistant containers and recycled or disposed in accordance with 40 CFR 279, State, and local laws and regulations.

h. A copy of the Material Safety Data Sheets (MSDS) and the maximum quantity of each hazardous material to be on site at any given time is to be maintained on site and submitted to the NPS Project Manager and/or Park POC on request.

i. Before new hazardous materials are brought on site or removed from the site, the MSDS file shall be updated and submitted to the NPS Project Manager and/or Park

POC.

4. Contractor shall provide a Hazardous Materials Spill Prevention and Response Plan to address spill prevention and response measures for hazardous substances used on site, including fuels and lubricants. Prior to the start of work, the Contractor shall submit a plan that complies with NPS, Federal and State requirements and allows contractors to properly notify officials in the event of an emergency occurring during work activities. NPS requirements include at a minimum:

a. During non-work operations, stationary equipment shall be parked in designated areas. Equipment that is visibly leaking fluids shall be parked over specially prepared containment pads designed to trap any leaking oil, fuel, or hydraulic fluids. It shall not be used until such time as the leaks have been repaired.

b. Inspect work site daily for proper storage of hazardous materials, proper parking of equipment in designated areas, and for hydraulic and oil leaks of equipment, tighten hoses, and ensure they are in good condition.

c. Routine oiling and lubrication shall be conducted in areas with secondary containment using Best Management Practices (BMP) at all times. Refueling of equipment in wetlands or stream channel areas is not allowed at any time.

d. Contractor shall maintain secondary containment for all equipment operating with fluids (such as drilling) or when direct discharge of leakage, spills, or other source of construction or equipment fluids can flow directly to any streambed, whether flowing with water or dry. Containment shall be designed and installed so as to prevent accidental spills into streambeds in the event of mechanical failure or hose breakage.

e. Contractor shall maintain spill response materials on the project site when using heavy vehicles and/or equipment to ensure rapid response to small spills. These materials shall include absorbent pads, booms, or other materials as appropriate to contain oil, hydraulic fluid, solvents, and hazardous material spills. A list of the spill response materials to be kept on site shall be submitted to the NPS Project

Manager and/or Park POC.

f. Contractor shall provide names and phone numbers of appropriate contractor’s personnel to be contacted at any time (24 hours per day) regarding accidental release of hazardous substances to air, soil or water. This list shall be submitted to the NPS Project Manager and/or Park POC and a copy visibly displayed in work areas on site.

g. Contractor shall have the NPS Project Manager and Park POC and other appropriate Government emergency numbers posted and shall immediately notify the NPS Project Manager and/or Park POC or other Government representative on any accidental release of hazardous substances to air, soil or water.

B. The Contractor shall comply with these measures to protect natural resources. In addition, the Contractor must comply with any applicable Federal, State, and local regulations for the protection of these resources.

1. Natural Resource Protection:

a. Minimize ground disturbance to the greatest extent possible.

b. The Contractor shall not remove, cut, deface, injure, or destroy resources including trees, shrubs, vines, grasses, topsoil, and landforms without approval.

No ropes, cables, or guys shall be fastened to or attached to any trees for anchorage unless specifically authorized.

i. Pruning or removal of vegetation shall be supervised by Park POC.

c. If required for access, removal of trees will be performed by the NPS in advance of Contractor's work. Should it be determined during the course of work that additional trees require removal, Contractor shall notify the Park POC who will coordinate an inspection and determination by the appropriate authorities whether to remove the tree or not.

d. Minimize disturbance to tree trunks and root zones to prevent damage to trees.

e. Do not drive trucks where they will disturb vegetation, including meadows and tree root zones. Do not drive over root zones unless work cannot otherwise be reasonably done. Driving over roots will compact the soil and can harm or destroy the tree. If unavoidable, use protective measures, like mats or plywood to prevent soil compaction. Use long hoses as required.

f. Do not cut wheels or make sharp turns with wheeled or tracked equipment in root zones.

g. Do not compact soil around roots to a greater degree than surrounding undisturbed soil.

h. Contractor shall setup operations within improved roadways, access roads or walkways whenever possible. Access to manholes within natural areas shall be approved by the Park POC prior to mobilization to the site. Access off road may require the use of plywood planking placed under all tires consisting of a minimum 2-foot by 8-foot sheets, 1-1/8” thick, placed one layer thick or two (2) each, minimum 2-foot by 8-foot sheets, 5/8” thick, placed two layers thick. Larger sheets may be required if vehicle is unable to stay on top of plywood. Aluminum, portable aircraft landing mats may be used in lieu of plywood. Planking shall be fully removed following vehicle passage and shall in no case be left in place more than 48 hours. High flotation all-terrain vehicles with the camera setup may be used in lieu of planking if approved by the Park POC.

2. Plant Damage Appraisal:

a. When authorized and supervised by the Park POC, the Contractor may be exempted from any penalties that might be assessed due to damage to vegetation.

b. If the Contractor destroys or injures trees and vegetation designated for protection or outside the work limits, the Contractor may be assessed damages.

NPS Law Enforcement Staff shall make the determination if Resource Protection laws have been violated.

c. Replacement costs for damaged vegetation will be computed according to the method described in the International Society of Arborculture's 1992 Guide for Plant Appraisal. This method is based on the cost of the largest commonly available tree or shrub, with modifications based on species value, condition, and location. A trained arborist or professional plant appraiser from the state’s region will be hired by the NPS to make the damage appraisal. The arborist's fees will be included in the damage assessment.

d. This damage appraisal process will be triggered by any of the following types of damage to vegetation outside the work limits or unauthorized disturbance of vegetation within the work limits.

i. Removal of any tree or shrub.

ii. Pruning or removal of more than 30 percent of a tree or shrub canopy.

iii. Removal or fracture of any limb or trunk that is one of the major structural entities of the damaged plant.

iv. Removal or fracture of any limb greater than 12 inches in diameter.

v. Bark damage or removal around more than 30 percent of the trunk circumference.

e. If the damaged vegetation is protected under the Endangered Species Act or other special legislation, additional penalties may be assessed as per consultation with the U.S. Fish & Wildlife Service.

3. Protection from Exotic Species:

a. Measures shall be taken to prevent the introduction of exotic species in the project area and/or other areas within the boundaries of the NPS site. All vehicles and equipment must enter the NPS area free of dirt, dust, mud, seeds, or other potential contaminants. Vehicles will be inspected at a mutually agreed site by the Park POC and Contractor prior to entering the Park. Vehicles and equipment exhibiting any dirt or other material attached to frame, tires, wheels, or other parts shall be thoroughly cleaned by the Contractor before entering the NPS area.

All construction or service related vehicles and equipment that operate off road, in a project area containing known high priority exotic plants will be pressure-washed on site prior to leaving the work site. Equipment found to have entered the NPS area with potential contaminants will be removed from the site at the direction of the Park POC at Contractor's sole expense. The Park POC will maintain a list of cleaned and approved vehicles and equipment for the duration of the project.

Appendix A: Sewage Spill Prevention and Response Plan Outline

1.0 Project Overview

1.1 Project Description

1.2 Contractor Responsibilities

2.0 Spill Prevention Plan

2.1 Spill Prevention Analysis

2.2 Spill Containment System

2.3 Spill Prevention Procedures During Construction Operations

2.4 Bypass Plan

2.4.1 Spill Prevention Procedures During Bypass Operations

2.4.2 Materials

2.4.3 Initial installation steps for sewage bypass

2.4.4 Operation of the Bypass System

3.0 Spill Response Plan

3.1 Overview

3.2 Initial Actions in the Event of a Sewage Spill

3.3 Notification Procedure in the Event of a Sewage Spill

3.4 Spill Clean-up

3.5 Post-spill Debriefing and Documentation Procedures

3.5.1 Spill Reporting Procedure

4.0 Training of Contractor Security and Operations Personnel in Spill Prevention and Response

4.1 Scope of Training

4.2 Frequency of Training

4.3 Documentation of Training

5.0 Contractor Management Approval Statement

Appendix A: Spill Prevention Analysis Forms

Appendix B: Spill Containment and Bypass System Components

Appendix C: Training Summary Form

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SECTION 01785—Deliverables

PART 1: GENERAL

1.1 Description

The work of this section consists of furnishing draft review copies and all final deliverables in electronic and hard copy formats. Electronic versions shall be in the same file format as the original document in which it was created and, where specified, in Adobe® Portable Document File (pdf) format.

1.2 Submittals

A. Submit a draft CCTV Inspection Report and a single DVD with a representative sample of the video inspection files to the NPS Project Manager (COTR). See Section 3.2.E below.

B. Submit final deliverables as per requirements contained in this section and/or other technical specifications sections that are a part of this contract.

C. Final submittals will be sent to various locations. The COTR will provide addresses for shipping.

1.3 Schedule

A. At start of project, begin accumulating final submittal data and initiate an index. Install and index all data in binders as work progresses. As custom written data and test results are produced, add them to the file. Compile a minimum of one hard copy file set within 20 calendar days after completion of field work and submit one draft review manual to NPS Project Manager for review while data entry process is in progress.

B. Keep data current. Make binders available to the Park POC for inspection at the time of monthly progress payment requests. If binders are not current the Park POC may request of the COTR to retain an appropriate amount of the progress payment.

C. Within 30 calendar days following receipt of review comments from NPS Project Manager, deliver two (2) completed hard copy sets and two (2) electronic versions on DVD and USB

2.0 (or higher) Portable Hard Drives. Flash or thumb drives are not acceptable unless specifically approved by the COTR.

PART 2: PRODUCTS

2.1 Binders

A. White, commercial quality, hard back, three-ring, 2-inch maximum ring size (3-inch on approval), lever-locking type with clear window pockets on front and side. Cardinal binder manufactured by Cardinal Brands, Inc., Georgetown, KY or equal.

2.2 Index System

A. Index sheet with mylar reinforced edges at binder holes and tabbed divider sheets with mylar reinforced edges and pre-printed numbered tabs aligned with numbers and title lines on index sheet. Cardinal One-Step, manufactured by Atapco Office Products Group, St. Louis, Missouri; Avery Ready Index, manufactured by Avery Dennison, Covina, California; or equal.

PART 3: EXECUTION

3.1 Electronic Database Records

A. Contractor shall prepare and maintain an electronic database of the inspection records and provide two (2) copies to the NPS upon completion of the work.

1. Two complete electronic copies of the CCTV inspections. One copy shall be on a single portable, external hard drive and the second on Digital Video Disks (DVD). Both shall be searchable and shall include an index to easily find the desired pipeline segment inspection. The Contractor shall provide one file for each manhole to manhole segment of the CCTV inspection. Each file shall be named and indexed to a data base of manhole/pipeline identifiers. Organization and naming of electronic files shall be approved by the Park POC and/or NPS Project Manager. Video shall be capable of running on any standard PC with MS Windows® operating systems and be compatible with Microsoft Office® software. Instructions for operating the CCTV inspection software and for accessing specific locations within the software are to be included.

Any specific or proprietary software necessary to view and manage the data shall be provided at no additional cost to the Government.

2. A Table of Contents shall be provided listing the geographic or developed area name.

If the pipe segment reports are arranged by segment number, there shall be a cross reference included that is arranged alpha/numerically by upstream manholes and another cross reference arranged alpha/numerically by downstream manhole number. These cross-referenced Tables of Contents shall be included in each copy of the manual(s).

3. Digital Video Disks are to have labels that clearly identify what is included on each disk. Include sub-contractor name and date of inspection. Number disks consecutively and name by geographic area.

4. USB 2.0 (or higher) powered Portable Hard Drives shall of a size suitable for the amount of data stored. Flash or thumb drives are not an acceptable device for delivery of the data unless specifically approved by the COTR.

5. Files shall be provided in the camera equipment original source file format, Microsoft Office® format and Adobe® Portable Document File (pdf) format.

3.2 Inspection Data Manuals

A. Provide two (2) complete sets of inspection and test data as 8.5” x 11” hard-copies, bound in three ring binders

1. Content

a. Inspection Data Sheets: For each pipe segment inspected, provide a Pipeline

Inspection Report as generated by the camera inspection software. For each manhole inspected, provide a Manhole Inspection Report as generated by the same camera software.

i. CCTV Inspection Reports shall be compiled in alpha/numeric order, placed in high quality three ring binders, and submitted in duplicate to the NPS upon completion of the work. Only submit original, color reports, one segment per page. Inspection reports shall include the Pipeline Inspection Report Form and printed hard copy still image photographic records for each unusual condition and other pertinent defects. Photographic records shall be high contrast color computer generated original prints; four photos per sheet maximum, thumbnail sized photos are not acceptable.

Proper labels shall easily identify the pictures. Photos shall be approximately 3”x3.5” each, maximum 4 per page.

ii. Manhole Inspection Reports shall be compiled in alpha/numeric order, placed in the Inspection Data Manuals following the pipeline inspection reports. Manhole Inspection Reports shall include the Manhole Inspection Report Form, printed hard copy of each manhole photographic record and printed hard copy of photographic records for each unusual condition and other pertinent defect. Photographic records shall be high contrast color computer generated original prints, one manhole per sheet and four photos per sheet maximum, thumbnail sized photos are not acceptable.

Proper labels shall easily identify the pictures. Photos shall be approximately 3.5’x5” each, 4 per page.

b. Photographs: Provide photos of immediate hazards, unusual conditions and pertinent defects for pipelines. Provide manhole structure photos and immediate hazards, unusual conditions and pertinent defects. Include still photos taken during the inspection, maximum 4 photos per page. The 4 photos shall fill the page; photos shall be included with their respective pipe segment or manhole inspection report, bound in the 3 ring binder(s) and arranged logically according to the asset number and by system layout. Include maps of the systems in the report. Further arrangement shall have the pipe segments reports in one section and all manhole inspection reports section arranged numerically following the pipe segment section. Dividers shall mark individual geographic area reports and other logical divisions within the report.

c. Record Drawing: Provide related sheet for each geographic area inspected.

d. Test Results: Include the test results for tests conducted on force mains and air release valves.

e. Prime Contractor: List the Prime Contractor who worked on the project. Include address and telephone number and job number.

f. Subcontractor: List all subcontractors who worked on the project. Include address and telephone number and identify the work performed. Include their job number.

B. Submit one draft mockup of the inspection report to the COTR prior to finishing the report.

Either an electronic version or a hard copy of the mockup is acceptable but must represent the exact layout of the final submittal and be representative of each paragraph, page and section required for this submittal. In essence, a “mini-final” report shall be submitted for approval. A complete copy of the proposed final submittal is not required for the draft version. The contractor shall incorporate any comments on the draft in the final version.

The single DVD shall be a direct copy of the proposed final electronic video inspection files.

The DVD files are to meet requirements of this and the other sections of this contract.

C. Final CCTV and Manhole Inspection Data Manuals shall be organized as follows:

1. A Table of Contents shall be provided listing the geographic or developed area name. If the pipe segment reports are arranged by segment number, there shall be a cross reference included that is arranged alpha/numerically by upstream manholes and another cross reference arranged alpha/numerically by downstream manhole number. These cross referenced Tables of Contents shall be included in each copy of the manual(s).

2. The report is to be grouped by geographic or developed area names (i.e. Loft Mountain Campground, El Portal Rancheria Housing, Fall River Pass)

3. An 11”x17” map sheet shall be included with each geographic or developed area section which shows line segments and manhole numbers. The map need only show the particular lines included in each section of the binder (i.e., lines “A”, “B”, “C” etc.). If the geographic area is too large to clearly show all labels for lines and manholes inspected on an 11”x17” sheet, the area shall be divided in a logical order and submitted with multiple map sheets depicting the areas.

4. Line segment reports shall be grouped within the geographic areas, and each line segment shall be arranged in alpha/numeric order (i.e. segment A1-A2, A2-A3, B1-B2, B2-B3, etc.)

5. Each line segment; Pre-cleaning CCTV Inspection Report, Cleaning Report and Final CCTV Inspection Report shall be placed together.

6. Photographic records of defects shall be placed immediately following the corresponding line segment report.

7. Manhole assessment reports shall be included within the geographic/developed area section of the manual. Manhole reports shall be tabbed and grouped by line (i.e. “A” line, “B” Line, etc.).

Manhole reports shall be organized sequentially along their respective sewer line and shall be placed in the manuals following the line inspection and photographic reports section.

8. Manhole photographic records shall be placed immediately following the related manhole inspection report.

9. Results from force main and any air release valves testing shall be tabbed and included following the pipeline and manhole reports.

10. Prime Contractor’s name, address, telephone number and any sub-contractor’s names, addresses, telephone numbers shall be placed last in the manual.

D. Number multiple binder volumes consecutively.

E. Cover Sheet: Identify the project title, location, park, contract number and award date, prime contractor's name and address, sub-contractor's name and address, date of substantial completion, and binder volume number. Insert cover sheet into clear plastic view pocket on front of binder. Insert sheet with NPS site name and relevant task name into side clear plastic view pocket.

F. Index System: Organize data into sections by common subjects and subsystems. Place a consecutively numbered tabbed divider sheet in front of each section. Place index sheet at the beginning of each binder, listing sections by subject name. If multiple binders are used, place a table of contents of all data provided behind the index sheet in each binder.

G. Data: Fill binders to no more than 75 percent of capacity. Punch holes shall not obscure any data. Normal sheet size shall be 8 ½ inches by 11 inches. Fold oversize sheets to 8½ inches by 11 inches.

H. Provide color originals for pipe segment reports. Black and white data may be originals or clean, good quality reproductions. Where originals are printed on both sides of the page, reproductions shall also be printed on both sides of the page. Copies produced by facsimile transmission and sheets with stamps, such as submittal approval stamps, will not be acceptable. Include only sheets that apply to work of this contract.

1. Record Drawings: Maximum 11-inch by 17-inch sheets with minimum character or lettering size of 1/8-inch folded to 8 ½ inches by 11 inches.

2. Custom Written Data: Typewritten text and data, supplemented by drawings and schematics as necessary to describe system(s) adequately.

3. Data that is poorly reproduced or in any way illegible will be rejected I. Record Drawings depicting any field observations as to location, identification, numbering, or other useful information shall be submitted at the completion of the work. Record Drawings shall be the maps produced either by others under a separate contract or through this contract with observations clearly marked by hand in RED INK. Contractor shall submit one (1) copy of the Record Drawings.

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

SECTION 02501—Testing of Sewer Force, Mains, and Appurtenances

PART 1: GENERAL

1.1 Description

A. The work of this section consists of low pressure air testing of wastewater force mains, 2” diameter and larger and appurtenances for the sole purpose of documenting deficiencies in the NPS Facility Management Software System database. It is not intended to be used as a test for new pipe installation acceptance.

B. This procedure shall be used if the force main has not been or cannot be drained and/or access points are not available making a conventional internal camera inspection impossible. This guideline is to provide general procedures for testing of air release valves and low pressure air testing of wastewater force mains.

C. If it is determined by the Contractor and NPS that the force main cannot be shut down for enough time to perform the low-pressure air tests, the Contractor shall only perform the tests/checks on the air release valves and shall document any physical conditions present that may affect the performance of the force main system.

D. The Contractor shall furnish all equipment and personnel for conducting the tests under the observation of the NPS Project Manager, Park POC and/or the Utility System Operator (herein referred to as NPS). The procedures and equipment shall be subject to the approval of the NPS.

E. Testing Methods: Low pressure air testing and general observations. See Part 3.

1.2 Quality Assurance

A. This procedure shall be modified if any part of it presents a condition where a sewage spill could occur or damage to the lift station and/or force main could occur.

B. Air test gauges shall have minimum divisions of 0.10 psi and have an accuracy of 0.0625 psi (one ounce per square inch). Gauges shall be ANSI B40.1-80, Grade 3A (plus or minus 0.25 percent of full scale accuracy), with a 15 psi dial range.

C. All air used shall pass through a single control panel.

1.3 Submittals

A. Before testing, provide the following information:

1. Provide documentation of existing conditions. See Part 1.4C below.

2. All Tests: Describe precautions that will be taken to protect system equipment that might be damaged under test pressures.

1.4 Project Conditions

A. The Contractor and NPS Utility System Operator or other Park personnel in charge shall determine and agree that conditions are suitable for low pressure air testing prior to performing the test.

B. Document all existing conditions prior to the start of the testing. Documentation shall include, but not be limited to, positions of valves (open/closed), utility vaults that show water infiltration, status of pump controls, etc. At the completion of the testing, all valves, equipment and controls are to be returned to their original position unless specifically directed not to by the NPS. Document any changes to the original settings when returning the system to normal operation after the testing.

C. To accomplish any of the testing protocols, it must be possible for NPS to temporarily take the force main system out of service. The time required to complete the testing as outlined cannot be determined prior to testing and will vary considerably from system to system.

Perform tests at low use time in coordination with NPS. A temporary suspension of the testing may be required due to high volume of inflow. The contractor shall insure the capability to place the system back into normal operating mode if inflow is too great to keep the system out of service for the complete testing duration.

D. At all steps of testing the NPS has the authority to approve or disapprove the exercising of a valve or other element on the system and the Contractor must explicitly receive the approval of the assigned on-site NPS contact before exercising any such elements. If disapproval of operating any of these elements precludes additional testing the contractor will cease testing operations and place the system back into service. Contractor shall document any decision to not move forward with the testing procedures.

1.5 Safety

A. Pneumatic Plugs

1. The pneumatic plugs must be firmly secured and care should be exercised in their removal. The total force on a 12" plug at 4.0 psi is over 450 pounds. Care must be exercised in not loading the sewer line with the full pressure of the compressor.

B. Confined Space:

1. Only trained and certified personnel shall be allowed to enter confined space locations. All confined space requirements are to be observed.

C. Traffic Control:

1. Personnel on-site shall have adequate traffic control measures in place. Hard hats and safety vests are required to be worn by all personnel in attendance.

PART 3: EXECUTION

3.1 General

A. Perform testing in the presence of the NPS. Notify the NPS Point of Contact at least 48 hours prior to testing.

B. Protect system equipment susceptible to damage by test pressures. Return services to full operation when required.

3.2 Air Release Valves (ARV)

A. Test air release valves first. Air release valves are typically located a long distance from the lift station pumps and/or discharge outlet of the force main. It is not possible to test their performance by pressurizing the pipeline from the discharge end as the air must travel to the high point to be vented by the ARV. Two tests can be performed to determine functionality of the valves.

B. All water and/or debris that have accumulated in ARV utility vaults shall be removed prior to the start of the testing.

C. Perform tests in coordination with the lift station wet well pump down process for the force main low pressure air test.

1. ARV Test 1: Verify the inlet valve between the force main and the ARV is open.

Observe the ARV when the force main is pressurized under normal operating conditions. Perform this test in conjunction with pumping down the lift station wet well for the low-pressure air test if possible. If liquids are forced out of the ARV, it is assumed to be plugged and will require maintenance.

2. ARV Test 2: Perform this test when the force main is in a static condition. Close the inlet valve between the force main and the ARV. Open the blow-off valve (near bottom of ARV) and observe … if fluid drains out the valve body rapidly, flushing is not required and the valve is assumed to be operating properly. Should fluids not drain rapidly or at all, the valve must be flushed in accordance with the manufacturer’s recommendations. The contractor is to document the need for the maintenance and is not to perform the task.

3.3 Low Pressure Air Test

A. Test force main with low pressure air. Safety requires a regulator or relief valve on pressurizing equipment, set at 8 psig. No one will be allowed in manholes while there is air pressure against test plugs.

1. In coordination with the NPS, pump down the lift station wet well to the lowest level possible. Plug all inflow lines to maintain a constant level in the wet well while the system is shut down. Measure the depth from point on rim to fluid level accurately.

a. If the lift station and force main have been out of service for an extended period of time, water shall be introduced to completely fill the line prior to the air test.

b. All air/vacuum relief valves shall be closed prior to the start of the test.

2. Simultaneously, plug discharge end of force main pipe with a pneumatic plug equipped with a flow through air fitting capable of pressurizing the sewer line. The plug shall have remote air hose/gauge/rope combinations suitable for the testing purposes described herein. Make every effort to avoid entering the manhole to install the plug.

3. The pipe shall be tested with low pressure air. Air shall be slowly supplied to the plugged pipe installation until the internal air pressure reaches 4.0 pounds per square inch. DO NOT EXCEED 9 PSI

4. At least five minutes shall be allowed for temperature stabilization before proceeding further. After the five-minute temperature stabilization period, re-pressurize to the

4.0 pounds per square inch. Disconnect the air supply.

5. The line being tested shall be termed “Acceptable” if the time required in minutes for the pressure to decrease one (1) psig is not less than the time shown for the given diameters in the following table:

Pipe Diameter Minutes* 2” ……………………1.0 3” ……………………1.5 4” ……………………2.0 6” ……………………3.0 8” ……………………4.0

10” ……………………5.0 12” ……………………5.5 15” ……………………7.5 18” ……………………8.5

21” ……………………10.0 24” ……………………11.5

*Time in Minutes = 0.472 D D = Diameter of pipe in inches

When a combination of more than one pipe size is under test, the calculated time for the larger pipe shall apply.

6. If the pipe fails to meet these requirements, the first location to investigate is the performance of the check valves. If bubbles are observed in the wet well and they originate below the pump(s) or the wet well level rises, the assumption is the check valves are leaking or the internal pipe is deteriorated. At this point the Contractor shall close the gate valve(s) immediately downstream of the check valves. Repeat the test.

If the pipe meets acceptability requirements, the assumption is the check valves are leaking.

7. If the pipe continues to fail to meet the acceptable requirements, the Contractor shall begin to isolate the different sections of the pipe. Working from the lift station towards the force main discharge end, close the first isolation valve downstream of the gate valves at the lift station and repeat the test. If the test is acceptable, the leak is assumed to be between the lift station gate valves and the first downstream isolation gate valve. If the test is unacceptable, open the first isolation valve and close the second isolation valve downstream of the lift station. Repeat the test. Continue this procedure until the leak location is determined

8. Document each step in detail as progress is made towards a complete test.

9. Return the system to normal operating conditions at the completion of testing.

The National Park Service cares for special places saved by the American people so that all may experience our heritage.

SECTION 02531—Sewer Line Cleaning

PART 1: GENERAL

1.1 Project Summary

A. Contractor shall perform a complete closed circuit television (CCTV) inspection of all sewer lines 4” and larger. The work includes a pre-cleaning CCTV inspection to document conditions that could be removed during cleaning; hydro-cleaning of the lines when necessary and follow up with a post-cleaning CCTV inspection. The CCTV documentation will be completed in accordance with the National Association of Sewer Service Companies (NASSCO) standards for pipeline and manhole condition assessments (PACP® and MACP®).

Manholes will be inspected and their condition documented through completion of the database entries and still photos. Work also includes testing of force mains and appurtenances. Final documentation will include submittal of multiple copies of printed pipe segment inspection reports, the electronic database, written reports of force main test results and the digital video inspections.

B. Pre-cleaning CCTV: The pre-cleaning CCTV video inspection of all sewer lines 4” and larger includes all main lines, branch lines and laterals. The pre-cleaning video will document all defects that could be easily removed by high pressure hydro cleaning methods. If determined the line does not need cleaning, only one video will be performed that will document all defects, conditions and changes in materials. The pre-cleaning video will become part of the permanent record and defects found during that inspection will be included in the electronic database. The pre-cleaning CCTV digital files will be submitted to the NPS as part of the final deliverables.

C. Cleaning: If the sewer line requires cleaning, the line shall be cleaned by high pressure hydro- flushing and/or hydro-vacuuming following the pre-cleaning CCTV documentation.

All debris shall be caught and removed from each downstream manhole and shall not be transported from manhole to manhole by the hydro-flushing method. Numerous passes with the cleaning equipment may be required to get an accurate view of the pipeline condition. See Sections 1.6.D and 1.6.E for requirements for cleaning of siphon lines.

D. Post-cleaning CCTV: Following cleaning, the line shall be video taped again to document all defects relating to the structure and condition of the line and changes in materials.

Documentation shall include digital video with verbal descriptions of each defect or changes in conditions and/or materials on the video, still photos of defects, printed copy of the reports of all segments inspected and electronic data files.

E. Manhole Inspections: Manholes will be visually inspected and their construction specifications documented as per the MACP® standards. The manhole conditions will be documented in the electronic database. Digital still photos will be taken, added to the database and included with the final deliverables. Include a drawn graphic of the manhole invert showing all the influent and effluent lines. Graphic shall be in the same orientation as the photo of the invert.

F. Force main testing / inspection: Force mains will be pressure tested using low pressure testing methods. Testing may involve multiple efforts to determine locations of defects.

Results will be documented and included with final deliverables. See Section 02501.

1.2 Submittals

A. Submit for approval the following, prior to the start of the work:

1. Written procedure for cleaning and debris removal: Include descriptions of equipment to be used including types of heads, pressure ratings, flow volumes, and condition (new, slightly used, used). Describe vacuum/jetting equipment specifications.

2. The contractor shall submit a proposed sample of the weekly cleaning log in accordance with Section 1.14.B of this document. Approval of the NPS Project Manager is required prior to work starting.

3. Record Drawings: Contractor shall provide contract maps marked up according to conditions found during cleaning operations at the completion of the work. Record Drawings shall have critical observations clearly marked by hand in RED INK. See paragraph 1.14C below.

1.3 Closed Circuit Television (CCTV) Inspection Schedule

A. The Contractor shall complete CCTV inspection per Section 02534 immediately following cleaning to allow clear viewing of the sewer pipeline condition by the camera. A cleaned pipe reach shall be CCTV inspected within 24 hours elapsed time of being cleaned. The pipeline reach shall be re-cleaned if solids obstruct the camera view and re-cleaning shall be at no additional cost to the Government.

1.4 Manhole Closure

A. All existing manholes should be equipped with a solid well fitting cast iron cover with no drain or through-pick holes and may include a PVC infiltration lid beneath the cast iron cover. The Contractor shall reinstall any infiltration lids and cover following cleaning.

1.5 Bypass Conditions Assessment

A. Contractor shall assess each pipeline segment for bypass pumping needs. The assessment shall include: Identification of possible spill flow paths to a water course such as streams or rivers, developing a site specific Spill Prevention and Response Plan, and providing bypass equipment if needed, sand bags and other spill prevention and response equipment and materials prior to proceeding with the work. The site specific Spill Prevention and Response Plan shall be approved by the Park Point of Contact (POC) and NPS Project Manager prior to proceeding with the work. Reference Section 01355 for SPRP requirements

B. Equipment and materials shall be available as identified in the site specific Spill Prevention and Response Plan. In addition, equipment and material shall be standing by and ready within 30 minutes in the event of a spill.

1.6 Pressurized and Surcharged Gravity Line Cleaning

A. Contractor shall inspect all pressure cleanout locations and air release valves and develop a site specific spill prevention plan associated with opening the cleanout for cleaning.

These cleanouts are generally on steep pipelines and are subject to pressures during blockages or surcharge conditions. Any compromised, damaged or unsound cleanout, cleanout pipe, cleanout lid and cover shall be reported immediately to the Government with a recommendation for repair.

B. Contractor shall coordinate the cleaning schedule of these pipelines and the work may involve working either prior to or after the peak visitation hours or possibly peak visitation seasons to reduce flows in the pipeline.

C. Situations may exist where it is neither safe, nor feasible to inspect a line. The contractor shall document the situation and proceed to the next area.

D. Siphon lines shall be cleaned provided access exists to either the inlet or outlet end of the line. Siphons less than 10” in diameter shall be cleaned without a pre-inspection report being generated. These lines shall require a minimum of 2 passes with cleaning equipment but may require more should debris still be encountered. The weekly cleaning log shall clearly show the number of passes made with the cleaning equipment and an estimation of the volume of sedimentation encountered if any. Details shall be very specific when documenting the cleaning of any surcharged lines.

E. Siphons 10” and larger shall be inspected prior to cleaning with sonar equipment to determine the amount of debris that may be present in the line. Following sonar assessment and documentation of the debris quantity, the line(s) shall be cleaned with the number of passes necessary to ensure a clean pipe. Cleaning shall be with a high pressure water jetting head only. No mechanical cleaning or root cutting is permitted. Extreme care shall be taken to prevent lodging of the cleaning nozzle in the pipe or in a dosing siphon trap. Reference Section 02534 for sonar assessment requirements

1.7 Pressurized Force Main Cleaning

A. See Specification Section 02501.

B. Not all force mains are suitable for cleaning. Many force mains only have access points at either end. Access points along the length of the force main may not exist. Coordination with the Park POC and utility system operators is required prior to any operation that involves force mains.

C. Contractor shall inspect all pressure cleanout locations and air release valves and develop site specific spill prevention plans associated with opening the cleanout for cleaning.

These cleanouts are subject to pressures during routine operations as well as static conditions. Any compromised, damaged or unsound cleanout, cleanout lid and cover shall be reported immediately to the Park POC with a recommendation for repair.

D. Contractor shall coordinate the cleaning schedule of these pipelines and the work may involve working either prior to or after the peak visitation hours or possibly peak visitation seasons to reduce flows in the pipeline.

1.8 Minimum Equipment Onsite

A. Contractor shall maintain an adequate supply of backup equipment and parts at all times.

Work locations are such that ready access to repair parts is very limited and may require several hours of travel time. Time lost due to equipment breakdown and/or lack of repair parts will not be chargeable to the Government.

1.9 Flow Control Without Bypass Pumping

A. Divert sewage flows and storm water around all sewer cleaning areas as needed. Depth of flow shall be limited to less than 1/3 of the diameter of the pipe. If flow is greater than 1/3 the diameter of the pipe, the video work shall be postponed for more favorable conditions or non-pumping flow control methods may be employed. Furnish, install, and manage plugs, conduits, and other equipment to lessen or divert the flow of sewage through or around the pipeline reach in which work is to be performed. Pneumatic plugs shall be designed so that all or any portion of the sewage can be released to the original line without requiring personnel to enter a manhole.