AMD03 21R1321.pdf

1641226

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

N62742-21-R-1321, J-034 Bachelor Officer Quarters-B, US NAVSUPPACT MCB, GUAM

See Next Page

1. CONTRACT ID CODE PAGE OF PAGES

J 1 3

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 22-Nov-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X N6274221R1321

X 9B. DATED (SEE ITEM 11)

08-Jun-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer is extended, X is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

22-Nov-2021

CODE

NAVFAC PACIFIC

CONSTRUCTION CONTRACTS BR (CODE ACQ33)

258 MAKALAPA DR STE 100

PEARL HARBOR HI 96860-3134

N62742 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

N6274221R1321

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

This amendment is issued to:

1. DOCUMENT 00700 is revised as follows:

a. Clause 1.67 FAR 52.222-55, Minimum Wages Under Executive Order 13658 (NOV 2020) and to replace it with “Not Used.”

b. Add the following clause:

1.184 DFARS 252.223-7999 Ensuring Adequate COVID-19 Safety Protocols for Federal Contractors (Deviation

2021-O0009) (OCT 2021)

(a) Definition. As used in this clause –

United States or its outlying areas means—

(1) The fifty States;

(2) The District of Columbia;

(3) The commonwealths of Puerto Rico and the Northern Mariana Islands;

(4) The territories of American Samoa, Guam, and the United States Virgin Islands; and

(5) The minor outlying islands of Baker Island, Howland Island, Jarvis Island, Johnston Atoll, Kingman Reef, Midway Islands, Navassa Island, Palmyra Atoll, and Wake Atoll.

(b) Authority. This clause implements Executive Order 14042, Ensuring Adequate COVID Safety Protocols for Federal Contractors, dated September 9, 2021 (published in the Federal Register on September 14, 2021, 86 FR 50985).

(c) Compliance. The Contractor shall comply with all guidance, including guidance conveyed through Frequently Asked Questions, as amended during the performance of this contract, for contractor or subcontractor workplace locations published by the Safer Federal Workforce Task Force (Task Force Guidance) at https:/www.saferfederalworkforce.gov/contractors/.

(d) Subcontracts. The Contractor shall include the substance of this clause, including this paragraph (d), in subcontracts at any tier that exceed the simplified acquisition threshold, as defined in Federal Acquisition Regulation 2.101 on the date of subcontract award, and are for services, including construction, performed in whole or in part within the United States or its outlying areas.

(end of clause)

2. Delete Section 32 16 15 CONCRETE BLOCK PAVEMENTS from the Project Table of Contents.

3. Section 08 71 00 Door Hardware is revised as follows:

a. Para 3.5 Hardware Sets is revised to delete the 1st sentence in its entirety and to replace it with the following:

Provide hardware for all doors under this section.

b. Hardware Sets is revised to add the following after Set: 27.0:

Set: 28.0

3 Hinge (A5111 NRP) TA2314 NRP 4-1/2" x 4-1/2" US32D MK

1 Fail Secure Lock RX 64 8271-XXV LNL US32D SA

N6274221R1321

1 Core (LFIC 6Pin) 6300 US15 SA

1 Surface Closer (CO2021) CPS7500 600 689 NO

1 Threshold (A156.21) 2005AT WIDTH PE

1 Rain Guard (A156.22) 346C WIDTH PE

1 Gasketing (A156.22) S88BL 1WIDTH x 2HEIGHT PE

1 Sweep (with rain guard) (A156.22) 345AV WIDTH PE

4. Section 31 21 13 RADON MITIGATION, is deleted in its entirety and replaced with the attached Section 31 21

13 RADON MITIGATION.

5. Section 31 23 00.00 20 EXCAVATION AND FILL, is revised as follows:

a. Paragraph 2.2, POROUS FILL FOR CAPILLARY WATER BARRIER is deleted in its entirety and replaced with the following:

ASTM C33/C33M fine aggregate grading with a maximum of 3 percent by weight passing ASTM D1140, 75 micrometers sieve, or coarse aggregate Size 67 and conforming to the general soil material requirement specified in paragraph entitled “Satisfactory Materials.”

b. Paragraph 3.3.1, Structures With Spread Footings, 1st sentence is deleted in its entirety and replaced with the following:

Over excavate below spread footings minimum 600 mm and backfill with select material in 150 mm lifts compacted to 95 percent of ASTM D1557 maximum density.

6. Section 32 16 15 CONCRETE BLOCK PAVEMENTS is deleted in its entirety.

7. Revised Drawings: The following previously issued drawings are revised and reissued. These revised drawings supersede any previously issued drawings:

NO.

SHEET

NO.

NAVFAC

NO.

DESCRIPTION

1 CS501 17268324 UPDATED TYPICAL PCC PAVER LANE SECTION

2 A-151 17268415 REVISED DETAIL REFERENCE NUMBER

3 A-152 17268416 REVISED DETAIL REFERENCE NUMBER

4 A-211 17268436 SIGNAGE EDIT

5 IG134 17268501 SIGNAGE EDIT

6 IG142 17268503 SIGNAGE EDIT

7 IG611 17268505 SIGNAGE EDIT

8 IG612 17268506 SIGNAGE EDIT

9 IG613 17268507 SIGNAGE EDIT

10 IG622 17268509 SIGNAGE EDIT

11 E-001 17268615 ADDED NOTE

8. All other terms and conditions remain unchanged.

End of Amendment

J-034 BACHELOR OFFICER QUARTERS-B 1641226

US NAVSUPPACT MCB GUAM

SECTION 31 21 13

RADON MITIGATION

11/18

PART 1 GENERAL

1.1 SUMMARY

Provide all work necessary to reduce and maintain radon concentration levels below 4.0 picoCuries per liter (pCi/L) in various buildings specified herein. Perform mitigation system installation, and perform post-mitigation testing and monitoring for radon.

Radon mitigation system shall be constructed in three (3) main phases:

a. Provide layer of compacted thickness of clean, coarse gravel, to size aggregate, perforated pipes, and soil gas retarder membrane under slabs, seal all slab penetrations, manifold pipes as necessary, connect vent stack pipe and cap, and provide electrical power outlets for future radon mitigation fan installation as described herein.

b. Prior to occupancy, perform initial radon test using radon gas detectors in accordance with EPA 402-R-92-004 and Navy guidelines.

c. If initial radon test identify radon levels below 4.0 pCi/L, document readings in the test report and contact the Contracting Officer for futher direction. Should initial radon tests identify radon levels of

4.0 picocuries liter (pCi/L) or more, provide radon mitigation fan assembly (including fan, controller, disconnect switch, performance monitor) and activate. Once fans are provided and activated, perform a post-mitigation radon test to ensure that radon levels are less than

4.0 pCi/L. Should post-mitigation radon test identify radon levels above 4.0 pCi/L, contact the Contracting Officer for course of action and further direction.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AIR MOVEMENT AND CONTROL ASSOCIATION INTERNATIONAL, INC. (AMCA)

AMCA 210 (2016) Laboratory Methods of Testing Fans for Aerodynamic Performance Rating

ASTM INTERNATIONAL (ASTM)

ASTM C920 (2018) Standard Specification for Elastomeric Joint Sealants

ASTM D1785 (2015; E 2018) Standard Specification for Poly(Vinyl Chloride) (PVC), Plastic Pipe, Schedules 40, 80, and 120

SECTION 31 21 13 Page 3

AMD-0003

ASTM D2235 (2004; R 2016) Standard Specification for Solvent Cement for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe and Fittings

ASTM D2282 (2005)Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Plastic Pipe (Withdrawn 2007)

ASTM D2466 (2017) Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

ASTM D2564 (2012) Standard Specification for Solvent Cements for Poly(Vinyl Chloride) (PVC) Plastic Piping Systems

ASTM D2661 (2014; E 2018) Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40, Plastic Drain, Waste, and Vent Pipe and Fittings

ASTM D2729 (2017) Standard Specification for Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings

ASTM D2751 (2005) Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe and Fittings

ASTM El465-08 The Standard EPA Recommends for Radon-Resistant New Construction

ASTM F628 (2012; E 2013; E 2016; E 2018) Standard Specification for Acrylonitrile-Butadiene-Styrene (ABS) Schedule 40 Plastic Drain, Waste, and Vent Pipe with a Cellular Core

ASTM F656 (2010) Primers for Use in Solvent Cement Joints of Poly(Vinyl Chloride) (PVC) Plastic Pipe and Fittings

ASTM F667/F667M (2016) Standard Specification for 3 through 24 in. Corrugated Polyethylene Pipe and Fittings

ASTM F891 (2016) Standard Specification for Coextruded Poly (Vinyl Chloride) (PVC) Plastic Pipe with a Cellular Core

U.S. ENVIRONMENTAL PROTECTION AGENCY (EPA)

EPA 402-R-92-004 (1992) Indoor Radon and Radon Decay Product Measurement Device Protocols

EPA 402-R-93-078 (1993; R 1994) Radon Mitigation Standards

SECTION 31 21 13 Page 4

1.3 DEFINITIONS

1.3.1 Short Term Radon Detectors

Charcoal, electret ion chamber, or approved equivalent. Devices capable of sensing and recording the presences of radon during a time period of 48-hours to 90 days which when analyzed provide a numeric value, measured in pCi/L, for radon concentrations during the time exposed.

1.3.2 Suction Point

Vertical standpipe penetrating into the soil gas environment containing radon and serving as the conduit to exhaust radon gas to the atmosphere.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance with Section 01 33 29 SUSTAINABILITY REPORTING.

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

SD-02 Shop Drawings

Radon Mitigation Systems ; G

SD-03 Product Data

Radon Mitigation Systems Components

SD-06 Test Reports

Radon Testing ; G

SD-07 Certificates

Worker Protection Plan ; G

Contractor Qualifications ; G

Contractor Experience ; G

Testing Laboratory Certification ; G

SD-08 Manufacturer's Instructions

Radon Mitigation Systems Components

SD-10 Operation and Maintenance Data

Radon Mitigation Systems , Data Package 2; G

Submit in accordance with Section 01 78 23 OPERATION AND

MAINTENANCE DATA.

SD-11 Closeout Submittals

Radon Detector Measurements Log ; G

SECTION 31 21 13 Page 5

1.5 RADON DETECTOR MEASUREMENTS LOG

Prepare and provide to the Contracting Officer a Radon Detector Measurement Log for each building with the following information:

a. Start and stop times of measurement;

b. Location of each short term radon detector;

c. Serial number of each short term radon detector;

d. Measurement condition;

e. Radon results; and

f. Quality Assurance/Quality Control (QNQC).

Prepare the log in accordance with EPA 402-R-92-004 , and provide the appropriate information as line items. In addition to the log, on a copy of the building floor plans, locate and identify each short term radon detector.

1.6 WORKER HEALTH AND SAFETY

Provide in accordance with EPA 402-R-93-078 . Prepare a worker protection plan in accordance with EPA 402-R-93-078 .

1.7 QUALITY ASSURANCE

1.7.1 Contractor Qualifications and Experience

Within 15 days after award, submit written evidence or data demonstrating that the Contractor and one or more subcontractors employed by the Contractor possess the qualifications and experience specified below.

1.7.1.1 Contractor Qualifications

The person responsible for construction of the radon mitiation system, on-site supervision, and radon testing, as required by the specifications, shall have successfully completed the requirements of and shall be maintaining a current certification with a recognized proficiency program (e.g. National Environmental Health Association- National Radon Proficiency Program (NEHA-NRPP) or National Radon Safety Board (NRSB)) and shall show documentation of current certification.

1.7.1.2 Contractor Experience

Submit written evidence demonstrating that the Contractor has successfully designed and installed at least two radon mitigation systems of the same or similar to the type required herein. The Contractor must have 3 years of experience installing radon mitigation systems. Experience proof must include but not be limited to:

a. The contract name and number, completion dates of the project and the total cost of the project;

b. The names, telephone numbers and fax number of the facility or installation for whom the radon mitigation system design, construction

SECTION 31 21 13 Page 6 and testing were performed;

c. The name, telephone number and fax number of a supervisory level point of contact at each facility or installation who has knowledge of the Contractor's performance.

1.7.2 Testing Laboratory

Submit testing laboratory certification as proof that the testing laboratory performing radon detector analysis has successfully completed the requirements and is currently approved by a recognized proficiency program (e.g. NEHA-NRPP or NRSB).

1.7.3 On-Site Supervision

No work at the site will be permitted without the presence of a person possessing the following qualifications.

a. NRPP or NRSB certified radon mitigation professional.

b. One year radon mitigation experience.

1.8 DELIVERY, STORAGE AND HANDLING

1.8.1 Delivery of Products

Deliver materials to the site in an undamaged condition. Deliver proprietary items in manufacture's original unopened and undamaged containers of packages with manufacture's name and brand and other pertinent data such as specification number, type, and class, date of manufacture. Schedule deliveries of materials to coincide with scheduled installation.

1.8.2 Storage and Handling

Carefully store materials off the ground to provide proper ventilation, drainage and protection against weather and dampness. Protect materials from marring, staining, rust, damage and overload and from contaminants such as grease, oil and dirt. Store materials at temperatures recommended by the manufacturer. Handle material to avoid damage such as chipping and breaking. Replace damaged material.

1.9 PROJECT CONDITIONS

1.9.1 Building Descriptions

The Bachelor Officer Quarter's Building, is a five story, concrete construction, slab-on grade structure. Concrete slab is approximately thick and the aggregate beneath the concrete slab is approximately thick. Interior partitions are gypsum wallboard on metal studs except where indicated otherwise on the drawings. The roof is flat and covered with single ply rubber membrane. Except for the basement, mechanical rooms and closets, all rooms have suspended acoustical ceilings located approximately below the structural floor or roof above. The building will not be occupied during the contract period. Roof penetrations are not permitted and the south elevation must remain unchanged as a result of the work. Penetrations to the building exterior must be through the roof only. All elevations must remain unchanged as a result of the work.

SECTION 31 21 13 Page 7

PART 2 PRODUCTS

2.1 RADON MITIGATION SYSTEMS

Radon mitigation systems components shall conform to the requirements specified herein.

2.1.1 System Performance

Radon mitigation systems must reduce and maintain radon concentration levels below 4.0 pCi/L after activation of the mitigation systems.

2.1.2 Above Ground Piping and Fittings

a. PVC Piping and Fittings. ASTM D1785; or ASTM D2466; or ASTM D2665; or ASTM F891; Schedule 40. Provide fittings of the same PVC plastic pipe material. Provide solvent cement joints with a primer conforming to Solvent cement for jointing, ASTM D2564.

b. ABS Piping and Fittings. ASTM D2282; ASTM D2661; or ASTM F628;

Schedule 40. Provide pipe and fittings of the same ABS plastic material. Provide solvent cement joints. Solvent cement for jointing, ASTM D2235.

2.1.3 Below Ground Piping and Fittings

a. PVC Piping and Fittings. ASTM D2729; Schedule 40. Provide fittings of the same PVC plastic pipe material. Provide solvent cement joints with a primer conforming to ASTM F656. Solvent cement for jointing, ASTM D2564.

b. ABS Piping and Fittings. ASTM D2751; Schedule 40. Provide pipe and fittings of the same PVC plastic material. Provide solvent cement joints. Solvent cement for jointing, ASTM D2235.

c. PE Piping and Fittings. ASTM F667/F667M ; Schedule 40. Provide fittings of the same ABS plastic pipe material.

2.1.4 In-Line Tubular Centrifugal Fans

AMCA 210 and UL listed. Provide high suction centrifugal fans designed for radon mitigation and capable of continuous operation for five (5) or more years. Fans shall be resistant to temperature extremes and soil-gas moisture fluctuation. The fan shall be able to move at least 37 cfm of air at a static pressure of 2,490 Pa. The fan shall have the following electrical properties; 115 volts, single phase, 60 Hertz.

2.1.5 Radon System Monitors

Radon System Monitors that measure suction pressure (vacuum) in the radon system piping shall be installed and connected to the vent stacks of all fan powered radon mitigation systems. The manometer shall be able to display a minimum vent stack suction pressures from 0 to 2,490 Pa. Radon monitors shall be U-tube style manometer type or magnehelic style differential pressure gauge type of measuring device. Monitors that produce an audible alarm should be avoided. Exterior radon system monitors shall be placed inside an enclosure such as NEMA-4X enclosure or equivalent to protect the monitor from the outside environment and all exterior vacuum tubing and fittings shall be made of copper and/or brass.

SECTION 31 21 13 Page 8

2.1.6 Sealants

ASTM C920, polyurethane, Types, Grade P for horizontal application, Grade NS for vertical application, Class 25, Use T.

2.1.7 Geotextilea

Sub slab soil gas retarder membrane shall be polyethylene sheeting inaccordance with 03 30 00 CAST-IN-PLACE CONCRETE.

2.1.8 Aggregate

Aggregate shall be in accordance with 31 23 00.00 20 EXCAVATION AND FILL.

PART 3 EXECUTION

3.1 RADON MITIGATION SYSTEMS INSTALLATION

3.1.1 Installation

Provide radon mitigation systems as indicated in the approved design drawings, as specified in EPA 402-R-93-078 and as required by the specifications and standards referenced herein for the respective materials using workmen skilled in the trades involved. Install radon system piping and components in accordance with ASTM El465-08 . Coordinate all work with the Contracting Officer.

3.1.1.1 Radon System Piping

Install piping plumb and parallel to existing walls, partitions and ceilings as appropriate, slope horizontal runs to drain, and secure in place in a rigid and substantial manner.Bury perforated pipes in the gas -permeable layer of gravel in a looped configuration with manifold tees as indicated on the drawings to effect coverage under all rooms. Tee assembly shall be positioned so that the suction point pipe which attaches to it penetrates the slab within the plumbing chase where the suction point can be attached to the vent stack. Route the radon systems piping so as not to interfere with the daily operations and functions of the building occupants. All components of radon system piping shall drain their condensed water vapor and collected rain completely to the ground beneath the slab. Keep visibility of the systems to a minimum and ensure that all operating components be accessible for maintenance and repair.

3.1.1.2 Seal Slabs

Seal all gaps/joints and all floor slab penetrations in accordance with ASTM El465-08 and as specified herein. Prevent air leakage into the gas permeable layer and entry of soil gas into the building and exhausting of conditioned air via the the radon mitigation system. Gaps can be filled with polyethylene backer rod or comparable filler material as required and sealed with polyurethane caulk or other elastomeric sealant. Caulks and sealants shall be applied according to manufacturer's instructions.

Ensure that all penetrations to the building exterior are weather-tight.

Coordinate all work with the Contracting Officer.

3.1.1.3 Vent Pipe Stack

Provide electrical power for fan installation in the attic space. Vent

SECTION 31 21 13 Page 9 stack pipes, shall be designed to penetrate through the roof (during construction) and extend at least above the roof (unless otherwise specified) and capped. Ensure that future mitigation fan location will be accessible for maintenance and performance monitor location will be accessible for maintenance and easy monitoring.

3.1.1.3.1 Vent Stack Pipe Discharge Location

The vent stack pipe discharge locations after mitigation fan installation shall be as shown on the drawings.

a. The vent stack pipes shall be vertical and its discharge upward,unobstructed, outside the structure, above the edge of the roof, minimum above the surface of the roof or as indicated, and shall also meet the separation requirements.

b. The end of the vent stack pipe shall be or more away from anywindow, door, or other opening into conditioned or otherwise occupiable spaces of the structure, if the radon discharge is not at least above the top of such openings.

c. Exterior vent stack pipes shall not penetrate the roof. Vent stackpipes located in interior walls shall penetrate through the roof and extend at least above the roof and capped.

3.1.1.4 Radon System Monitor

Install and connect to the vent stacks of each fan-powered radon mitigation system. Exterior radon system monitors shall be placed inside an enclosure such as NEMA-4X enclosure or equivalent to protect the monitor from the outside environment. All monitors shall be visually mounted, approximately above grade, so that the system can be visually checked that it is operating effectively.

3.1.1.5 Mitigation Fan and Disconnect Switch

If radon test results are 4.0 pCi/L or above, provide mitigation fans to achieve radon test results below 4.0 pCi.L. Provide mitigation fans as specified herein and in ASTM El465-08 . Vertical vent stack pipes shall be cut and fan assembly installed such that bottom of the fan should be approximately above grade. Fans shall be installed in a vertical section of the vent stack pipe and in a vertical orientation to prevent condensed water and precipitation from accumulating in the fan. Provide Fan covers to protect the fan from the outside environment and to make the system appear more visually appealing (hides the fan). A disconnect switch shall be provided and mounted adjacent to each fan. The disconnect switch shall be NEMA 4X or equivalent to protect the switch from the outside environment. The switch should be located slightly above each fan to reduce chance of moisture/condensation leakage into switch. Once a radon fan has been installed, it should be turned on and run continuously.

3.1.2 Installation

a. Provide radon mitigation systems as indicated in the approved design drawings, as specified in EPA 402-R-93-078 and as required by the specifications and standards referenced herein for the respective materials using workmen skilled in the trades involved. Install piping plumb and parallel to existing walls, partitions and ceilings as appropriate, slope horizontal runs to drain, and secure in place in

SECTION 31 21 13 Page 10 a rigid and substantial manner.

b. Seal new and existing floor slab penetrations in accordance with EPA 402-R-93-078 and as specified herein. Prevent entry of soil gas into the building and exhausting of conditioned air via the radon mitigation system. Seal cracks and openings around floor slab penetrations with polyurethane sealant. Provide backer rod or comparable filler material as required. Insure that all penetrations to the building exterior are weathertight.

c. Lay work out in advance. Exercise care where cutting, channeling, chasing or drilling floors, walls, partitions, ceilings or other surfaces as necessary for proper installation, support or anchorage.

Patch and repair damage to buildings, piping and equipment using workmen skilled in the trades involved.

d. Coordinate all work with the Contracting Officer.

3.1.3 Supervision

Installation of the radon mitigation systems must be supervised by a person with NRPP or NRSB certification and one year radon mitigation experience.

3.1.4 System Identification

Label all components of the radon mitigation systems including, but not limited to, piping (every 10 feet ), enclosures, fans, electrical conduit (every 10 feet ) and circuit breakers. Labels must read:

Radon Reduction System. Do Not Turn Off.

Public Works Office Phone or as specified by the Contracting Officer.

3.2 RADON MITIGATION SYSTEM ENCLOSURES INSTALLATION

Provide enclosures as indicated in the approved design drawings and as required by the specifications and standards referenced herein for the respective materials using workmen skilled in the trades involved.

Install enclosures plumb, level and parallel to existing walls, partitions and ceilings as appropriate, and secure in place in a rigid and substantial manner.

3.3 FIELD QUALITY CONTROL

3.3.1 Radon Mitigation System Inspection

Each system shall be inspected and approved in writing by the on-site supervisor. Verify the presence of fire stop. Deficiencies shall be corrected by the Contractor at no additional cost to the Government.

3.3.2 Radon Testing

Prior to occupancy, perform short term radon testing, in accordance with NAVRAMP guide lines. All radon test results shall be documented on the Radon Measurement log. A completed radon measurement log shall be submitted to the contracting officer as a closeout submittal. NAVRAMP testing requirements include, but are not limited to the following:

SECTION 31 21 13 Page 11

a. Radon testing shall be conducted after completion of the building,under closed building conditions, and with the HVAC and other mechanical equipment (e.g.. exhaust blowers) operating under normal, occupied conditions.

b. Radon testing shall be conducted by a person holding a current NRPP or NRSB radon testing certification.

c. Contractor shall test all ground contact rooms that could be occupied for 4hrs/day.

d. Radon testing shall utilize radon detectors approved for short-term testing by NAVRAMP.

e. Radon detectors and analysis laboratory must be NRPP or NRSB approved.

f. Follow all Quality Assurance and Quality Control measures required by NAVRAMP (100 percent duplicates, 5 percent spikes, 3 percent blanks).

3.3.2.1 Radon Test Results

If radon test results are 4.0 pCi/L or above, provide mitigation fans as indicated to achieve radon test results below 4.0 pCi/L. If radon test results are below 4.0 pCi/L, document readings in the test report and contact the Contracting Officer for further direction.

3.3.3 Post-Mitigation Testing

After completing and activating the mitigation system, conduct short-term radon testing in the affected rooms in accordance with NAVRAMP. If test results are greater than 4.0 pCi/L, contact the Contracting Officer to seek further direction.

-- End of Section --

SECTION 31 21 13 Page 12

3.3.3 Post-Mitigation Testing