Attachment_1_Specifications_(OLYM_319700).pdf

Construct Pressure Distribution Mound Septic System (PMIS 319700) Olympic NP Attachment 1: Specifications

CONSTRUCTION SPECIFICATIONS FOR

PRESSURE DISTRIBUTION MOUND SEPTIC SYSTEM,

QUINAULT VISITOR CENTER COMFORT STATION

Prepared by: Kerri Lynn Cook, P.E. Date: March 10, 2022 600 E. Park Ave.

Port Angeles, WA 98362

PART 1 – GENERAL

1.1 SUMMARY

A. The work described herein consists of the construction of a non-residential septic system sized for 625 gallons per day to support the Quinault Ranger Station / Visitor Center comfort station located at 902 North Shore Road, Amanda Park, WA 98526. The new system consists of a septic tank, pump chamber, and pressurized dispersal mound drainfield with pump control panel. Contractor shall verify that existing 125 amp breaker panel has capacity to accommodate existing comfort station lighting, outlets, and fan circuits as well as the new pump control panel.

B. System shall be installed by a qualified, licensed septic system installer certified by any county in Washington State, with proof of bonding and insurance. All electrical work shall be completed by a qualified, licensed electrician.

C. Pressurized dispersal mound septic system shall be constructed in accordance with Washington

Administrative Code (WAC) 246-272A Onsite Sewage Systems as well as the following guidance documents:

1. Recommended Standards and Guidance for Performance, Application, Design, and

Operation & Maintenance: Mound Systems by Washington State Department of Health (May 2020)

2. Recommended Standards and Guidance for Performance, Application, Design, and Operation & Maintenance: Pressure Distribution Systems by Washington State Department of Health (July 2012)

D. Contractor shall provide portable toilets and a hand sanitizing station from June 15, 2022 until the new septic system has been inspected, tested, and approved by the NPS design engineer for use. Toilets shall consist of two standard units and one Americans with Disabilities Act (ADA) compliant unit. Toilets shall be serviced a minimum of weekly. Exact location and placement of toilets shall be subject to review and approval by the Contracting Officer.

E. Contractor shall notify the NPS design engineer seventy-two (72) hours in advance of earth-disturbing activities associated with pressurized dispersal mound septic system installation for technical and layout assistance.

F. NPS design engineer and Contracting Officer must pre-approve any changes from the plans.

G. The performance period will be 90 days, from issuance of Notice to Proceed to substantial completion.

1.2 BASIS OF DESIGN

A. Project Location: Quinault Ranger Station / Visitor Center comfort station, 902 North Shore Road, Amanda Park, WA 98526.

B. Site & Design Characteristics:

1. Soil Type: Site soil conditions were investigated and found to be Soil Type 5 (primarily silt loam, including some clay loam with a moderate structure)

2. Daily Design Flow: 625 gallons per day (gpd)

3. Wastewater Characterization: Wastewater is expected to be residential strength, with

CBOD5 < 125 mg/L, TSS < 80 mg/L, and O&G < 20 mg/L. Wastewater is expected to meet Treatment Level E prior to mound application.

4. Treatment Level: Vertical separation at proposed septic drainfield location was > 24 < 36 inches with Soil Type 5, resulting in Treatment Level E – pressure distribution and a native soil hydraulic loading rate of 0.4 gal/sq ft/day.

5. System Type: Pressure Distribution Mound System

6. Tank Size: 2000 gal septic tank, 2000 gal pump tank

7. Setbacks: 10 ft from upgradient Quinault Fire / Rescue Cache foundation, >100 ft from well, >100 ft from Kestner Creek

8. Hydraulic Loading Rate: Mound filter media shall be ASTM C-33 (coarse sand), classified as Soil Type 2; therefore, hydraulic loading rate will be 1.0 gal/sq ft/day.

9. Infiltration Area: 625 gpd/1 gpd/sf = 625 sq ft

a. Bed Width: 7.5 ft (> 24 inches available soil depth to water table)

b. Bed Length: 625 sq ft / 7.5 ft = 83 ft

c. Bed Depth: 10 in (for 1-½ inch laterals in gravel)

10. Mound & Filter Media Dimensions

a. Filter Media Depth: 12 in (below gravel bed infiltrative surface)

b. Filter Media Slope: 3:1

c. Filter Media Length: 83 ft bed + [2 x 10 ft end slope] = 103 ft

d. Filter Media Width: 8.5 ft upslope + 8.5 ft downslope + 7.5 ft bed = 24.5 ft

11. Cap & Topsoil Depth: 18 inches at center and 12 inches at bed edges (unsettled)

12. Basal Area Required: 625 gpd/0.4 gpd/sf = 1562.5 sq ft

13. Basal Area Available: 103 ft x 24.5 ft = 2523.5 sq ft (available exceeds required)

14. Orifice Size & Spacing: 1/8 in, every 2 ft

15. Lateral Size: 1-½ in

16. Minimum Residual Pressure (squirt height): 2.18 psi (5 ft or 60 in squirt height)

17. Minimum Dosing Frequency: A timer-controlled system (timed dosing) is required and shall be set to dose the mound a minimum of four times per day when using ASTM C- 33 filter media.

18. Dose Volume: 26.3 gal (lateral volume) x 5 = 131.5 gal, or approximately 21% of design flow

19. Pump Run Time Per Dose: 2.4 min

20. Pump Sizing Requirements: 55.4 gpm at 30.8 feet TDH

21. Pump Chamber Surge Capacity: 416 gal (2/3 daily design flow)

22. Pump Chamber Emergency Storage Capacity: 625 gal (daily design flow)

1.3 DEFINITION OF CONTRACT LINE ITEMS

A. General: For all line items, no separate measurement will be made. Distribute costs for mobilization, demobilization, project management, overhead, profit, bond, and other administrative costs across all line items, as appropriate. Payment will be at the contract unit (lump sum) price.

B. Contract Line Item No. 1 – Construct Pressure Distribution Mound Septic System

1. This line item consists of furnishing all labor, materials, and equipment to provide a complete, fully functional and operational pressurized distribution mound septic system.

System shall be installed by a qualified, licensed septic system installer certified in the State of Washington in accordance with Washington Administrative Code (WAC) 246- 272A Onsite Sewage Systems and these construction documents. Specific elements include, but are not limited to, the following:

a. Demolish existing septic tank and drainfield infrastructure as required for installation of new components.

b. Construct mound disposal site with gravel infiltration area bed.

c. Install new septic tank, pump tank, transport line, and lateral distribution pipe, with all necessary appurtenances.

d. Conduct final testing to demonstrate system performance, provide onsite training for NPS staff, and complete closeout procedures including providing operation and maintenance documentation for NPS-prepared O&M Manual as well as providing red-line drawings for NPS-prepared Record Drawings.

C. Contract Line Item No. 2 – Complete Electrical Modifications for Pump Control

1. This line item consists of furnishing all labor, materials, and equipment to complete all electrical modifications required to provide a fully functional sewage effluent pump control system. Work to be completed by a qualified, licensed electrician includes, but is not limited to, the following:

a. Verify that existing 125 amp breaker panel has capacity to accommodate existing comfort station loads as well as new pump control panel.

b. Install new controls package including pump, float controls, and control panel.

c. Install quick disconnect and ensure proper configuration for separate pump and alarm circuits at main breaker panel.

D. Contract Line Item No. 3 – Provide Portable Toilets

1. This line item consists of providing two standard units and one Americans with

Disabilities Act (ADA) compliant unit from June 12, 2022, until the new septic system has been inspected, tested, and approved by the NPS design engineer for use. Toilets shall be serviced a minimum of weekly.

1.4 CONTRACTOR USE OF SITE

A. General: Contractor shall have limited use of the site for construction operations. Do not disturb portions of project site beyond areas in which the septic work is indicated. Minimize impacts to visitors and visitor access to the Quinault Visitor Center.

1. Access: Access to the tank site shall be from the paved Quinault Visitor Center parking lot. Access to the drainfield site shall utilize the non-public gravel access road between the Visitor Center and the Fire / Rescue Cache buildings. The gravel parking area adjacent to this access road may be used as a staging area, as indicated on the Vicinity Map in the drawings.

2. Limits: Confine constructions operations to within the designated perimeter of the site as specifically delineated on the construction drawings and flagged or staked onsite.

Erect temporary construction fence or protective barrier around the proposed mound and adjacent area to assure area is not damaged by construction activity before installation of the mound system.

3. Ensure all surface water remains diverted from the drainfield area for the duration of construction. Erosion control measures shall follow the approved Under-an-acre Pollution Prevention Plan (UPPP).

4. No unattended motor or engine operation is permitted. No idling of motors or engines for extended periods of time is permitted.

5. Utilities to support construction activities by contractor:

a. Water: Contractor may use water from existing facilities while working directly on the facilities. Acceptable uses are for activities associated with direct construction and testing of the project.

b. Power: Contractor may use electric power from existing facilities while working directly on the facilities. Acceptable uses are for equipment associated with direct construction of the project, and for electrical connection to and testing of the project.

B. Construction Time Period: Timing of work shall be coordinated with the Contracting Officer and follow the approved Contractor’s work schedule. Soil-disturbing activities associated with septic mound construction shall occur when soils are adequately dry, typically between July 1 and October 1. Work conducted during the April 1 through September 23 marbled murrelet nesting season that produces above-ambient noise shall occur between two hours after sunrise and two hours before sunset. Work shall generally be performed between the hours of 7:00 AM and 5:30 PM, Monday through Friday and not on federal holidays, except when otherwise indicated or as approved by the Contracting Officer.

C. Staging and Storage of Materials: Confine storage of equipment and materials to within the staging area as described and delineated on the construction drawings, or as designated by the Contracting Officer. Remove all materials, including trash and food wastes, from the project site to reduce the attraction of murrelet predators such as crows and jays. Project area shall be kept free of trash at all times.

D. Preservation of Natural Features:

1. Sources for all imported rock, sand, gravel, and soil shall be inspected for invasive non-native plants, weeds, and/or seeds. Material must not be stockpiled at the quarry for more than 1 week after washing. If material comes from older stockpiles, the quarry must be certified weed-free by the County Noxious Weed Coordinator or a qualified weed inspector designated by NPS. For details on obtaining pit inspections and topsoil specifications, contact the Contracting Officer and provide at least 14 days’ notice that an inspection is needed. Imported material shall be free of non-native weeds and/or seeds. Imported material shall be shipped directly from the source to the Park without intermediary storage or staging. Shipping vessels shall be covered, if necessary, to prevent spillage or blowing off their contents while in transit.

2. Prevent damage to natural surroundings. Restore damaged areas, repairing or replacing damaged trees and plants, at no additional expense to the Government.

3. Provide temporary barriers to protect existing trees and plants and root zones. Where drainfield expansion intersects root systems of larger trees, cut all roots greater than 3 inches in diameter cleanly with a sharp tool (i.e. do not tear with the excavator).

4. Do not remove, injure, or destroy trees or other plants without prior approval.

5. Do not fasten ropes, cables, or guys to existing trees.

6. Carefully supervise excavating, grading, filling, and other construction operations near trees to prevent damage.

E. Park Regulations:

1. Implement and comply with federal and local COVID requirements in effect during the contract period of performance.

2. No Smoking Policy: Smoking is prohibited inside or outside within 25 feet of any buildings in the park. Discarding tobacco products or debris anywhere other than into designated tobacco receptacles is considered littering and subject to fines.

3. Fueling & Spills: Fueling of any type, whether equipment or vehicles, must be done either on non-pervious surfaces such as concrete or asphalt, or deploy a spill containment pad. Hazardous spill clean-up materials shall be onsite at all times to avoid/minimize the introduction of chemical contaminants associated with machinery used in project implementation. Equipment must be free of any fluid leaks (fuel, oil, hydraulic fluid, etc.) upon arrival at the worksite and shall be inspected at the beginning of each shift for leaks prior to the commencement of work. Leaking equipment shall be removed off-site for necessary repairs before the commencement of work. The contractor shall be responsible for any cleanup efforts required by 40 CFR and all applicable state environmental quality laws regarding disposal and cleanup of hazardous/industrial wastes. The contractor must immediately notify the Contracting Officer of spills.

1.5 ARCHAEOLOGICAL PROTECTION

A. General: No archaeologically sensitive areas have been identified within the proposed project area, and there is no surface evidence of archaeological resources.

B. During the initial period of ground-disturbing activity in each general area, NPS will provide an archaeologist to monitor activities. Contractor shall notify the COR at least two weeks before beginning trenching or excavation of each new general area. NPS does not anticipate archeological monitoring of all ground-disturbing activities.

C. If unknown archaeological resources are discovered during construction, stop work immediately and report the discovery to the Contracting Officer. Work in that location shall stop or be relocated to a non-sensitive area until NPS properly records and evaluates the resources; measures should be taken to avoid further resource impacts or to mitigate their loss or disturbance. Please see and refer to the attached Inadvertent Discovery Plan (IDP). All on-site staff should be aware of this document and have easy access to it in case of a discovery

1.6 SUBMITTALS

A. General: Coordinate preparation and processing of submittals with the performance of construction activities. Review them for legibility, accuracy, completeness, and compliance with Contract Documents. Transmit each electronic submittal using the National Park Service CM-16 transmittal form. (This form can be downloaded from the Workflows website at http://www.nps.gov/dscw/con_subreview21.htm.) No action will be taken on a submittal item unless accompanied by the transmittal form.

http://www.nps.gov/dscw/con_subreview21.htm

B. Construction Schedule: The purpose of the Construction Schedule is to ensure adequate planning, coordination, scheduling, and reporting during the execution of work by the Contractor. The Construction Schedule will assist the Contractor and Contracting Officer in monitoring the progress of work, evaluating proposed changes, and processing progress payments, if necessary. After contract award and before the Pre-Construction conference, submit a baseline schedule, large enough to show entire schedule for entire construction period.

Include submittal review, construction start date, work activities, activity durations, major milestones, inspection dates, closeout activities, and project end date.

C. Schedule of Values: Break down each lump-sum item into component work activities used in the schedule, for which progress payments may be requested. The work activities broken out within the schedule of values shall be integrated into and made a logical part of the construction schedule. The total costs for the component work activities shall equal the contract price for that lump-sum item. The Contracting Officer may request data to verify the accuracy of dollar values. Include mobilization, general condition costs, overhead, and profit in the total dollar value of unit price items and the component work activities for each lump-sum item.

D. Accident Prevention Plan: After the contract award and before the Pre-Construction conference, submit for review an Accident Prevention Plan. The Contracting Officer will review the proposed Plan. If the plan requires any revisions or corrections, the Contractor shall resubmit the Plan within ten (10) days. No progress payments will be made until the Plan is accepted. The Plan shall be written to comply with OSHA and project requirements including but not limited to the following:

1. Name of the responsible supervisor to carry out the program.

2. Weekly and monthly safety meetings.

3. First aid procedures.

4. Outline of each phase of the work, the hazards associated with each major phase, and the methods proposed to provide for property protection and safety of the public, National Park Service personnel, and Contractor's employees. Identify the work included in each phase.

5. Appropriate personal protective equipment to be worn on the job site.

6. Training, both initial and continuing.

7. Planning for possible emergencies, such as floods, fires, cave-ins, slides, explosions, power outages, and windstorms. Such planning shall take into consideration the nature of construction, site conditions, and the degree of exposure of persons and property.

8. To the extent appropriate, Contractors should include the protective health and safety measures they intend to implement related to the COVID-19 pandemic. Include preventive measures the contractor intends to follow while performing work on government property as well as responsive and corrective actions to be taken if an employee exhibits symptoms or tests positive for COVID-19 or if the hazard mitigation strategies recommended by federal, state, and/or county health departments evolve.

E. Quality Control Plan: After the contract award and before the Pre-Construction conference, submit for approval a written Contractor Quality Control (CQC) Plan. If the plan requires any revisions or corrections, the Contractor shall resubmit the Plan within ten (10) days. The Government reserves the right to require changes in the plan during the contract period as necessary to obtain the quality specified. No change in the approved plan may be made without written concurrence by the Contracting Officer. The Quality Control Plan shall include:

1. A list of personnel responsible for quality control and assigned duties. Include each person's qualifications.

2. A copy of a letter of direction to the Contractor's Quality Control Supervisor outlining assigned duties. Note that Quality Control Supervisor duties may be in addition to other duties such as Site Superintendent, supervisor responsible for carrying out the Accident Prevention Plan, or similar.

3. Names, qualifications, and descriptions of laboratories to perform sampling and testing, and samples of proposed report forms.

4. Methods of performing, documenting, and enforcing quality control of all work.

5. Methods of monitoring and controlling environmental pollution and contamination as required by regulations and laws

6. Format for Contractor’s Quality Control Daily Reports. Form should show all inspections and tests and shall be submitted to the Contracting Officer on the first workday following the date covered by the report (preferred), or at least weekly.

Contractor’s Quality Control Supervisor may utilize the NPS Denver Service Center’s fillable .pdf Contractor Quality Control (CQC) Daily Report form (https://www.nps.gov/dscw/upload/CMR-CQC-DailyReport_2-6-18_AF.pdf), or any Contracting Officer approved form containing similar content.

F. Under-an-acre Pollution Prevention Plan: NPS Standards and Guidelines require that water quality be protected at all times to ensure compliance with the Organic Act. The Contractor shall prepare an Under-An-Acre Pollution Prevention Plan (UPPP) for each project resulting in less than 1 acre of soil disturbance or not otherwise subject to the requirements of the NPDES program. The UPPP template (https://www.nps.gov/dscw/upload/UnderAnAcre- UPPP_Template_3-30-16.docx) and guidelines (https://www.nps.gov/dscw/upload/UnderAnAcre-UPPP_Guideline_3-30- 16_AF_120417.pdf) are available online for download. After contract award and before the pre-construction conference, prepare and submit a UPPP in conformance with NPS guidelines and adherence to all applicable construction stormwater management practices.

Note that NPS will only approve use of wattles containing coir or aspen excelsior with fiber (not plastic) netting; no straw of any origin will be allowed onsite.

G. Product Data: Provide product submittals for the following items demonstrating conformance with these specifications for designer review and approval.

1. Tanks

2. Pump and control panel

3. Filter media

4. Coarse aggregate

5. Geotextile

6. Topsoil

7. Grass seed

1.7 CLOSEOUT PROCEDURES

A. Project Record Drawings: Maintain one complete set of contract drawings and one full-size set of vendor-supplied drawings. Mark changes, deletions, and additions to show actual construction conditions. Show additions in red, deletions in green and special instructions in blue. Submit complete record drawings upon completion of the total project.

https://www.nps.gov/dscw/upload/CMR-CQC-DailyReport_2-6-18_AF.pdf https://www.nps.gov/dscw/upload/UnderAnAcre-UPPP_Template_3-30-16.docx https://www.nps.gov/dscw/upload/UnderAnAcre-UPPP_Template_3-30-16.docx https://www.nps.gov/dscw/upload/UnderAnAcre-UPPP_Guideline_3-30-16_AF_120417.pdf https://www.nps.gov/dscw/upload/UnderAnAcre-UPPP_Guideline_3-30-16_AF_120417.pdf

B. Operation & Maintenance Data: Submit operation and maintenance (O&M) data including preventative maintenance schedules, product cut sheets, project-specific electrical wiring diagram, specific warranties, and similar documents. O&M data shall be compiled and submitted electronically to the Contracting Officer.

C. Demonstration & Training: Instruct NPS personnel in operation, adjustment, and maintenance of products, equipment, and systems. Coordinate timing of training with Contracting Officer to ensure appropriate NPS personnel can participate.

D. Substantial Completion & Final Inspection: When the project is substantially complete, request in writing a final inspection. Upon receipt of the written request that the project is substantially complete, the Contracting Officer will proceed with inspection within ten (10) days of receipt of the request or will advise the Contractor of items that prevent the project from being designated as substantially complete. If following final inspection, the work is determined to be substantially complete, the Contracting Officer will prepare a Punch List to be corrected before final acceptance and issue a Letter of Substantial Completion. The contractor shall complete the work described on the Punch List within thirty (30) calendar days, as weather permits. If the Contractor fails to complete the work within this time frame, the Contracting Officer may either replace or correct the work with an appropriate reduction in the contract price or charge for re-inspection costs following the Inspection of Construction clause of the contract. If, following final inspection, the work is not determined to be substantially complete;

Contracting Officer will notify the Contractor in writing. After completing work, the Contractor shall request a new final inspection. All re-inspection costs may be charged against the Contractor following the Inspection of Construction clause of the contract. After all deficiencies have been corrected, the CO will issue a Letter of Final Acceptance.

PART 2 - PRODUCTS

2.1 SEPTIC TANK & APPURTENANCES

A. Septic tank shall be a standard two-compartment 2000-gallon pre-cast concrete tank manufactured by Peninsula Tanks, Inc or approved equal.

1. General: Septic tank shall be listed on the Washington State Department of Health’s current List of Registered Sewage Tanks.

2. Baffles: Septic tank shall have inlet and outlet baffle tees, 4-inch diameter schedule 40 poly vinyl chloride (PVC), per drawings. Baffle tees shall extend above the liquid level to one inch below the top of tank.

3. Effluent Filter: Outlet baffle shall be equipped with EF-4 Residential Series Effluent Filter, manufactured by Tuf-Tite, or approved equal. Filter shall remove solids down to 1/16” for at least 800 gallons per day.

4. Riser Ports: Tank shall have two 24-inch diameter access ports that extend to finish grade, per drawings. Access ports shall have adapters cast into the concrete tank to create a structural, watertight joint for attaching risers to tank.

2.2 PUMP CHAMBER & APPURTENANCES

A. Pump chamber shall be a single compartment 2000-gallon concrete tank as manufactured by Peninsula Tanks, Inc or approved equal. Pump chamber shall be connected to septic tank in series by a single PVC pipe with a minimum diameter of four inches, per drawings.

1. General: Pump tank shall be listed on the Washington State Department of Health’s current List of Registered Sewage Tanks.

2. Baffles: Pump chamber shall have inlet baffle tee, 4-inch diameter schedule 40 poly vinyl chloride (PVC), per drawings. Baffle tee shall extend above the liquid level to one inch below the top of tank.

3. Riser Port: Tank shall have one 24-inch diameter access port that extends to finish grade, per drawings. Access port shall have adapter cast into the concrete tank to create a structural, watertight joint for attaching riser to tank.

2.3 RISERS AND LIDS

A. Access risers shall be PVC, 24” diameter, with 24” diameter gasketed high impact lid or better.

Risers shall have a permanent watertight seal with top of septic and pump tanks via a watertight cast in place PVC riser adapter. Lids shall be child and tamper resistant.

B. Risers are required for access to the internal vaults and access into the tanks for septage pumping or insertion of pumps and other equipment. The material shall be PVC as per ASTM D-1784 and tested following AASHTO M304M-89. All risers shall be constructed of non-corrosive material and designed to be buried in soil and constructed watertight. Inlet and outlet risers shall be similar to Orenco Systems®, Inc. Model Perma-Loc, Ultra-Rib, KOR FLO, or an engineer-approved equal.

2.4 PUMP & APPURTENANCES

A. General: Pump system components shall be part of a complete, integrated pump package for pumping effluent from the pump tank, Biotube® EasyPakTM 60-Hz Pump Package by Orenco (product code BEPCLK-P92-S15-10-60-SD4) or approved equal.

B. Submersible effluent pump shall be PVA Series 60-Hz, 4” PVA500511 manufactured by Orenco or equal.

1. Minimum delivery capacity: 55.4 GPM at 23.7’ TDH

2. Power requirements: single phase, 120 volts, 60 HZ, ½ HP

3. Discharge size & material: 2” diameter stainless steel

4. 16 AWG, 3-conductor Type SOOW 600-V motor cable (suitable for Class 1, Division 1 and Division 2 applications)

5. Run-dry capability

6. Built-in thermal overload protection

C. Pump vault shall be Biotube® EasyPakTM manufactured by Orenco or approved equal.

1. Filter mesh: 1/8-inch or smaller

2. Flow rate: 75 gpm

D. Discharge assembly shall be HV200BCX manufactured by Orenco or approved equal.

1. Size: 2” diameter

2. Options Included: Ball valve and check valve

E. ClickTight connector shall be used in lieu of internal splice box.

2.5 CONTROL PANEL

A. General: Control panel shall be part of a complete, integrated pump package system for timed dosing from the pump tank, Biotube® EasyPakTM 60-Hz Pump Package by Orenco (product code BEPCLK-P92-S15-10-60-SD4) or approved equal.

B. Control panel and controls shall be Orenco® ClickTightTM Controls Package (product code CLKP-S15-10-60-PA) consisting of ClickTight S electromechanical timed dose control panel with programmable timer or approved equal. Panel shall be wall-mounted on back (east) side of existing precast concrete CXT comfort station.

1. 120 VAC, 16 FLA, 1-phase, 60 Hz, 1HP Max

2. Include optional ClickTight pump adapter plug

3. UL Listed controls and components

4. Fiberglass NEMA 4X enclosure with stainless steel fittings

5. Manual / Off / Auto toggle switch operation

6. Visual and audible high liquid level alarm with push to silence

7. Built-in event counter and elapsed time meter

8. Programmable timer with variable controls for OFF and ON time periods

9. Pump timer on/off, redundant off with low level alarm, and override timer on/off with high level alarm float switches

10. Two dedicated, independent circuits (20 A for pump and 10 A for controls/alarm) from main distribution panel

11. Properly sized and rated conduit for ClickTight cable length between wall-mounted control panel and ClickTight connector inside pump tank riser

C. Float Switches: ClickTight (or approved equal) float control switches shall be mechanical, non-mercury switches that are cUL-listed and CSA-certified for use in sewage.

1. B Model (2 ea): normally open motor-rated float for pump and high level alarm switch applications

2. N Model (1 ea): normally closed signal-rated float for redundant off and low level alarm switch application

D. Fused AC Disconnect: To be located between the supply load-center (distribution panel) and pump control panel.

1. Galvanized steel enclosure (8”H x 5”W x 3”D minimum)

2. NEMA 3R rated

3. UL Listed

4. Single Phase

5. Eaton DPB22R or equal

E. All wiring must be completed by a qualified licensed electrician.

2.6 PIPE

A. Transport, manifold, and lateral pipe shall be schedule 40 PVC, solvent weld conforming to ASTM D 1785 or better. All fittings shall be schedule 40 PVC conforming to ASTM D 1785 or better.

1. Laterals: Orifices shall be 1/8 inch diameter, spaced 24 inch on center, to be installed in

6 o’clock position using a sharp drill bit.

2. Manifold/Lateral Connection: True union ball valves inside valve box for each lateral.

2.7 MOUND

A. Mound Filter Media: Filter media must meet the ASTM C-33 specification for particle size gradation shown below. Filter media used in constructing the mound must be accompanied by a written certification from the supplier that the sand fully conforms to the media specification as determined by ASTM D136 (dry sieving) and ASTM C-117 (wet sieving).

1. Particle size distribution:

Sieve Particle Size Percent Passing 3/8 in 9.50 mm 100 No. 4 4.75 mm 95 to 100 No. 8 2.36 mm 80 to 100 No. 16 1.18 mm 50 to 85 No. 30 0.6 mm 25 to 60 No. 50 0.3 mm 5 to 30 No. 100 0.15 mm 0 to 10 (prefer <4)

2. The sand must have not more than 45% passing any one sieve and retained on the next consecutive sieve of those shown above.

3. The fineness modulus must not be less than 2.3, nor more than 3.1. The fineness modulus is calculated by adding the cumulative percentages of the material in the sample retained in the sieves shown above and dividing the sum by 100.

4. The limit for material that can pass the No. 200 sieve must not be more than 3%.

B. Coarse aggregate: Drainfield rock shall be clean, durable, broken or crushed stones, or screened gravel, meeting the gradation requirements for coarse aggregate shown below.

Drainfield rock shall not contain more than one percent fines (passing the No. 200 sieve).

1. Particle size distribution:

Sieve Particle Size Percent Passing 2-1/2 in 63.5 mm 100 1-1/2 in 38.1 mm 85 to 100 3/4 in 19.0 mm 5 to 35 No. 4 4.75 mm 0 to 5 No. 200 0.074 mm 0 to 1

C. Geotextile: The geotextile shall be non-woven and satisfy requirements of AASHTO M-288-

06 for Class 1 applications. Fabric shall be free of any chemical treatment or coating which reduces permeability and shall be inert to chemicals commonly found in soil.

D. Valve Boxes: Provide for lateral flow control valves, standard sewer (green) cover color

E. Cover:

1. Topsoil: medium to fine sandy loam (no finer), medium texture.

2. Grass seed: lawn seed mix for Pacific Northwest sun and shade

a. Species included in mix shall be listed

b. Species shall not include Kentucky bluegrass or creeping fescue

2.8 MONITORING PORTS

A. Ports shall be constructed of 6 inch PVC pipe with removable screw type or slip caps. Either 3/8 inch or 1/4 inch rebar shall be used to anchor ports, per drawings.

PART 3 - EXECUTION

3.1 SELECT DEMOLITION

A. General: Conduct select demolition as needed to accommodate new construction. Preserve and protect elements not requiring removal for new construction.

1. Pump and remove septage from existing 1250 gallon concrete septic tank. Septage shall be removed by an approved pumper licensed by a local health jurisdiction in Washington State.

2. Remove existing septic tank, piping, and infiltrator chambers

3. Protect existing gravity pipe into existing septic tank; re-establish pipe into new septic tank with 1-2% slope.

4. Field-verify capacity of existing GE PowerMark Gold 125 amp breaker panel to accommodate new pump control panel with separate pump and alarm circuits.

3.2 SITE PREPARATION & CONSTRUCTION

A. General: The function of this preparation is to provide a cleared ground surface with a series of vertical channels to enhance transfer of moisture from the sand fill to the original soil, while inhibiting lateral movement at the sand-soil interface.

1. Check the moisture content of the soil at 7-8 inches deep. If it is too wet, smearing and compaction will result, reducing the infiltration capacity of the soil. Soil moisture can be determined by rolling a soil sample between the hands. If it rolls into a wire, the site is too wet to prepare. If it crumbles, site preparation can proceed. If the site is too wet, do not proceed until the soil moisture decreases.

2. Stake out the mound area on the site according to the system design, so the infiltration bed runs parallel to the contours. Reference stakes offset from the corner stakes are recommended in case corner stakes are disturbed during construction.

3. Measure the average ground elevation along the upslope edge of the bed and reference this to a benchmark for future use. This is necessary to determine the bottom elevation of the bed.

4. Determine where the pipe from the pump chamber connects to the distribution system in the filter media.

5. Trench and lay the effluent pipe from the pump chamber to the mound at a depth of 18”.

Cut and cap the pipe one foot beneath the ground surface. Lay the pipe below frost line (12”) and sloping uniformly back to the pump chamber so that it has the ability to drain after dosing.

6. Backfill and compact the soil around the pipe to prevent back seepage of effluent along the pipe. This step must be done before plowing to avoid compaction and disturbance of the surface.

7. Remove excess vegetation by mowing. Rake cut vegetation if it is, or will become, matted. Prepare the site using a spring-loaded agricultural chisel plow or approved equipment alternative and plowing parallel to the contours. Immediate construction after plowing is desirable. If it rains after plowing is completed, wait until the soil dries out before continuing construction.

8. Reset the corner stakes, if necessary, using the offset reference stakes and locate the bed or trench area by staking their boundaries.

9. Extend the transport pipe from the pump chamber (which had previously been cut off) to several feet above the ground surface.

10. Install monitoring ports (6 inch PVC with the bottom foot perforated, rebar and with gravel or a geotextile around the perforations) as shown in drawings. At least one must be in the downslope portion of the mound with the bottom at the original surface and the top extending above the final grade. Slotting the caps will facilitate removing the caps to allow access.

11. Place the filter media that has been properly selected around the edge of the plowed area.

Keep the wheels of the trucks off plowed areas. Avoid traffic on the downslope side of the mound system. Work from the end and upslope sides.

12. Move the filter media into place using a small track-type tractor with a blade. Do not use a tractor/backhoe having rubber-tired wheels. Always keep a minimum of 6 inches of filter media beneath tracks to prevent compaction of natural soil.

13. Place the filter media to the required depth, i.e. to the top of the bed. Shape sides to the desired slope (3:1).

14. With the blade of the tractor, form the infiltration bed. Hand level the bottom of the bed to within ± ½ inch.

15. Place the coarse aggregate in the bed. Level the aggregate to the design depth.

16. Place the distribution pipes, as determined from the pressure distribution guidelines, on the aggregate. Ensure any burs, chips, or cuttings from the orifice drilling process are removed from the piping prior to assembly. Connect the manifold to the transport pipe.

Slope the manifold to the transport pipe. Lay the laterals level, removing rises and dips.

17. Install monitoring ports as shown in drawings at the end of each lateral.

18. Pressure test the distribution system for uniformity of flow. Testing should verify that distribution is uniform with the required minimum residual pressure, that the system is dosed at the proper volume and frequency, and that the alarms are functioning properly.

a. Measure squirt height. For a 1/8” orifice size, minimum squirt height is 5’ or 60”.

b. Check uniformity of squirt height. Squirt height difference must not exceed 21% or

12.5” between orifices on any one lateral. Squirt height difference over the entire system must not exceed 32% or 19”.

c. Identify the time required to send a full dose to the drainfield. This can be done by running the system in manual. Be sure there is plenty of water in the pump chamber.

Timer run times provided by engineer must be field tested.

d. Using the time obtained above, verify that when the system runs automatically it runs the time required to send the proper dose to the drainfield.

e. Verify that the timer off time is the same as that specified in the plan or will dose the system the correct number of times per day. If the drainfield is to receive 4 doses per day, the off time should be approximately 6 hours.

19. Place 2 inches of aggregate over the distribution pipe. Do not cover system prior to inspection by NPS design engineer.

20. Place approved geotextile material over the aggregate. Ensure fabric covers the entire drainfield rock distribution media with a minimum one foot overlap between rolls.

21. Place the soil for the cap and topsoil on the top of the bed. An initial depth of 18 inches in the center and 12 inches at the outer edge of the bed is desired to ensure 12 inches in the center and 6 inches on the outer edge after settling. This creates a slope that assists with surface run-off of precipitation. Do not drive over the top of the bed as the distribution system may be damaged.

22. Sow grass seed for quick germination and adequate coverage over the mound system to prevent erosion.

3.3 SEPTIC AND PUMP TANKS

A. Septic and pump tanks shall be set level and not deeper than 24 inches below finish grade.

Bedding material shall be pea gravel or washed sand placed a minimum depth of 6 inches.

Backfill shall be in uniform, compacted layers not exceeding 2 feet thick. All bedding material shall be compacted with a mechanical tamper to the top of tanks.

1. Location: Septic tank must be a minimum of five feet (5’) from any building foundation.

2. Bedding: Tanks shall be placed on a 6-inch minimum bed of sand or pea gravel.

Additional instructions provided by the manufacturer shall be followed.

3. Risers: Septic tank shall have two 24-inch diameter access ports and pump chamber shall have one 24-inch diameter access port that extend to finish grade.

4. Effluent Filter: In septic tank, locate effluent filter housing such that filter cartridge can be easily removed via the access port.

5. Hydrostatic Testing: Backfill tanks to at least 2/3 height prior to conducting leak test.

Seal access openings, risers, and inlet/outlet pipes. Fill empty tank with water to a point 2” above the point of riser connection, to the top of the tank. Let tank stand for 1 hour.

If there is a measurable drop in water surface elevation, refill the tank and let stand for 1 hour. Tank passes water-tightness test once the water level is held for 1 hour without any measurable loss.

B. Sewage line carrying solids from the source to the septic tank shall slope between 1 percent

(1/8 inch per foot) and 2 percent (1/4 inch per foot).

3.4 CONTROL PANEL

A. Control panel shall be set with the following pump run parameters:

1. Programmable Timer Pump Settings (for pre-set cycle, starting with “off” cycle)

a. Pump On Time: 2.4 min (2 minutes, 24 seconds)

b. Pump Off Time: 308 min

2. Float Settings

a. High Level Alarm / Override Timer On & Off Float: This float should activate the alarm light and audible alarm when lifted. If should also turn on the pump when lifted and off when lowered. Consult with NPS design engineer for final float elevation.

b. Timer On & Off: This float should turn off the programmable timer when lowered.

When this float is lifted, the timer should be restarted. Note: The timer should start with its “off” cycle.

c. Redundant Off & Low Level Alarm Float: This float should turn off the pump when lowered. This float is a secondary “off” float which will operate if the Timer On & Off float fails. Pumping will be disabled in both the automatic and manual modes.

This float should also activate the alarm light and audible alarm. Consult with NPS design engineer for final float elevation.

3. Installation must be completed in accordance with all applicable federal, state and local code.

B. Install the quick disconnect fuse box within three feet of control panel. External disconnect shall be located between the supply load-center (distribution panel) and the pump control panel within hands-reach of the panel.

C. Update panelboard labels to reflect electrical modifications.

D. All wiring must be completed by a qualified licensed electrician.

3.5 FINAL INSPECTION

A. Prior to final inspection, Contractor shall thoroughly flush the system to remove any dirt or plastic shavings from the transport and lateral lines, and to verify that the pump and controls are operational. The installer shall adjust and verify that dosing and timed controls are in conformance with these specifications and drawings.

B. Contractor shall identify and provide red-line drawings indicating any changes to the design engineer. Design engineer shall be responsible for preparing construction record information:

1. As-built record drawings.

2. Measured drawdown (in inches) per dose cycle.

3. Timer functions (On & Off).

4. Residual pressure and/or squirt height at the end of each lateral, as inspected.

5. Initial system conditions.

6. Operations & Maintenance (O&M) user’s manual.