IFB25HHL019 Plans.pdf

STATE OF HAWAII

DEPARTMENT OF HAWAIIAN HOME LANDS

91-5420 Kapolei Parkway, Kapolei, HI. 96707

PLANS

FOR

FURNISHING LABOR AND MATERIALS FOR

WAIMANALO FLOOD CONTROL CHANNEL

IMPROVEMENTS PHASE 2

WAIMANALO, ISLAND OF OAHU, HAWAII

IFB No.: IFB-25-HHL-019

January 2025

Digitally signed by Ather Dar

Date: 2024.06.17

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11/16/24

Willard Nishigata

A2024-06-0601 by ATHER R. DAR

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Digitally signed by

Ather Dar

Date:

2024.06.20

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11/16/24 by Ather R. Dar Date:

2024.06.20 09:09:36-10'00'

11/16/24 by Ather R. Dar Date:

2024.06.20 09:09:36-10'00'

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Rev. 11/7/2022

City and County of Honolulu

Appendix B Erosion and Sediment Control Plan Small Project Template for Categories 1A, 1B and 2

Construction Site Project Name:

Physical Site Address:

Building Permit Application Number:

Disturbed Area (square-feet) *:

*Disturbed area includes the project area, construction access on unpaved surfaces, and storage/ staging area(s).

Instructions:

Use this template to prepare an Erosion and Sediment Control Plan (ESCP) for projects under the City and County of Honolulu, Department of Planning and Permitting (DPP) Categories 1A, 1B, and 2. This ESCP may be prepared and must be signed by the property owner or an authorized agent designated by the owner. Submit a completed ESCP with the building permit application and always keep a copy of the approved ESCP on the job site.

Any changes to the approved ESCP must be approved by the DPP. Refer to the guidance booklet “How to Prepare Erosion and

Sediment Control Plan for Small Construction Projects” available on DPP’s Storm Water Quality (SWQ) website for more information on each BMP below.

PART 1: BMP Selection - Select the BMPs which will be used at the site and if not used, provide a brief explanation for why it is not needed or impracticable for the site.

I.EROSION PREVENTION BMPs: practices that prevent erosion from occurring.

1. Permanent Stabilization (REQUIRED) Prior to closing of any permit(s) permanent stabilization must be in place which includes the following requirements:

• All exposed disturbed areas must be permanently stabilized with ground covering such as vegetation, gravel, or pavers;

• Rain gutters, downspouts, and channelized flows must be installed and functioning as designed;

• In seeded areas, grass or vegetation must cover at least 90 percent of the disturbed soils or must be temporary stabilized while it is growing;

• Temporary measures, such as sediment barriers, should be removed when permanent measures are in place;

• All paved surfaces must be clean; and

• Storm drain inlet filters must be removed after all cleanup activities have been completed.

2. Slope Management and Protection (Category 1B and 2 only) Areas disturbed on a slope greater than 15% must be protected when work is inactive for seven (7) days or more.

H

To find the slope, divide the vertical height of your slope by the horizontal length of your slope and multiply by 100. For example, if your slope measures 3 feet vertically, and 10 feet horizontally, your slope would be 3 / 10 X 100= 30%.

Check if will be used:

1. Rolled erosion control products ☐

2. Hydraulic mulch or hydroseed ☐

3. Hydraulic or bonded fiber matrix ☐

4. Planting and/ or vegetation providing at least 70% surface cover ☐

5. Other: (please specify): ☐

Provide an explanation on the next page when this “will not use” is checked: ☐ Will not use

APPROVAL (for official use only)

Approved by: ___________________

Date: __________________________

SWQR Job #: ___________________

V

DelilahLiccud Text Box Waimanalo Flood Control Channel Concrete Lining Phase 2 flung Typewritten Text

SWQR2024-07-2111

flung Typewritten Text 11/8/24

Appendix B

Rev. 11/7/2022

If Slope Management and Protection will not be used, provide brief explanation:

3. Temporary Stabilization (Category 1B and 2 only)

Use one or more of the following to protect disturbed areas that will not be worked on within 14 days:

Check if will be used:

1. Rolled erosion control products ☐

2. Hydraulic mulch or hydroseed ☐

3. Hydraulic or bonded fiber matrix ☐

4. Planting and/ or vegetation providing at least 70% surface cover ☐

5. Other: (please specify): ☐

☐ Will not use

If Temporary Stabilization will not be used, provide brief explanation:

II.SEDIMENT CONTROL BMPs: practices to prevent soil and sediment from leaving the project site and entering storm drains during rain events.

1. Perimeter Controls Sediment fences or barriers shall be used at the perimeter of all disturbed areas where there is potential for runoff to flow off the project site, Barriers may include gravel bags, sand bags, fiber rolls, silt fences, compost socks, or an equivalent BMP that intercepts runoff.

☐Will Use

☐Will Not Use

If this Perimeter Control will not be used, provide brief explanation:

2. Storm Drain Inlet Protection Inlet protection is required over storm drains that may receive runoff from your site unless those inlets drain to a sediment basin or trap. Inlet protection should be removed during severe storm events to prevent flooding.

☐Will Use

☐Will Not Use

If this Storm Drain Inlet Protection will not be used, provide brief explanation:

III.GOOD HOUSEKEEPING BMPs: practices that prevent pollution by limiting or reducing potential pollutants at their source.

1. BMP and Site Maintenance (REQUIRED) Regularly inspect and maintain BMPs to ensure continued performance.

2. Dust Control ( REQUIRED FOR FULL OR PARTIAL DEMOLITION OF STRUCTURES)

Use one of the following to control dust:

Check if will be used:

1. Mulching to a depth of one inch or more ☐

2. Sprinkling exposed soils with water to maintain moistness (Show temporary or permanent water sources on ESCP diagram. Indicate if water trucks will be on site.)

3. Vertical dust barriers ☐

☐ Will not Use

If Dust Control will not be used, provide brief explanation:

Do not anticipate delays of 14 days or more.

No storm drain inlet within 50 feet of the project site.

DelilahLiccud Text Box Will not generate dust.

Rev. 11/7/2022

3. Concrete Waste Management Conduct washout off-site or perform onsite in a designated area, away from water bodies, channels, or storm drains. Construct and maintain washout to contain all liquid and concrete waste generated.

☐Will Use

☐Will Not Use

If Concrete Waste Management will not be used, provide brief explanation:

4. Stockpile Management Locate stockpiles away from drainage ways or other areas of concentrated flows and within the property. Use a barrier around stockpiles and cover if they will not be actively used within seven (7) days.

☐Will Use ☐Will Not Use

If Stockpile Management will not be used, provide brief explanation:

5. Vehicle Tracking Control Restrict vehicle traffic to properly designated areas and remove sediment from vehicle tires prior to exiting the project site. All sediments that are tracked or discharged off-site must be swept or vacuumed at the end of each day.

☐Will Use ☐Will Not Use

If Vehicle Tracking Control will not be used, provide brief explanation:

6. Material Delivery, Storage and Use Management Minimize the storage of potential pollutants onsite, store materials in a designated area, and install secondary containment. Storage should be within the property. Do not store materials in buffer areas, near areas of concentrated flow, or areas abutting the City storm drainage system, receiving waters, or drainage improvements that discharge off-site.

☐Will Use ☐Will Not Use

If Material Delivery, Storage, and Use Management will not be used, provide brief explanation:

7. Spill Prevention and Control Keep ample supply of cleanup materials onsite and within the property. Clean up spills immediately, using dry clean-up methods where possible, and dispose of used materials properly.

☐Will Use

☐Will Not Use

If Spill Prevention and Control will not be used, provide brief explanation:

8. Solid Waste Management Provide designated waste collection areas for solid waste or construction and demolition waste, collect trash daily, and dispose at authorized disposal areas. Obtain street permit to locate outside property.

☐Will Use

☐Will Not Use

If Solid Waste Management will not be used, provide brief explanation:

9. Portable Toilets (Sanitary/ Septic Waste Management) Temporary and portable sanitary and septic waste systems shall be mounted or staked in, well-maintained and scheduled for regular waste disposal and servicing. Place it within the property.

☐Will Use ☐Will Not Use

If Portable Toilets (Sanitary/ Septic Waste Management) will not be used, provide brief explanation:

10. Liquid Waste Management BMPs

Rev. 11/7/2022

Contain liquid wastes in a holding pit, sediment basin, roll-off bin, or portable tank of sufficient volume to contain the liquid wastes generated. Place liquid waste management within property.

☐Will Use ☐Will Not Use

If Liquid Waste Management will not be used, provide brief explanation:

11. Vehicle and Equipment Cleaning, Fueling, and Maintenance Prevent pollutants in storm water from vehicle and equipment cleaning, fueling and maintenance by using off-site facilities when feasible, performing work in designated areas only, using spill pads under vehicles and equipment, checking for leaks and spills, and containing and cleaning up spills immediately.

☐Will Use

☐Will Not Use

If Vehicle and Equipment Cleaning, Fueling, and Maintenance will not be used, provide brief explanation:

12. Hazardous Waste Management Prevent or reduce the discharge of pollutants to storm water from hazardous waste through proper material use and waste disposal.

☐Will Use

☐Will Not Use

If Hazardous Waste Management will not be used, provide brief explanation:

13. Contaminated Soil Management Contain contaminated material soil by surrounding with impermeable lined berms or cover exposed contaminated material with plastic sheets. Contaminated soil should be disposed of properly in accordance with all applicable regulations.

☐Will Use ☐Will Not Use

If Contaminated Soil Management will not be used, provide brief explanation:

DelilahLiccud Text Box Will not generate hazardous waste.

DelilahLiccud Text Box No known contamination at site.

Rev. 11/7/2022

PART 2: ESCP Certification – Provide a wet signature to agree to the below. If the owner would like to designate an Authorized Agent, please provide the “Authorized Agent Designation Letter” with the submission of this

Appendix/or ESCP. The letter is available on DPP’s Storm Water Quality (SWQ) website.

ESCP CERTIFICATION

1) By signing, you acknowledge that erosion prevention, sediment control, and good housekeeping BMPs in this ESCP are mandatory conditions of your building and/or grading permit and are subject to inspection and enforcement by the

Department of Planning and Permitting, in accordance with Section 20-3-7 of the Rules Related to Water Quality.

2) If the proposed land disturbing work will be performed in the city sidewalk or right-of-way and/or best management practices installed in the sidewalk area (area between the property line and edge of pavement), the owner is responsible for obtaining a Permit for Street Usage from the Department of Transportation Services, 650 S. King

Street, 2nd Floor, Honolulu, Hawaii, 96813.

3) The owner is responsible for installing appropriate barricades, flashers, and signage for pedestrian and vehicular safety, and removing the inlet protection(s) before a storm event to prevent flooding of the road and after the project site is completely stabilized.

Owner / Authorized Agent Name* *Provide Letter Authorizing Agent Form if different from the Owner

Owner Signature Date

Check this box to designate the person below to be the ESCP Coordinator. If this box is checked, do not submit

Appendix A, unless revising or adding a new ESCP Coordinator to inspect this project.

ESCP Coordinator Name** ** Provide if the ESCP Coordinator is different from the Owner or Authorized Agent.

ESCP Coordinator Signature Date

ESCP Coordinator Certification # Address Line 1 (Street address)

ESCP Coordinator Email Address Line 2 (Apartment, suite, unit, building, floor, etc.)

ESCP Coordinator Phone # City, State, ZIP Code

DelilahLiccud Model

Rev. 11/7/2022

PART 3: Project Schedule - Use the table below or attach a separate project schedule to this ESCP. Project schedules must establish a sequence of all planned actions and activities on the project site, including, but not limited to, all land disturbing activities, the implementation of the BMPs identified in the project ESCP, scheduled inspections and maintenance of BMPs, and the removal of temporary BMPs. (i.e. install BMPs – 1 day, clear & grub - 2 days, construction – 2 weeks, stabilize disturbed areas – 1 day, remove BMPs – after vegetation is 90% establish.)

PROJECT SCHEDULE

Actions Timeline or Date

Notify the Department of Planning and Permitting of Project Start Date – Call 768-8132 or email dpp.npdes@honolulu.gov (Required)

2 weeks before starting work

RAIN RESPONSE PLAN

The following will be performed when severe rain is forecast:

• Temporarily suspend land disturbing activities including clearing, grubbing, grading and trenching.

• Inspect all BMPs and maintain as needed.

• Reinstall BMPs that were removed due to active work in the area.

• If a severe storm is expected, remove inlet protection devices to prevent flooding on surrounding streets.

• Cover or relocate material stockpiles and liquid material containers to avoid contact with rainwater.

• Place spill pans or oil-only spill pads under construction vehicles to prevent runoff from contacting any spilled petroleum products. Properly dispose of any accumulated oily water after the rain event.

• Re-inspect project site after the rain event and replace or maintain BMPs as needed.

Other: (please specify):

Rev. 11/7/2022

PART 4: Site Diagram - Provide a drawing of your site below or attach another map. Include the building outlines, property boundary or fence line, the limits of where your work will be located, flow arrows indicating direction of storm water runoff, location of BMPs, permanent or temporary water sources, and any storm drains within 50 feet of your property. All construction materials and equipment must be placed within the property, with the exception of dumpsters when a street usage permit is obtained.

SITE DIAGRAM

DelilahLiccud Snapshot

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CONSTRUCTION INGRESS/EGRESS

DelilahLiccud Callout

STAGING AREA

DelilahLiccud Rectangle

DelilahLiccud Ellipse

DelilahLiccud Ellipse

DelilahLiccud Callout

PORTABLE TOILET

DelilahLiccud Callout

STOCKPILE

DelilahLiccud Callout

CONCRETE WASHOUT

DelilahLiccud Callout

CONSTRUCTION INGRESS/EGRESS

DelilahLiccud PolyLine

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SANDBAGS AROUND WORK AREA

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SANDBAGS AROUND WORK AREA

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SANDBAGS AROUND WORK AREA

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RAMP ACCESS TO CHANNEL

DelilahLiccud Line

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FILTER SOCK WITHIN CHANNEL DOWNSLOPE OF DISTURBED AREAS

DelilahLiccud Rectangle

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DUMPSTER