Draft_20170919_WQMPP_Plan_WA_RRP_RIFG_100(2)_River_S_Bridge_Replace.pdf

WQMP TEMPLATE-please check with your Federal Permit Manager to make sure you are using the most current version.

River ‘S’ Bridge Replacement WQMMP

DRAFT

Water Quality Monitoring Plan (WQMP)

Ridgefield Wildlife Refuge River ‘S’ Bridge Replacement

Order Number _________

Prepared by

Steve Morrow, Environmental Specialist FHWA Western Federal Lands Highway Division

(September 19, 2017)

PURPOSE

This Water Quality Monitoring and Protection Plan (WQMPP) is required per our 401 Certification and intended to provide specific information on activities that will be performed within and/or over waters of the state, including wetlands, and provide a monitoring schedule for tracking the performance of Best Management Practices (BMP’s) used during in-water and over-water work within the limits of the River ‘S’ Bridge Replacement project.

This WQMP includes a monitoring schedule that identifies the appropriate parameters to be monitored, locations, monitoring and sampling procedures, and frequency.

OBJECTIVES

This WQMP will:

• Document the performance of BMPs used within waters of the state, including wetlands, we are working in through water quality monitoring and sampling.

• Help to ensure compliance with the conditions of the 401 certification while conducting construction activities below the Ordinary High Water Line (OHWL), including wetlands, and over water.

The WQMPP includes identification of the appropriate parameters to be monitored, locations, monitoring and sampling procedures, and frequency. It also contains the BMP’s and construction procedures that will be used to reduce impacts to waters of the state during specific identified construction activities over waters and/or below OHWL, including wetlands. These elements are described in detail and drawings are included, when necessary. Minor modifications to the stream bypass to address water quality issues and functionality of the system will be completed by the Contractor and does not require prior approval from Ecology to make necessary revisions.

IN-WATER/OVER WATER ACTIVITY DESCRIPTION

The project will replace the existing, trestle-style River S Bridge with a new bridge immediately to the south of the existing bridge. The new structure will be a four-span bridge supported on drilled shaft piers. It will be approximately 500 feet long to span both the US Coast Guard navigation channel of Lake River and the Burlington Northern Santa Fe (BNSF) railroad tracks east of the bridge. Each bent will be founded on piers supported by large-diameter drilled shafts that will be sufficiently embedded within the soil for structure stability.

Two large diameter shafts (10’ diameter) will be drilled at depth in Lake River (estimated 100 feet below mud line). Two piers (Pier 1 and Pier 2) will be placed in the river channel, with a third pier outside of the river channel on the eastern streambank to support the railroad overcrossing portion of the bridge. The new bridge will span over the BNSF railroad tracks, thereby making City of Ridgefield property to the south of the bridge inaccessible. A new City of Ridgefield Administrative Access Road will be constructed off of the approach on the east side of the bridge. This new Access Road will be gated and provide entry only to the City of Ridgefield. Construction requires the use of a temporary work bridge supported on about 150 piles (108 in-water piles) to facilitate construction of the mid-channel piers. The temporary work bridge would remain in place for approximately one year. The existing bridge will remain in place during construction and continue to be used for public access. Following construction the old bridge will be demolished. All utilities, railing and

River ‘S’ Bridge Replacement WQMMP Page 3 wood decking would be removed, and then deck stringers starting from one end working toward the other end would be removed. The creosote piles and steel pipe piles of the old bridge will be removed using use a vibratory hammer and crane. If wood piles are unable to be removed without breaking, they will be cut off 2’ below the mudline. Piles not to be dug from the bed.

All in water work is subject to the State and Federal water quality standards as authorized in Water Quality Certification Order # _______ Corps Reference No. NWS-2015-818.

The following activities will occur below the Ordinary High Water Mark (OHWM):

Construction

Described below is one way the bridge construction and existing bridge removal may occur. Once a construction contract is awarded, the contractor may sequence the construction in a way that may not conform exactly to the conceptual methodology and sequence described herein, but which best utilizes the materials, equipment, and personnel available to perform the work. While the contractor will be allowed some flexibility, any changes to construction sequencing or schedule will need to minimize impacts to navigation during construction.

The major factors that influence how the new bridge will be built include site constraints from the adjacent railroad, the need to maintain public access over the old bridge during construction, and the USCG’s requirement to maintain an opening for the navigation channel. The BNSF railroad on the eastern shore significantly limits construction access on that side of the river as trains pass frequently and BNSF require a setback for safe operation. All equipment and materials must pass over the railroad to reach the bridge site and delivery and placement of long bridge girders must be carefully planned to avoid prolonged blockage of the railroad.

Therefore, it is likely that the most the equipment and materials will be stored at staging areas on the west side of the bridge within the Refuge as well as on City of Ridgefield property that is south of the east approach of the existing bridge. The existing bridge is the only access point to the River S Unit of the refuge and keeping the existing bridge open to traffic while constructing the new bridge would limit work space. There may be temporary closures but the old bridge is expected to be open to traffic most weekends during construction. Finally, the US Coast Guard requires that any temporary work bridge provide the same vertical and horizon clearance as the existing bridge for vessels to pass unimpeded.

The present road and bridge approach on the east side of the bridge has a culvert that drains the intermittent tributary to Lake River (aka “intermittent stream S1”). Constructing a new bridge approach and City of Ridgefield Administrative Access Road will require replacing and realigning the existing 24” diameter culvert 38 feet in length with a 36” diameter culvert that is 68-feet in length. To construct the Administrative Access Road 209 linear feet of original stream channel will be filled.

Timeline & Sequencing

Construction is expected begin in the spring of 2018 and last up to two years. There are timing restrictions related to work over the railroad and in-water impact pile driving and shown on Table 1. In-water work activities, other than impact pile driving, are proposed to occur year-round. All in-water work will occur as shown on Error! Reference source not found.. The first construction season will focus on erection of the temporary work bridges and installation of drilled shafts and completion of foundations and substructure. The second work season will involve demolition of the old bridge and removal of the temporary work bridge.

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Table 1 – Approximate construction schedule

Schedule Duration Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Timing restrictions

No work over railroad 90 days

In-water work window (impact pile driving*) 47 days

Tasks Year 1

Award contract 1 day

Mobilize 30 days

Bridge shop drawings 45 days

Bridge girder fabrication and delivery 190 days

Design temporary work platforms 90 days

Construct access roads and work platforms 20 days

Construct west and east abutments 20 days

Construct east approach MSE wall 45 days

Construct west approach 45 days

Construct in-water drilled shaft* 14 days

Construct east bank drilled shaft 14 days

Construct in-water piers and cap* 14 days

Construct east bank piers and cap 14 days

Set girder span 1 5 days

Set girder span 2 5 days

Tasks Year 2

Set girder span 3 – over railroad 5 days

Place and cure CIP deck 20 days

Install bridge railing 10 days

Demo existing bridge* 20 days

Remove temporary work platforms* 20 days

* in-water work

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Table 2 - Proposed timing of in-water work in Lake River

Activity Description Activity Duration Timing

Install small-diameter piles (≤24”) with impact hammer with noise attenuation measures

Small-diameter piles will be used in the construction of temporary work bridges/platforms, tower cranes and oscillator support platforms.

Up to 1 hour/day (impact hammer operation). 14 days.

Only within approved in-water work window variance of June 1 through September 15.

Install small-diameter piles (≤24”) with non-impact methods(i.e., vibratory installation)

Small-diameter piles will be used in the construction of temporary work bridges/platforms, tower cranes and oscillator support platforms.

Length of work day is subject to local noise ordinances, however could be up to 24 hours/day. 2 years.

Year-round provided work does not violate water quality standards.

Extract small diameter piles (≤24”)

Removal of small-diameter piles will be done using vibratory equipment or direct pull.

Length of work day is subject to local noise ordinances, however could be up to 24 hours/day.

Year-round provided work does not violate water quality standards.

Install large-diameter drilled shaft casings (≥72”) using vibratory hammer, rotator, or oscillator to install casing

Used to construct the in-water piers and caps.

Length of work day is subject to local noise ordinances, however could be up to 24 hours/day. 28 days.

Year-round provided work does not violate water quality standards.

Clean out shafts and place reinforcing concrete inside steel casings.

Applies to all piers and shafts. All activities/materials will be contained within the casings and have no contact with the water.

Length of work day is subject to local noise ordinances, however could be up to 24 hours/day. 56 days.

Year-round provided work does not violate water quality standards.

Remove existing bridge timber piles, spot remove existing material from river bed.

Applies to all piles and cross-members. Removal by direct pull or use a vibratory hammer. If piles unable to be removed without breaking, cut off at the mudline. Piles not to be dug from the bed.

Length of work day is subject to local noise ordinances, however could be up to 24 hours/day. 2 years.

Year-round provided work does not violate water quality standards.

* NOAA Fisheries Biological Opinion WCR-2014-1203

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Site Preparation

Prior to ground disturbing activities, the contractor will install erosion control measures, such as sediment fence, as described the project’s SWPPP plan to prevent soil erosion into nearby waterbodies or ditches. Portions of the streambank south of the existing bridge will be cleared of vegetation to provide space for the temporary work bridge and the shoreline pier supporting the new bridge.

Most vegetation removal will occur along the eastern streambank. About 12 deciduous trees, ranging in size from 6-30 inches in diameter, will be cut. Trees will be cut at ground level with their rootballs left in place; no grubbing is planned. The cleared areas would then be filled with cribbing and temporary fill to create a level interface between the work bridge and the ground. On the western streambank, an area about 40 feet by 24 feet (about 960 square feet) will be cleared of grasses and shrubs and filled with temporary fill to connect the work bridge to the existing ground. No fill or excavation in the river channel is needed for site preparation.

A new City of Ridgefield Administrative Access Road will be constructed off of the approach on the east side of the bridge, this access road is necessary to provide access for the City of Ridgefield to their property as this new bridge will span over the BNSF RR tracks and City property. As a result of constructing the Administrative Access Road it was calculated 245 linear feet of stream channel was determined to be in a 36” culvert. This intermittent stream (Identified as “S1”) has a very steep gradient (12%), has two passage barriers downstream and is not fish bearing. In order to meet City of Ridgefield road design standards, it became necessary to expand the road footprint to allow for less steep side slopes to the road fill. Constructing an Administrative Access Road that will meet City of Ridgefield design standards will require complete filling of the bottom of the small ravine, therefore there will not be any room for a constructed open channel. The impacts include piping 245 linear feet of stream channel (640 ft²); together with a riprap pad at the culvert outlet will result in 804 ft² of permanent impact to aquatic habitat and the removal of 29 mature deciduous trees and 2 conifer. To compensate, 0.02 acre credits will be purchased at the Columbia River Mitigation Bank.

Construction Access & Staging

Construction will require areas for staging, preassembly, storage, and manufacture of materials. The following activities will be completed at on-site staging areas:

• Material storage including reinforcing, shaft casing, formwork, excavation waste, concrete materials, approach walls, and bridge rails

• Preassembly of reinforcing steel cages for drilled shafts

Based on these activities it is assumed that three areas near the bridge will be used for staging of equipment and materials: 1) City owned parcel near railroad tracks, 2) the field in the southwest quadrant in front of levee, and 3) behind the levee across the dirt road from the visitor reception building manned by the refuge volunteers. Additional space along the proposed roadway realignment could also be used depending on contractor operations and traffic control needs. The City owned parcel is currently surfaced with rock and being used as a staging area for railroad maintenance work. Staging in the field below the levee will allow for easy access to the work bridge. A nearby wetland in this area will be fenced off during construction to prevent impacts. The staging area near the parking lot is likely where refueling and equipment maintenance will occur because it has the easiest access and is separated from the Lake River by a levee. The contractor will ultimately determine use and development of staging areas but these three locations appear to be the most feasible.

Although, FHWA expects most of the bridge work to be completed from the temporary work bridge, the contractor may elect to use a barge for certain tasks such as material delivery or removal of the old bridge. If needed, barge landings will be confined to areas of the shoreline already disturbed by other construction activities.

Access to staging areas and work site will primarily be from South Refuge Road with construction spur roads on each side of the river to connect to the temporary work bridge. A figure showing staging area is provided in the project plans sheet D.2.

In-water Work

Temporary Work Bridge

A work bridge will extend into the river from each bank to allow drill rigs to position over the mid-channel drilled shaft locations and provide a location for cranes to place the girders. US Coast Guard has determined the Bridge Permit will be conditioned to require an open center span on the work bridge; this open span will be maintained to avoid impeding the navigation channel. The

River ‘S’ Bridge Replacement WQMMP Page 7 work bridge will be designed by the contractor but it is likely to be supported on a grid of piles to create a work surface for construction of new bridge. The contractor will determine the final number and size of piles but the contract will stipulate that piles shall not exceed steel pipe pile 24-inches or steel H-pile greater than HP24. The work bridge is assumed to be about 24 feet wide and 380 feet long with approximately 60 foot by 40 foot work platforms at each pier; these structure dimensions are likely to require about 150 piles (assuming 6 foot spacing). For the purposes of this evaluation, it is assumed 108 of these piles would be located within Lake River below ordinary high water. To minimize disturbance to the river, the work bridge will be constructed using top down methods where steel piles are first place along the shoreline then topped with prefabricated bridge deck units before moving sequentially out into the river. Using this method, no equipment would operate in the water. Treated wood will not be used for any support piles or in any other part of the work bridge. Piles will be driven into the streambed using a vibratory hammer to the estimated tip then proofed with an impact hammer to load bearing capacity. The temporary work bridge would remain in place for approximately one year.

In-water bridge foundations

The construction of the bridge requires constructing two piers in the river. These piers will be situated to maintain the existing USCG navigation channel. Piers will be founded on singular large-diameter drilled shafts that will be sufficiently embedded within the soil for structure stability. The two drilled shafts are designed to be 10-foot-diameter and 110 feet in depth.

These shafts could be installed by using a track-mounted auger working from the temporary work bridge. Because the shafts are drilled below the water table and through outwash deposits and deep clay deposits, the holes are expected to require the use of a casing to prevent caving and maintain an open hole. The casings also function as a cofferdam that separates the drill site from the flowing water of Lake River. Water and soil removed from the river bed during foundation installation will pumped or contained and hauled to an upland disposal area or storage tank.

Bridge Work

The four-span precast girder system will be configured with four simple spans between each pier, and a continuous deck cast over the entire structure tying all the bridge elements together. Because of the inherent instability of single, unbraced girders, it is expected that the girders will be temporally braced until all subsequent girders place with internal diaphragms are installed. A concrete pumper truck located on the work bridge or shoreline will be used to deliver concrete to the new bridge deck. The bridge desk will be cast in watertight forms and any water used for concrete curing will be collected and disposed at an upland area. A containment system will be used to prevent debris from dropping into the river during over-water bridge work.

Road Work

The project involves minor road work, the new bridge will tie into the existing road alignment. Since the new bridge will be slightly offset from the existing bridge the approach road will be shifted. An Administrative Access Road will be constructed off the east bridge approach to allow the City of Ridgefield to access their property just upstream of the bridge on the east side. The roadbed will be a mechanically stabilized earth (MSE) fill to reduce the footprint of the road bed fill. Unused approach fill from the old road will be removed and taken off-site and the area re-contoured to match surrounding ground.

Removal of the Existing Bridge

After the new bridge is complete the existing bridge will be removed. All utilities, railing and wood decking would be removed, and then deck stringers starting from one end working toward the other end would be removed. The creosote piles and steel pipe piles of the old bridge will be removed using use a vibratory hammer and crane. The vibratory hammer is useful in loosening the adhering sediments before extraction. Holes left by removed piles are expected to quickly fill in with the silty substrates present at the bridge site. Capping of holes with imported sediments is not planned. Removal of the existing bridge is not subject to in-water work window restrictions, provided water quality standards are being met.

Post-project Site Restoration

The new bridge will be wider than the old bridge and removal of the approach fill associated with the old bridge will re-open a portion of the floodplain that was occupied by the old bridge. Disturbed areas will be reseeded and planted with native vegetation as prescribed by the refuge manager (see table below). USFWS will monitor the success of re-vegetation as part of their routine vegetation maintenance at the refuge.

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Habitat Seed Type Seeding Rate Upland roemer's fescue (50%), Columbia brome (30%), blue wild rye (20%) 30 lbs/acre

Riparian California oatgrass (20%), meadow barley (60%), blue wild rye (20%)

25 lbs/acre

Wet Canada rush (50%) and Columbia sedge (50%) 20 lbs/acre

Avoidance and Minimization Measures (BMPs)

• Install high-visibility construction fencing to avoid unintended impacts to sensitive areas. Implement an Engineer-approved Spill Prevention Control and Countermeasures (SPCC) plan to guard against the release of any harmful pollutant or product. Maintain a current copy of approved SPCC plan on-site for the duration of the project and no work or staging shall occur prior to implementing the plan. The approved SPCC plan provide site- and project-specific details identifying potential sources of pollutants (e.g. creosote treated timber), exposure pathways, spill response protocols, protocols for routine inspection fueling and maintenance of equipment, preventative and protective equipment and materials, and emergency notification and reporting protocols.

• Install and maintain appropriate temporary erosion and sediment control measures to avoid and minimize affects to waterbodies and wetlands resulting from clearing, grading, management of site drainage, and related activities.

• Clean and inspect all equipment to be used for the construction activities prior to arriving at the project site. Ensure no potentially hazardous materials are exposed, no leaks are present, and that equipment is properly functioning.

• All pumps used to collect water from Lake River will employ fish screening to avoid the impingement and entrainment of juvenile salmonids according to NMFS 2008.

• Implement a system or plan to ensure containment of materials, wastes, or debris resulting from bridge construction and demolition. Any treated wood wastes from old bridge will be disposed at a properly permitted disposal site.

• . Operate construction equipment from work bridge, floating barge, or access road above OHWM.

• Use only vegetable-based oils in hydraulic lines for any equipment operating in the water or directly overwater.

• The contractor will prepare a Spill Prevention, Control, and Countermeasures (SPCC) Plan prior to beginning construction.

The SPCC Plan will identify the appropriate spill containment materials, which will be available at the project site at all times.

Pile driving

• Impact hammer pile driving shall occur during an in-water work window of June 1 to September 15.

• Use of In-water vibratory piling for pile installation or removal may occur at any time.

• Place temporary piling for work bridge using a vibratory pile driver to drive pile to the point of practical refusal before switching to an impact hammer for pile proofing. This will reduce the number of pile strikes by upwards of 90 percent.

• All non-load bearing piles will be installed by vibratory means.

• When using impact hammer to proof piles surround the pile being driven with a bubble curtain, as described in NMFS and USFWS (2006, Attachment A ),that must distribute small air bubbles around 100% of the pile perimeter for the full depth of the water column. Prepare

Drilled shaft installation

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• Use casing to installation to isolate the drilled shaft work area from the active flow of Lake River. Install casing using vibratory driver or casing oscillator.

• Pump water from drilled shaft installation to upland area or containment area for later disposal.

• Barge-mounted slurry waste bins that will receive concrete and/or slurry water will be lined to prevent leakage.

• Material excavated from within casing (slurry and sediment) will be loaded onto receiving barges that will not be overfilled to the point where material overflows directly back to Lake River

• Eco-Pans and visqueen plastic will be used to contain and collect any concrete or slurry drips to prevent spills.

Piling removal

• Install a floating surface boom to capture floating surface debris, except in the Coast Guard defined navigation channel.

• Keep all equipment (e.g., bucket, steel cable, vibratory hammer) out of the water, grip piles above the waterline, and complete all work during low water and low current conditions.

• Dislodge the piling with a vibratory hammer, when possible – never intentionally break a pile by twisting or bending.

• Slowly lift the pile from the sediment and through the water column.

• Place the pile in a containment basin on a barge deck, pier, or shoreline without attempting to clean or remove any adhering sediment. Pilings shall not be shaken, pressure cleaned, left hanging to dry or any other action intended to clean or remove the adhering material from the pile.

• If pile is intractable or breaks, cut the pile off at the sediment line.

• Dispose of all removed piles, floating surface debris, any sediment spilled on work surfaces, and all containment supplies at a permitted upland disposal site.

Bridge Superstructure/Overwater Construction

• A work platform will be installed between the girders and along the outside edge of both sides of the bridge. The platforms will create a secondary containment area to prevent construction debris from falling into the creek while the superstructure is completed.

• The false-work placed for the deck pour will be the primary containment to prevent concrete from reaching the creek area during the concrete deck pour.

• All seams and joints will be caulked to prevent leaching of concrete through the false-work during the placement of the concrete deck. WFLHD Inspectors will visually monitor the deck pour and check for leakage through the secondary containment.

• Plastic tarps will be available to deploy under the deck during the pour if observations indicate that the primary and secondary containment are not functioning. Work will not be allowed to continue if concrete is not being contained by the Contractor.

Barge use

• Any barge used as a work platform to support construction must be: (1) large enough to remain stable under foreseeable loads and adverse conditions; (2) inspected before arrival to ensure vessel and ballast are free of invasive species; and (3) secured, stabilized and maintained as necessary to ensure no loss of balance, stability, anchorage, or other condition that can result in release of a contaminant or construction debris.

• Focus barge operations where water depths are the greatest and only move barges when water depths are sufficient to avoid and minimize prop-wash and resulting turbidity.

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WATER QUALITY STANDARDS FOR SURFACE WATERS

The Washington State Department of Ecology establishes surface water quality standards (Chapter 173-201A WAC) as required by the Environmental Protection Agency (EPA). All surface waters of the state have uses designated to them for protection under this chapter. These standards are intended to protect surface waters of the state for beneficial uses. These uses include public health, recreation, and the propagation and protection of fish, shellfish, and wildlife.

Surface waters of the state include lakes, rivers, ponds, streams, inland waters, saltwater, wetlands, and all other surface waters and water courses within the jurisdiction of the state of Washington. This project is located in Lake River which is in Water Resource Inventory Areas (WRIA) 28 Salmon/Washougal and involves work in Lake River and an un-named intermittent tributary to Lake River.

• The appropriate standard for turbidity is 5 NTU over background when the background is 50 NTU or less; or a 10% increase when the background turbidity is more thatn 50 NTU.

For turbidity monitoring the following will be followed for determining the point of compliance:

a) For waters up to 10 cfs flow at the time of construction, the point of compliance shall be one hundred feet downstream from the activity causing the turbidity exceedance.

b) For waters above 10 cfs up to 100 cfs flow at the time of construction, the point of compliance shall be two hundred feet downstream of the activity causing the turbidity exceedance.

c) For waters above 100 cfs flow at the time of construction, the point of compliance shall be three hundred feet downstream of the activity causing the turbidity exceedance.

Note: If flows cannot be determined at time of construction, the point of compliance shall be measured according to b) above at 200 feet downstream of the construction activity. The sampling maps have identified the approximate location of the 200’ point of compliance.

• pH shall be within the range of 6.5 to 8.5, with a human-caused variation within the above range of less than 0.5 units.

• Oil and Grease - No Visible Sheen.

WATER QUALITY MONITORING & CRITERIA

Water quality monitoring during in-water or over-water work will be done as described below:

For turbidity, one upstream and one downstream sample should be collected shortly after the work begins each day. No further sampling is required if the sample meets standards and visual inspections reveal no change in water quality throughout the day unless otherwise required. The site shall be continuously monitored visually during all in-water and over-water work. Inspection of in-water BMPs will be conducted daily and within 24 hours following a rain event.

http://www.ecy.wa.gov/services/gis/maps/wria/wria.htm

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MONITORING SCHEDULE

Table 1. The following table outlines the monitoring parameters and schedule for all in-water work activities.

In-water Activity

Waterbody Monitoring Point Location

Frequency Parameters WQ Standard

Culvert Installation

Un-named Tributary to Lake River (if there is active flow)

See Attachment B

Sample 2x daily when in-water work activities occur & there is active flow. If there is no flow, no monitoring required.

Turbidity See Turbidity Standard Above

Installation of drilled shafts and temporary piles

Lake River See Attachment B

Sample 2x daily when in-water work activities occur

Turbidity See Turbidity Standard Above

Pouring concrete into the drilled shafts

Lake River Collect a water sample from the waterbody at the point where material entered the water (or as close as possible within a 50 foot radius)

Sampling for pH is needed in the event there is a leak or an unauthorized discharge from concrete activities pH See pH Standard Above

Piling Removal Lake River See Attachment B

Sample 2x daily when in-water work activities occur

Turbidity See Turbidity Standard Above

MONITORING LOCATIONS

• A background (BG) sample location 200’ upstream and 200’ downstream of the existing bridge will be utilized to take a reading of the current water quality. Because Lake River is tidal in nature, there are times when the river flow is upstream – and therefore the downstream location would become the background sample location. The background location has been identified on the plan sheets Attachment B. The background reading will be taken twice daily during the in-water work activity. During water quality sampling additional background readings will be taken if water quality appears to be fluctuating upstream of the work activity.

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SAMPLE METHODS:

All field samples will be acquired from the documented sample locations and tested on site. A Hach Model 2001P Turbidity Meter (or equivalent) will be used to test turbidity. High Range pH-indicator strips 0-14 will be utilized to analyze discharges near concrete pouring activities should there be a spill incident or when fresh concrete escapes containment.

All samples shall include the following information:

a. The date, sample location, and time of sampling

b. Personnel who collected the sample and their telephone number(s)

c. The analysis that was performed

d. The analytical techniques used / methods used and the method detection limits

e. The results of such analysis

The Contractor’s Environmental Compliance Inspector will be responsible for performing the water quality testing and/or responsible for directing qualified personnel for turbidity testing as required by the Water Quality Certification (Order #__________). Results will be provided to the WFLHD Contract Officer (CO) before mailing up to the Washington State Department of Ecology in compliance with Water Quality Certification (Order #__________).

All Samples will be collected following the Water Quality Monitoring Protection Plan. All visual inspections and observations shall be noted during the monitoring process. Photographs will be taken if events occur that are out of the ordinary.

CONTINGENCY:

If sample results confirm that water quality is out of compliance with water quality standards, the Project will modify or stop the activity causing the problem and commence the contingency sampling requirements until standards are met for two consecutive sample periods.

Parameter Contingency Sampling Location

Contingency Frequency WQ Standard

Turbidity Point of Compliance

Note: It is recommended to take a midpoint sample

Sampling will continue every 30 minutes until three consecutive samples indicate that water quality thresholds have been met.

See above pH Collect a water sample from the waterbody at the point where material entered the water (or as close as possible within a 50 foot radius)

Sampling will continue every 30 minutes until three consecutive samples indicate that water quality thresholds have been met.

See above

Oil/Grease Point of Compliance Continuous-Visual No Sheen

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Once compliance with water quality standards is achieved, the project shall return to its standard sampling schedule.

NON-COMPLIANCE

If either visual or physical monitoring indicates that water quality standards have been exceeded, the required reporting and procedures will be initiated.

If water quality exceedances are observed outside of the point of compliance, work shall cease immediately and the Applicant or the Contractor shall assess the cause of the water quality problem and take immediate action to stop, contain, correct the problem and/or prevent further water quality turbidity exceedances. If an exceedance occurs, the Applicant shall follow the protocols and notification procedures identified in the “NOTIFICATION REQUIREMENTS” below.

Notification of exceedances that are detected through water quality monitoring shall be made to the FHWA Contract Officer (CO) immediately. FHWA will then notify Ecology’s Federal Project Coordinator within 24 hours of occurrence.

The Contractor shall, at a minimum, provide the CO with the following information:

a) A description of the nature, extent, and cause of non-compliance, including the quantity and quality of any unauthorized discharges;

b) The period of non-compliance, including exact dates, duration, and times and/or the anticipated time when the Applicant will return to compliance;

c) The steps taken, or to be taken, to reduce, eliminate, and prevent recurrence of the non-compliance.

NOTIFICATION REQUIREMENTS:

If sample results or visual monitoring indicate an exceedance of water quality standards, notification shall be made by FHWA within 24 hours to the Ecology Federal Project Coordinator. Notification shall be made via phone or e-mail (e-mail is preferred) to Ecology’s Federal Project Coordinator. Notifications shall be identified with Order # ______ and include the Applicants name, project name, project location, project contact and the contact’s phone number.

Notification will be made, as described above, immediately following a violation of state water quality standards, spill to waters of the state or when the project is out of compliance with any of the Orders conditions.

In addition to the phone or e-mail notification, the Applicant shall submit a detailed written report to Ecology within five (5) days that describes the nature of the event, corrective action taken and/or planned, steps to be taken to prevent a recurrence, results of any samples taken, and any other pertinent information.

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Work will be allowed to continue after corrective action has been planned or implemented, and steps to prevent a recurrence have been identified and the project shall return to its standard sampling schedule.

REPORTING

All monitoring results (visual and physical) will be recorded on the monitoring form attached (Attachment A) and reported to the FHWA Monitoring Contact and submitted to the Ecology Federal Project Coordinatorat the frequency specified inWater Quality Certification (Order ________).

MONITORING PLAN

Monitoring Contacts

Steve Morrow with Federal Highway Administration’s Western Federal Lands Highway Division will be responsible for providing Ecology with the necessary notifications and results of the water quality monitoring according to the frequency specified in the Section 401 Water Quality Certification (401). Monitoring personnel who will conduct the 401 water quality monitoring will be determined by the contractor.

Name: TBD Office Phone: TBD Cell Phone: TBD

ATTACHMENTS

Attachment A - Sample Monitor Results Reporting Form Attachment B - Monitoring Location Maps

River ‘S’ Bridge Replacement WQMMP Page 15

ATTACHMENT A

Sampling Form for In-Water Work

Date: __________________ Project: _____________________________________________ Name of Person Sampling: _______________________________ Date of last calibration for Turbidity Meter: ________ Date of last calibration for pH meter: _______ Waterbody: _____________________________________ Activity Description: _______________________________________________________________ Activity Start Time: ________ Activity Stop Time: _________

Sample Location

Monitoring Point Time Turbidity pH Sheen?

Notes (include weather , waterbody flow in cfs, other observations of waterbody, etc) stephen.morrow Oval stephen.morrow Oval stephen.morrow Callout Background (BG) Sampling Location stephen.morrow Callout Turbidity Point of Compliance (POC) Sampling Location stephen.morrow Callout WQ monitoring to occur ONLY if there is active flow in the stream at the time of construction

Text Box

Oval stephen.morrow Oval stephen.morrow Callout Background (BG) Sampling Location stephen.morrow Callout Turbidity Point of Compliance (POC) Sampling Location stephen.morrow Callout WQ monitoring to occur ONLY if there is active stream flow at the time of construction

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