A_-_Special_Provisions_-_final_-_240904.pdf

NPDES White Oak Pond Retrofits ITB#25-011

Table of Contents

APPENDIX A - SPECIAL PROVISIONS

1.0 GENERAL

2.0 SCOPE OF SERVICES

3.0 SCOPE OF WORK

4.0 SUPPLEMENTAL INFORMATION

4.1 VICINITY MAP

4.2 TRANSFER OF AUTHORIZATION FORM

4.3 PIPE ANCHOR DETAIL

4.4 R247 PEDESTRIAN PATH DETAIL

APPENDIX A - SPECIAL PROVISIONS (d. 09/04/2024)

PART A – SPECIAL PROVISIONS

1.0 GENERAL

1.1 PROJECT DESCRIPTION

The primary purpose of this project is to provide a stormwater quality treatment to currently untreated upstream impervious areas through the retrofit of an existing stormwater management pond facility constructed prior to water quality regulations.

This project is located at the eastern quadrant of Oak Drive, Waldorf, Maryland in Charles County, Maryland as shown on the

Vicinity Map of the Contract Drawings. This project is in support of Charles County’s efforts to fulfill the Maryland Department of the Environment’s (MDE) permit requirements to fulfill its National Pollution discharge Elimination System (NPDES) MS4 permit requirements. The work includes but is not limited to the following:

A. Perform construction stakeout.

B. Provide and maintain erosion and sediment control, traffic control, site dewatering (sump pit, filter bag, pump, pipe), mountable berm, and wildlife protection measures at all times throughout the construction period.

C. Excavate, haul, and/or dispose of an estimated 3,000 cubic yards of unclassified excavation and move approximately

3,000 cubic yards of material for onsite earthwork as defined by these special provisions.

D. Construct and install stormwater management wet pond in accordance with approved plans as detailed in the permitted drawings; with gabion basket forebay, rock inlet and outlet protection, forebay spillway, drain structures, rip rap and slope protection, including aquatic and safety benches, landscaping, and topsoil, seed and mulch of disturbed areas;

etc.

E. Demolition and disposal of Type J Inlets and Installation of Type K Inlets located at Twin Oak Drive and Bar Oak

Drive respectively. Prospective Bidders to investigate the locations due to possibility of existing culverts to be disturbed, trimmed, reinstalled, etc.

F. Install prefabricated bridge per contract drawings and ADA regulations (Fifthroom.com - Custom 5’W x 10’L Treated

Pine Hawthorne Bridge - Contact: Mike Donaldson - 888-293-2339 x229 - Mike.Donaldson@fifthroom.com - Job

Reference/Job Name: Charles County). Submit stamped engineered drawings for review and approval and for

County’s consultant to finalize abutment design.

G. Remove and dispose any damaged asphalt during construction from hiker-biker trail and replace in accordance with

Charles County’s standard detail R/2.47 (Section 4.4 herein). The County will use the preconstruction video to assess damages that resulted from construction.

H. Install class I riprap and slope channel protection.

I. Remove and dispose of 30” CMP/(Twin Pipes)

J. Provide red line as-built drawings and assist consultant with as-built preparation.

K. Other incidental work as necessary.

mailto:Mike.Donaldson@fifthroom.com

L. Note: All work pertinent to installation of pipe A 30” RCP from Bar Oak Drive and the pipe B 24” RCP from Twin

Oak Drive conveying storm drainage into the existing SWM facility as shown on the permitted drawings have already been installed and shall be excluded from this contract.

M. Install pipe anchors at all pipes that were previously installed per the Consultant’s pipe anchor detail (see Section 4.3 herein).

N. Contractor must coordinate with the Consultant Engineer and revise MDE’s NOI permit and associated Storm Water

Pollution Prevention Plan (SWPPP) as necessary based on their means and methods for performing the work. Refer to Section 4.2 herein for the Transfer of Authorization for transfer of the NOI permit.

O. Contractor to conduct turbidity testing according to MDE regulations.

The work shall be performed under contract with and under the supervision of Charles County. The Contractor shall assume all responsibility for the project and construction site until accepted by Charles County.

All work must be conducted in accordance with these Specifications and all applicable Local, State, Federal Regulations, and the permits and approvals that govern the work items. The work shall be completed in all its parts, in the time specified, and in strict accordance with the terms and conditions of the Contract. Any deviation shall be subject to the approval of the County.

The Contract Drawings and Specifications are intended to cover a complete project. It shall be distinctly understood that failure to mention any work which would normally be required to complete the project shall not relieve the Contractor of their responsibility to perform such work. The Contractor shall be prepared to deliver a finished project in every particular without extra charge, unless specifically provided for within the Contract. The work to be done under this Contract includes, but is not limited to, furnishing all plants, materials, tools, equipment, transportation, management, and labor necessary to perform all work in strict accordance with the Contract Documents.

For the purposes of this Contract, the “County” shall refer to Charles County or a designated representative. The “Engineer” shall refer to the onsite inspector.

1.2 PROJECT BACKGROUND

The existing stormwater management facility was built prior to the water quality regulations. The current condition of the facility does not meet the current standards for water quality and will need to be upgraded to meet the current standards. This project is in support of the County’s efforts to fulfill the Maryland Department of the Environment’s (MDE) and National

Pollution Discharge Elimination System (NPDES) MS4 permit requirements. This project is an approved practice and has been designed to obtain impervious area and nutrient reduction credits.

1.3 DRAWINGS AND SPECIFICATIONS

All work shall be performed in accordance with the Permitted Drawings, Contract Documents, and Specifications provided by the County. Furthermore, the work shall be in compliance with the Charles County Government’s Department of Planning and Growth Management’s Standards & Specifications for Construction and any other local, state, and federal ordinances, codes, guidelines, and regulations applicable for work effort being performed under this contract. The following specifications and standards, including addenda, amendments and errata, form a part of this specification to the extent require by the references thereto. The Contractor is responsible for adhering to any newer versions of the referenced standards and specifications. The list below contains the most frequently used standards that are referenced.

A. Charles County Standards and Specifications for Construction (labeled: “Standard Specs for Construction”) http://www.charlescountymd.gov/pgm/cpis/standard-specs-construction

B. Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 2009 Edition with Revision

Numbers 1 and 2 Incorporated, 2012. United States Department of Transportation Federal Highway Administration.

C. Maryland’s Guidance to Waterway Construction, 2000. Maryland Department of the Environment (MDE).

Baltimore, Maryland.

D. Maryland Standards and Specifications for Soil Erosion and Sediment Control, 2011. Maryland Department of the

Environment, Baltimore, Maryland.

E. Standard Specifications for Construction and Materials, 2017. Maryland Department of Transportation State

Highway Administration (MSHA).

F. 901 (Aggregates) of the Maryland State Administration’s Standard Specifications for Construction and Materials

(http://www.roads.maryland.gov/Index.aspx?PageId=44 http://www.charlescountymd.gov/pgm/cpis/standard-specs-construction http://www.roads.maryland.gov/Index.aspx?PageId=44

The Contract Documents consist of the signed contracts executed by both parties, specifications referenced throughout and any and all subsequent addenda or additions thereto, and the Contract Drawings. The Contract Drawings, dated May 31, 2023, form a part of the Contract Documents: PGM# DSP-200058; NPDES: White Oak Village Wet Pond Retrofit – consisting of Sheets

1 to 11 (Appendices).

The Special Provisions are supplemental to the Standard Specifications and form part of the Contract. In the case of conflict between the Standard Specifications and Special Provisions, the latter shall govern, unless otherwise stated. The Contract

Drawings will supersede the Special Provisions and Standard Specifications.

1.4 TIME OF COMPLETION

The date by which the work to be performed under this contract is to be completed shall constitute the contract completion date. The County and Contractor shall be given a total of two hundred seventy (270) consecutive calendar days from the

Notice-to-Proceed date plus any contract time extensions awarded by the County in which to complete all work to a point of substantial completion as deemed by the County. The project shall be considered substantially complete upon the substantial completion inspection and subsequent approval by the Charles County Planning and Growth Management (PGM).

All work completed under this Contract shall be guaranteed by the Contractor to remain as accepted and functional for one (1) year, beginning at the date of final acceptance by the County.

1.5 LIQUIDATED DAMAGES

Time is of the essence for the completion of this project. In accordance with the General Provisions, the County shall, at its discretion, assess liquidated damages in the amount as determined by the County to be the actual cost incurred by the County as a result of the project being extended beyond the contract completion date as defined in Section 1.4 - Time of Completion of these Special Provisions. The amount of liquidated damages shall not exceed $500 per day.

2.0 SCOPE OF SERVICES

The Scope of Services for this project includes all direct and incidental work necessary to perform the work as described in this solicitation. The Contractor shall not commence work under the Scope of Services prior to receiving a written notice from the

County. The notice will only be in the form of an official Notice-to-Proceed (NTP) letter from the Department of Public Works.

Any other form of authorization for the start of work on this project does not constitute approval by the County.

These Specifications and the Contract Drawings are intended to cover a complete project. It should be distinctly understood that failure to mention any work which would normally be required to complete the project shall not relieve the Contractor of his responsibility to perform such work. There will be no separate payment by the County for performing tasks within the

Scope of Services. The cost associated with these items shall be considered incidental expenses and included in the Base

Bid Item A1.

2.1 PRE-CONSTRUCTION VIDEO

Upon receiving the NTP and prior to mobilizing to the site, the Contractor shall conduct a thorough site video inspection of the project area(s) and document the site and any other areas that may be affected by the proposed construction including, but not limited to public and/or private lots, roadways, buildings, landscaping, utilities, and other permanent items. The County shall be notified 48 hours prior to the scheduled video recording of the site and will have a representative present to identify other areas that may be affected by the proposed construction. A copy of the pre-construction site video shall be provided to the

County, in a digital format acceptable by the County, prior to mobilization. The Contractor shall be responsible for the repair, replacement and/or reconstruction of any property destroyed or damaged as a result of their negligence. All claims will be verified by the County through the video record log of the area.

2.2 MOBILIZATION/DEMOBILIZATION

The Contractor shall mobilize and begin work within fourteen (14) days of the date on the NTP letter. Mobilization shall include, but is not limited to, any required surveying and stakeout, any required traffic control signage, equipment delivery, material delivery, and delivery of tools, and all requirements as specified in Section 01100 of the Charles County

Government’s Department of Planning & Growth Management’s Standard Specifications for Construction.

At the completion of the project, the Contractor shall demobilize all equipment, tools, traffic control signage, materials, etc.

that are not part of the permanent construction and/or authorized by the County to remain on site, including the access road.

All areas shall be returned to their pre-disturbed or better condition.

2.3 PROJECT SCHEDULE

Upon receiving the Notice of Award (NOA) letter from the County, the Contractor shall begin developing a project schedule to be submitted to the County for review and acceptance at or before the project’s Pre-construction Meeting. The schedule shall be prepared utilizing the Critical Path Method (CPM) and shall break down each bid item task into manageable and measurable subtasks. The schedule shall be monitored throughout the duration of the contract and shall be updated prior to each progress meeting, with copies provided by the Contractor to each meeting attendee for review and discussion. The schedules shall be prepared in a manner that front loads concentrated work efforts and reserves time to deal with unforeseen difficulties, and still meet the allotted timeframe for completion.

2.4 PERMITS

Permits for the work to be performed under this contract have been received by the County. The Contractor shall adhere to all conditions, requirements, and regulations required by permits from Charles Soil Conservation District (SCD), Maryland

Department of Environment (MDE), United States Army Corps of Engineers (USACE), State Highway Administration (SHA), and Charles County’s Codes, Permits, and Inspection Services Division (CPIS). Any additional permits that are required will be obtained by the Contractor at their sole expense. The Contractor shall request all permits needed from the County and accept transfer of responsibility for all existing permits and associated terms, conditions, and restrictions as appropriate. The

Contractor will not be responsible for renewing the existing permits granted by SCD, MDE, USACE, SHA, or CPIS throughout the duration of this project. The Contractor shall complete the Transfer of Authorization Form thru the e-transfer on MDE’s website. A copy shall be submitted to Charles County for approval prior to starting any work.

2.5 EQUIPMENT AND MATERIAL SUBMISSION

Equipment and material shall comply with the Charles County Government’s Department of Planning & Growth

Management’s Standard Specifications for Construction. The Contractor shall also provide a Certificate of Compliance for each material and equipment stating that the equipment and/or materials fully comply with the requirements of this contract.

Prior to ordering and/or delivery, the Contractor shall submit for review and approval to the County or its authorized representative(s), all sources from which the Contractor proposes to obtain equipment and materials. Furthermore, prior to installation or use, the Contractor shall submit for approval the product data for all equipment and materials to include, but not be limited to, the compaction testing equipment, concrete, stone, select fill, drainage structures/ piping, reinforcing steel, retaining wall material(s), fencing, etc.

2.6 EROSION AND SEDIMENT CONTROL

The Contractor must install erosion and sediment (E&S) control measures as shown on the Contract Drawings, or as otherwise required by the regulations. The Contractor shall maintain all E&S measures throughout the duration of the Contract. All E&S measures shall be in accordance with the Charles County Government’s Department of Planning & Growth Management’s

Standard Specifications for Construction and must adhere to any other federal, state, and local rules and regulations regarding erosion and sediment control including the 2011 Maryland Standards and Specifications for Soil Erosion and Sediment

Control, and any updates to the handbook. The Contractor shall provide and make access available to all regulatory agencies having jurisdiction over erosion and sediment control and assist as necessary in the inspection of all E&S measures installed on this project by the Contractor.

2.7 GEOTECHNICAL TESTING

The Contractor shall obtain the services of a 3rd party geotechnical inspection firm to perform testing on materials if required.

Testing requirements shall be in accordance with applicable sections of the Charles County Government’s Department of

Planning & Growth Management’s Standard Specifications for Construction. Tests shall be performed, but not be limited to, the following: foundations, reinforcing steel, select fill material, trench backfill, concrete, preparation of subgrades, etc. The

Geotechnical field representative shall verify that the soil bearing capacity at subgrade and bottom-of- footing meets minimum bearing specified and required.

The conditions indicated by soil borings as specified on the Contract Drawings apply only at the specific location of each boring at the time that the borings were made. It is the responsibility of the Contractor to verify conditions to their satisfaction. The

Owner and Design Consultants assume no responsibility whatsoever in respect to the sufficiency of accuracy of these investigations, and there is no warranty or guarantee that conditions other than those identified by the subsurface investigation will not be encountered.

2.8 PROJECT COORDINATION

The Contractor shall coordinate with all applicable County staff and utility companies having jurisdiction, stake, or vested interest that could or may be affected by this project. The Contractor must notify the affected parties prior to starting and at the completion of their work affecting the party’s vested interest. The Contractor shall maintain reasonable access to allow these parties to perform their duties as it relates to their respective jurisdiction, facilities, and property.

2.9 PROJECT MEETINGS

The Contractor is required to attend periodic meetings throughout the duration of the Contract.

2.9.1 Pre-Construction Meeting

The Contractor shall attend a project pre-construction meeting at the County prior to starting any work. The Contractor shall coordinate with the County’s Capital Services Division for the date and time of this meeting and to provide items of discussion for the agenda. The County will provide the agenda and chair the meeting while the Contractor shall be responsible for keeping a record of the meeting and provide meeting notes to the County for review and acceptance within one week following the meeting. The Contractor must provide at least four (4) copies of the initial project CPM schedule and be prepared to answer any questions pertaining to the prepared schedule.

2.9.2 Site Meeting

The Contractor shall coordinate with the County, all applicable regulatory agencies and utility companies to schedule a site meeting prior to start of work, and periodically as needed throughout the course of the project. The purpose of the site meeting is to provide an opportunity to discuss the effects the construction will have on each agency or company’s area of jurisdiction.

2.9.3 Bi-Weekly Progress Meetings

In an effort to keep the project on schedule, to review the progress of construction, and to discuss pertinent project issues, the Contractor shall be prepared to meet at the site, or at the Department of Public Works office on Audie Lane, on a bi-weekly basis at an agreeable time and day during the work week.

The Contractor shall chair all Progress Meetings and provide an agenda for the meetings to the County at least 48 hours prior to the scheduled time of meeting. The Contractor shall keep record of each meeting and submit copies of the meeting notes to the County for review and comment within one (1) week following the meeting. In addition to the agenda, the Contractor shall provide a verbal status update, an updated project schedule, and copies of the previous meeting’s notes.

2.10 INVOICES

The Contractor shall submit monthly invoices on the County’s standard invoice form for payment of work performed. Fourteen

(14) days prior to submitting the 1st monthly invoice, the Contractor shall submit a Schedule of Values to the County for review and approval. The Schedule of Values shall contain a cost breakdown of the construction items shown on the Bid Form and shall be consistent with the activities identified on the approved project schedule. Payment of invoices by the County shall be in accordance with the Section 5 - General Provisions contained within the Project Documents

Each month the County will pay to the Contractor the Contract value of work satisfactorily performed during the preceding calendar month, less 5% of the estimated amount until final completion and acceptance of the work. The retainage shall be held for the one (1) year warranty period. Reduction of the retainage to less than 5% shall be at the sole discretion of the County.

Consistent with satisfactory performance of final payment requirements and County acceptance of the project subsequent to the conclusion of the warranty period, final payment will be processed as appropriate.

2.11 AS-BUILT AND RECORD DRAWINGS

The As-built and Record Drawings shall be prepared by the Engineer-of-Record and paid for by the County. As work progresses, the Contractor shall coordinate with the County and Engineer-of-Record to document all as-built information of the construction. At the completion of work, and prior to substantial completion inspection, redline drawings or draft as-built drawings shall be submitted to the County by the Contractor for review and approval. Final Inspection will not be performed until the redlined drawings or draft as-built drawings have been provided by the Contractor and approved by the County. If an item is determined to not be constructed per the approved plans, corrective actions shall be taken by the Contractor to rectify the discrepancy.

2.12 ADDITIONAL MAINTENANCE BOND FOR LANDSCAPING

In addition to the one-year guarantee that is specified in the General Provisions, the Contractor must also guarantee that plant survival will be in accordance with the following requirements.

1. For stormwater management plants and shrubs as shown in permitted drawings and on the planting schedules on the Contract Documents- 85% survivability is required for an additional two-year period beyond the initial one-year guarantee period.

2.13 CLOSEOUT DOCUMENTS

Upon completion of all work related to this project, the Contractor shall complete and submit to the County the closeout documents provided in the Appendices of this solicitation. If required, the Contractor shall make any modifications to the forms and information provided with the closeout documents at no additional cost to the County.

2.14 SPECIAL INSTRUCTIONS TO THE CONTRACTOR

1. The Contractor, before submitting a proposal for this project, shall visit the construction site and thoroughly familiarize themselves with all existing conditions above and below ground.

2. The Contractor shall satisfy themselves as to the accuracy and completeness of these Project Specifications and

Contract Documents regarding the nature and extent of all work described.

3. Because of the proximity to private property and natural resources including trees and wetlands, the Contractor shall exercise extreme care in their construction operations. All work must be kept within the “Limits of Disturbance” as shown on the Contract Drawings.

4. The Contractor shall secure the written approval of the County at the Pre-construction Meeting for the particular place(s) of storage of materials and equipment, etc., prior to beginning work. All work must be kept within these limits and within the “Limit of Disturbance” (LOD), as shown on the Contract Documents.

5. The existing topography shown on the Contract Drawings was correct when surveyed. However, the Contractor shall satisfy themselves as to all conditions at the time of bidding this project and include in their proposal any changes that would be necessary to accomplish a complete and functional project. The Contractor will only be permitted to bring discrepancies in earthwork quantities to the attention of the County at the time of bidding. After Award of Contract, payment for earthwork operations will be considered fixed.

6. Should there be any discrepancies between Contract Documents, and/or field conditions after bidding and prior to the beginning of work, the Contractor shall bring such discrepancies to the attention of the County, or their representative, at the work initiation conference.

7. If, between the time Contract Documents were developed and construction is to begin, it is determined that interim erosion has occurred, the proposed structure alignment may be adjusted, with the approval of the County and at the direction of the Engineer, to conform to the existing conditions as proposed by the Contract Documents. The intent is to maintain the relationships between the existing stormwater facility and the proposed location of project components as those shown on the Contract Documents.

8. Due to the accumulated erosion carried onto the stormwater facility, existing conditions, shall be expected to deviate within reason from those depicted on the Contract Documents. The Engineer will provide suggestions on how to accommodate changed site conditions as the work progresses. Suggestions from the Engineer will not constitute change orders. There will be no change in the Contract for differences between the Plan Documents and actual existing grade and the locations of stormwater facility embankment stabilization techniques relative to the Plans.

9. The Contractor shall use the horizontal and vertical survey control points shown on the Contract Documents to layout the lines of work, stakeout the location of all proposed structures, and test the levels of all construction. No other datum or control points will be accepted.

10. The Contractor shall take all necessary precautions and measures to protect the property from damage. They will repair all damage caused by their operations to all public and private property, including but not limited to roads, paths, utilities, drains, trees, shrubs, etc., and leave the property in a condition at least equivalent to the condition found prior to construction activities.

11. The Contractor shall at all times keep the premises free from accumulation of waste materials and rubbish, debris, mud carried by any equipment entering and outgoing from the facility, etc., and shall leave the work area completely clean.

12. The work under this Contract includes all necessary temporary items required for good, safe, and sanitary construction practice and administration of the project. These requirements are subject to the approval of the County.

13. Prior to construction the Contractor shall conduct a general cleanup of the site to include trash and other debris and shall dispose of spoil to an approved area off the project site.

14. Excess and unsuitable materials resulting from the proposed construction shall be hauled off the project site and taken to an approved disposal area at the Contractor’s expense. Invasive plants excavated invasive plant root material, and surrounding topsoil must be deposited at a licensed landfill facility.

15. Access to the project site shall be via Council Oak Drive as shown on the approved Contract Drawings. The County shall be notified 48 hours before the commencement of work and prior to each successive stage of work.

16. The Contractor shall verify horizontal and vertical locations of all existing utilities. They will provide adequate means of protection during earthwork operations. Should uncharted or incorrectly charted piping or other utilities be encountered during excavation, consult the County immediately for directions as to procedure. Cooperate with the

County and the utility companies in keeping respective services and facilities in operation. Repair damaged utilities to satisfaction of the County and the affected Utility at no cost to the County. Do not interrupt existing utilities serving facilities occupied and used by the County or others.

17. The Contractor is responsible to make all necessary notifications required by the Contract Drawings, specifications and permits. This shall include, but not be limited to, notifying Miss Utility (1-800-257-7777) to identify any utilities on the site before starting work. Written notification is to be made ten (10) days prior to starting work.

18. The Contractor shall maintain suitable traffic safety signs, equipment, and manpower to provide traffic control as required by the County. The Contractor shall provide all labor and equipment to maintain and keep the roadways and other paved areas, including the parking lots, free of dirt and/or debris as specified and as directed by the County.

19. The Contractor shall be fully and solely responsible for the protection of the public from any construction activities or unfinished work areas. The Contractor shall erect barricades and post warning signs indicating that the construction area is restricted to Contractor personnel only.

2.15 PROJECT SIGN

The County will provide project information sign(s) upon issuance of the Notice-To-Proceed (NTP). Sign sizes are approximately 5'x8' or 6'x10', or a combination of both. Wood posts, supports, and mounting hardware will not be provided by the County. The Contractor shall pick up the sign from the County’s office located at 10430 Audie Lane, La Plata, Maryland

20646.

Before work starts, the Contractor shall install the project information sign(s), adequately supported by a minimum of two 4" x 4" wood posts and supports to withstand normal wind loads. The County and the Contractor will coordinate suitable location(s) for the project sign(s). The project sign(s) shall be located to ensure suitable visibility, and to provide adequate sight distance for traffic when placed at or near intersections. Lights, flags, or other devices will not be permitted to be attached to the signs or posts.

The Contractor shall be responsible for the maintenance, repair, and upkeep of signs for the duration of the project. Signs shall be cleaned as necessary to maintain readability. The condition of signs when furnished to Contractor will be documented by the County and will be use as a reference to determine damage other than normal wear and tear. If damage, beyond normal wear, occurs to the sign during shipment to and from the site, or during the course of construction, it shall be replaced by the

County at the Contractor’s expense.

Upon completion of the project, the Contractor will remove and return sign(s) to the County to the location from which they were retrieved. The Contractor will coordinate delivery with the County.

3.0 SCOPE OF WORK

The Contractor shall not commence construction activities under the Scope of Work prior to receiving a written notice from the County. The notice will only be in the form of an official Notice-to-Proceed letter from the County’s Department of Public

Works. Any other form of authorization for the start of work on this project does not constitute official approval by the County.

The Scope of Work for this project includes, but is not limited to, the furnishing of all coordination, scheduling, supervision, labor, tools and equipment, jobsite investigations, materials and supplies, incidentals, appurtenances, and mobilization required to perform the work in accordance with the contract documents. Specific work tasks include, but are not limited to stormwater management restoration practices as; excavation of the existing stormwater management facility, removal of all bio waste and install a new stormwater management wet pond facility complete with all designed plantings, gravel, rip rap, mountable berm, rock inlet and outlet protection, gabion wall forebay, principal spillway, removal and disposal of twin 30” pipes, installation of prefabricated bridge, excavation, haul/or dispose of excess material, removal of Type J inlet and installation of Type K inlet, and any and all designed elements described in the Contract Drawings. Work shall also include, but is not limited to, the installation of aquatic safety and bench, tree and shrubs clearing and grubbing, landscaping, installation and maintenance of temporary traffic control devices, construction entrance installation and demolition, restoration and stabilization of all disturbed areas, installation and maintenance of sediment control devices, maintenance incidentals necessary to perform the work as designed and approved for this project and provided under this Contract. The Contractor will also be responsible for maintaining a safe work site which may include the installation of 4’ temporary safety fencing to keep pedestrians from entering the construction site.

All work shall be in accordance with the Contract documents provided in Appendices of this solicitation, the Charles County

Department of Planning and Growth Management’s Standard Specifications for Construction, the MDE Permits for the project, the Charles County Soil Conservation District, and all other applicable requirements of the County, the Maryland

Department of the Environment, and any other regulatory authority having jurisdiction to control, limit or otherwise regulate the work performed under this Contract.

The project shall be considered substantially complete if all proposed structures have been installed, and earthwork operations are complete, and when the site has been permanently stabilized and planted; and upon the completion of substantial completion inspections by the Charles County Codes, Permits and Inspection Services (CPIS) Department.

3.1 BASE BID ITEMS

3.1.1 Base Bid Item A1 -NPDES: White Oak Village Pond Retrofit

The Contractor shall furnish all labor, material, equipment, tools, and permits to coordinate, plan, and execute the work shown in accordance with the contract documents (including Appendix B & C) except landscaping. Landscaping is covered under

Base Bid Item A2.

Payment – Base Bid Item A1 of the Bid Form establishes the lump sum price for which payment will be made by the County to the Contractor based on the schedule of values for worked performed under this bid item.

3.1.2 Base Bid Item A2 -Landscaping

The Contractor shall furnish all labor, material, equipment, and tools to install landscaping according to the contract documents

(Appendices).

Payment – Base Bid Item A2 of the Bid Form establishes the lump sum price for which payment will be made by the County to the Contractor.

3.1.3 Base Bid Item A3 -Pipe Anchors

The Contractor shall furnish all labor, material, equipment, and tools to install and test pipe anchors. The installation of the pipe anchors shall comply with the detail in Section 4.3 herein. All materials to be used for pipe anchors shall be approved by the Consultant Engineer prior to installation.

Payment – Base Bid Item A3 of the Bid Form establishes the lump sum price for which payment will be made by the County

3.1.4 Base Bid Items A4 -Maintenance Bond: Additional Two-Year Extended Landscaping Maintenance

The Contractor shall provide the County with a Maintenance Bond for Additional Two-Year Extended Landscaping

Maintenance per the requirement specified in the Project Notes -Paragraph No. 6 of Sheet #C-001 (Appendix B - Drawings).

This additional Maintenance Bond must cover 85% of all landscaping costs listed in Bid Item A2.

Payment – Base Bid Item A4 of the Bid Form establishes the lump sum price for which payment will be made by the County

3.2 CONTINGENCY ITEMS

3.2.1 Contingency Item B1 – Additional Excavation

Only when authorized by the County, due to unforeseen adverse conditions below the visible surface the Contractor shall provide all coordination, scheduling, supervision, labor, equipment, materials, incidentals and appurtenances, excavation, hauling from site, testing of unsuitable or contaminated materials if necessary, and offsite disposal of the additional excavated material as needed to remove material unsuitable for the work effort. The removal shall be classified as Class 3A Excavation as identified in Section 02550.03D of the Charles County Government’s Department of Planning and Growth

Management’s Standard Specifications for Construction Manual and shall comply with all other applicable requirements of the County, the Maryland State Highway Administration (SHA) and any other regulatory agency having jurisdiction to control, limit or otherwise affect the additional excavation, transport and disposal of the material.

Payment - Contingency Item B1 of the Bid Form establishes the unit price for which payment by the County will be made based upon the number of cubic yards (CY) excavated, as authorized by the County and implemented by the Contractor in accordance with the Contract Documents. Excavation and removal of unsuitable material above the proposed subgrade elevation is included in the lump sum installation price for the wet pond facility and outfall improvements and should not be considered as additional excavation or undercut. Payment will only be made with the approval of the County. The payment will be full compensation for all excavation, handling, storage, offsite disposal and required testing all materials, labor, equipment, tools, and incidentals necessary to complete the work as specified in the Contract Documents, or by the County.

3.2.2 Contingency Item B2 – Furnished Topsoil

Only when authorized by the County, the Contractor shall furnish, place, and test as required additional furnished topsoil. The furnished topsoil shall conform to the requirements of Section 02813 of Charles County Government’s Department of

Planning and Growth Management’s Standard Specifications for Construction Manual and shall comply with all other applicable requirements of the County, the Maryland State Highway Administration (SHA) and any other regulatory agency having jurisdiction to control, limit or otherwise govern the furnishing and placement of topsoil. When requested by the

County, the Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B2 of the Bid Form establishes the unit price for which payment by the County will be made based upon the number of cubic yards (CY) furnished topsoil, as authorized by the County, and installed by the Contractor in accordance with the Contract Documents. Payment will only be made with the approval of the County. The payment will be full compensation for all furnishing, placing, and required testing of topsoil and all materials, labor, equipment, tools, and incidentals necessary to complete the work as specified in the Contract Documents, or by the County.

3.2.3 Contingency Item B3 – Select Fill

Only when authorized by the County, the Contractor shall furnish, place, compact, and test as required additional select fill material in accordance with Section 02245 of the Charles County Government’s Department of Planning and Growth

Management’s Standard Specifications for Construction Manual, and shall comply with all other applicable requirements of the County, the Maryland State Highway Administration (SHA), and any other regulatory agency having jurisdiction to control, limit or otherwise govern work under this bid item. When requested by the County, the Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B3 of the Bid Form establishes the unit price for which payment by the County will be made based upon the number of cubic yards (CY) authorized by the County and installed by the Contractor in accordance with the

Contract Documents. Select Fill as required by the project drawings shall be included in the lump sum price for Base Bid Item

A-1 and shall not be considered as additional Select Fill.

3.2.4 Contingency Item B4 – Class I Riprap

Only when authorized by the County, the Contractor shall furnish, and place as required additional Class I Riprap material.

Class I Riprap shall comply with the requirements of Section 02295 of Charles County Government’s Department of

Planning and Growth Management’s Standard Specifications for Construction and Appendices – Specifications, Section

13.0 – Riprap. When requested by the County, the Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B4 of the Bid Form establishes the unit price for which payment by the County will be made based upon cubic yards (CY) of Class I Riprap authorized by the County and placed by the Contractor in accordance with the

Contract Documents. Class I Riprap shall be placed with a standard thickness of 19 inches. The payment will be full compensation for all furnishing, placing, and required testing and all materials, labor, equipment, tools, and incidentals necessary to complete the work as specified in the Contract Documents, or by the

3.2.5 Contingency Item B5 – Aggregate No. 57 Stone

Only when authorized by the County, the Contractor shall provide all coordination, scheduling, supervision, labor, equipment, material, incidentals and appurtenances, delivery, and placement of No.57 stone in the area(s) of this project as designated by the County. The material shall comply with Section 901 (Aggregates) of the Maryland State Highway Administration’s

Standard Specifications for Construction and Materials. Upon request by the County, the Contractor shall provide documentation on the proposed material verifying that the material meets applicable requirements.

Payment - Contingency Item B5 of the Bid Form establishes the unit price for which payment by the County will be made based upon the number of tons (TN) authorized by the County and placed by the Contractor in accordance with the Contract

Documents. Aggregate No. 57 Stone as required by the project drawings shall be included in the lump sum price for Base Bid

Item A-1 and shall not be considered as additional required Aggregate.

3.2.6 Contingency Item B6 – Misc. Mix. 2 Concrete

Only when authorized by the County, the Contractor shall furnish, and place as required additional Misc. Mix. 2 Concrete.

Misc. Mix. 2 Concrete shall comply with the requirements of Section 03310 of Charles County Government’s Department of Planning and Growth Management’s Standard Specifications for Construction. When requested by the County, the

Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B6 of the Bid Form establishes the unit price for which payment by the County will be made based upon cubic yards (CY) of Misc. Mix. 2 Concrete authorized by the County and placed by the Contractor in accordance with the Contract Documents. The payment will be full compensation for all furnishing, placing, and required testing and all materials, labor, equipment, tools, and incidentals necessary to complete the work as specified in the Contract Documents, or by the County.

3.2.7 Contingency Item B7 – Non- Woven Geotextile Fabric

Only when authorized by the County, the Contractor shall provide all coordination, scheduling, supervision, labor, equipment, materials, documentation, incidentals and appurtenances, delivery, and placement of Non-Woven Geotextile Fabric Material in the area(s) of this project as designated by the County. The material shall comply with Section 919 (Geotextiles) of the

Maryland State Highway Administration’s Standard Specifications for Construction and Materials, and the specifications of the approved plan. When requested by the County, the Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B7 of the Bid Form establishes the unit price for which payment by the County will be made based upon the number of square yards (SY) authorized by the County and placed by the Contractor in accordance with

Section 02295.02.C.4 of Charles County Government’s Department of Planning and Growth Management’s Standard

Specifications for Construction Manual. Non-Woven Geotextile Fabric as required by the project drawings shall be included in the lump sum price for Base Bid Item-A-1 and shall not be considered as additional required fabric.

3.2.8 Contingency Item B8 – Hiker-Biker Path

Only when authorized by the County, the Contractor shall remove and dispose the existing hiker-biker path and furnish and install a new hiker biker path complying with Charles County Government’s Standard Detail R/2.47 for Pedestrian Travel

Ways and Section 02641 of the Charles County Government’s Department of Planning and Growth Management’s

Standard Specifications for Construction for Bituminous Concrete Pavement application. When requested by the County, the Contractor shall provide documentation on the proposed material verifying that the material meets the requirements.

Payment - Contingency Item B-8 of the Bid Form establishes the unit price for which payment will be made by the County based upon the linear foot (LF) hiker-biker trail demolition and installation authorized by the County.

4.0 SUPPLEMENTAL INFORMATION

4.1 VICINITY MAP

4.2 TRANSFER OF AUTHORIZATION FORM

TRANSFER OF AUTHORIZATION

MARYLAND DEPARTMENT OF THE ENVIRONMENT

1800 Washington Boulevard - Baltimore Maryland 21230

(410) 537-3000 - 1-800-633-6101 - http://www.mde.state.md.us

TRANSFER OF AUTHORIZATION

This Transfer of Authorization form is to be completed by a permittee who has applied for coverage under the General Permit for Construction Activity, in accordance with the Environmental Protection Agency’s

National Pollutant Discharge Elimination System stormwater program, if the permittee intends that another person assume control of permitted activities on the site or if the site’s ownership changes. In this event, the permittee (the “transferor”) must familiarize the person who is assuming control of the permitted activities

(the “transferee”) with the program and provide the transferee with a copy of the General Permit. The transferor and transferee must both sign this form. The completed forms should be submitted by the transferor to the Maryland Department of the Environment, WMA - Compliance Program, Montgomery

Park Business Center, 1800 Washington Boulevard, Suite 420, Baltimore, Maryland, 21230.

NOI Identification Number (if assigned):

Name of Transferor/Permittee:

Address of Transferor/Permittee

Site Name and Location (description, including County and mailing address if available):

Name of Person to Whom Coverage is Being Transferred (i.e., Transferee):

Address of Person to Whom Coverage is Being Transferred:

Phone Number of Person to Whom Coverage is Being Transferred:

Name and Phone Number of Contact Person:

I acknowledge this transfer of authorization under the terms of the General Permit. I understand that the named transferee on this form is now responsible for complying with the terms of the General Permit.

Transferor Signature and Date Transferee Signature and Date

Form Number MDE/WMA/COM0.15 1 of 1

Revision Date 03/01/2003

TTY Users 1-800-735-2258 http://www.mde.state.md.us/

4.3 PIPE ANCHOR DETAIL

4.4 R247 PEDESTRIAN PATH DETAIL

********END OF SPECIAL PROVISIONS*******