12B0017_Amend0003_Specs.pdf

US ARMY ENGINEER DISTRICT, PHILADELPHIA

POC: EMILY GIARDINO

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

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)

30-105-04 EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

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

FAR (48 CFR) 53.243

THIS AMENDMENT DOES NOT EXTEND THE BID OPENING DATE OF 30 AUGUST 2012; 2:00 PM

(Continued)

1. CONTRACT ID CODE PAGE OF PAGES

J 1

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

16C. DATE SIGNED

BY

16B. UNITED STATES OF AMERICA 15C. DATE SIGNED 15B. 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 W912BU-12-B-0017

X 9B. DATED (SEE ITEM 11)

12-Jul-2012

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) Cobbs Creek Watershed (Indian Creek) Habitat Improvement, Philadelphia, Pennsylvania

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

20-Aug-2012

CODE

US ARMY ENGINEER DISTRICT, PHILADELPHIA

CONTRACTING DIVISION

WANAMAKER BUILDING

100 PENN SQUARE EAST

PHILADELPHIA PA 19107-3390

W912BU 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE W912BU

FACILITY CODE CODE

EMAIL: TEL:

THIS PAGE INTENTIONALLY LEFT BLANK

Amendment No. 0003 Invitation for Bids

W912BU-12-B-0017

14. DESCRIPTION OF AMENDMENT (continued)

a. REQUESTS FOR INFORMATION – Please see attached responses to RFIs.

b. GENERAL NOTE - The following specification sections have been amended. Some pages have been provided that contain no changes in order to enable double-sided printing, or to provide information that has moved as a result of changes that were made on other sheets. All pages have been annotated with “Amendment No. 0003” in the header. With the exceptions of added attachments Section 00880, all revisions are shown in bold italics.

c. SPECIFICATIONS - Please delete the following specification sections or pages in their entirety and substitute new sections or pages of the same title and number attached hereto, unless otherwise described.

(1) SPECIAL CONTRACT REQUIREMENTS – TABLE OF CONTENTS

(2) SECTION 01 57 20.00 10 - ENVIRONMENTAL PROTECTION, Pages 13 and 14

(3) SECTION 03 15 00.00 10 – CONCRETE ACCESSORIES, Pages 7 and 8

(4) SECTION 31 32 39 - BIOENGINEERING PRACTICES FOR STREAM BANK AND

SHORELINE STABILIZATION, Pages 5 through 7

(5) SECTION 32 92 19 - SEEDING, Pages 3 through 7.

d. SPECIFICATIONS - Please add the following new specification section to the contract specifications.

(1) SECTION 00880 – COMBINED SEWER OVERFLOW (CSO) INSPECTION REPORT.

e. CONTRACT DRAWINGS - Please delete previously issued drawing sheets 1 through 54, originally dated 09 May 2012 and substitute revised drawing sheets of the same numbers, with a revision date of 08 August 2012, attached hereto.

f. Please indicate receipt of this amendment on Standard Form 30 (AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT) as Amendment No. 0003. Failure to acknowledge all amendments may be cause for rejection of the offer.

RFI and Response Document

Project Table of Content Section 01270 Measurement and Payment Section is not listed and not included in the material provided. This section is generally provided describing the scope of work that should be included in each Bid Item number. Please provide same.

Appropriate measurement and payment paragraphs are included in each spec section. No separate section is required. See amendment for revisions to the M&P paragraphs of two sections.

Specification Section 32 93 00 Exterior Plants states that the banks will be stabilized with live stakes from one foot above the edge to the water of bank full elevation. The height of the water can vary drastically depending on the seasons and weather, please provide the elevation for the edge of the water.

Specification Section 32 93 00 does not contain the inquired statement. Statement is found on Sheet 54 of 54.

Water surface elevations and bank full elevations are shown on existing profiles.

Please provide quantity for live stakes, none is shown on sheet 54 of 54.

Not available.

Live stakes are only available December thru late March while plants are dormant; will they be needed close to this time frame?

Contactor will need to schedule accordingly. NTP dependent on time required to complete all necessary pre-construction submittals.

On sheet 53 of 54 indicates that the Live Cuttings will be located in the trenches perpendicular to the channel. How many of these trenches will be there? How big will these trenches be?

See amended specification Section 31 32 39.

Specification Section 32 92 19 Page 3 calls for two types of seed mixes. A permanent seed mix and a native wild flower mix. Para 2.1.2 C states that Wild Flower shall apply to areas indicated on the plans.

There is no indication on the plans. Please advise.

See amended specification Section 32 92 19.

Sheet 5 of 54 – Stream centerline stationing is not shown for the proposed alignment. Can you provide a revised sheet with stationing included as is done on sheets 6-8?

See amended drawings.

Amendment No. 0003

IFB W912BU-12-B-0017

RFI - 1

Sheet 8 of 54 / 10 of 54 – Sheet 8 indicates the approximate location of an elevated 8” Buckeye Partners Products Pipe Line crossing the East Branch at approximately station 7+35, however the pipe line is not shown on the profile sheet 10. Can you provide the pipeline elevation?

Pipe line elevation is under the elevation of the proposed access road and significantly above the elevation of the existing East Branch. For exact elevation information, bidders are expected to contact the owner at the telephone number provided on the project plans.

Sheet 37 of 54 – Profile/notes for 6x6 culvert is difficult to read due to heavy grid lines. Can you provide a revised sheet with legible profile notes?

See amended drawings.

Can the Contractor use rock from the on-site quarry? No. On-site quarry is inactive.

Per the specifications can you provide a copy of all the project Permits? (Section 01 11 00 Page 2)

See Amendment 0002.

Do you have information on the interior current condition of the 6’ by 6’ box culvert? Is it full of debris, soil, etc or is it relatively clean?

See amendment for new section 00880, CSO Inspection Report.

RFI - 2

SPECIAL CONTRACT REQUIREMENTS

TABLE OF CONTENTS

TABLE OF CONTENTS

SPECIAL CONTRACT REQUIREMENTS

00800 SPECIAL CLAUSES

00805 CONTRACT ADMINISTRATION

00815 WAGE RATES

00835 REGIONS FOR THE CONSTRUCTION EQUIPMENT OWNERSHIP AND

OPERATION EXPENSE SCHEDULE

00850 GEOTECHNICAL INVESTIGATION REPORT

00860 WETLAND REPORT

00870 HTRW SAMPLING AND ANALYSIS

00880 COMBINED SEWER OVERFLOW (CSO) INSPECTION REPORT

CSO Inspection Report

Greenhorne & O'Mara, Inc. (G&O)

Combined Sewer Overflow (CSO) Inspection Report

Cobbs Creek Watershed Habitat Improvement Project for

Philadelphia District, USACE

Contract Number W91236-09-D-0088

SUMMARY

This report documents the findings from a visual inspection of the 700-linear foot section of the

6-foot by 6-foot Combined Sewer Overflow (CSO) culvert structure (see Figures 1 and 2) conducted on September 9, 2010. The purpose of the inspection was to determine the structural integrity of the CSO structure.

Based on the visual inspection, it appeared that the culvert is generally in good structural condition. However, several joint locations with spalled concrete and exposed reinforcements will need to be repaired and patched. Since the CSO culvert structure will be exposed to sewage in the future, there may be a need to apply a protective coating to the concrete lining in order to protect it from corrosion.

Figure 1. Upstream (left) and downstream (right) view of the CSO culvert structure

00880 - 1

CSO Inspection Report Page 2

Figure 2. Cross-section view of the CSO culvert structure

INTRODUCTION

Section 2.5.2 of G&O’s Cobbs Creek Watershed Habitat Improvement Project Technical

Proposal stated that G&O would conduct an inspection with the Philadelphia Water Department

(PWD) of the existing 700-linear foot CSO to assess its structural integrity. Taking photographs and/or videos during the CSO inspection was part of the task.

INSPECTION TEAM

The inspection was conducted on September 9, 2010.

Team members included:

Jimmy Yeung G&O – Structural Engineer

Ross Voorhees G&O – HazMat Specialist

Erik Haniman PWD

Rick Howley PWD

Alex Haptermariam G&O - Attendee

Time of Inspection – 10:00 a.m. to 11:30 a.m.

FINDINGS

The construction of the CSO culvert structure is similar to what is shown in Figure 2 above. The main difference is that there is a reinforced concrete lining along the side wall and the roof of the

Amendment No. 0003

00880 - 2

CSO Inspection Report Page 3 structure. Since this was a visual inspection, the thickness of the lining could not be determined.

The joints of the concrete lining are approximately 8 feet apart. The floor construction of the culvert structure is the same as shown in Figure 2.

The CSO culvert structure and its concrete lining appeared to be in good condition. The major concern is concrete spalling and cracks at some of the joint locations. There are about five areas with noticeable concrete spalling and cracks, at approximately 120 feet, 220 feet, 320 feet, 450 feet, and 575 feet from the upstream end of the structure. Examples of the types of spalling and cracks are shown in Figures 3 through 5 (Taken at approximately 575 feet from the upstream entrance). There are also a few areas with exposed reinforcements due to spalled concrete.

Figure 3.Cracks on the CSO culvert structure side wall (Typical)

00880 - 3

CSO Inspection Report Page 4

Figure 4. Cracks and spalled concrete on the CSO culvert structure side wall (Typical)

00880 - 4

CSO Inspection Report Page 5

Figure 5.Cracks and spalled concrete on the CSO culvert structure ceiling (Typical)

RECOMMENDATIONS

Based on the visual inspection, the CSO culvert structure appeared to be in good structural condition. It will be necessary to patch up the cracks and spalling along the joint locations prior to converting the structure to a storage vault. Furthermore, since the CSO culvert structure will be used for as a sewer, it may be necessary to apply a coating to the inside of the structure to protect the concrete from corrosion.

00880 - 5

CSO Inspection Report Page 6

00880 - 6 burials; artifacts; shell, midden, bone, charcoal, or other deposits; rock or coral alignments, pavings, wall, or other constructed features; and any indication of agricultural or other human activities. Upon such discovery or find, immediately notify the Contracting Officer so that the appropriate authorities may be notified and a determination made as to their significance and what, if any, special disposition of the finds should be made. Cease all activities that may result in impact to or the destruction of these resources. Secure the area and prevent employees or other persons from trespassing on, removing, or otherwise disturbing such resources.

3.8 BIOLOGICAL RESOURCES

Minimize interference with, disturbance to, and damage to fish, wildlife, and plants including their habitat. The protection of threatened and endangered animal and plant species, including their habitat, is the Contractor's responsibility in accordance with Federal, State, Regional, and local laws and regulations.

3.9 PREVIOUSLY USED EQUIPMENT

Clean all previously used construction equipment prior to bringing it onto the project site. Ensure that the equipment is free from soil residuals, egg deposits from plant pests, noxious weeds, and plant seeds. Consult with the USDA jurisdictional office for additional cleaning requirements.

3.10 MAINTENANCE OF POLLUTION FACILITIES

Maintain permanent and temporary pollution control facilities and devices for the duration of the contract or for that length of time construction activities create the particular pollutant.

3.11 TRAINING OF CONTRACTOR PERSONNEL

The Contractor's personnel must be trained in all phases of environmental protection and pollution control. Conduct environmental protection/pollution control meetings for all personnel prior to commencing construction activities. Additional meetings must be conducted for new personnel and when site conditions change. Include in the training and meeting agenda: methods of detecting and avoiding pollution;

familiarization with statutory and contractual pollution standards;

installation and care of devices, vegetative covers, and instruments required for monitoring purposes to ensure adequate and continuous environmental protection/pollution control; anticipated hazardous or toxic chemicals or wastes, and other regulated contaminants; recognition and protection of archaeological sites, artifacts, wetlands, and endangered species and their habitat that are known to be in the area.

3.12 POST CONSTRUCTION CLEANUP

The Contractor shall clean up all areas used for construction in accordance with Contract Clause: "Cleaning Up". Unless otherwise instructed in writing by the Contracting Officer, obliterate all signs of temporary construction facilities such as haul roads, work area, structures, foundations of temporary structures, stockpiles of excess or waste materials, and other vestiges of construction prior to final acceptance of the work. The disturbed area must be graded, filled and the entire area seeded unless otherwise indicated.

Section 01 57 20.00 10 Page 13 such resources will be temporarily suspended. Resources covered by this paragraph include but are not limited to: any human skeletal remains or

3.13 MEASUREMENT AND PAYMENT

With the exception of the materials, equipment and labor associated with providing, installing and maintaining erosion and sediment control measures and diversion and dewatering measures, no separate measurement or payment will be made for the work specified in this section. Payment of fees associated with environmental permits, application, and/or notices obtained by the Contractor, and payment of all fines/fees for violation or non-compliance with Federal, State, Regional and local laws and regulations are solely the Contractor's responsibility. All costs associated with this section, except those described at the beginning of this paragraph shall be included in the costs of all the bid items.

For measurement and payment requirements associated with the materials, equipment and labor required for providing, installing and maintaining erosion and sediment control measures and diversion and dewatering measures, see specification Sections 01 57 23 TEMPORARY STORM WATER POLLUTION CONTROL and 31 00 00 EARTHWORK.

-- End of Section --

Section 01 57 20.00 10 Page 14 firm rock or sealed to other cut-off systems. Make adequate provision to support and completely protect the waterstops during the progress of the work. Repair or replace any waterstop punctured or damaged. Protect exposed waterstops during application of form release agents to avoid being coated. Provide suitable guards to protect exposed projecting edges and ends of partially embedded waterstops from damage when concrete placement has been discontinued. Accomplish splices with certified trained personnel using approved equipment and procedures.

3.2.1 Copper And Stainless Steel

Splices in copper waterstops shall be lap joints made by brazing. Splices in stainless steel waterstops shall be welded using a TIG or MIG process utilizing a weld rod to match the stainless. All welds shall not be annealed to maintain physical properties. Do not use carbon flame in the annealing process. Damaged waterstops shall be repaired by removing damaged portions and patching. Patches shall overlap a minimum of 1 inch onto undamaged portion of the waterstop.

3.2.2 Flat Steel

Splices in flat steel waterstops shall be properly aligned, butt welded, and cleaned of excessive material.

3.2.3 Non-Metallic

Fittings shall be shop made using a machine specifically designed to mechanically weld the waterstop. A miter guide, proper fixturing (profile dependant), and portable power saw shall be used to miter cut the ends to be joined to ensure good alignment and contact between joined surfaces.

The splicing of straight lengths shall be done by squaring the ends to be joined. Maintain continuity of the characteristic features of the cross section of the waterstop (ribs, tabular center axis, protrusions, etc.)

across the splice.

3.2.3.1 Rubber Waterstop

Splices shall be vulcanized or shall be made using cold bond adhesive as recommended by the manufacturer. Splices for TPE-R shall be as specified for PVC.

3.2.3.2 Polyvinyl Chloride Waterstop

Make splices by heat sealing the adjacent waterstop edges together using a thermoplastic splicing iron utilizing a non-stick surface specifically designed for waterstop welding. Use the correct temperature to sufficiently melt without charring the plastic. Reform waterstops at splices with a remolding iron with ribs or corrugations to match the pattern of the waterstop. The spliced area, when cooled, shall show no signs of separation, holes, or other imperfections when bent by hand in as sharp an angle as possible.

3.2.3.3 Quality Assurance

Edge welding will not be permitted. Compress or close centerbulbs when welding to non-centerbulb type. Waterstop splicing defects which are unacceptable include, but are not limited to the following: 1) Tensile strength less than 80 percent of parent section. 2) Free lap joints. 3) Misalignment of centerbulb, ribs, and end bulbs greater than 1/16 inch. 4)

Section 03 15 00.00 10 Page 7

Misalignment which reduces waterstop cross section more than 15 percent.

5) Bond failure at joint deeper than 1/16 inch or 15 percent of material thickness. 6) Misalignment of waterstop splice resulting in misalignment of waterstop in excess of 1/2 inch in 10 feet. 7) Visible porosity in the weld area, including pin holes. 8) Charred or burnt material. 9) Bubbles or inadequate bonding. 10) Visible signs of splice separation when cooled splice is bent by hand at a sharp angle.

3.2.4 Non-Metallic Hydrophilic Waterstop Installation

Miter cut ends to be joined with sharp knife or shears. The ends shall be adhered with cyanacryiate (super glue) adhesive. When joining hydrophilic type waterstop to PVC waterstop, the hydrophilic waterstop shall be positioned as shown on the drawings. Apply a liberal amount of a single component hydrophilic sealant to the junction to complete the transition.

3.2.5 Preformed Plastic Adhesive Installation

The installation of preformed plastic adhesive waterstops shall be a prime, peel, place and pour procedure. Joint surfaces shall be clean and dry before priming and just prior to placing the sealing strips. The end of each strip shall be spliced to the next strip with a 1 inch overlap; the overlap shall be pressed firmly to release trapped air. During damp or cold conditions the joint surface shall be flashed with a safe, direct flame to warm and dry the surface adequately; the sealing strips shall be dipped in warm water to soften the material to achieve maximum bond to the concrete surface.

3.3 CONSTRUCTION JOINTS

Treat construction joints coinciding with expansion and contraction joints as expansion or contraction joints as applicable.

3.4 MEASUREMENT AND PAYMENT

No separate measurement or payment will be made for the work specified in this section and all costs in connection therewith shall be included in the costs of all of the relevant bid items.

Section 03 15 00.00 10 Page 8

PART 3 EXECUTION

3.1 SITE VERIFICATION OF CONDITIONS

Coordinate, through the work schedule, the timing of land disturbing activities with the provision of erosion control measures. Erosion and sediment control measures shall be provided in accordance with Section 01 57 23 TEMPORARY STORM WATER POLLUTION CONTROL and applicable Federal, State, or local requirements. Perform erosion control operations under favorable weather conditions. When excessive moisture, frozen ground, or other unsatisfactory conditions prevail, stop the work as directed. When special conditions warrant a variance to earthwork operations, a revised construction schedule shall be submitted for approval. Bioengineering materials shall not be applied in adverse weather conditions, which could affect their performance. Complete all tasks necessary for the required submittals.

3.2 HARVESTING OF VEGETATION

The source of all live cuttings shall be located on-site or within fifty

(50) miles of the project site. The Contractor shall be responsible for harvesting and transporting the cuttings to the job site. All cuts shall be smooth and the cut surface kept small. The use of large pruning shears or power saws may be required.

3.2.1 Sealing of Harvest Cuts

All harvest cuts on trunks or branches of the host vegetation shall be trimmed of loose wood or bark and sealed with an approved sealant to prevent desiccation and disease or infestation at the end of the workday without exception.

3.2.2 Harvest Site Restoration

The harvest site shall be restored to preexisting conditions as best as possible after harvesting is completed. Restoration shall include but shall not be limited to removal of aggregate or wood chip roads or access paths, access gates, and ruts or depression, or other items or features related to work activities.

3.3 TRANSPORTATION OF HARVESTED VEGETATION

a. the live materials shall be transported to the construction site within eight (8) hours of harvesting and then cut to size, as specified above and on the details.

b. Live materials must be protected against drying out and overheating before/during transport (e.g., they shall be covered transported in unheated vehicles, moistened, kept in soak pits) and on-site prior to installation (e.g., by storing in controlled conditions, storing in shade, covering with evergreen branches or plastic, placing in moist soil, or spraying with anti-transpirant chemicals). Live materials shall receive continuous shade, shall be sheltered from the wind, and shall be continuously protected from drying by being heeled into moist soils. live stakes shall be sprayed or immersed.

c. Live materials shall be installed the same day that the cuttings are harvested. If installation of live materials cannot be accomplished on the same day and storage is required, live materials

Section 31 32 39 Page 5 shall be stored for a period no longer than three (3) days.

3.4 LIVE STAKE INSTALLATION

a. Live Stakes shall be installed according to the Sequence of Construction, the plans and details, and the following specifications.

b. Erosion control fabric should be placed on the banks prior to installing the live stake.s

c. Insert the point of the stake through the fabric and tamp it into the ground at a right angle to the slope.

d. The live stakes should be installed 5 feet apart using triangular spacing.

e. Buds should be oriented up.

f. Four-fifths of the length of the live stake should be installed into the ground, and soil should be firmly packed around it after installation.

g. Do not split the stakes during installation. Stakes that split should be removed and replaced.

h. An iron bar can be used to make a pilot hole in firm soil.

i. Tamp the stake into the ground with a dead blow hammer

3.5 LIVE BRANCH CUTTING INSTALLATION - WEST BRANCH

Where the entire floodplain has been filled and/or graded (Stations 3+00 - 8+00 of the West Branch Indian Creek) live branch cuttings shall be placed in trenches excavated perpendicular to the channel. Trenches shall be spaced 25 feet apart, 3 feet deep and 10 feet long. Live cuttings shall be spaced 0.5 feet apart in the trenches. Live branch cuttings shall be 0.5-inch, to 1.5 inches in diameter. The cuttings shall be long enough for the roots to be in contact with the soil at the bottom of a three-foot-deep trench, with the growth tips extending 18 inches above the backfilled trench. Live cuttings shall consist of a mix of three or more of the following species, with each species comprising no more than 50% and no less than 20% of the mix.

Cornus amomum - Silky Dogwood Cornus stolonifera - Red Osier Dogwood Sambucus canadensis - American Elderberry Viburnum prunifolium - Blackhaw Salix sericea - Silky Willow

LIVE BRANCH CUTTING INSTALLATION - GULLY REPAIR

a. Starting at the lowest point in the gully, place a 3 - 4 inch layer of live branches perpendicular to the gully bottom.

b. Place the live branches in a crisscross pattern with the growing tips oriented toward the slope face.

c. Place the cuttings to touch the undisturbed soil at the back of the gully and protrude slightly beyond the rebuilt slope face.

d. Place the basal ends such that they are lower than the growing tips.

e. Cover the live branches with 12 inches of fill soil and compact.

Work and compact the soil to ensure contact with the branches and eliminate large voids in the fill.

f. Continue placing subsequent layers of live branches, each followed with a layer of compacted soil.

Section 31 32 39 Page 6

FIELD QUALITY CONTROL

The work site shall be inspected by the Contracting Officer prior to final acceptance of work. A punch list noting deficiencies shall be compiled by the Contracting Officer and provided to the Contractor. Perform, repair, adjust, align, or otherwise comply with the specified work on the punch list to the satisfaction of the Contracting Officer. Notify the Contracting Officer at least 14 days prior to the inspection that work shall be ready for inspection. Work will not be accepted until all punch list items are resolved and all work meets or exceeds contract requirements. Final acceptance of work shall not be provided by the Contracting Officer until all defects or deficiencies are corrected. Final Acceptance shall occur only after all corrective actions and supplemental viable plantings are complete and the structure meets performance standards and all contract requirements. Comply with necessary repairs to the structure and vegetation as stated in the warranty.

CLEAN-UP

Excess material, debris, and waste materials shall be disposed of offsite at an approved landfill or recycling center. Adjacent paved areas shall be cleared. The site shall be restored to preexisting conditions to the extent reasonably possible and to the satisfaction of the Contracting Officer.

PROTECTION

Immediately upon the start of the installation in an area, the area shall be protected against traffic or other use by erecting barricades and providing signage as required, or as directed. Protect the work site and vegetation from damage and vandalism and free of trash and debris until final acceptance by the Contracting Officer.

DOCUMENTATION

Establish and maintain documentation for bioengineering practices to record the desired information and to assure compliance with contract requirements, including, but not limited to, the following:

Final Project Report

The Final Project Report shall summarize information included in the construction and maintenance records as submitted throughout the project.

The report shall summarize the work rather than repeat the items in the individual reports.

MEASUREMENT AND PAYMENT

No separate measurement will be made for the work specified in this section. All costs in connection therewith shall be included in the cost of the bid item entitled, "Landscaping."

Section 31 32 39 Page 7

(by weight) Fox Sedge (Carex Vulpinoidea 40 Riverbank Wild-rye (Elymus Riparius) 20 Virginia Wild-rye (ElymusVirginicus) 20 Indian Grass (Sorghastrum Nutans) 10 Switch Grass (Panicum Virgatum) 10

The permanent seed mixture shall have 90% pure live seed. The mixture shall be applied at a rate of 20 lbs/ac.

c. The Contractor shall apply seed at the following mixture to all project floodplain areas. See contract drawings for locations of floodplain areas:

Species Percentage of Seed Mix (by weight) Blue Vervain (Verbena Hastata) 30 Common Sneezeweed (Helenium Autumnale) 30 New York Ironweed (Vernonia Noveboracensis) 30 Swamp Milkweed (Asclepias Incarnata) 5 Cardinal Flower (Lobelia Cardinalis) 5

The native wildflower seed mixture shall be mixed with the permanent seed mixture at 20% wildflower (by weight) and 80% permanent (by weight). The combined mixture shall be applied at a rate of 20 lbs/ac.

2.2 TOPSOIL

2.2.1 On-Site Topsoil

Surface soil stripped and stockpiled on site. When available topsoil shall be existing surface soil stripped and stockpiled on-site in accordance with Section 31 00 00 EARTHWORK.

2.2.2 Off-Site Topsoil

Additional topsoil shall be furnished by the Contractor as required.

2.3 SOIL CONDITIONERS

Add conditioners to topsoil as specified herein.

2.3.1 Lime

The materials shall be ground limestone, hydrated lime or burnt lime. Lime materials shall contain a minimum of 50% total oxides and shall be ground such that 50% passes a #100 mesh sieve and 98 - 100% shall pass a #20 mesh sieve.

2.4 FERTILIZER

Fertilizer shall be 10-20-20 Grade Fertilizer.

2.5 MULCH

Mulch shall be free from noxious weeds, mold, and other deleterious materials.

Section 32 92 19 Page 3

2.5.1 Straw

Straw mulch shall consist of well-threshed wheat, rye, or oat straw and shall be reasonably bright. Mulch must be free of mold and noxious seed and shall not be musty, caked, decayed, or excessively dusty. Furnish in air-dry condition and of proper consistency for placing with commercial mulch blowing equipment. Straw shall contain no fertile seed.

2.5.2 Wood Cellulose Fiber Mulch

Wood Cellulose Fiber Mulch shall consist of prepared wood cellulose processed into a uniform fibrous physical state, and shall contain a dye to facilitate visual inspection of the uniformity of the application. WCFM shall not contain germination- or growth-inhibiting factors.

2.6 WATER

Source of water shall be approved by Contracting Officer and of suitable quality for irrigation, containing no elements toxic to plant life.

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 EXTENT OF WORK

Provide soil preparation (including soil conditioners as required), fertilizing, seeding, and surface topdressing of all newly graded finished earth surfaces, unless indicated otherwise, and at all areas inside or outside the limits of construction that are disturbed by the Contractor's operations.

3.1.1.1 Topsoil

d. When topsoil has been stockpiled during the construction of the project, the Contractor shall spread the topsoil on the disturbed areas after the soil has been loosened and rough grading completed.

3.1.1.2 Soil Conditioner Application Rates

Apply soil conditioners at rates as determined by laboratory soil analysis of the soils at the job site. For bidding purposes only apply at rates for the following:

Lime 2000 pounds per acre

3.1.1.3 Fertilizer Application Rates

Apply fertilizer at rates as determined by laboratory soil analysis of the soils at the job site. For bidding purposes only apply at rates for the following:

10-20-20 GradeFertilizer 500 pounds per acre

3.1.1.4 Seedbed Preparation, Temporary Seeding

a. For temporary seeding, the Contractor shall prepare a suitable seedbed by loosening the soil to a depth of 3 - 6" by means of suitable equipment.

b. The area shall not be rolled or smoothed. On slopes greater than 3:1

Section 32 92 19 Page 4 the surface shall be tracked with heavy equipment such that the surface is irregular with track ridges running parallel to the slope contour.

b. The area shall not be rolled or smoothed. On slopes greater than 3:1 the surface shall be tracked with heavy equipment such that the surface is irregular with track ridges running parallel to the slope contour.

3.1.1.5 Seedbed Preparation, Permanent Seeding

a. The Contractor shall loosen all disturbed areas to a depth of 3 - 6".

In areas where repeated access by heavy equipment or trucks has caused compaction, the Contractor shall loosen the soil to a depth of 12". The Contractor may use agricultural or construction equipment to perform the task.

b. The Contractor shall conduct final grading of all disturbed areas in conformance with the Construction Drawings. All surfaces shall be smooth and free of large rocks

c. On sloped areas (greater than 3:1), the Contractor shall use track equipment to compact the slope and produce ridges parallel to the slope contour.

d. When topsoil has been stockpiled during the construction of the project, the Contractor shall spread the topsoil on the disturbed areas after the soil has been loosened and rough grading completed.

e. Apply soil amendments in rates as described above. Mix amendments into the top 3 - 5" of the topsoil by disking or other suitable means.

f. In lawn areas as shown on the Construction Drawings, the Contractor shall rake the seedbed surface to remove rocks and other large debris. The surface shall be clear of obstructions and debris and must be suitable for mowing upon establishment of the seeding.

3.2 SEEDING

3.2.1 Seed Application Seasons and Conditions

Immediately before seeding, restore soil to proper grade. Do not seed when ground is muddy frozen snow covered or in an unsatisfactory condition for seeding. If special conditions exist that may warrant a variance in the above seeding dates or conditions, submit a written request to the Contracting Officer stating the special conditions and proposed variance.

Apply seed within twenty four hours after seedbed preparation. Sow seed by approved sowing equipment. Sow one-half the seed in one direction, and sow remainder at right angles to the first sowing.

3.2.2 Seed Application Method

Seeding the stream banks shall utilize a dril or cultipacker. Broadcast seeding and hydroseeding may be utilized in the remaining areas.

3.2.2.1 Broadcast and Drop Seeding

Seed shall be uniformly broadcast at the rate indicated above. Use broadcast or drop seeders. Sow one-half the seed in one direction, and sow remainder at right angles to the first sowing. After seeding, the Contractor shall use a weighted roller over the area to provide for good

Section 32 92 19 Page 5 seed-to-soil contact..

3.2.2.2 Drill Seeding

Seed shall be drilled at the rate indicated above. Seeding completed with a cultipacker shall bury the seed to the depth specified in by the supplier and the seedbed must be firm after planting.

3.2.2.3 Hydroseeding

First, mix water and fiber. Wood cellulose fiber, paper fiber, or recycled paper shall be applied as part of the hydroseeding operation. Fiber shall be added at 1,000 pounds, dry weight, per acre. Then add and mix seed and fertilizer to produce a homogeneous slurry. Seed shall be mixed to ensure broadcasting at the rate indicated above. When hydraulically sprayed on the ground, material shall form a blotter like cover impregnated uniformly with grass seed. Spread with one application with no second application of mulch.

If fertilizer is applied at time of seeding, the application rate shall not exceed 100 lbs/ac nitrogen, 200 lbs/ac phosphorous, and 200 lbs/ac potassium. When lime is to be applied by the hydro-seeder, the rate shall not exceed 3 tons/acre burnt and hydrated lime shall not be used.

Hydro-seeding mixtures shall be prepared on site and applied immediately.

No seed/mulch mix that has been left in the seeder for more than eight (8) hours shall be used.

3.2.3 Mulching

3.2.3.1 Hay or Straw Mulch

Hay or straw mulch shall be spread uniformly at the rate of 2 tons per acre.

Mulch shall be spread by hand, blower-type mulch spreader, or other approved method. Mulching shall be started on the windward side of relatively flat areas or on the upper part of steep slopes, and continued uniformly until the area is covered. The mulch shall not be bunched or clumped. Sunlight shall not be completely excluded from penetrating to the ground surface. All areas installed with seed shall be mulched on the same day as the seeding. Mulch shall be anchored immediately following spreading.

3.2.3.2 Mechanical Anchor

Mechanical anchor shall be a V-type-wheel land packer; a scalloped-disk land packer designed to force mulch into the soil surface; or other suitable equipment.

3.2.3.3 Non-Asphaltic Tackifier

Hydrophilic colloid shall be applied at the rate recommended by the manufacturer, using hydraulic equipment suitable for thoroughly mixing with water. A uniform mixture shall be applied over the area.

3.2.4 Watering

Start watering areas seeded as required by temperature and wind conditions. Apply water at a rate sufficient to insure thorough wetting of soil to a depth of 2 inches without run off. During the germination

Section 32 92 19 Page 6 process, seed is to be kept actively growing and not allowed to dry out.

3.3 PROTECTION OF TURF AREAS

Immediately after turfing, protect area against traffic and other use.

3.4 RESTORATION

Restore to original condition existing turf areas which have been damaged during turf installation operations at the Contractor's expense. Keep clean at all times at least one paved pedestrian access route and one paved vehicular access route to each building. Clean other paving when work in adjacent areas is complete.

3.5 MEASUREMENT AND PAYMENT

No separate measurement will be made for the work specified in this section. All costs in connection therewith, to include any required imported topsoil, shall be included in the costs of the bid item entitled, "Topsoil, Seed & Mulch."

Section 32 92 19 Page 7

3.11 MEASUREMENT AND PAYMENT

2.6 WATER

3.2.4 Watering