C1547026_Scope_of_Work_Revised_4-14-2016.pdf

Scope of Work

Goat Canyon Sediment Basin Clean Out and Deposition Material Removal.

C1547026

Revised 4/13/2016

Work Location Address

Border Field State Park, 1500 Monument Road

San Diego CA 92154

See Figure 1

The Goat Canyon Sediment Basin complex (GCSB), managed by California State Parks (CSP, the State), is a sediment capture/retention facility located within Border Field State Park (BFSP), 1500 Monument Road, San Diego, CA 92154 (Figure 1); it captures cross-border run-off from

Mexico. The GCSB includes the Sediment Basins which consist of a concrete bottom in-canyon diversion structure that transitions into a flow-through sedimentation basin system of two earth bottom sedimentation retention basins in series. Additional infrastructure associated with the

GCSB includes the Processing Pad- a roughly 9-acre staging and work area designed to stage and process Deposition Material captured by and removed from the Sediment Basins, and Trash

Booms. Additional infrastructure also associated with the GCSB includes a system of access roads and routes, general staging areas, a water source, and other features.

The term “Sediment Basins” as used throughout this Contract is defined as the concrete bottom in-canyon diversion structure and the flow-through sedimentation basin system of two earth bottom sedimentation retention basins in series and associated concrete crossing and concrete outfall structures (see Figures 4-8).

The “Project Area” as used throughout this Contract is defined as the Sediment Basins, Processing Pad, a system of access roads and routes, general staging areas, a water source, and other features (see Figure 2).

The term “Deposition Material” as used throughout this Contract is defined as any material

(including sand, fines, cobble, rock, trash, tires, vegetation and other material), within the

Sediment Basins and the stockpiled material located on the Processing Pad. The Deposition

Material in the Sediment Basins originated from run-off from the last two years’ rainy seasons;

the Deposition Material on the Processing Pad originated from the Sediment Basins from previous years’ maintenance activities.

The term “Solid Waste” is used throughout this Contract to denote plastics, foam, lumber and construction debris, various types of textiles, vegetation, and miscellaneous trash. Solid Waste is present in discrete surface accumulations behind the Trash Booms, adjacent to fencing and vegetation, and at other locations in the GCSB. Solid Waste is also generally distributed throughout the surface and subsurface within the matrix of the Deposition Material. The

Deposition Material contains Waste Tires.

The Sediment Basins include two “Trash Booms”, which are floating debris barriers, and associated equipment and infrastructure, which consolidate trash as it flows through the

Sediment Basins.

The term “Waste Tires” is used throughout this Scope of Work to denote discarded vehicle tires or tire parts. The Contractor is not required to haul off Waste tires in this Contract; Waste Tires will be hauled by others with Waste Tire hauling certificates and through a separate funding source.

The Sediment Basins are capable of retaining approximately 60,000 cubic yards (cy) of

Deposition Material when full; it is estimated that approximately 20,000 cy of Deposition

Material is currently within the Sediment Basins. An estimated additional 80,00074,000 cy of

Deposition Material is staged in the Project Area on the Processing Pad. Past removal projects have demonstrated that the Deposition Material is typically composed of approximately 85% sand and fines, and 15% rock/cobble and Solid Waste, and an estimated 3,000 tires or tire shards, however the specific composition of the Deposition Material is unknown and may vary from these estimates.

There is very little industrial development in the upstream canyon, and therefore the probability of industrial pollutants is low. There is a potential for concentrated wastewater run-off, especially with surface flows or wet soils, associated with occasional failure of the sewage infrastructure in the canyon upstream. Material analysis from previous year’s maintenance activities is available upon request. (See attached: “2014 Goat Canyon Sediment Analysis” and “Goat Canyon Grain Size Fnl Rpt Apr07” ). Previous years’ analyses should be used as guidelines, as the material may vary year to year. This year’s material in the basins has not been tested. It is the responsibility of the Contractor to test this year’s material if that information is needed for disposal.

Contractor shall perform clean out maintenance of the Sediment Basins and haul-off Deposition

Material from the Processing Pad.

The bidder agrees to complete all work within 365 Calendar Days of Notice to Commence

(NTC). Details outlined below.

Details:

1. The Contractor shall un-hook the two Trash Booms (Figure 4) and pull them to the adjacent road way as directed by the CSP Representative prior to the removal of depositional material from the Sediment Basins. Upon completion of removal of depositional material, the Contractor shall replace the two Trash Booms.

2. The Contractor shall remove Solid Waste consolidated in discrete surface accumulations behind the two Trash Booms. The Contractor shall remove other readily accessible discrete surface accumulations of Solid Waste (e.g., along the drift fence and vegetation on the eastern Sediment Basin edge; in discrete piles trapped by vegetation.) The

Contractor shall dispose of this Solid Waste off-site in a properly permitted solid waste facility (i.e., landfill) in accordance with appropriate environmental regulations and policies.

3. The Contractor shall collect and stage all Waste Tires present in the Deposition Material removed from the Sediment Basin and all Deposition Material identified for haul-off. The

Waste Tires shall be staged in a discrete pile, or piles, relatively free of other Deposition

Material (i.e., sediment, rock, Solid Waste), at one of the GCSB staging areas as directed by the CSP Representative. The Contractor is not responsible for off-site disposal of

Waste Tires.

4. Deposition Material Removal: The Contractor shall remove 20,000 cy of Deposition

Material from the Sediment Basins and restore the Sediment Basins to original design grade (approximate). The Contractor may haul this Deposition Material to the adjacent

Processing Pad for temporary staging if Deposition Material haul-off is scheduled for future dates. Contractor shall not remove depositional material below original design grade of the basin(s). In the event that more than 20,000 cubic yards of Deposition

Material is in the Sediment Basins at the Project start date, the Contractor shall only be required to remove 20,000 cubic yards and that subset will be delineated by the CSP

Representative.

5. The Contractor may stage the Deposition Material on the Processing Pad within the limits of work. The Deposition Material shall be staged in a manner that it conforms to the

Deposition Material currently staged on the Processing Pad and in a manner that no

Deposition Material may erode from the processing pad with subsequent rains.

6. Deposition Material Haul-Off: The Contractor shall haul off-site, out of the Park, appropriate volume of Deposition Material, as determined through the competitive bid process (see Bid Form Exhibit B, Attachment I); haul-off and disposal of Deposition

Material shall be conducted in accordance with appropriate environmental regulations and policies. Conformance with all environmental regulations and policies for haul-off and disposal of Deposition Material is the responsibility of the Contractor. Contractor shall not dispose of Deposition Material within the Tijuana River Valley Disposal

Restriction Area (see Figure 3) unless the specific location is approved in writing by the

CSP representative - the goal of the GCSB complex and associated management is to capture and remove Deposition Material from the Tijuana River Valley. The Contractor must haul-off the appropriate volume of Deposition Material however, that Deposition

Material may originate from the Sediment Basins or the Processing Pad. Haul-off will be monitored by the CSP Representative.

7. The Contractor shall conduct topographic surveys of the Deposition Material in the

Sediment Basins and on the Processing Pad a minimum of three times throughout the project duration; these surveys, in conjunction with daily haul logs, shall be used to assess project progress and to determine progress payments.

a. Surveys shall be performed by a third party registered engineering surveyor.

Survey files shall be submitted electronically to the CSP Representative in

PDF and AutoCAD file formats.

8. The Contractor shall conduct topographic surveys of the Deposition Material in the

Sediment Basins and on the Processing Pad prior to any disturbance of the Deposition

Material, for the purpose of quantifying volumes present in both locations. The

Contractor shall provide these initial survey results to the CSP Representative prior to disturbing the Deposition Material. The Contractor shall conduct topographic surveys of the Deposition Material in the Sediment Basins and on the Processing Pad at the Project midpoint. The Contractor shall conduct topographic surveys of the Deposition Material in the Sediment Basins after removal is complete (by October 31, 2016). The Contractor shall conduct topographic surveys of the Deposition Material on the Processing Pad upon completion of all haul off activities. Original design grade drawings of the GCSB are available upon request. The Contractor shall review the approximate limits of work, as marked with stakes and/or flagging by the CSP Representative, during the mandatory pre-construction meeting with the CSP Representative.

9. The Contractor may utilize sorting equipment, and other equipment as needed and approved of by the CSP Representative, to process the Deposition Material for various beneficial uses, in order to assist with off-site beneficial re-use opportunities. With the exception of Waste Tires, the Contractor must haul off all products of any Deposition

Material sorting or processing as part of this Contract, unless specific agreements to leave a sorted product have been agreed upon in writing with the CSP Representative.

a. For example, cobble (4 inch diameter and larger) that has been sorted from the

Deposition Material and completely cleaned of trash and sediment may be considered an acceptable sorted product to leave. A conglomeration of sediment, cobble, and/or trash shall not be accepted. The southwestern edge of the Existing

Cobble Pile (see Figure 2) provides an example of sorted cobble that may be considered an acceptable sorted product however this must be agreed upon by the

CSP Representative as stated above. Cobble is considered to be Deposition

Material, until the Contractor chooses to sort, clean and leave it behind.

Leaving cobble is OPTIONAL, and not a requirement. If cobble is exported that volume shall contribute towards the Contractor’s export requirement. If cobble is left behind, that volume shall not contribute towards the

Contractor’s export requirement.

10. The Contractor must put protective measures in place to contain debris such as plastic and foam that may become airborne during the mechanical sorting of Deposition

Material. This windblown trash must be contained within the Processing Pad and kept out of surrounding vegetation. All debris generated from Deposition Material must be contained and removed from site.

11. The upper basin surface is typically dry when the contract begins, although subsurface material typically retains moisture. The lower basin retains more water and may not dry significantly. If water is present and this precludes excavation of the required volume, it is the Contractor’s responsibility to pump the water in order to facilitate excavation.

12. The Existing Cobble Pile (see Figure 2) within the Project Area is not considered

Deposition Material and shall be protected in Place.

13. The Contractor shall maintain a daily haul-log documenting deposition removal and haul-off progress. The haul log shall include the date, volume (cy) by haul vehicle, type of vehicle, load/unload time, number of loads per haul vehicle, total daily haul volume (cy), and location of disposal; this log shall be presented to the CSP Representative on a daily basis during hauling events throughout the duration of the Project. Contractor must submit corresponding haul log(s) with each invoice as specified to receive progress payments. Invoices shall include the date of activity, total daily haul or deposition removal volume (cy), disposal location, and grand total hauled or removed (cy).

14. Access routes to the Project Area in the Park are unpaved. Contractor is responsible for keeping dust levels associated with Project activity to a minimum. If CSP Representative deems dust levels associated with the Project unacceptable, the Contractor shall be responsible for implementation of appropriate dust control measures (e.g., water truck).

15. Utility (water) costs shall be the responsibility of the Contractor. CSP has a metered water source in the Project Area. However, use of that utility is dependent upon the establishment of a Contingent Fund between CSP and the Contractor for the purpose of paying for the water used by the Contractor. Contractor must meter water usage and develop necessary infrastructure to meet water needs. The Contractor shall report daily water usage to the CSP Representative in a Water Use Log. The Contractor shall pay for water used through a check made payable to CSP to be placed in the CSP Contingent

Fund.

16. The Contractor shall protect all GCSB facility elements, infrastructure, and area-associated cultural and natural resources (including vegetation not associated with

Deposition Material) in place. Approved routes of travel are represented on Figure 2.

Vegetation growing on the surface of the Deposition Material identified for haul-off shall be hauled off as part of the Deposition Material.

17. This Property and the City roads that access the Project Area are within a natural Park setting along the International Border with Mexico. Park visitors, recreationalists, equestrians, and Border Patrol agents and park maintenance activity are common throughout the area. The Contractor shall be responsible for maintaining a safe working environment in and around the Project Area with adequate signage, and flag-persons when needed. Haul trucks shall obey speed limits and rules of the road at all times. All vehicles shall yield to horses, especially on Hollister Street. “Yield to Horses” means that the vehicle must come to a complete stop until the horse has passed the vehicle by a safe distance.

18. This property belongs to State of California Department of Parks and Recreation. Other portions of this Contract specify further project conditions including Contractor liability for damage to GCSB facility elements, infrastructure, and area-associated natural and cultural resources.

19. The Contractor shall manage all elements of the task however work shall be done at the direction of the CSP Representative.

20. This Project is time sensitive. The Contractor shall start Deposition Material removal from the basins upon receipt of a Notice to Commence (NTC) letter. Exact dates shall be negotiated upon award to the contractor who is awarded this project. All Deposition

Material shall be removed from the basins by October 31, 2016. If significant rain occurs before then, and the Sediment Basins fill with additional Deposition Material, the

Contractor is still required to remove and haul-off the total volumes agreed to in this

Contract; however, the Contractor will not be required to return the Sediment Basins to original as-built grade. The Contractor shall complete all Deposition Material haul-off by within 365 Calendar Days from NTC.

21. CSP holds the required environmental permits and management planning documents for this Task.

22. The Contractor shall complete the Goat Canyon Sediment Basin Maintenance Close-out

Informational Survey and include this survey as part of their Final Report.

23. The Contractor is responsible to supply all equipment, materials, tools, labor, and incidentals as may be necessary to successfully complete the items of work detailed above.