Final_signed_UTR_SWPPP_June_2013_with_amendments.pdf

Waste Discharge Identification Number (WDID):

STORM WATER POLLUTION PREVENTION PLAN

for

The Upper Truckee River Reach 5 Restoration and Utility Relocation Project

USDA FOREST SERVICE, LAKE TAHOE BASIN MANAGEMENT UNIT

(LTBMU)

Legally Responsible Person (LRP)

Nancy Gibson, Forest Supervisor

Lake Tahoe Basin Management Unit

530-543-2600

Approved Signatories

Theresa Cody, PH/QSD

LTBMU

Office: 530-543-2788 Cell: 530-545-2057

Prepared by: Theresa Cody, PH, QSD

Reviewed and Concurred:

CtriL /i/ Theresa Cody, QSD Date

SWPPP Date: June 18, 2013 i

Contents I. Introduction and Certifications

A. SWPPP Objectives

B. Permit Registration Documents

C. Certification and Training Requirements

Qualified SWPPP Developer and Practitioner

Legally Responsible Person

D. Contractor List

E. Emergency contact person and 24-hour phone number

F. SWPPP Availability and Public Records Access

G. Required Changes

II. Project Information

A. Project Description, site address and driving directions

B. Estimated Phasing and Implementation Schedule

C. WDID

D. Potential Construction Site Pollutants of Concern and Sources

E. Site Location Maps

III. Best Management Practices

A. Site Management

B. Sediment and Erosion Control

Erosion Control

Sediment Control

C. Non-Storm water and Material Management

D. Dewatering and Diversions Plan

E. Active Treatment System Plan

F. Post-Construction Storm water Management Measures

G. Schedule for BMP Implementation

H. BMP and Disturbed Soil Area maps

IV. BMP Inspection, Maintenance and Rain Event Action Plans

A. BMP Inspection and Maintenance

B. Rain Event Action Plan ii

V. Construction Site Monitoring and Reporting Plan (CSMRP)

A. Purpose

B. Weather and Rain Event Tracking

C. Visual Monitoring

D. River Diversion and Dewatering Monitoring

E. Water Quality Sampling and Analysis

F. Summary of Construction Monitoring

G. Watershed Monitoring Option

H. Quality Assurance and Quality Control

I. Reporting Requirements and Records Retention

Weekly Reporting during active construction

Record Keeping

J. Non-Compliance Reporting

24-Hour Reporting

Planned Changes

Anticipated Noncompliance

K. Annual Report

L. Final Report

VI. Appendices

Appendix A. SWPPP Amendment Forms

Appendix B. CASQA BMP Standard Specifications

Appendix C. Site Maps

Figure 1. Project and Stormwater Discharge Monitoring Location Map

Figure 2. Temporary Access, Staging and Disturbed Soil Areas Map

Appendix D. Construction Plans – Reach 5 Restoration Project

Appendix E. Technical Specifications – Reach 5 Restoration Project

Appendix F. Construction Plans – Utility Relocation Project

Appendix G. Technical Specifications – Utility Relocation Project

Appendix H. Visual Monitoring/BMP Inspection Forms

Appendix I. Rain Event Action Plan Template

Appendix J. Estimated Construction Schedule

Appendix K. Upper Truckee River Restoration, Reach 5 Effectiveness Monitoring Plan iii

Appendix L. Permit Registration Documents

Appendix M. Training Logs

Appendix N. Previously Issued Permitting Documents

Appendix O. Water Quality Sampling and Analysis Plan

Appendix P. QSD/QSP Certification

I. Introduction and Certifications

A. SWPPP Objectives This Storm Water Pollution Prevention Plan (SWPPP) has been developed for the Upper Truckee River (UTR) Reach 5 Restoration and Utility Relocation Project to comply with the requirements of the Clean Water Act to implement Best Management Practices (BMPs) to achieve compliance with effluent limits and receiving water objectives as directed by the Construction General Permit for the Lake Tahoe Hydrologic Unit (Board Order R6T-2011-0019, NPDES No.

CAG616002). This SWPPP has been developed and will be amended, when necessary, to meet the following objectives:

1. Identify pollutant sources including sediment sources that may affect the quality of storm water discharges associated with construction activity.

2. Identify non-storm water discharges.

3. Identify, construct, implement and maintain BMPs to reduce or eliminate pollutants in storm water discharges and authorized non-storm water discharges from the construction site.

4. Identify all effluent discharge outfall locations, sampling and analysis strategy and protocols, and a sampling schedule for discharges from the identified outfalls from the project area.

B. Permit Registration Documents Required Permit Registration Documents (PRD) shall be submitted to the State Water Board via the Stormwater Multi Application and Report Tracking System (SMARTS) by the Legally Responsible Person (LRP), or authorized personnel (i.e., Approved Signatory) under the direction of the LRP. The project specific PRDs include:

• Notice of Intent (NOI);

• 401;

• Site Maps;

• Annual Fee;

• Signed Certification Statement (LRP Certification is provided electronically with SMARTS

PRD submittal); and

• SWPPP.

Site Maps are located in Appendix C, and as part of the Construction Plans in Appendices D and F. A copy of all other submitted PRDs shall be kept in Appendix L along with the Waste Discharge Identification (WDID) confirmation.

C. Certification and Training Requirements

Qualified SWPPP Developer and Practitioner

The SWPPP for this project was developed by Theresa Cody, PH a Qualified SWPPP Developer (QSD). The QSD shall certify and amend the SWPPP. Theresa Cody is the appointed QSD for this Project and meets the certification requirement of Section Vll.B.1 of the Construction General Permit based on:

Professional Hydrologist, American Institute of Hydrology, Certification #12-H-4011

Qualified SWPPP Developer (QSD) Registration #23615

The QSD has received the following training:

California Construction General Permit Training, June 2011

Theresa’s QSD/QSP Certificate is in Appendix P. Throughout this document Theresa Cody will be referred to as the QSD.

Project Name: Upper Truckee River Reach 5 Restoration and Utility Relocation Project

“The Storm Water Pollution Prevention Plan and Appendices were prepared under my direction to meet the requirements of the Construction General Permit for Storm Water discharge in the Lake Tahoe Hydrologic Unit (Board Order No R6T-2001-0119). I certify that I am a Qualified SWPPP Developer in good standing as of the date signed below.”

QSD Signature Date

The QSP shall have primary responsibility and significant authority for the implementation, maintenance and inspection/monitoring of the SWPPP requirements. The QSP will be available at all times throughout the duration of the project.

Duties of the QSP include but are not limited to:

• Ensuring full compliance with the SWPPP and the Construction General Permit.

• Implementing all elements of the SWPPP, including but not limited to:

o Ensuring all BMPs are implemented, inspected and properly maintained;

o Preparing pre-storm, during storm, and post-storm BMP inspection reports;

o Preparing weekly turbidity monitoring summary reports based on continuous turbidity monitoring and relevant grab sample monitoring data collected during active construction periods;

o Performing routine inspections and observations;

o Performing non-storm water visual observations and inspections;

o Performing non-storm water sampling and analysis, as required;

o Implementing non-storm water management, and materials and waste management activities such as: monitoring discharges; general site clean-up;

vehicle and equipment cleaning, fueling and maintenance; spill control; ensuring that no materials other than storm water are discharged in quantities which will have an adverse effect on receiving waters; etc.;

o Conducting pre-storm inspections for qualifying storm events;

o Conducting daily inspections during qualifying storm events;

o Conducting post-storm inspections for qualifying storm events;

o Monitoring weather forecasts for both likely precipitation events and qualifying rain events;

o Preparing and implementing Rain Event Action Plans for likely precipitation events;

o Submitting numeric effluent limitations (NELs) exceedence data, including storm water effluent limits and receiving water limits and reports to the QSD and Approved Signatory. Following receipt of the QSD’s and/or Approved Signatory’s approval, QSP shall upload the NEL exceedence data or report to the SWRCB’s SMARTS database;

o Ensuring elimination of all unauthorized discharges;

o Mobilizing crews in order to make immediate repairs to the control measures as needed;

o Notifying the LRP or Authorized Signatory immediately of off-site discharges or other non-compliance events;

o Submitting Notices of Discharge and reports of Illicit Connections or Illegal

Discharges; and o Preparing Annual Reports each year summarizing corrective actions, sampling and analyses, and any corrective actions not implemented.

The QSP may delegate the inspections and activities to an appropriately trained employee, but shall ensure adequate deployment.

The QSP shall also be responsible for providing training of project personnel on SWPPP implementation procedures including USDA Forest Service personnel and crews working under the Utility Relocation Contractor. Before construction operations commence under each phase the QSP will conduct an on-site training with project personnel to review the SWPPP, construction operations and necessary BMPs. Additionally, periodic trainings will be held on specific tasks as the project progresses and tasks change. Training logs (Appendix M) will be filled out for each training season and kept with the SWPPP. LRWQCB staff will be given advance notice of trainings when possible and have the opportunity to attend.

Legally Responsible Person

Approval and Certification of the Storm Water Pollution Prevention Plan

Project Name: Upper Truckee River Reach 5 Restoration Project

“I certify that this document and all Appendices were prepared under my direction in accordance with a system designed to ensure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief, the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information.”

Nancy Gibson Lake Tahoe Basin Management Unit

Legally Responsible Person Organization

/ /LRP Signature -‘ Date

Forest Supervisor 530-543-2600

Title Telephone Number ft Contractor List Carol Beahan of Stream Solutions LLC is the Design Engineer for the UTR Reach 5 Restoration and Utility Relocation Project. Carol Beahan and members of her design team from Northwest

Hydraulic Consultants and Western Botanical Services have been contracted by the LTBMU to provide periodic construction oversight during key installations. Throughout this document

Carol Beahan will be referred to as the Design Engineer.

The USDA Forest Service will be acting as the Prime Contractor for all work under the UTR

Channel Restoration effort. The contract(s) to provide equipment and purchase materials for the UTR Channel Restoration effort and the construction contract for the UTR Utility Line

Relocation effort will be awarded closer to the date of implementation. A list of awarded

Contractors and Subcontractors who will be working on the Project will be added to the SWPPP once the contracts have been awarded.

E. Emergency contact person and 24-hour phone number

Owner and UTR Channel Restoration Prime Contractor:

US Forest Service LTBMU

35 College Drive South Lake Tahoe, CA 96150 530-543-2600

Project Manager: Theresa Cody, PH

LTBMU

Office: 530-543-2788 Cell: 530-545-2057 (24-hour)

Assistant Project Manager:

Stephanie Heller, Hydrologist

LTBMU

Office: 530-543-2838

24-Hour (alternate):

Sue Norman, Physical Sciences Group Leader

LTBMU

Office: 530-543-2662 Cell: 530-400-9888

Hazardous Spill: Genevieve Villemaire Forest Spill Coordinator, LTBMU 530-543-2783 24-Hour contact Camino Dispatch 642-5170

UTR Utility Line Relocation Contractor:

To Be Determined

F. SWPPP Availability and Public Records Access A copy of the SWPPP will be kept on the project site at all times. Additionally, the SWPPP will be available to view in the SMARTS database.

G. Required Changes The SWPPP shall be maintained such that it reflects the actual site conditions for the duration of the project. This will require the QSD to amend the SWPPP whenever a qualifying change is made. The SWPPP shall be revised when:

• There is a change in construction or operations which may affect the discharge of pollutants to surface waters or ground waters as determined using the criteria outlined in the “Planned Changes” Section of this document;

• There is an increase in the disturbed acreage;

• BMPs do not meet the objectives of reducing or eliminating pollutants in storm water discharges;

• There is a General Permit violation. If the LRWQCB determines that a Permit violation has occurred, the SWPPP shall be amended and implemented within 72 hours of notification, or as soon as additional materials can be obtained, if needed;

and

• When deemed necessary by the QSD, Design Engineer or Project Manager.

The following items shall be included in each amendment:

• Who requested the amendment;

• The description and location of proposed change;

• The reason for change;

• The original BMP proposed, if applicable; and

• The new BMP proposed, if applicable.

Approved amendments shall be uploaded into the SMARTS database and inserted into the appropriate section of the SWPPP or Appendix and a SWPPP Amendment Certification shall be kept with the SWPPP. The SWPPP text shall be revised, replaced, and/or hand annotated as necessary to properly convey the amendment. Additionally, the LRWQCB staff will be notified by email of all SWPPP Amendments once uploaded into SMARTS.

A blank copy of the SWPPP Amendment Certification and Approval form is located in Appendix A. A SWPPP Amendment log will be kept on-site with the SWPPP during construction operations. The SWPPP Amendment log form can be found in Appendix A.

Table 1 displays the changes that have been designated by the QSD as “to be field determined” and constitute minor changes that the QSP may implement based on field conditions. The QSP shall document these changes in the SWPPP Amendment log and document the reason they don’t need QSD approval.

Table 1. List of Changes to be Field Determined Candidate changes for field location or determination by QSD1

Changes that can be field located or field determined by QSP

Increase quantity of an Erosion or Sediment Control Measure √ Reduce disturbed acreage √ Relocate or add stockpiles or stored materials within mapped area

Locate or add portable toilets √ Relocate vehicle storage and/or fueling locations within mapped area

Relocate areas for waste storage √ Locate water drafting areas √ Minor changes to schedule or phases √ 1Any field changes not identified for field location or field determination by QSP must be approved by QSD.

II. Project Information

A. Project Description, site address and driving directions The UTR is the largest river system draining into Lake Tahoe, with a roughly 54 square mile watershed that extends from the southern edge of the Lake Tahoe Basin at Luther Pass to the shoreline of Lake Tahoe. Elevations in the project area range from 6,240 to 6,400 feet above sea level. The UTR Reach 5 project area includes approximately 290 acres of meadows, wetlands, uplands, riparian, and conifer forest (Figure 1 and 2, Appendix C). The meadow hydrology is supported by the river and several ephemeral drainages along the eastern boundary at the slope break adjacent to the neighborhood.

The project site is accessed off Highway 50 through the former Sunset Stables property. Travel approximately ¼ mile south of the Lake Tahoe Airport entrance and make a left into the Sunset Stables gate. Or travel approximately 1 mile north on Highway 50 past the Elks Club Road junction. The Sunset Stables property is managed by the CTC, and the gate into the property is kept locked.

The UTR Reach 5 Restoration Project will restore geomorphic function and aquatic habitat to approximately 1.5 miles of the Upper Truckee River that is impaired as a result of previous land uses in the area, including airport, highway and bridge construction. Restoration will be achieved via construction of a new river channel sized to convey a lesser flow of 375 cubic feet per second (cfs) in order to increase the frequency and duration of overbanking and associated sediment deposition in the floodplain and still carry the expected bed and suspended sediment loads. This will reduce overall loading of fine sediment to Lake Tahoe by decreasing rates of channel erosion and increasing deposition of fine sediment produced from the upper watershed onto the floodplain. The utility relocation component of the project involves lowering the STPUD water line and backup treated effluent line where the new channel crosses these lines to avoid potential conflicts with the buried lines and the new channel bed elevation.

B. Estimated Phasing and Implementation Schedule This SWPPP is for implementation of the UTR Reach 5 Restoration and Utility Relocation Project on USDA Forest Service and California Tahoe Conservancy (CTC) lands, including 4 phases expected to require 4 years or grading seasons to implement; Phases I and II (i.e. Years 1 and 2) for new channel construction and utility line relocation, Phase III (Year 3) for revegetation irrigation and new channel seasoning, and Phase IV (Year 4) for construction of new and existing river connections, backfilling the existing channel and grading the northern floodplain area. The estimated schedule for each phase is provided in Appendix J and summarized below.

Ground disturbing activities are anticipated to begin in summer of 2013 after groundwater levels within channel construction zones are adequately low and the meadow is sufficiently dry to prevent unnecessary compaction and rutting. From previous groundwater data, this is estimated to occur around July 1. Modifications of the schedule may be necessary if groundwater levels do not conform to expectations. For example, in a dry year grading operations may begin before July 1, but in a wet year grading operations may start later.

Approximately 4,000 linear feet of channel is planned for construction in the first season.

Another 3,300 feet of channel would then be constructed during Phase II in the 2nd year of implementation, along with the utility line relocation work. During Phase III, expected in the 3rd year of implementation, the new channel sections completed in the first two phases will be irrigated and seasoned with no additional earthwork anticipated. The final phase expected in the 4th year of implementation (or a later date if vegetation needs additional seasoning to meet restoration performance criteria or flows are unusually high) channel tie-ins and grade control structures will be built, live flow will be introduced to the constructed channel, and the existing channel will be backfilled. For a detailed sequence of events refer to Appendix E, Section IV, Part 1.4 of the Technical Specifications.

Generally, during each phase installation of site protection and temporary erosion and sediment control devices will be followed by clearing, vegetation salvage and grading.

Installation of the temporary bridge and temporary access road is anticipated to begin in mid to late June each construction season, with the exception of Phase III where the temporary construction access road and river crossing(s) will not be needed for irrigation activities. The temporary culvert crossing to the north would be constructed later in the season during Phases

II and IV only, when flows in the channel are around 30 cfs (anticipated late July or early August). Any wet areas that remain along the temporary access road alignment will be identified in the field during the Pre-Grade inspection with the LRWQCB and Tahoe Regional Planning Agency (TRPA) and protected with encapsulated road or an approved alternative prior to heavy equipment and/or haul trucks entering those areas. Spur routes made of construction mats will be utilized periodically along the temporary access road to access the new river construction area and minimize disturbance to the meadow surface.

Access needed for pick-up trucks used to install and operate the temporary irrigation system and re-engage the upland dewater basins if needed during the seasoning year (Phase III) will be primarily along the STPUD easement, and will only occur when the meadow is dry enough to avoid creating ruts from driving on the meadow surface along the easement. Access outside of the STPUD easement to the upland dewater basins would be with quads, and would be limited to 2 passes early in the season to stage materials and 2 passes late in the season to remove those materials prior to winter. Upland dewater basin materials may be stored onsite overwinter to facilitate their installation and activation in Phase III. Ground disturbing activities in the first and second year of construction will be located outside of the existing river channel, and therefore will not require diversions except during the temporary culvert crossing installation and removal in Phase II. During the final phase, expected to occur in the 4th year, diversions will be constructed according to the details in Appendix E, Section II, Part 1.3 of the Technical Specifications and plans in Appendix D Sheets C-5 and C-6 in order to connect the new channel to portions of the existing channel.

The Utility Line Relocation Contractor will excavate and lower the STPUD water line and backup treated effluent line sections in August and September of 2014 as part of Phase II per the plans in Appendix F. The backup treated effluent line will be lowered first, and after the Utility Line Relocation Contractor has finished, the LTBMU will construct the new river channel above the excavation area. The water line will be lowered next, following the Labor Day weekend to avoid any disruption of water service during a high use period. The new channel segment above the water line will be constructed by the LTBMU after the Utility Line Relocation Contractor is finished lowering the line.

Phase IV final connections will be initiated after a determination has been made that adequate vegetative growth and coverage has occurred to provide necessary bank roughness and satisfactory plant health and vigor exists to perpetuate continued growth and establishment.

This determination will be made in consultation with the project design team and permitting agencies.

All ground disturbing activities are anticipated to be completed by October 1 of each active construction season in order to allow time for temporary access road and river crossing removal prior to October 15. All winterization and permanent stabilization BMPs will be implemented before October 15 of each implementation year.

C. WDID

Current WDID under Board Order No. R6T-2011-0019: ______________

The current WDID under Board Order No. R6T-2011-0019 will be added as a SWPPP Amendment as specified in the Required Changes section of this document.

D. Potential Construction Site Pollutants of Concern and Sources The following is a list of construction materials that will be used and that have the potential to contribute pollutants, other than sediment, to storm water runoff:

• Vehicle fluids, including oil, grease, petroleum and coolants;

• Pipe coating materials;

• Chlorine disinfected water;

• Concrete waste;

• BMP materials (sandbags, geotextile fabrics, ¾ inch aggregate base);

• Hydromulch and tackifier; and

• General litter.

The following is a list of construction activities that have the potential to contribute sediment to storm water discharges or the UTR:

• Clearing and grubbing operations, including tree removal activities;

• Installation and removal of temporary river crossings;

• Installation and removal of diversion dams;

• Excavation and grading operations;

• Soil and rock import operations;

• Channel and floodplain installations;

• Jetting placed gravels and rock materials;

• Pipe removal and flushing operations;

• Dewatering and stream diversion operations; and

• Channel flushing operations.

E. Site Location Maps The construction Site Maps showing the project location, geographic features, construction site perimeter, staging areas and general topography are located in Appendix C and in the Construction Plans in Appendices D and F accordingly for the restoration and utility relocation components of the project. For ease of use, Table 2 below identifies the figure or map where the required elements are illustrated.

Table 2. Required Map Information Included on Map/Sheet No. Required Element Appendix C Figure 1 Appendix D Construction Plans (CP) Sheet A- Appendix F, CP Sheets A-1 and A-2

Project Location Map Project construction limit boundaries

Appendix C Figure 2 Appendix D, CP Sheet C-4, C-5 and C-6 Appendix F, CP Sheet C-2 and C-3

Equipment and materials stockpile areas Vehicle and equipment access, fueling, cleaning, storage and service areas Appendix C Figure 2 (all vegetation to be preserved outside of DSAs with exception of tree removal areas).

Tree removal areas on Appendix D, CP Sheet C-4

Existing vegetation to be preserved Disturbed Soil Areas (DSAs)1

Appendix C Figures 1 and 2 Surface water locations, including SEZ boundaries, 100-year floodplain, ephemeral and intermittent waterways, springs and wetlands

Appendix D, CP Sheets C-4, C-5 and C-6 Appendix F, CP Sheets C-2, C-3, C-4 and D-5

BMP locations

NA, see Appendix D, CP Sheet C-6 staging area map for drainage features included with separate Staging Area permit

Existing storm water structures and controls

Appendix C Figure 2 (includes entire site) Appendix D, CP Sheets C-2, C-3, C-4, FP-1 and FP-2 (detail on grading and access disturbance) Appendix F, CP Sheet C-3 (detail on utility trenching areas)

Disturbed Soil Areas1

Appendix C Figure 2 Drainage patterns and slopes anticipated after major grading activities

Appendix D, CP Sheets C-2, C-3 and C-5

Post-construction storm water structures and controls

Appendix C Figure 1 Locations of designated storm water discharge sampling

1DSA maps will be kept updated to reflect site conditions.

III. Best Management Practices

Where the Upper Truckee River Reach 5 Restoration and Utility Relocation Technical Specifications found in Appendix E and G conflict with information in this SWPPP, the information provided in this document shall override the Technical Specifications.

A. Site Management Construction site management shall consist of controlling potential sources of water pollution before they come in contact with storm water systems or watercourses. Appropriate site management measures shall be implemented to control material pollution and manage waste by implementing effective handling, storage, use and disposal practices. Additionally, many non-storm water pollution control BMPs (below) are necessary for proper site management.

Waste management and materials pollution control BMPs shall be implemented to minimize storm water contact with construction materials, wastes and service areas and to prevent materials and wastes from being discharged off-site. The primary mechanisms for storm water contact that shall be addressed include:

• Direct contact with precipitation

• Contact with storm water run-on and runoff

• Wind dispersion of loose materials

• Direct discharge to the Upper Truckee River through spills or dumping

The following Waste Management and Materials Pollution Control BMP table (Table 3) lists the BMPs that shall be implemented to handle materials and to control construction site wastes associated with these construction activities. CASQA Fact Sheets for Waste management and Materials Pollution Control BMPs are provided in Appendix B. Additionally, Table B-1 identifies which BMPs apply to specific activities.

Table 3. CONSTRUCTION SITE MANAGEMENT WASTE MANAGEMENT AND MATERIALS POLLUTION CONTROL BMPs

CASAQ

Fact Sheet BMP Name

Minimum Require-ment1

BMP Used If Not Used, Why YES NO

WM-1

Material Delivery and Storage

WM-2 Material Use √ √

WM-3 Stockpile Management √ √

WM-4 Spill Prevention √ √ and Control

WM-5 Solid Waste Management √ √

WM-6

Hazardous Waste Management

WM-7

Contaminated Soil Management

No contaminated soil on site

WM-8 Concrete Waste Management √ √

WM-9

Sanitary/Septic Waste Management

WM-10 Liquid Waste Management √

1Applicability to a specific project shall be determined by the QSD.

The following list of BMPs and the associated narrative explain how the selected BMPs will be incorporated into the project. Where CASQA Fact Sheets contradict information contained in the Technical Specifications or Construction Plans (CP), the more stringent criteria (as determined by the Project Manager) shall apply.

WM-1, WM-2 Materials Delivery, Storage and Use In general, BMPs shall be implemented to help prevent discharges of construction materials during delivery, storage and use. The general material storage area will be located in the staging area as shown in Appendix D, CP Sheet C-6, which is covered under a separate SWPPP and construction permit (WDID #6A09LT000021). The stockpiles will be located to avoid run-on.

Material will be stored on the constructed aggregate base (AB) pad at the staging area to prevent the spread of noxious weeds. In addition, drainage ditches and infiltration basins were constructed along the downslope edge of the AB pad to collect runoff from the 20-yr design storm of 1 inch in 1 hour. If the QSP determines there is a risk of run-on, a barrier shall be installed along the upslope edge of the AB pad.

WM-3 Stockpile Management Stockpile Management is covered under a separate SWPPP and construction permit (WDID

#6A09LT000021).

The trees removed from the new channel and access road alignment to be used in channel bank treatments and floodplain roughness features will be stored temporarily along the temporary access and spur roads. The storage of this material will not exceed 2 weeks at any one location.

WM-4 Spill Prevention and Control Spill Prevention and Control shall be implemented to contain and, if necessary, clean-up spills associated with any equipment refueling or repair activities to prevent material discharges to groundwater, streams or waterways.

WM-5, WM-6 Solid and Hazardous Waste Management Solid Waste Management and Hazardous Waste Management BMPs shall be implemented to minimize storm water contact with waste materials and prevent waste discharges. Solid wastes (trash) shall be disposed offsite daily. If onsite storage is necessary, solid wastes shall be stored inside a covered and locked storage container at the Sunset Stables staging area.

Liquid hazardous waste shall be disposed of offsite the same day it is generated. If it is necessary to store liquid waste, it will be stored in the same storage container referenced above. Hazardous wastes shall be contained in appropriate and clearly marked containers and segregated from other non-waste materials. All hazardous waste shall be stored, transported and disposed as required.

WM-8 Concrete Waste Management A limited amount of concrete will be used by the Utility Line Relocation Contractor to encase the new water and backup treated effluent utility line segments. The Contractor will be required to provide a portable, covered EPA compliant concrete washout container with sufficient capacity to collect the concrete slurry and waste that may result from washing of concrete trucks and equipment during utility line encasement operations. The portable concrete washout will be located either at the Sunset Stables staging area or placed on a construction mat within Utility Relocation areas A and B a minimum distance of 50 feet from the UTR and have adequate signage.

WM-9 Sanitary and Septic Wastes A portable toilet shall be located and maintained at the staging area for the duration of the project. A second portable toilet will be onsite at all times on a trailer so that it can be mobile.

This mobile portable toilet will be located along the encapsulated road sections, or pullouts, or along the nearby neighborhood roads during workdays so that it remains close to where the daily operations are occurring. The mobile toilet will be stored at the staging area on nights and weekends. Weekly maintenance shall be provided and wastes shall be disposed offsite. The toilet shall be located away from concentrated flow paths and shall not interfere with traffic flow.

All necessary precautions will be followed during the Utility Line Relocation work to avoid any leaks of treated effluent, including lining construction trenches in plastic and disposing of the material that is inside the treated effluent line into an onsite manhole.

WM-10 Liquid Waste Management The only liquid waste anticipated to be generated from this project is water that may have elevated turbidity. However, it is possible that drinking water (containing chlorine) or treated effluent could be encountered during the lowering, flushing and disinfection operations on the relocated utility lines. The strategy to treat turbid water is described in Appendix E, Section II, Part 1.2 of the UTR Channel Restoration Technical Specifications and Appendix G Section 01 57 00 of the UTR Utility Line Relocation Technical Specifications. In the event that chlorinated water or treated effluent is encountered during utility relocation contracted work, the process for treating this material is detailed in Appendix G, Section 33 13 00 of the Utility Relocation Technical Specifications.

Liquid Waste Management BMPs shall be implemented during irrigation, channel flushing, stream diversion activities, temporary culvert crossing installation and removal, road wetting, utility relocation work or any other operation that has the potential to generate runoff. It is expected that most liquid waste (water that may have elevated turbidity levels) will be dispersed and infiltrated in the meadow dewatering areas or upland dewater basins shown in Appendix D, CP sheets C-5 and C-6.

B. Sediment and Erosion Control

Erosion Control Erosion control is any source control practice that protects the soil surface and prevents soil particles from being detached by rainfall, flowing water or wind. Erosion control consists of using project scheduling and planning to reduce soil and/or vegetation disturbance, controlling drainage away from disturbed areas and preparing and stabilizing disturbed soil areas.

This construction project will implement the following practices to provide effective temporary and final erosion control during construction:

• Preserve existing vegetation where required and when feasible;

• Control the area of soil disturbing operations such that erosion control BMPs (Table 4) can be quickly and effectively implemented or the site can be permanently stabilized in that area;

• Stabilize non-active areas within 14 days of cessation of construction activities and for winterization at the end of each construction season; and

• Apply permanent erosion control measures to remaining disturbed soil areas prior to the completion of construction.

Sufficient erosion control materials (i.e. filter fabric, straw wattles, plastic sheeting, etc.), equivalent to approximately an additional 10% of what is required for the project, shall be maintained onsite to allow implementation and upkeep in conformance with this SWPPP. This includes implementation requirements for active and non-active areas that require deployment before the onset of rain.

The following erosion control BMP selection table (Table 4) includes the BMPs that shall be implemented to control erosion during construction. CASQA Fact Sheets for temporary erosion control BMPs are provided in Appendix B.

Table 4. EROSION CONTROL BMPs

CASAQ

Fact Sheet BMP Name

Minimum Require-ment1

BMP Used If Not Used, Why YES NO

EC-1 Scheduling √ √

EC-2

Preservation of Existing Vegetation

EC-3 Hydraulic Mulch √

EC-4 Hydroseed √ Using other revegetation methods

EC-5 Soil Binders √ Not necessary

EC-6 Straw Mulch √ Using wood or meadow mulch

EC-7 Geotextiles and Mats

EC-8 Wood Mulching √

EC-9 Earth Dikes and Drainage Swales √

EC-10

Velocity Dissipation Devices

EC-11 Slope Drains √ Not necessary

EC-12 Stream Bank Stabilization √

EC-14 Compost Blankets √ Not necessary

EC-15 Soil Preparation- √

Roughening

EC-16 Non-Vegetated Stabilization √ √

WE-1 Wind Erosion Control

The following list of BMPs and narrative explain how the selected BMPs will be incorporated into the project. Where CASQA Fact Sheets contradict information contained in the Technical Specifications or the Construction Plans, the more stringent criteria (as determined by the Project Manager) shall apply.

EC-1, EC-2 Scheduling and Preservation of Existing Vegetation Controlling the timing of construction activities through project phasing will be used to prevent excessive compaction, erosion and sediment delivery. Generally, surface disturbing activities will begin after June 1 and continue no later than October 15, depending on stream flow, ground water levels and weather conditions. Grading activities are anticipated to be completed by October 1 each year, with temporary access road removal and winterization taking place from October 1 to October 15.

The project schedule will sequence construction activities with the installation of soil stabilization and sediment control measures. BMPs will be deployed in a sequence to stay ahead of grading and construction activities progress. The construction sequencing will be arranged as much as practicable to leave existing vegetation and other ground cover undisturbed until immediately prior to grading. A pre-grade inspection will be conducted of the site BMPs with LRWQCB and TRPA for approval prior to initiating any earthwork activities at the start of each year’s construction.

Because construction activities won’t begin until after June 1, and likely in mid-June to early July each year, groundwater levels are expected to be low enough to prevent unnecessary compaction or disturbance due to equipment traffic. However, where the soil moisture conditions are still wet or noxious weeds are present, temporary access road sections through the SEZ areas will be constructed of encapsulated road per Appendix D, CP Sheet D-7 Detail 4 or an approved alternative. The remaining access road sections will be located directly on the meadow surface with orange boundary fencing to delineate the maximum 20 foot access width (maximum 40 feet at turnouts) in order to minimize vegetation disturbance.

In order to preserve the existing vegetation along the access road (where encapsulated road is not used), sod and willow clumps in the alignment of the temporary access road will be salvaged and used for bank and floodplain revegetation treatments. These disturbed areas will be stabilized with wood mulch, and Coir logs will be installed as BMPs along the river side of the road alignment as winterization per Appendix D, CP Sheet C-4 General Note 10. At the completion of all construction activities, the temporary road alignment will be ripped and revegetated according to Appendix D, CP Sheet C-4 General Note 11.

A portable, temporary spur road system made of DuraDeck, or equivalent product, construction mats will be used to create construction access over the meadow surface from the temporary access road to the new channel construction area. The encapsulated road (or approved alternative) segments and Duradeck spur roads will preserve the underlying meadow vegetation and minimize ground disturbance.

EC-3, EC-8 Hydraulic Mulch and Wood Mulching Wood mulch may be used on dry portions of the temporary access road that are not constructed as encapsulated road (or an approved alternative) to reduce the potential for erosion and as a dust abatement measure. Wood mulch would also be applied in these areas along the temporary access road at the end of each construction season as a winterization measure, and for this purpose would be applied to a depth of 3-6 inches. Additionally, wood mulch may be used in combination with ripping and seeding to stabilize and provide cover for the floodplain grading area where salvaged vegetation is not available. In this circumstance, wood mulch would be applied so that 10% to 15% soil surface visibility remained to facilitate seed growth.

EC-7 Geotextiles and Mats A geotextile fabric will be used for the temporary culvert crossing to protect the channel bed and banks during installation and removal of the crossing and during its use. Also, polyethylene covers will be used to cover the top surface of the temporary culvert crossing prior to forecast storm events. These covers will be anchored to prevent damage by wind. Water tight polyethylene sheeting will also be used to encapsulate the coffer dams used for the river diversions and flushing operations.

Filter fabric will be used in the encapsulated haul road installations (if this temporary access road technique is used) to contain the road fill material and treat any sediment laden runoff that may result from the compacted temporary road.

Finally, erosion control fabric, alone or in combination with rock protection, will be used to stabilize the banks at the temporary culvert crossing location during over-wintering and inactive periods until the final phase when the existing channel is backfilled.

EC-9 Earth Dikes and Drainage Swales Earthen material will be left in place between each constructed segment of new channel to facilitate the controlled flushing of each segment. These may be reinforced with water-filled berm or sandbag coffer dams.

In addition, raised vegetated strips will be constructed along the existing channel backfill to create additional long-term floodplain roughness and prevent flood waters from concentrating along this alignment.

EC-10 Velocity Dissipation Devices Velocity dissipation devices will be used at the outlet of temporary stream crossings and clear water diversions where the concentrated flow has the potential to disturb and mobilize streambed material. These devices will be constructed of sandbags and/or rock (6”-12”) placed on the streambed. Velocity dissipation devices will also be used at the hose or diversion outlet while flushing the new channel.

In addition, velocity dissipation devices will be used at the outlet of hoses pumping water to the upland dewater basins.

EC-12 Stream Bank Stabilization A primary purpose of the UTR Reach 5 Restoration Project is to construct an appropriately sized and stable river channel with a more engaged and dynamic floodplain system within the project area. Several bed and bank treatment measures are prescribed for the new channel sections in order to maintain long term stability and minimize erosion as shown in Appendix D, CP Sheets C-2 and C-3.

Temporary stream crossings, whether bridge or culverts, will be removed at the end of each construction season for winterization. Disturbed stream banks at and adjacent to the temporary stream crossings following crossing removal at the end of Phases I and II will be stabilized with Coir 700 or similar erosion control fabric and/or with rock rip rap for winterization each year. The temporary bridge will be installed at the location of an existing paved ford crossing, where the pavement extends beyond the top of the channel banks. This pavement will not be disturbed as part of the project, and no bank disturbance is anticipated associated with temporary bride installation or removal.

At the end of Phase 4 construction, the entire existing channel will be backfilled, including those areas disturbed by the temporary culvert crossing. The locations of the temporary bridge abutments will be permanently stabilized after removal of the bridge during the final construction year.

EC-15 Soil Preparation / Roughening Compacted areas to be decommissioned at the end of implementation will be roughened to increase water infiltration capacity and prepare the surface for revegetation. This will be accomplished by ripping the soil to a depth of 6-12 inches. Areas that are anticipated to be roughened in this way include non-encapsulated (unprotected) portions of the temporary access road.

EC-16 Non-Vegetated Stabilization The newly constructed channel will receive stream substrate to construct the riffles (riffle material specifications are found in Appendix D, CP sheets D3 and D4 and note 27 on sheet A2).

Riffle gravels will be clean washed material, or will be sorted and flushed to meet the water quality requirements for the project. Constructed riffles will provide long-term grade control and channel bed stabilization.

Large wood and rock will be used for bed and bank installations in selected areas as grade control and to stabilize stream banks where the new channel ties into the existing channel, and where it is over or close to buried utilities, the airport runway, or the existing channel. Rock, alone or in combination with erosion control fabric, will also be used to stabilize the banks at the temporary culvert crossing location during overwintering and inactive periods.

Wood mulch will also be used to prevent erosion of disturbed soil areas, as described above

(EC-8).

WE-1 Wind Erosion Control Water shall be applied to disturbed soil areas to control dust. The water will be applied using water trucks or pumped directly from the stream channel. Wind Erosion Control and Liquid Waste Management (WM-10) BMPs will be implemented to provide dust control and prevent discharges from dust control activities and water supply equipment. Water application rates will be minimized as necessary to prevent runoff and ponding. Watering equipment leaks will be repaired as soon as possible.

Dust control will be applied as needed in stockpile/staging areas, along temporary access roads, and at the site of grading activities. In general, if airborne dust can be visibly detected, water will be applied to the area.

During windy conditions (forecast or actual wind conditions of approximately 25 mph or greater), dust control will be applied to all DSAs, including access roads, to adequately control wind erosion.

Sediment Control Sediment controls are structural measures that are intended to complement and enhance the selected erosion control measures and reduce sediment discharges from construction areas.

Sediment controls are designed to intercept and settle out soil particles that have been detached and transported by the force of water. Additional temporary sediment control materials, equivalent to 10% of the installed quantities on the site, will be maintained onsite throughout the duration of the project for implementation in the event of predicted rain, rapid response to failures, or emergencies, as described below. This includes implementation requirements for active areas and non-active areas before the onset of rain. The following sediment control BMP selection table (Table 5) includes the BMPs that shall be implemented to control sediment on the construction site. CASQA Fact Sheets for sediment control BMPs are provided in Appendix B.

Table 5. SEDIMENT CONTROL BMPs

CASAQ

Fact Sheet BMP Name

Minimum Require-ment1

BMP Used If Not Used, Why YES NO

SE-1 Silt Fence √ √ SE-2 Sediment Basin √ SE-3 Sediment Trap √ Not necessary SE-4 Check Dam √ Using other methods SE-5 Fiber Rolls √ √ SE-6 Gravel Bag Berm √ Not necessary

SE-7 Street Sweeping √

Using stabilized construction entrance (TC-1) and will sweep the paved entrance when necessary

SE-8 Sandbag Barrier √

SE-9 Straw Bale Barrier √ Not necessary

SE-10 Temporary Drain Inlet Protection √ Not necessary

SE-11 ATS √ Not necessary

SE-12 Temporary Silt Dike √ Not necessary

SE-13 Compost Sock and Berm √ Not necessary

SE-14 Biofilter Bags √ Using other methods

TC-1

Stabilized Construction Entrance and Exit

Addressed under separate staging area SWPPP and permit.

TC-2

Stabilized Construction Roadway

TC-3 Entrance Outlet Tire Wash √ Not necessary

1Applicability to a specific project shall be determined by the QSD.

The following list of BMPs and narrative explain how the selected BMPs will be incorporated into the project. Where CASQA Fact Sheets contradict information contained in the Technical Specifications or the Construction Plans, the more stringent criteria (as determined by the Project Manager) shall apply.

SE-1 Silt Fence Silt fences or straw wattles will be installed along the edges of the road at the entrance and exit to each temporary stream crossing (i.e. temporary culvert crossing and temporary bridge) to intercept run-off from the road. Additional installations may be required at the direction of the QSD or QSP.

SE-2 Sediment Basin Upland dewater basins will be constructed up from the existing ground. These basins will be constructed using a 4’ tall water-filled berm with impermeable liner extending 10 feet into the basin to seal and surround the area and provide water holding capacity (Appendix D, CP Sheet C-5 and Appendix E Specifications Section II, 1.2). Water will be pumped to these upland dewater basins and spread with sprinklers or a pipe outlet at an energy dissipation device.

These basins will be used for infiltration of construction water, and pumping will cease to each basin before its maximum capacity is reached.

If needed at the end of each construction season for winterization, or for added capacity during any construction year, the upland dewater basins will be drained in a controlled manner. They will be pumped down and conveyed in hoses to be spray irrigated onto revegetated areas along the new channel banks or onto dry areas in the meadow floodplain (including dewater irrigation cells). If the meadow is saturated or the new channel banks are not in need of irrigation, the water contained in the upland dewater basins would be pumped down and spray irrigated onto additional available open meadow areas along Reach 6 or unused upland dewater basins (such as Upland Dewater Basin South), which would have additional infiltration capacity having not been used previously that season.