Applicable Monitoring and Assessment Plan for Clean Water ......This Applicable Monitoring and Assessment Plan (AMAP) has been written to accompany a notification form seeking Project

Applicable Monitoring and Assessment Plan for Clean Water Act (CWA) Section 401

Water Quality Certification

ALA WAI SMALL BOAT HARBOR 600 ROW FINGER PIER REPAIR

Honolulu, Oahu, Hawaii

Prepared For:

Division of Boating and Ocean Recreation Hawaii Department of Land and Natural Resources

Prepared By:

P.O. Box 756

Haleiwa, HI 96712

May 2020

TABLE OF CONTENTS 1.0 INTRODUCTION .................................................................................................................... 0

2.0 PROJECT DESCRIPTION ....................................................................................................... 2

3.0 ORGANIZATION AND RESPONSIBILITIES ...................................................................... 3

4.0 DATA SAMPLING AND DATA QUALITY OBJECTIVES ................................................. 5

5.0 REPORTING ............................................................................................................................ 7

REFERENCES ............................................................................................................................... 8

LIST OF FIGURES Figure 1 Project Location……………………………….……………….…...……….…......2 Figure 2 Location of Proposed Construction Staging Area………..………….……….…....3 Figure 3 Photographic Monitoring Stations…………...………………………………….....6

Applicable Monitoring & Assessment Plan Ala Wai Small Boat Harbor Row 600

1

1.0 INTRODUCTION The Ala Wai Small Boat Harbor (Figure 1), is located on the south shore of O‘ahu between Ala Moana Park and Waikīkī Beach. It was first constructed from a barge channel in the 1900s and has been periodically enlarged to where it presently provides more than a thousand berths for sailboats and other pleasure crafts. It is surrounded by commercial properties, the largest being the Prince Waikīkī, Ilikai, and Hilton Hotels. The harbor contains two yacht clubs, the Waikīkī Yacht Club located on the northeast side of the small boat harbor, and the Honolulu Yacht Club located at the end of the central groin. A small man-made saltwater pond (“Hilton Lagoon”) adjacent to the harbor discharges into its southeast corner. The waters of Ala Wai Small Boat Harbor and nearshore waters from Kalihi Channel to Waikīkī Beach appear on the Hawai‘i Department of Health (HDOH) 2016 list of impaired waters prepared under Clean Water Act §303(d) (HDOH, 2016). This designation indicates that waters in these areas do not meet certain applicable water quality standards. Nearshore waters from Kalihi Channel to Waikīkī Beach are listed as impaired for turbidity. The Project location in the southeast interior of the Ala Wai Small Boat Harbor is adjacent to the Hilton Lagoon which discharges to this part of the harbor (Figure 1). Depth ranges down to 4.6 m (15 ft) to a bottom of fine sediments. This Applicable Monitoring and Assessment Plan (AMAP) has been written to accompany a notification form seeking Project qualification under the existing Section 401 Blanket Water Quality Certification (WQC0901, issued on 03/02/18). The Project proposes replacement of six finger piers in the Ala Wai Small Boat Harbor 600 Row (Figure 1). This plan has been written in accordance with Hawai‘i Department of Health water quality regulations promulgated in Hawai‘i Administrative Rules (HAR) Chapter 11‐54 (HDOH, 2014a), AMAP Guidelines (HDOH, 2015) and guidance from the General Monitoring Guideline for Section 401 WQC Projects (HDOH, 2000).


2

Figure 1. Project location (in red) inside the Ala Wai Small Boat Harbor on the South shore of Oahu. 2.0 PROJECT DESCRIPTION The scope of the Project is to replace six fixed piers (~25 ft long) within Row 600, which provides access to slips 601 through 612. The original six pier structures were constructed circa late 1960s/early 1970s but have since been removed due to deterioration. Based on a review of historical aerial photos, the last two remaining piers were removed sometime after August 2018. The new piers will be constructed of aluminum and will have a fiber reinforced composite (FRC) grating on the pier surface. The existing pier support piles and mooring piles will be re-used to support the new pier structure and boat slips. The new aluminum piers will be fabricated off-site and delivered to the project site via land or barge transport. A crane will be used to position the new docks into place. Construction of new pile caps, as well as repair work on the mooring piles, will be completed with a floating barge or workboat. However, the use of anchors or spuds will be prohibited to avoid any disturbance to the marina bottom. Construction of the raised abutment slab will be performed by a land-based crew involving water-tight forms. During all construction activities, special care will be taken to prevent any construction debris, water from concrete cutting, concrete slurry, or any other contaminants from entering the marina waters. This includes the use of water-tight concrete forms and/or adequate catchments between


3

the formwork and marina waters. The existing concrete will be adequately scored, cleaned and an adhesive applied prior to placement of new concrete. Once concrete work on the support piles and abutments has been completed and adequately cured, the new piers will be hoisted into position from either a barge or truck-mounted crane. Finally, the new gates will be set into the concrete abutments. The proposed maintenance activities will not involve any disturbance to the marina bottom. A support skiff or floats may be used to aid the construction team during the gangway installation; however, the use of anchors will be prohibited. A construction staging area located directly adjacent to the project site (Figure 2) will be available for the contractor’s use in temporarily staging project materials.

Figure 2. Location of proposed construction staging area (existing parking lot) adjacent to the project site. 3.0 ORGANIZATION AND RESPONSIBILITIES Table 1 provides the names or titles, responsibilities and qualifications of the personnel involved with the implementation of this AMAP.


4

Table 1. Summary of responsibilities and qualifications. Name/title/contact Organization Responsibility Qualifications Kosta Stamoulis, PhD kstamoulis@ shorelinescience.com (808) 756-3947

Shoreline Science & Engineering, LLC

QA/QC, program management, reporting

PhD in Marine Science, 16 years of relevant professional experience

Robert Walker, PE rwalker@ shorelinescience.com (808) 202-1920


Water quality monitoring, reporting, QA/QC

B.S. degree in Environmental Engineering M.S. degree in Geoscience 17 years of relevant professional experience Licensed professional engineer

Taylor Caster tcaster@ shorelinescience.com (808) 341-8982


Site inspections, reporting

B.S. degree in Civil and Environmental Engineering 5 years of relevant professional experience

Construction contractor TBD Notify SSE when work will commence with sufficient notice to conduct pre-construction photographic monitoring. Notify SSE of any modifications to work plan or BMPs. Continuously monitor water quality during construction activities.

Knowledgeable of construction activities as they relate to 401 WQC requirements. Familiar with aquatic environments. Knowledgeable of WQC monitoring requirements for this Project.

Finn McCall Engineering Branch Head Finn.d.mccall@ hawaii.gov (808) 587-3250

DLNR-DOBOR

Provide signed certifications as they relate to AMAP reporting; be available to the project team during construction if water quality concerns develop. May designate SSE as authorized representative to submit data to HDOH-CWB.

Licensed professional engineer

notes: TBD = to be determined (not yet known) SSE = Shoreline Science & Engineering, LLC


5

During construction, monitoring data including photographs, photo orientation map, and field notes will be submitted to HDOH‐CWB within 24 hours (or by the end of the next business day) of data collection, via DOH e-Permitting Portal (https://eha-cloud.doh.hawaii.gov/epermit/home). The Project Manager (Certifying person of the Section 401 WQC application) or their authorized representative (the representative must meet 40 CFR § 122.2 requirements) will be responsible for sending the reports to HDOH‐CWB. 4.0 DATA SAMPLING AND DATA QUALITY OBJECTIVES Based on guidance from the United States Environmental Protection Agency (USEPA, 2006) and Hawai‘i Department of Health AMAP Guidelines (HDOH, 2015), the Project-specific data quality objectives below describe each of the seven steps in the planning process and how they pertain to the monitoring and assessment of water quality during this Project. Step 1: State the problem Finger pier replacement at Row 600 of the Ala Wai Small Boat Harbor may potentially result in water pollutant discharges into harbor waters. The most probably contaminants include cement and debris from repair of existing support piles and abutments. Best Management Practices (BMPs) to prevent impacts to marina waters during construction include water-tight catchment collars on piles to catch any excess cement, and a floating debris/turbidity curtain surrounding in-water work areas. The project is expected to be less than a month in duration, therefore, photographic monitoring rather than water sampling will be implemented (HDOH, 2000). Monitoring photographs will be taken from at least eight locations to document BMPs, monitor their effectiveness, and to decide if modifications are necessary to protect surface waters. Step 2: Identify the goal of the study The objective of this AMAP is to provide an effective program that allows for a thorough evaluation of whether the BMPs for the Project are adequate to ensure compliance with Hawai‘i water quality standards and conditions specified in this AMAP. Step3: Identify information inputs Monitoring photographs Time stamped photographs will be taken of the Project work area, BMPs, and adjacent waters in the Ala Wai Small Boat Harbor. Pre-construction monitoring photographs will be taken once per day for three days prior to the start of Project in-water work. During construction activities, photographs of the Project area and adjacent waters will be taken daily during construction hours during each day of in-water work. After the completion of Project and removal of Project BMPs, post-construction monitoring will consist of one final set of photographs of the Project area and adjacent waters.


6

Description of site conditions SSE personnel will take notes on Project activities, the condition of Project BMPs, and any unusual site conditions at the time of data collection. They will perform visual inspections and record their observations along with date, time, tidal state, and weather conditions. Monitoring personnel will provide a descriptive narrative of what is being documented in each photograph. An orientation map will be included in each submittal to HDOH-CWB, showing the location and direction of each photograph. Step 4: Define the boundaries of the study The Impact Decision Unit (IDU) is defined as the water surface inside the boundary of the turbidity curtain that will encircle the in-water work area. Project photographic monitoring will take place at a total of six pre-defined locations (Figure 3). Three locations in the in-water work area surrounded by a turbidity curtain BMP (IDU), and three locations outside of the in-water work area and turbidity curtain – the Control Decision Units (CDU). Additional photographs will be taken to document Project BMPs and any other conditions or actions relevant to water quality.

Figure 3. Photographic monitoring stations and directions of photograph views. Three photographs will be taken at the Impact Decision Unit (IDU) and three photographs will be taken at each Control Decision Unit (CDU).


7

Step 5: Develop the analytical approach Monitoring results will be evaluated by comparing photographs and field notes of location where Project work is taken place – IDU and locations away from Project work activities – CDU. During construction monitoring data will also be compared to the pre-construction monitoring report. If monitors observe elevated turbidity near the work area then a determination of the probable source must be identified, if possible. If it is determined that Project activities are causing the elevated turbidity, then the responsible activity will be ceased until the issue is resolved or BMPs are modified or adjusted to contain the plume. As part of the daily, during-construction reporting submittals, HDOH-CWB will be notified of any such events within 24 hours or by the end of the next business day. Step 6: Specify performance or acceptance criteria Due to the short extent of the Project (< 1 month) and the expectation that the Project will have little temporary and no long-term adverse effects on the marine environment, photographic monitoring will be conducted. Photographs and visual monitoring of the Project work area, BMPs, and adjacent waters will be adequate to assess the effectiveness of Project BMPs. Step 7: Develop the Plan for obtaining data This monitoring program was developed based on the General Monitoring Guideline for Section 401 WQC Projects (HDOH, 2000), and AMAP Guidelines (HDOH, 2015). This AMAP may be modified based on changes in Project activities, changes in environmental conditions, visual and photographic observations, and/or other information that may become available. Modification of the monitoring design, if necessary, will improve monitoring and assessment of potential construction impacts on nearshore marine waters. 5.0 REPORTING The pre-construction monitoring report will be prepared by SSE and submitted to HDOH-CWB within 10 work days of completion of pre-construction sampling and before construction begins. All during-construction monitoring data and reports will be sent to HDOH-CWB within 24 hours or by the end of the next business day. A final report which includes all the results from pre-construction, during-construction, and post-construction monitoring will be prepared by SSE and submitted to HDOH-CWB within 20 work days of the final post-construction sampling event. The final report will include all pre-, during-, and post-construction monitoring data, and an analysis of Project impact on water quality.


8

REFERENCES Hawai‘i Department of Health (HDOH). 2000. General monitoring guideline for

Section 401 Water Quality Certification Projects. Available online at: URL: https://eha-cloud.doh.hawaii.gov/epermit/docs/matrix.pdf. Last accessed April 24, 2016.

Hawai‘i Department of Health (HDOH). 2014. Hawai‘i Administrative Rules, Title 11,

Department of Health, Chapter 54, Water Quality Standards. State of Hawai‘i, Department of Health. 110 pp.

Hawai‘i Department of Health (HDOH). 2015. AMAP Guidelines (DQO format) (HDOH). Hawai‘i Department of Health, 12 pp.

Hawai‘i Department of Health (HDOH). 2016. State of Hawaii Water Quality Monitoring and

Assessment Report: Integrated Report to the U.S. Environmental Protection Agency and the U.S. Congress Pursuant to §303(d) and §305(b), Clean Water Act (P.L. 97-117). 121 pp.

US Environmental Protection Agency (USEPA). 2006. Guidance on Systematic Planning Using

the Data Quality Objectives Process EPA QA/G‐4. EPA/240/B‐06/001. 121 pp.

Documents

Applicable Monitoring and Assessment Plan for Clean Water ......This Applicable Monitoring and Assessment Plan (AMAP) has been written to accompany a notification form seeking Project