W912BV21R0008_Amendment 0007.pdf

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

Amendment 0007 hereby revises paragraph 5 and 8 of the CLIN schedule notes to reference the correct FAR clauses, 52.211-10 and 52.215-1. This Amendment also revises section 33 46 16, Subdrainiage Piping.

All other terms and conditions remain uncnhanged.

Contract Specialist: Lindsey Byfield, Lindsey.M.Byfield@usace.army.mil.

1. CONTRACT ID CODE PAGE OF PAGES

1 2

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

16C. DATE SIGNED

BY 23-Feb-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 W912BV21R0008

X 9B. DATED (SEE ITEM 11)

22-Dec-2020

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

23-Feb-2021

CODE

CONTRACTING DIV

US ARMY CORPS OF ENGINEERS, TULSA DISTRICT

2488 E. 81ST STREET

TULSA OK 74137-4290

W912BV 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W912BV21R0008

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES BELOW

Repair Center Runway B-17235 XTLF 151002

Vance Air Force Base, OK Final Submittal

SECTION 00 11 00 Page 1

SECTION 00 11 00

PRICING (CLIN) SCHEDULE

CLIN Estimated Unit Unit Amount

No. Description Quantity Price

--------------------------------BASE PROPOSAL--------------------------------

Runway 17C/35C

0001 DEMOLITION 1 JOB $ _ $ _______

0002 PREPARE SUBGRADE AND 1 JOB $ _ $ _______

BASE COURSES

0003 ASPHALT PAVEMENT 1 JOB $ _ $ _______

0004 CONCRETE PAVEMENT 1 JOB $ _ $ _______

0005 PAVEMENT MARKINGS 1 JOB $ _ $ _______

0006 SALSF APPROACH LIGHTING

SYSTEMS RUNWAY 17C/35C 1 JOB $ _ $ _______

0007 TEMPORARY ILS SYSTEMS FOR

RUNWAY 17R/35L 1 JOB $ _ $ _______

0008 ALCMS MODIFICATIONS 1 JOB $ _ $ _______

0009 AS-BUILT DRAWINGS 1 JOB $ _ $ _______

0010 O&M MANUALS 1 JOB $ _ $ _______

0011 ALL OTHER WORK REQUIRED

BY THE CONTRACT DOCUMENTS

FOR RUNWAY 17C/35C 1 JOB $ _ $ _______

SUBTOTAL REPAIR CENTER RUNWAY B-17235

(CLINS 0001 – 0011 INCLUSIVE) $__________________

--------------------------------OPTIONAL ITEMS-------------------------------

OPTION 1 – RUNWAY 17C/35C & TAXIWAYS C & D PCC SECTIONS

1001 CONCRETE PAVEMENT 1 JOB $ _ $ _______

1002 PREPARE SUBGRADE AND

BASE COURSES 1 JOB $ _ $ _______

1003 PAVEMENT MARKINGS WITHOUT

REFLECTIVE MEDIA 1 JOB $ _ $ _______

1004 ASPHALT PAVEMENT -1 JOB $ _ $ _______

1005 GRADED CRUSHED AGGREGATE BASE

COURSES -1 JOB $ _ $ _______

1006 ALL OTHER WORK REQUIRED

SECTION 00 11 00 Page 2

FOR THE RUNWAY 17C/35C &

TAXIWAYS C & D PCC SECTIONS 1 JOB $ _ $____________

SUBTOTAL OPTION 1

(CLINS 1001 – 1006 INCLUSIVE) $__________________

TOTAL BASE PROPOSAL AND OPTION

(CLINS 0001 – 0011 AND

1001 – 1006 INCLUSIVE) $__________________

Contract Duration (See Note 5):__________________

NOTES FOR PRICING (CLIN) SCHEDULE

1) Bidders must insert a price on all numbered items of the Proposal Schedule.

The price may be zero dollars or a deduct amount. Failure to do so will disqualify the proposal.

2) To better facilitate the receipt and proposal process, all modifications to proposals are to be submitted on copies of the latest Bid Schedule as published in the solicitation or the latest amendment thereto. In lieu of indicating additions/deductions to line items, all Offerors should state their revised prices for each item.

3) All extensions of the unit prices shown will be subject to verification by the Government. In case of variation between the unit price and the extension, the unit price will be considered the offer.

4) Include all costs for coordination and accommodation of Government-

Furnished, Government-Installed Equipment, as described in the bid documents, in the Bid Schedule Items for construction of the associated facilities.

5) The Offeror shall have contract duration in number of calendar days after the Notice to Proceed (NTP) is received by the Contractor, whether via electronic means or hard copy, whichever is the earliest method of delivery.

The total number of calendar days for construction through completion, ready for turnover shall not exceed the number of calendar days specified in FAR

52.211-10, Commencement, Prosecution, and completion of work. The proposed duration shall become the required contract duration. The Government may issue the NTP via e-mail or Facsimile (FAX) or by other means. Day number

1 is the day after the date of receipt of the NTP.

6) Responders are advised that this requirement may be delayed, cancelled or revised at any time during the solicitation, selection, evaluation, negotiation and/or final award process based on decisions related to DOD changes in force structure and disposition of the Armed Forces.

7) The Army will procure this facility through a design and cost competition in accordance with the provisions set forth in this Request for Proposals (RFP).

When the task order is awarded, it will be a “Firm Fixed Price Contract”.

8) Any proposal that is materially unbalanced as to prices for the Base Schedule may be rejected in accordance with FAR 52.215-1, Instructions to Offerors –

Competitive Acquisition.

SECTION 00 11 00 Page 3

9) ABBREVATIONS – For the purpose of this solicitation, the units of measure are represented as follows:

a. BCY (Bank Cubic Yard)

b. EA (Each)

c. LF (Linear Feet)

d. SY (Square Yard)

e. TN (Tons)

f. MSF (Thousand Square Feet)

10) CONDITIONS GOVERNING EVALUATION OF PROPOSALS AND AWARD OF CONTRACT.

One contract only will be awarded on this project and evaluation will be made on the Total Base Bid Plus Options in accordance with the

Instructions to Offeror’s.

11) Description of Bid Items - The general outline of the principal features of each item as listed below does not in any way limit the responsibility of the proposer for making a thorough investigation of the drawings and the specifications to determine the scope of work.

Description of Base Bid Items

(a) CLINS 0001 - 0011 These CLINs include all items shown and stated within the proposed plan set and specifications, with the following included: Placement of a new HMA surface and aggregate base course on the center 7,217' (sta. 110+00 to sta. 182+17) portion of the

Runway. Provide HMA pavement sections on the section of Taxiway D and both sections of Taxiway C to be replaced as shown.

OPTIONS:

(b) OPTION 1, CLINS 1001 – 1006 include all added and removed cost for furnishing materials and labor for the complete installation of a

PCC Section for Runway 17C/35C and Taxiways C & D per plan sheets

CP307, CP308, CP309 and COP310. CLINs 1001 through 1006 will be awarded together. The Government may exercise all CLINs associated with Option 1 (CLINs 1001 – 1006) for a period from contract award and Notice to Proceed (NTP) to 180 days after NTP is issued.

--END OF SECTION—

SECTION 00 11 00 Page 4

ATTACHMENT 1

COST BREAKDOWN REQUIRED

It is the responsibility of the Contractor to determine all quantities for purposes of their proposal to provide for a complete and approved project according to the Contract documents. The quantities and items shown within are for REFERENCE ONLY and do not in any way obligate the Government regarding said quantities and/or items provided.

BASE PROPOSAL (CLINS 0001 TO 0011)

CLIN 0001 DEMOLITION Quantity Unit Unit Price Ext Price

REMOVE BITUMINOUS PAVEMENT 1 JOB $ _ $ _______

REMOVE RIGID PAVEMENT 1 JOB $ _ $ _______

CRACK & SEAT RIGID 1 JOB $ _ $ _______

PAVEMENT

CLIN 0001 SUBTOTAL $______________

CLIN 0002 PREPARE SUBGRADE Quantity Unit Unit Price Ext Price

AND BASE COURSES

6” UNDERDRAIN 1 JOB $ _ $ _______

8” UNDERDRAIN OUTLETS 1 JOB $ _ $ _______

EXCAVATION 1 JOB $ _ $ _______

BORROW 1 JOB $ _ $ _______

SUBBASE 1 JOB $ _ $ _______

TOPSOIL STRIPPING 1 JOB $ _ $ _______

STABILIZED DRAINAGE LAYER 1 JOB $ _ $ _______

AGGREGATE BASE

COURSE (6” THICKNESS) 1 JOB $ _ $ _______

COURSE (12” THICKNESS) 1 JOB $ _ $ _______

COURSE (17.5” THICKNESS) 1 JOB $ _ $ _______

GRADED CRUSHED AGGREGATE BASE

COURSE (6.5” THICKNESS) 1 JOB $ _ $ _______

COURSE (7” THICKNESS) 1 JOB $ _ $ _______

COURSE (7.5” THICKNESS) 1 JOB $ _ $ _______

SECTION 00 11 00 Page 5

COURSE (8” THICKNESS) 1 JOB $ _ $ _______

COURSE (9” THICKNESS) 1 JOB $ _ $ _______

COURSE (9.5” THICKNESS) 1 JOB $ _ $ _______

CLIN 0002 SUBTOTAL $_____________

CLIN 0003 ASPHALT PAVEMENT Quantity Unit Unit Price Ext Price

ROUTE & SEAL ASPHALT

CRACKS 1 JOB $ _ $ _______

BITUMINOUS TACK COAT 1 JOB $ _ $ _______

BITUMINOUS PRIME COAT 1 JOB $ _ $ _______

HOT MIX ASPHALT (HMA)

- SURFACE COURSE 1 JOB $ _ $ _______

- SHOULDERS 1 JOB $ _ $ _______

- BASE LAYER 1 JOB $ _ $ _______

- VAR. DEPTH LEVELING 1 JOB $ _ $ _______

COURSE

GROOVING BITUMINOUS 1 JOB $ _ $ _______

PAVEMENT

CLIN 0003 SUBTOTAL $______________

CLIN 0004 CONCRETE PAVEMENT Quantity Unit Unit Price Ext Price

CONCRETE PAVEMENT FOR

AIRFIELDS – 12.5” THICK 1 JOB $ _ $ _______

AIRFIELDS – 13” THICK 1 JOB $ _ $ _______

GROOVING RIGID PAVEMENT 1 JOB $ _ $ _______

CLIN 0004 SUBTOTAL $______________

CLIN 0005 PAVEMENT MARKINGS Quantity Unit Unit Price Ext Price

PAVEMENT MARKINGS WITH

PAVEMENT MARKINGS WITHOUT

CLIN 0005 SUBTOTAL $_______________

SECTION 00 11 00 Page 6

CLIN 0006 SALSF APPROACH Quantity Unit Unit Price Ext Price

LIGHTING SYSTEMS RUNWAY 17C/35C

SALSF APPROACH LIGHTING

SYSTEMS RUNWAY 17C/35C 1 JOB $ _ $ _______

CLIN 0006 SUBTOTAL $_______________

CLIN 0007 TEMPORARY ILS Quantity Unit Unit Price Ext Price

SYSTEMS FOR RUNWAY 17R/35L

TEMPORARY ILS SYSTEMS FOR

RUNWAY 17R/35L 1 JOB $ _ $ _______

CLIN 0007 SUBTOTAL $_______________

CLIN 0008 ALCMS MODIFICATIONS Quantity Unit Unit Price Ext Price

ALCMS MODIFICATIONS 1 JOB $ _ $ _______

CLIN 0008 SUBTOTAL $_______________

CLIN 0009 ASBUILT DRAWINGS Quantity Unit Unit Price Ext Price

AS-BUILT DRAWINGS 1 JOB $ _ $ _______

CLIN 0009 SUBTOTAL $_______________

CLIN 0010 O&M MANUALS Quantity Unit Unit Price Ext Price

O&M MANUALS 1 JOB $ _ $ _______

CLIN 0010 SUBTOTAL $______________

CLIN 0011 OTHER WORK Quantity Unit Unit Price Ext Price

ALL OTHER WORK REQUIRED

FOR RUNWAY 17C/35C 1 JOB $ _ $ _______

CLIN 0011 SUBTOTAL $_______________

OPTION 1 (CLINS 1001 TO 1006)

CLIN 1001 CONCRETE PAVEMENT Quantity Unit Unit Price Ext Price

AIRFIELDS – 10.5” THICK 1 JOB $ _ $ _______

AIRFIELDS – 11” THICK 1 JOB $ _ $ _______

AIRFIELDS – 12.5” THICK 1 JOB $ _ $ _______

AIRFIELDS – 13” THICK 1 JOB $ _ $ _______

SECTION 00 11 00 Page 7

CLIN 1001 SUBTOTAL $_______________

CLIN 1002 PREPARE SUBGRADE Quantity Unit Unit Price Ext Price

AND BASE COURSES

COURSE (6” THICKNESS) 1 JOB $ _ $ _______

CLIN 1002 SUBTOTAL $_______________

CLIN 1003 PAVEMENT MARKINGS Quantity Unit Unit Price Ext Price

WITHOUT REFLECTIVE MEDIA

PAVEMENT MARKINGS WITHOUT

CLIN 1003 SUBTOTAL $______________

CLIN 1004 ASPHALT PAVEMENT Quantity Unit Unit Price Ext Price

BITUMINOUS TACK COAT -1 JOB $ _ $ _______

– SURFACE COURSE -1 JOB $ _ $ _______

- BASE LAYER -1 JOB $ _ $ _______

CLIN 1004 SUBTOTAL $______________

CLIN 1005 GRADED CRUSHED Quantity Unit Unit Price Ext Price

AGGREGATE BASE COURSES

COURSE (6.5” THICKNESS) -1 JOB $ _ $ _______

COURSE (7” THICKNESS) -1 JOB $ _ $ _______

COURSE (7.5” THICKNESS) -1 JOB $ _ $ _______

COURSE (8” THICKNESS) -1 JOB $ _ $ _______

COURSE (9” THICKNESS) -1 JOB $ _ $ _______

CLIN 1005 SUBTOTAL $______________

CLIN 1006 OTHER WORK Quantity Unit Unit Price Ext Price

ALL OTHER WORK REQUIRED

FOR THE RUNWAY 17C/35C &

TAXIWAYS C & D PCC SECTIONS 1 JOB $ _ $ _______

SECTION 00 11 00 Page 8

CLIN 1006 SUBTOTAL $_______________

REPAIR CENTER RUNWAY

Vance AFB, OK

SECTION 33 46 16

SUBDRAINAGE PIPING

05/18

PART 1 GENERAL

This section is for the materials and placement of the required perforated underdrain pipe, lateral pipes, manholes and risers, endwalls, underdrain trench fabric, and porous backfill (filter material) for the underdrain trench .

The proposed underdrain systems shall be installed at an early stage in the construction to aid in removal of the subsurface water. The underdrain trench once placed shall be protected from surrounding soil infiltration at all times .

1.1 UNIT PRICES

1.1.1 Pipe Subdrains

Measure the length of pipe installed from end to end along the centerlines without any deduction for the diameter of the manholes. Pipe will be paid for according to the number of linear feet of subdrains and outlet pipes placed in the accepted work. Payment for required excavation, bedding and filter materials, including geotextiles, will be included in the payment for the pipe subdrain system.

All manholes, flushing risers, endwalls, connections, and any other incidental items are to be included under "Other Work".

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.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS

(AASHTO)

AASHTO M 252 (2009; R 2017) Standard Specification for Corrugated Polyethylene Drainage Pipe

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM C33/C33M (2018) Standard Specification for Concrete Aggregates

ASTM C136/C136M (2019) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM C478 (2018) Standard Specification for Circular Precast Reinforced Concrete Manhole

SECTION 33 46 16 Page 1 XTLF151002

Sections

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

ASTM D2321 (2018) Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications

ASTM D2467 (2015) Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

ASTM D3034 (2016) Standard Specification for Type PSM Poly(Vinyl Chloride) (PVC) Sewer Pipe and Fittings

ASTM F758 (2014) Smooth-Wall Poly(Vinyl Chloride) (PVC) Plastic Underdrain Systems for Highway, Airport, and Similar Drainage

ASTM F949 (2020) Standard Specification for Poly(Vinyl Chloride) (PVC) Corrugated Sewer Pipe with a Smooth Interior and Fittings

1.3 SUBMITTALS

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

submittals not having a "G" designation are for Contractor Quality Control approval. Submit the following in accordance with Section 01 33 00

SUBMITTAL PROCEDURES:

SD-03 Product Data

Aggregates ; G

Manhole Frames And Covers ; G

SD-04 Samples

Geotextile

Pipe and Pipe Fittings

SD-07 Certificates

Geotextile

Pipe and Pipe Fittings

1.4 DELIVERY, STORAGE, AND HANDLING

1.4.1 Delivery and Storage

Inspect materials delivered to site for damage; unload, and store with minimum handling. Do not store materials directly on the ground. Keep the inside of pipes and fittings free of dirt and debris. Keep, during

SECTION 33 46 16 Page 2 XTLF151002 shipment and storage, geotextile wrapped in burlap or similar heavy duty protective covering. Protect the geotextile from mud, soil, dust, and debris. Do not store geotextile materials in direct sunlight. Install plastic pipe within 6 months from the date of manufacture unless otherwise approved.

1.4.2 Handling

Handle materials in such a manner as to ensure delivery to the trench in sound undamaged condition. Carry pipe to the trench.

PART 2 PRODUCTS

2.1 PIPE FOR SUBDRAINS

Submit samples of pipe and pipe fittings , before starting the work.

Provide type and sizes of subdrain pipe indicated. Submit certifications from the manufacturers attesting that materials meet specification requirements. Certificates are required for drain pipe and fittings.

2.1.1 Plastic

Provide plastic pipe containing ultraviolet inhibitor to provide protection from exposure to direct sunlight. Provide pipe with with bell and spigot or solvent cement joints. Provide manufacturer's standard type fittings conforming to the indicated specification.

2.1.1.1 Polyvinyl Chloride (PVC) and Fittings

ASTM D3034, ASTM F949 or ASTM F758, Type PS 46.

Outlet pipes to be Sch. 80 PVC per ASTM D1785 and ASTM D2467.

2.1.1.2 Corrugated Polyethylene (PE) and Fittings

AASHTO M 252, Type S or SP as indicated.

2.1.1.3 Pipe Perforations

Provide pipe perforations with a minimum water inlet area of 0.5 square inch per linear foot and as specified below.

2.1.1.3.1 Slotted Perforations in Plastic Pipe

Cleanly cut circumferential slots so as not to restrict the inflow of water and uniformly spaced along the length and circumference of the pipe. Provide pipe with slots not exceeding 1/8 inch nor less than 1/32 inch in width. Provide pipe with individual slot lengths not exceeding 10 percent of the pipe inside nominal circumference on 6 to 8 inch diameter pipe, and 2-1/2 inches on 10 inch diameter pipe. Symmetrically space rows of slots so that they are fully contained in 2 quadrants of the pipe.

Center slots in the valleys of the corrugations of profile wall pipe.

2.2 GEOTEXTILE

Provide geotextile conforming to AASHTO M 288 and meeting the subsurface drainage requirements. Provide geotextile that is a nonwoven pervious sheet of polymeric material consisting of long-chain synthetic polymers

SECTION 33 46 16 Page 3 XTLF151002 composed of at least 95 percent by weight polypropylene (PP) or polyester (PET). The use of woven slit film geotextiles (i.e. geotextiles made from yarns of a flat, tape-like character) will not be allowed. Add stabilizers and/or inhibitors to the base polymer, as needed, to make the filaments resistant to deterioration by ultraviolet light, oxidation, and heat exposure. The equivalent opening size (AOS) will be no finer than US Standard Sieve No. 70 and no coarser than US Standard Sieve No. 40. AOS is defined as the number of the US Standard sieve having openings closest in size to the filter fabric openings. The minimum grab strength will be 160 pounds in accordance with ASTM D4632/D4632M. Provide geotextile with filaments constructed so as to retain their relative position with respect to each other. Selvage or otherwise finish the edges of the geotextile to prevent the outer material from pulling away from the fabric.

Submit samples of geotextile and certifications from the manufacturers attesting that geotextile meets specification requirements.

2.3 SUBDRAIN FILTER AND BEDDING MATERIAL

Provide subdrain filter (filter material) and bedding material Aggregates composed of washed gravel, crushed stone, crushed stone screenings, or slag composed of hard, tough, durable particles free from adherent coatings. Filter material may not contain corrosive agents, organic matter, or soft, friable, thin, or elongated particles. Provide filter material that is evenly graded between the limits specified in TABLE I.

Gradation curves will exhibit no abrupt changes in slope denoting skip or gap grading. Provide filter materials that are clean and free from soil and foreign materials. Remove and replace filter blankets found to be dirty or otherwise contaminated with material meeting the specific requirements, at no additional cost to the Government.

TABLE I

Type II Gradation 57

ASTM C33/C33M

ASTM C136/C136M Sieve Size Percent Passing

1-1/2 inch 100

1 inch 90 - 100

3/8 inch 25 - 60

No. 4 5 - 40

No. 8 0 - 20

No. 16 --

No. 50 --

No. 100 --

SECTION 33 46 16 Page 4 XTLF151002

2.4 DRAINAGE STRUCTURES

Manholes and castings shall meet the requirements for airport loading.

Items to be designed and provided for a minimum loading of 100,000 lbs, with a tire pressure of 250 psi.

Provide detailed Engineer's stamped drawings of proposed manholes, risers and endwalls within the manhole frames and covers submittal package. See information within on each particular item.

2.4.1 Concrete

Provide concrete and reinforced concrete conforming to the requirements for concrete in Section 03 30 53 MISCELLANEOUS CAST-IN-PLACE CONCRETE.

2.4.2 Mortar

Provide mortar for connections to drainage structures that is composed of one part by volume of portland cement and two parts of sand. Provide sufficient quantity of water in the mixture to produce a stiff workable mortar. Use water that is clean and free of injurious acids, alkalies, and organic impurities. Use the mortar within 30 minutes from the time the ingredients are mixed with water.

2.4.3 Manholes and Appurtenances

2.4.3.1 Precast Reinforced Concrete Manhole Risers and Tops

ASTM C478.

2.4.3.2 Precast Concrete Manhole Bases

ASTM C478. Provide bases that allow suitable connection with influent and effluent lines and to provide a suitable base structure for riser sections.

2.4.3.3 Frames and Covers or Gratings

Except as otherwise permitted, provide frames and gratings, or frames and covers meeting aircraft rated loading of minimum 100,000 lbs with a tire pressure of 250 psi.

2.4.3.4 Steel Ladder

Provide a steel ladder where the depth of a manhole exceeds 12 feet . The ladder will be not less than 16 inches in width, with 3/4 inch diameter rungs spaced 12 inches apart. Provide two stringers that are a minimum 3/8 inch thick and 2 inches wide. Adequately anchor ladder to the wall by means of steel inserts spaced not more than 6 feet apart vertically, and install so as to provide at least 6 inches of space between the wall and the rungs. Galvanize ladders and inserts after fabrication in conformance with ASTM A123/A123M .

PART 3 EXECUTION

3.1 EXCAVATION AND BEDDING FOR SUBDRAIN SYSTEMS

Excavate trenches, including the removal of rock and unstable material, in accordance with Section 31 00 00 EARTHWORK. Bedding material shall be placed in the trench as indicated or as required as replacement materials

SECTION 33 46 16 Page 5 XTLF151002 used in those areas where unstable materials were removed. Compaction of the bedding material shall be as specified for cohesionless material in Section 31 00 00 EARTHWORK.

3.2 MANHOLES AND FLUSHING AND OBSERVATION RISERS

3.2.1 Manholes

Install manholes complete with frames and covers or gratings at the locations and within the limits and sizes indicated. Construct manholes of one of the materials specified for manholes in paragraph DRAINAGE STRUCTURES. Completely fill precast concrete manhole joints so that they are smooth and free of surplus mortar or mastic on the inside of the structure. Use either precast or cast-in-place concrete manhole bases.

3.2.2 Flushing and Observation Risers

Install flushing and observation riser pipes with frames and covers at the locations indicated as as shown in the plan set. Construct risers with non-perforated PVC Sch. 80 pipe. Join riser pipes to the subdrain system as indicated.

3.3 INSTALLATION OF GEOTEXTILE AND PIPE FOR SUBDRAINS

3.3.1 Installation of Geotextile

3.3.1.1 Trench Lining and Overlaps

Grade trenches to be lined with geotextile to obtain smooth side and bottom surfaces so that the geotextile will not bridge cavities in the soil or be damaged by projecting rock. Lay the geotextile flat but not stretched on the soil, and secure it with anchor pins in accordance with manufacturer's instructions. Overlap at least 6 to 12 inches , and secure with anchor pins along the overlaps.

3.3.2 Installation of Pipe for Subdrains

3.3.2.1 Pipelaying

Install pipe in accordance with the manufacturer's recommendations.

Thoroughly examine each section of pipe before being laid; do not use defective or damaged pipe. Do not lay pipe when the trench conditions or weather is unsuitable for such work. Remove water from trenches by sump pumping or other approved methods. Lay the pipe to the grades and alignment as indicated. Bed the pipe to the established gradeline.

Center perforations on the bottom of the pipe. Lay bell-and-spigot type with the bell ends upstream. Approval of all in-place pipes by the Contracting Officer is required prior to backfilling.

3.4 INSTALLATION OF FILTER MATERIAL AND BACKFILLING FOR PERFORATED

SUBDRAINS

After perforated pipe for subdrains has been laid, inspected, and approved, place filter material around and over the pipe to the depth indicated. Place the filter material in layers not to exceed 8 inches thick. Thoroughly compact each layer using mechanical tampers or rammers.

Once installed, protect the trench and filter material from surrounding soil infiltration at all times. If an area of trench, trench filter

SECTION 33 46 16 Page 6 XTLF151002 material, or bedding material becomes silted by surrounding soil materials, the area is to have the filter material removed, pipe cleaned, with new filter material placed to the approval of the Contracting Officer. Pipe cleaning along with the removal and replacement of the silted filter material to be at no cost to the Government.

3.5 INSTALLATION OF BEDDING AND BACKFILL FOR NON-PERFORATED SUBDRAIN

OUTFALL PIPE

3.5.1 Plastic Pipe

Place and compact pipe embedment for plastic pipe in accordance with ASTM D2321. Use Class IB or II embedment materials.

3.6 INSTALLATION OF AND BACKFILLING FOR BLIND OR FRENCH DRAINS

Place filter material as indicated and compact as specified for cohesionless materials in Section 31 00 00 EARTHWORK. Extend filter material to a suitable outlet or to an outlet through a pipeline as indicated. Place and compact overlying backfill material as specified in Section 31 00 00 EARTHWORK.

3.7 FIELD QUALITY CONTROL

Protect underdrain and outlet piping and adjacent areas from superimposed and external loads during construction.

Testing of non-perforated outlet pipes is the responsibility of the Contractor and to be witnessed by the COR. Perform all testing and retesting at no additional cost to the Government.

Check each non-perforated PVC pipe for rips, tears, joint separations, soil migration through the joint, cracks, localized bucking, bulges, settlement and alignment. Replace pipes having rips, tears, cracks or splits. Fix and repair all areas of joint separation, buckling, bulges, settlement and out of alignment.

Conduct deflection test no sooner than 30 days after completion of final backfill and compaction testing. Clean or flush all lines prior to testing. Perform a deflection test on entire length of installed flexible pipeline upon completion of work adjacent to and over the pipeline, including backfilling, placement of fill, grading, paving, placement of concrete, and any other superimposed loads. Deflection of pipe in the installed pipeline under external loads shall not exceed 5 percent of the average inside diameter of pipe. Use a laser profiler to determine if allowable deflection has been exceeded.

Inspect pipe interior with laser profiling equipment. Utilize low barrel distortion video equipment for pipe sizes 48 inches or less. Use a camera with suitable lighting to allow a clear picture of the entire periphery of the pipe interior. Center the camera in the pipe both vertically and horizontally. The camera must be able to pan and tilt to a 90 degree angle with the axis of the pipe rotating 360 degrees. Use equipment to move the camera through the pipe that will not obstruct the camera's view or interfere with proper documentation of the pipe's condition. The video image shall be clear, focused, and relatively free from roll static or other image distortion qualities that would prevent the reviewer from evaluating the condition of the pipe.

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When deflection readings are in excess of the allowable deflection of average inside diameter of pipe are obtained, remove pipe which has excessive deflection and replace with new pipe. Retest 30 days after completing backfill and compaction testing.

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