BID 2022-106 Addendum 1.pdf

INVITATION TO BID #2022-106

FISCHER’S FOREST PARK:

LARGE ONSITE SEWAGE SYSTEM TREATMENT PROCESS UPGRADE

ADDENDUM NUMBER 1

January 19, 2023

On December 28, 2022, Clackamas County (“County”) published Invitation to Bid #2022-106 (“BID”). The County has found that it is in its interest to amend the BID through the issuance of this Addendum #1. Except as expressly amended below, all other terms and conditions of the original BID and subsequent Addenda shall remain unchanged.

A. CONTRACT DOCUMENTS

1. Bid Schedule

a. Item 7

1) Under item a), replace D-3034 with C900.

2) Add item “e) Abandon Existing 8-inch Sewer Pipe”. This item is missing in the original bid tab.

3) Add item “f) Abandon Existing Manhole”. This item is missing in the original bid tab.

B. PROJECT SPECIFICATIONS

1. Section 00010 – Table of Contents

a. General Specification and Sewer Work

1) Add “Section 02221 Trenching, Backfilling, and Compaction”.

This section is being added as part of Addendum #1.

2. Section 01010 – Summary of Work

a. Add Section 01010 in its entirety. This section is missing from the initial

BID package.

3. Section 01025 – Measurement and Payment

a. Replace all references to 8-inch D-3034 PVC with 8-inch C900 PVC

b. Add to section 1.02.H: “e) Abandon Existing Pipe: Measurement and payment for abandoning pipe, regardless of size shall be on a linear foot basis. This shall include all materials, equipment and labor to install the CSLM inside the pipe as specified.”

c. Add to section 1.02.H: “f) Abandon Existing Manhole: Measurement and payment for abandoning manholes for all depths shall be on a unit price basis and include all materials equipment and labor to per-form the work as specified.”

4. Section 02221 – Trenching, Backfilling, and Compaction

a. Add Section 02221 in its entirety. This section is missing from the initial

BID package.

5. Section 02530 Sanitary Sewer Pipe and Manholes

a. Replace Section 02530 in its entirety. In the original BID, the contents of section 02530 are incomplete. Replace the entire section with Section 02530 issued as part of Addendum #1.

C. CONSTRUCTION DRAWINGS

1. Remove all construction drawings in the original package and replace them with those from Addendum #1. The original bid includes some duplicate drawings.

Additionally, Addendum #1 include changes to some drawings. To avoid confusion, all drawings from the original bid shall be replaced by those included as part of Addendum #1.

a. The pages being replaced include all Valley Science and Engineering drawings dated 8/18/2022 and Water Environment Services drawings dated October 2022.

b. The new construction drawings include Valley Science and Engineering drawings dated 1/04/2023 and Water Environment Services drawings dated December 2022.

2. Changes to the drawings include:

a. Sheet G1. Added a figure index for WES provided details.

b. Sheet G5. Includes additional information related to decommissioning and abandonment of the existing facility.

c. Sheet T2. Updated pipe material of 8-inch

d. Sheet T4. Removes he point repair to the west inlet pipe. This repair will be completed as part of a separate project.

e. Sheet D3. The updated sheet contains minor clarification not to glue pipe after adapter.

f. Sheet M2. Contains changes to the fence mesh and fence pipe specifications. Sheet now calls for PVC coated fence mesh and pipes as well as adds privacy slats to the fence.

g. Sheet S2. Removed callout 21 from top and section views. Generator to be installed as part of a separate project.

All Bidders shall acknowledge receipt and acceptance of this Addendum No. 1 in the Bid Form or by submitting the Addendum with the bid package. Bid Forms submitted without acknowledgment or without this Addendum will be considered in nonconformance.

Appended hereto and part of Addendum No. 1:

Bid Schedule PROJECT SPECIFICATIONS: Section 00010 PROJECT SPECIFICATIONS: Section 01010 PROJECT SPECIFICATIONS: Section 01025 PROJECT SPECIFICATIONS: Section 02221 PROJECT SPECIFICATIONS: Section 02530 APPENDIX C: Construction Drawings

End of Addendum #1

Bid Schedule - Addendum #1

ITEM DESCRIPTION UNIT QUANTITY UNIT PRICE SUB TOTAL ITEM TOTAL

1 Mobilization LS 1

2 Erosion Control LS 1

3 By-Pass Pumping LS 1

4 Decommission Existing East Septic Tank LS 1

5 Effluent Lift Station Retrofit LS 1

6 Decomission Existing Treatment System

a) Decomission Advantex Pods LS 1

b) Remove Existing Fence LS 1

c) Decomission Electrical Equipment and Controls LS 1

d) Decomission Other Structures and Equipment LS 1

Decomission Existing Treatment Item Total (sum 7a through 7d) LS 1

7 East Septic Tank Installation

a) 8-inch C900 PVC Gravity Sewer Pipe LF 20

b) 4-inch Schedule 40 PVC Pipe LF 20

c) 3,000-gallon Pre-Cast Concrete Septic Tank EA 2

d) Install New Manhole EA 1

e) Abandon Existing 8-inch Sewer Pipe LF 10

f) Abandon Existing Manhole EA 1

East Septic Tank Installation Item Total (Sum 8a through 8d) LS $1.00

January 18, 2023

Fischer's Forest Park Rehab Project

8 Recirculating Treatment and Subsurface Drip Distribution System

a) 3,000-gallon Pre-Cast Concrete Recirculation Tank EA 3

b) AdvanTex AX100 Textile Filter Units EA 3

c) 2-inch Schedule 40 PVC Pressure Effluent Sewer Pipe (Recirculation Tank C to Treatment units)

LF 90

d) 4-inch Schedule 40 PVC Pipe LF 90

e) Custom Primary Flow Splitter Basin LS 1

f) Ultra-Violet Units EA 3

g) Custom Secondary Flow Splitter Basin LS 1

h) 3,000-gallon Pre-Cast Dripfield Dosing Tank EA 1

i) Concrete pad for Controls Shelter LS 1

j) Orenco Durafiber Controls Shelter LS 1

k) Custom Telemetry Control and Alarm Panel LS 1

l) 1-inch Schedule 40 PVC Pressure Effluent Sewer Piping EA 30

m) 1.5-inch Schedule 40 PVC Pressure Effluent Sewer and Drip Field Manifold Pipe LF 1,420

n) 2-inch Schedule 40 PVC Pressure Drip Field Flush Main Piping LF 500

o) 52,000 sq. ft. of Netafim Subsurface Drip Distribution System LS 1

p) Hydraulic Unit and Disc Filter Headworks LS 1

Recirculating Treatment System Item Total (Sum 9a through 9p) LS $1.00

9 New Water Service

a) 1-inch Water Service Line and heat tape LF 100

b) 1-inch Reduced Pressure Backflow Preventor & Pressure Reducer and heat tape LS 1

c) Frost Free Hydrant LS 1

New Water Service Item Total (Sum 10a through 10c) LS $1.00

10 Miscellaneous Site Improvements

a) Chainlink Fence LF 360

b) Gravel Access Road Crushed Rock and Geofabric SF 2,500

Miscellaneous Site Improvements Item Total (Sum 11a through 11b) LS 1

TOTAL PROJECT CONSTRUCTION COST (WRITTEN):

TOTAL CONSTRUCTION COST (IN $)

January 2023 Section 00010 Fischer’s Forest Park Treatment System Rehab Table of Contents

WATER ENVIRONMENT SERVICES SPECIFICATIONS

SECTION 00010

TABLE OF CONTENTS

GENERAL SPECIFICATIONS AND SEWER WORK

Section Number Title

01010 Summary of Work

01025 Measurement and Payment

01040 Coordination and Project requirements

01060 Permits and Easements

01300 Submittals Procedure

01310 Construction Schedule

01560 Environmental Controls

02221 Trenching, Backfilling, and Compaction

02530 Sanitary Pipe and Manhole

LARGE ONSITE SEWAGE SYSTEM

Section Number Title

N/A Valley – Revised Plans and Specifications

Appendixes

A. Site Specific Safety Plan Certification

B. Manhole/Pipeline Testing Forms

C. Construction Drawings

October 2022 Section 00010 Fischer’s Forest Park Treatment System Rehab Summary of work

SECTION 01010

SUMMARY OF WORK

PART 1 GENERAL

1.01 SUMMARY

A. This contract consists of installation of approximately 4,400 lf of 8” Cured in Place Pipe (CIPP), as well as, lateral reconnection, lateral sealing, 3 point repairs, 5 manhole replace-ments, 1 new manhole installation, and manhole rehab with epoxy coating and injection grouting.

B. The accomplishment of all of the above work, if awarded, shall meet the scheduled se-quence, milestones, limitations and the final completion dates specified.

C. All Work is to be substantially completed within 120 days of Notice to Proceed and ready for final payment 30 days thereafter.

D. The estimated construction cost for Work scope is $700,000

1.02 PERMITS

Contractor shall obtain and pay for all construction permits and licenses. District will assist Contractor, when necessary, in obtaining such permits and licenses. Contractor shall pay all governmental charges and inspec-tion fees necessary; for the prosecution of the Work which are applicable at the time of opening of Bids.

1.03 SITE VISITS

There will be no mandatory pre-bid site visit, but Bidders and sub-bidders are required to become familiar with and satisfy themselves as to the general, local and site conditions that may affect the cost, performance and furnishing of the Work.

1.04 WORK OF THIS CONTRACT

A. The work generally consists of furnishing and installing the following:

1. Install approximately 52,000 square feet of Nerafim subsurface distribution system

2. Retrofitting an existing septic system lift station tank

3. Install approximately 20 feet of 8” gravity sewer pipe

4. Install approximately 130 feet of buried 4-inch sewer effluent pipe.

5. Install one (1) new manhole

6. Install six (6) 3,000-gallon precast tanks and appurtenances

7. Install two (2) custom flow split basins

8. Install three (3) AdvanTex AX100 filtration units

Fischer’s Forest Park Treatment System Rehab Summary of work

9. Install approximately 2050 feet of buried, small diameter (1-inch, 1.5-inch, or 2-inch), pressurized PVC pipe

10. Install an Orenco Durafiber shelter including a concrete pad; a dripfield Disc Filter and hydraulic unit; custom telemetry control and alarm panel; heater & lighting

11. Install a new water service and yard hydrant

12. Construct a new chain link fence

13. Construct a new crushed rock access path.

14. All other ancillary work necessary to complete the sanitary sewer and comply with all easement and permit conditions.

B. Contractor Duties

1. Provide and pay for labor, materials, tools, equipment, superintendence, temporary facilities and services necessary for proper execution and completion of Work.

2. All required permits, governmental fees and licenses.

3. Comply with ordinances and regulation of public authorities having jurisdiction, including, but not limited to following:

a. Clackamas County

b. State of Oregon Department of Environmental Quality

1.0 EXISTING UTILITIES

A. In general, the locations of existing major utilities, whether aboveground or underground, are indicated on the Drawings. This information has been obtained from utility maps and field surveys. Owner does not guarantee the accuracy or completeness of this information, and it is to be understood that other aboveground or underground facilities not shown on the Drawings may be encountered during the course of the work. In any case, most minor lines such as individual services for water, gas and sprinkler irrigation lines are not indi-cated.

B. Existing utilities, whether shown on the Drawings or not, shall be maintained, relocated, rerouted, removed and restored as may be necessary by the Contractor in a manner satis-factory to owners and operators of the utilities and to Owner in accordance with the provi-sions and to the satisfaction of the affected utility or local agency.

1.06 SPECIFICATION LANGUAGE

Portions of the Specifications are written in imperative and streamlined form. This imperative language is directed to the Contractor, unless specifically noted otherwise. The words “shall be” shall be included by inference where a colon (:) is used within sentences or phrases. Example:

Aggregate: ASTM C33.

Fischer’s Forest Park Treatment System Rehab Summary of work

Where the Bidding Documents define methods, materials, or equipment by specifying a trade name, manufacturer and model or catalog number, the intent is not to limit competition but to establish a standard of quality, features, workmanship, reliability, serviceability, compatibility, performance, etc. Unless the specification description expressly states that no substitutions or “equals” will be allowed, the words “or equal” shall be deemed inserted in each such instance.

END OF SECTION

January 2023 Section 01025 Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment

SECTION 01025

MEASUREMENT AND PAYMENT

1.01 DESCRIPTION

A. Measurement is described under each proposal item in Paragraph 01025-1.02.

B. Payment for the various items on the Proposal, as further specified herein, shall be based on measurements of completed work in accordance with United States Standard Measures and shall include all compensation to be received by the Contractor for furnishing all tools, equipment, supplies, and manufactured articles, and for all labor, operations, and inciden-tals appurtenant to the items of work being described, as necessary to complete the various items of the work all in accordance with the requirements of the Contract Documents, in-cluding all appurtenances thereto and including all costs of compliance with the regulations of public agencies having jurisdiction, including safety and health requirements of the Oc-cupational Safety and Health Act of the U.S. Department of Labor (OSHA) and Oregon State Department of Labor and Industries, also for loss or damage arising from the nature of the work, or from the action of the elements, or from any unforeseen difficulties which may be encountered during the prosecution of the Work until the final acceptance by the Owner. No separate payment will be made for any item that is not specifically set forth in the Proposal Schedule, and all costs therefor shall be included in the prices named in the Proposal Schedule for the various appurtenant items of work.

C. Quantities listed in the Proposal do not govern final payment. Payments to the Contractor will be made only for actual quantities of Contract items performed in accordance with terms of the Contract and for items of work actually performed under Change Orders.

D. Indirect costs, such as supervision and overheads, profit, the general conditions specified in the Contract, all shall be allocated to each proposal item as applicable for work defined in the proposal item. No separate payment will be made to the Contractor for these items.

1.02 PROPOSAL ITEM MEASUREMENT AND PAYMENT

A. Item 1 - Mobilization: Payment for Mobilization will be made on a lump sum basis. The amount to be allowed for Mobilization in the partial payment to be made under the Contract will be as follows:

a. When 5% of the total original contract amount is earned from other proposal items, not including advances on materials, 50% of the amount bid for Mobilization, or 2.5% of the original contract amount, whichever is the least, less normal retainage, will be paid.

b. When 10% of the total original contract amount is earned from other proposal items, not including advances on materials, 100% of the amount bid for mobilization, or 5% of the original contract amount, whichever is the least, less normal retainage, will be paid.

c. Upon completion of all work on the project, payment of any amount bid for

Mobilization in excess of 5% of the total original contract amount will be paid.

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment

d. The above schedule of progress payments for Mobilization shall not limit or preclude progress payments otherwise provided by the Contract.

e. Mobilization paid under paragraph 1-4 shall not exceed 5% of the total original contract amount for bid items 1 through 10. Amounts greater than 5% shall be reimbursed with the Final Pay Request at the end of construction.

B. Item 2 - Erosion Control: All erosion control measures including materials, equip-ment and labor unless identified as part of other individual bid items shall be meas-ured and paid on a lump sum basis as shown in the Proposal.

C. Item 3 - By-pass Pumping: Measurement and payment for sanitary sewer bypass pumping shall be made on a lump sum basis. The lump sum price shall include all costs for materi-als, equipment and labor to provide the appropriately sized flow diversion and piping dur-ing all elements of construction.

D. Item 4 - Decommissioning of existing east septic tank: Measurement and payment for de-commissioning the east septic tank shall be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to abandon the east septic tank and related pipe. This will include, but is not limited to, pumping and disposing sewage, filling tank with approved material, and filling abandoned 8” pipe with CLSM.

E. Item 5 - Effluent Lift Station Retrofit: Measurement and payment for retrofitting the exist-ing lift station recirculation tank shall be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to convert the existing tank into an effluent lift station. This will include, but is not limited to, decommissioning and proper disposal of old pipes, pumps, floats and appurtenances; core drilling holes; duplex pumps, float assembly, custom flow inducer tower, pressure filters and related piping; and repair-ing pipe leak from western influent pipe.

F. Item 6 - Decommission Existing Treatment System: Item 6a-6d should be inclusive of all costs associated with decommissioning the existing treatment system as shown on Drawing Sheet G3 and G5.

a. Decommission Advantex Pods: Measurement and payment for decommissioning the Advantex AX100 Pods will be billed on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to remove and properly dispose of the filtration units. This includes, but is not limited to, removing Ad-vantex pod, properly disposing of pods, and backfilling voids.

b. Remove Existing Fence: Measurement and payment for decommissioning the chain link fences will be billed on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to remove and dispose of the fences. This will include but is not limited to, removal of chain link fencing, fence posts and footings, crossbars, and gate posts, and backfill any voids for the fence around the existing treatment area and recirculation tank area.

c. Decommission Electrical Equipment and Controls: Measurement and payment for removing control panels and electrical equipment will be billed on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to remove and dispose of all electrical equipment. This includes, but is not limited

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment to, removal and disposal of the controls cabinet near the existing recirculation tank;

removal and disposal of the electrical cabinet at the treatment area; removing all old wiring; cutting and capping of all abandoned conduit.

d. Decommission other structures and equipment: Measurement and payment for re-moving all other equipment and structures related to treatment at the site of the AX100 pods will be billed on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to remove and dispose of all equipment and structures. This includes, but is not limited to, removal and disposal of pumps, floats, and wiring; removal of pump sequencing unit; pumping and disposal of sewage; cutting, capping and abandoning all piping; and filling all basins and voids.

G. Multiple Sections - Gravity Sewer Pipe: Measurement for gravity sewer pipe, will be computed for pipe size and material based on the following limits for length of trench:

a. Length: Length of all sewer pipe will be measured horizontally along center of pipe from center-to-center through fittings, to manholes, or to the end of pipe, whichever is applicable.

b. 8-inch C900 and 4-inch Schedule 40 PVC Gravity Sewer Pipe: Payment per linear foot of pipe and trench excavation shall be full compensation for all materials, equipment and labor to construct the sewer pipe in place; the pipe bedding required by the Plans and Specifications; all material used to complete the backfill of the pipe zone in accordance with the Specifications; and all work necessary to furnish, place, and compact the bedding, pipe zone backfill materials, and crushed rock for imported backfill to pavement base or to the ground surface as required. The price proposal shall also include: construction staking to establish lines and grades;

dewatering, sheeting, shoring and bracing; backfilling trench with native or imported materials; disposal of excess excavation; the excavation necessary to widen the trench for installation of manholes, tanks, and appurtenances; the supporting and protection of existing utility crossings; the preparation of subgrade;

and all other work necessary to install the pipe in place including testing and plugs.

No payment will be made for any section of pipe not yet passing all trench backfill, air and mandrel testing requirements

H. Item 7 - East Septic Tank Installation: Item 7a-7d should be inclusive of all costs associ-ated with constructing a new septic tank system and manhole.

a. 8-inch C900 PVC Pipe: See Paragraph 1.02.G

b. 4-inch Schedule 40 PVC Pipe: See Paragraph 1.02.G

c. 3,000-gallon Pre-Cast Concrete Septic Tank: Measurement and payment for pre-cast septic tanks will be made on a unit price basis as shown in the Proposal for all depths. The per each price shall include all costs for materials, equipment and labor to install new septic tanks and appurtenances. Payment per each tank shall include, but is not limited to, common excavation; base material; imported backfill;

dewatering; fiberglass riser and cover; constructing and testing the tank complete in place. Payment for external piping will be paid under separate bid items.

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment

d. Manholes: Measurement and payment for sanitary sewer manholes 48” diameter will be made on a unit price basis as shown in the Proposal for all depths. Payment per each 48” manhole (standard or flat-top) shall include full compensation for:

materials, equipment and labor including common excavation; base rock; imported backfill; dewatering; manhole frame and cover; manhole grade rings; testing and constructing the manhole complete in place. No separate payment will be made for flat-top manholes

e. Abandon Existing Pipe: Measurement and payment for abandoning pipe, regardless of size shall be on a linear foot basis. This shall include all materials, equipment and labor to install the CSLM inside the pipe as specified.

f. Abandon Existing Manhole: Measurement and payment for abandoning manholes for all depths shall be on a unit price basis and include all materials equipment and labor to per-form the work as specified

I. Multiple Sections - Pressure Pipe: Measurement for pressure sewer effluent pipe, will be computed for pipe size and material based on the following limits for length of trench:

a. Length: Length of all pressure sewer pipe will be measured horizontally along center of pipe from center-to-center through fittings, to tank, structure, or to the end of pipe, whichever is applicable.

b. 1-inch, 1.5-inch, and 2-inch Schedule 40 PVC Pressure Pipe: Payment per linear foot of pressure pipe and trench excavation shall be full compensation for all materials, equipment and labor to construct the pressure pipe in place, which includes but is not limited to, the pipe bedding required by the Plans and Specifications; all material used to complete the backfill of the pipe zone in accordance with the Specifications; and all work necessary to furnish, place, and compact the bedding, pipe zone backfill materials, and crushed rock for imported backfill to pavement base or to the ground surface as required. The price proposal shall also include: construction staking to establish lines and grades; dewatering, sawcutting, sheeting, shoring and bracing; backfilling trench with native or imported materials; disposal of excess excavation; the excavation necessary to widen the trench for installation of manholes, tanks, and appurtenances; the supporting and protection of existing utility crossings; the plugging or removing of abandoned conduit and structures; the preparation of subgrade; and all other work necessary to install the pipe in place including testing and plugs. No payment will be made for any section of pipe not yet passing all trench backfill, and testing requirements

J. Item 8 - Recirculating Treatment and Subsurface Drip Distribution System: Items 8a-8o should be inclusive of all costs associated with constructing a new recirculating treatment system and subsurface drip distribution system as outlined in the Drawings and Specifica-tions.

a. 3,000-gallon Pre-Cast Concrete Recirculation Tanks: Measurement and payment for recirculation tanks will be made on a unit price basis as shown in the Proposal for all depths. The per each price shall include all costs for materials, equipment

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment and labor to install new septic tanks and appurtenances. Payment per each tank shall include, but is not limited to, common excavation; base material; imported backfill; dewatering; internal piping; construction and installation of custom flow inducer towers; external splice boxes and related wiring; fiberglass riser and cover;

constructing and testing the tank complete in place. Payment for external piping will be paid under separate bid items.

b. AdvanTex AX100 Textile Filter Units: Measurement and payment for AX100 units will be made on a unit price basis as shown in the Proposal for all depths. The per each price shall include all costs for materials, equipment and labor to install new AX100 units and appurtenances. Payment per each unit shall include, but is not limited to, common excavation; base material; backfill; dewatering; vented fan assembly, wiring, and related appurtenances; and fittings. Payment for external piping will be paid under separate bid items.

c. 2-inch Schedule 40 PVC Pressure Effluent Sewer Pipe: See Paragraph 1.02.I

d. 4-inch Schedule 40 PVC Pipe: See Paragraph 1.02.G

e. Custom Primary Flow Splitter Basin: Measurement and payment for flow splitter basin will be made on a lump sum basis for all depths. The lump sum price shall include all costs for materials, equipment and labor to install a new basin and ap-purtenances. Payment shall include, but is not limited to, common excavation; base material; imported backfill; dewatering; internal piping; basin and cover;

constructing and testing the tank complete in place. Payment for external piping will be paid under separate bid items.

f. Orenco Ultra-Violet Units: Measurement and payment for UV units will be made on a unit price basis as shown in the Proposal for all depths. The per each price shall include the cost of each unit and all proprietary equipment. Payment per each unit shall include the cost of items purchased directly from Orenco. Payment for installation and ancillary equipment and appurtenances will be paid for under the precast dripfield dosing tank item.

g. Custom Secondary Flow Splitter Basin: Measurement and payment for ultraviolet light system will be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to install a new custom secondary flow splitter basin and appurtenances. Payment shall include, but is not limited to, common excavation; base material; imported backfill; dewatering; basin and cover;. Payment for external piping will be paid under separate bid

h. 3,000-gallon Pre-Cast Dripfield Dosing Tank: Measurement and payment for pre-cast dosing tank will be made on a lump sum basis as shown in the Proposal for all depths. The per each price shall include all costs for materials, equipment and labor to install new tanks and appurtenances. Payment per each tank shall include, but is not limited to, common excavation; base material; imported backfill; dewatering;

internal piping; construction and installation of custom flow inducer towers; exter-nal splice boxes and related wiring; fiberglass riser and cover; installation of the UV units; wiring and piping integral to the systems construction; and testing the tank complete in place. Payment for external piping will be paid under separate bid items.

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment

i. Concrete pad for Treatment System Controls Shelter: Measurement and payment for constructing the concrete slab will be billed on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to construct the concrete slab. Payment shall include, but is not limited to, common excavation;

base material; framing; testing and other incidental work required to complete con-struction.

j. Orenco Durafiber Treatement System Controls Shelter: Measurement and payment for the controls shelter will be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to install the shelter and related equipment not listed elsewhere. Payment shall include, but is not limited to, installation of the shelter; wiring and installation of heater, load center, lights and other equipment; and loft section.

k. Custom Telemetry Control and Alarm Panel: Measurement and payment for the control panel shall be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to install, test, and integrate the control panel into a working system.

l. 1-inch Schedule 40 PVC Pressure Effluent Sewer Pipe: See Paragraph 1.02.I

m. 1.5-inch Schedule 40 PVC Pressure Effluent Sewer and Drop Field Manifold Pipe:

See Paragraph 1.02.I

n. 2-inch Schedule 40 PVC Pressure Drip Field Flush Main Pipe: See Paragraph 1.02.I

o. 52,000 sq. ft. of Netafim Subsurface Drip Distribution System: Measurement and payment for installation of drip distribution system will be made on a unit price basis as shown in the Proposal. Payment per square foot of distribution system and trench excavation shall be full compensation for all materials, equipment and labor to construct the system in place, which includes but is not limited to, disc filters;

dripper tubing; all flex tee connectors and valves; flow meter; sampling tap; wire splices; and hydraulic unit. The price proposal shall also include: construction staking to establish lines and grades; disposal of excess excavation; the excavation necessary to widen the trench for installation valves and appurtenances; and all other work necessary to install the system including testing. No payment will be made for any section of the system not yet passing testing requirements. Payment for non-dripper line pressure piping will be paid under separate bid item.

p. Hydraulic Unit and Disc Filter Headworks: Measurement and payment for AX100 units will be made on a lump sum basis. The shall include all costs for materials, equipment and labor to install new drip hydraulic unit and, and appurtenances.

Payment per each unit shall include, but is not limited to, mounting skid or enclo-sure; drip hydraulic unit; automatic-flush disc filter headworks; flow meter; sam-pling port; wiring, piping, and related appurtenances; Payment for external piping will be paid under separate bid items

K. Item 9 – New Water Service: Items 9a-9c should be inclusive of all costs associated with constructing a new water service line as outlined in the Drawings and Specifications.

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment

a. 1-inch Water Service Line and Heat Tape: Measurement for water service line will be computed for pipe size and material based on the following limits for length of installation:

1. Length: Length of all pressure sewer pipe will be measured horizontally along center of pipe from center-to-center through fittings, from water me-ter to hydrant or other termination points.

2. Payment per linear foot of water line and trench excavation shall be full compensation for all materials, equipment and labor to construct the pres-sure pipe in place, which includes but is not limited to, the pipe bedding;

heat tape and associated wiring; all material used to complete the backfill of the pipe zone; and all work necessary to furnish, place, and compact the bedding, pipe zone backfill materials, and crushed rock for imported backfill to pavement base or to the ground surface as required. The price proposal shall also include: backfilling trench with native or imported materials; disposal of excess excavation; the excavation necessary to widen the trench for installation of appurtenances; the supporting and protection of existing utility crossings; the preparation of subgrade; and all other work necessary to install the pipe in place including testing. No payment will be made for any section of pipe not yet passing all trench testing requirements

b. 1-inch Reduced Pressure Backflow Preventer & Pressure Reducer: Measurement and payment for installation reduced pressure backflow preventer and pressure re-ducer will be made on a lump sum basis. The lump sum price shall include all costs for materials, equipment and labor to install a reduced pressure backflow preventer and pressure reducing device. This includes, but is not limited to, common excavation; valve box; site restoration; heat tape; constructing and testing in place.

Payment for water line will be paid under a separate bid item.

c. Frost Free Hydrant: Measurement and payment for hydrant will be made on a lump sum basis for all depths. The lump sum price shall include all costs for materials, equipment and labor to install the hydrant. Payment shall include but is not limited to full compensation for: materials; equipment and labor including common excavation; base rock or imported backfill; and disposal of excess excavation.

L. Item 10 – Miscellaneous Site Improvements: Items 10a-10b should be inclusive of all costs associated with constructing the items listed as outlined in the Drawings and Specifications.

a. Chain-link Fence: Measurement and payment for installation of fencing system will be made on a unit price basis as shown in the Proposal. Payment per linear foot of fence shall be full compensation for all materials, equipment and labor to construct the fence. This includes, but is not limited to, common excavation; dis-posal of excess excavation; concrete bases; chain link fence, wire, metal post, and braces for gates and fence sections; and privacy slats.

b. Gravel Access Road: Measurement and payment for installation of crushed rock surface shall be made on a unit price basis as shown in the Proposal. Payment per square foot of finished area shall be full compensation for all materials, equipment and labor to construct the surface. This includes, but is not limited to, clearing and

Fischer’s Forest Park Treatment System Renovation Project Measurement and Payment grubbing; common excavation; disposal of excess excavation; subsurface prepara-tion; installation of geofabric; and placement and compaction of crushed rock sur-face.

FISCHER’S FOREST PARK

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TRENCHING, BACKFILLING AND COMPACTING

SECTION 02221

TRENCHING, BACKFILLING, AND COMPACTING

1.01 SUMMARY

This Section specifies requirements for trenching, backfilling, and compacting of trenches for 48-inch manhole, 8-inch sanitary sewer pipe along with abandonment of existing 8-inch sanitary sewer pipe and 48-inch manhole.

1.02 RELATED SECTIONS

A list of sections of the project specifications that are most closely related to this section is pro-vided for the convenience of the Contractor.

A. Section 02530, Sanitary Sewer Pipe and Manholes

1.03 REFERENCES

A. AASHTO T-99

B. Oregon Department of Transportation (ODOT), Standard Specifications for Highway

Construction

PART 2 PRODUCTS

2.01 BEDDING AND BACKFILL MATERIALS

A. Gravel for Trench Foundation Material: 2 ½ inch minus clean pit-run gravel, crushed rock or gravel, having reasonably even gradation from coarse to fine or open graded. Maximum percent passing the ¼ inch screen shall be 20% by weight.

B. Crushed Gravel Pipe Base and Pipe Zone: 3/4 inch minus crushed gravel, having reason-ably even gradation from coarse to fine, in accordance with the Oregon State Highway Commission Standard Specifications for Highway Construction specification for Aggregate and Aggregate Base, Section 02630.10.

C. Select Material for Trench Backfill and Aggregate Base: 3/4-inch minus crushed gravel or rock, reasonably even graded from coarse to fine, in accordance with the Oregon State Highway Commission Standard Specification for Highway Construction for Aggregate and Aggregate base, Section 02630.10.

D. Portland Cement Concrete: PCC shall be composed of cement, pozzolans, fine aggregate, water and admixtures with a 28-day compressive strength of 3,300 psi.

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E. Controlled Low Strength Material (CLSM): CLSM shall be composed of cement, pozzolans, fine aggregate, water and admixtures. CLSM shall have a low cement content, be non-segregating, self-consolidating, free-flowing and excavatable material which will result in a hardened, dense, non-settling fill and a compressive strength at 28 days of 100 to 200 psi.

PART 3 EXECUTION

3.01 TRENCHING

A. Clearing the Right-of-Way or Private Property:

1. Existing trees or tree limbs whether on public or private property, are not to be removed without permission from the Engineer or as designated on the plans.

2. The Contractor shall exercise all due care in protecting property along the route of the improvement. This protection shall include, but not be limited to, trees, yard, fences, drainage lines, mail boxes, driveways, shrubs and lawns. If any of the above have been disturbed without Engineer approval, they shall be restored to as near their original condition as possible.

B. Obstructions: This item refers to obstructions which may be removed and do not require replacement. Obstructions to the construction of the trench such as but not limited to stumps, abandoned waterlines, manholes, logs, rubbish, and debris of all types, shall be removed by the Contractor at his own expense without additional compensation from the Owner.

C. Trench Width: Trench width at the ground surface shall kept to a minimum necessary to install the pipe in a safe manner. In all cases, trenches must be of sufficient width to allow for shoring and permit proper joining of pipe and compaction of the backfill material along sides of the pipe. Minimum trench width, in the pipe zone, must provide a clear working space 6 inches on each side of the barrel for sewer pipe. If there is a maximum width shown and said width is exceeded by Contractor without written authorization, Contractor will be required, at no expense to Owner, to provide pipe of a higher strength designation, a higher class of bedding, or both, as approved. In all cases, confine trench operations to dedicated right-of-way for public thoroughfares or within areas for which construction easements have been obtained, unless special arrangements have been made with the affected property owners.

D. Grade: The bottom of the trench shall be carried to the lines and grades shown on the plans or as established by the Engineer, with proper allowance for pipe thickness and gravel bedding. Correct any part of the trench excavated below grade with material of the type specified in paragraph 2.01 for the full width of the trench; thoroughly compacted in layers not to exceed 6 inches to the established grade.

E. Shoring, Sheeting, and Grading of Trenches: Whenever necessary to prevent caving during excavation in gravel, sandy soil, or other unstable material, adequately sheet and brace the trench. Where sheeting and bracing are used, increase trench widths accordingly. Ensure trench sheeting remains in place until the pipe has been placed and backfill of the pipe zone is completed. All sheeting, shoring and bracing of trenches shall conform to the requirements of Section 02160.

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F. Location of Excavated Materials: During trench excavation, locate the excavated material so it will not completely obstruct the drainage path and, unless otherwise approved by the Engineer. Locate all excavated materials to minimize erosion and sediment.

G. Removal of Water: Provide and maintain ample means and devices with which to promptly remove and dispose of all water when trench is being prepared for pipe laying, during laying of pipe, and until backfill has been completed. Dispose of water in accordance with state and local regulations.

H. Foundation Material: When, in the opinion of the Engineer, the material in the bottom of the trench is unsuitable for supporting the pipe, excavate below the flow line as directed by the Engineer, place 12-ounce non-woven geotextile fabric at bottom and backfill to the required grade with gravel of the type specified in paragraph 2.01.

I. Trench Backfill at Pipe Zone for PVC Pipe: For all classes of backfill, the pipe zone is defined as extending from the bottom of bedding in the trench (6 inches below invert) to a point 12 inches above the outside of the pipe, and for the full width of the trench. Backfill the entire pipe zone with 3/4 inch minus crushed gravel placed and hand-leveled in 6 inch layers. Special effort to properly bed pipe by slicing backfill in pipe haunches up to springline shall be provided.

J. Bypass Pumping: Provide bypass pumping of all sanitary sewer necessary for installation of new pipe including both main line and services. Refer to Section 02530.

3.02 BACKFILLING AND COMPACTION

A. Trench Backfill Above Pipe Zone: Use the following types of backfill on the project in the areas shown on the plans.

1. Class A Backfill: Backfill the entire trench above the pipe zone with native excavated material and compact in accordance with the specifications. Contractor shall stockpile top 12-inches of material excavated from trench separate from remaining material and place on top of the finished trench.

3.03 EXCESS EXCAVATED MATERIAL

Haul and dispose of all excess excavated material. The Contractor shall make arrangements for the disposal of the excavated material and shall bear all costs and retain any profit incidental to such disposal. The Contractor shall comply with all provisions of any agency having jurisdiction.

3.04 GENERAL COMPACTION REQUIREMENTS

A. Backfill shall be maintained at proper moisture content so that the material is within 5% of optimum moisture.

B. Native backfill used for Class A shall be compacted to at least 90% of maximum density above the pipe zone and to within three feet of the ground surface. The top three feet shall be compacted to 92% of maximum density.

3.05 MECHANICAL COMPACTION REQUIREMENT

A. The method of compaction shall be at the Contractor's option, unless otherwise noted.

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B. Unless otherwise noted, the Contractor shall be responsible to provide the proper size and type of compaction equipment and select the proper method of utilizing said equipment to attain the required compaction density without damage to pipe, adjacent utilities and properties.

3.06 ABANDONMENT OF EXISTING PIPE AND MANHOLES

A. Drain abandoned pipes and fill entire length with CLSM. Properly dispose of any sewage within pipes being filled. Spillage of liquid shall be prohibited.

B. Remove the manhole in its entirety. Backfill with sand, bar run gravel, or other material approved by the Engineer, and place topsoil in the upper 12-inches to existing ground surface.

December 2022 Section 02530 Fischer’s Forest Park Treatment System Rehab Sanitary Sewer Pipe and Manholes

SECTION 02530

SANITARY SEWER PIPE AND MANHOLES

1.01 DESCRIPTION

The work covered by this section consists of furnishing and installing eight-inch (8”) sanitary sewer pipe, and appurtenances. In order to accomplish the work, temporary bypass pumping of sanitary sewer may be necessary. Four-inch (4”) and smaller pipes are covered in Valley Science and Engineering specifications section 5.3.

1.02 REFERENCES

A. ASTM A48, Gray Iron Castings.

B. ASTM A304, Steel Bars, Alloy, Subject to End-Quench Hardenability Requirements.

C. ASTM A615, Deformed and Plain Billet-Steel Bars for Concrete Reinforcement.

D. ASTM C478, Precast Reinforced Concrete Manhole Sections.

E. ASTM C924, Practice for Testing Pipe Sewer Lines by Low-Pressure Air Test Method.

F. ASTM C1244, Test Method for Concrete Sewer Manholes by the Negative Air Pressure (Vacuum) Test.

G. ASTM D2241, Poly(Vinyl Chloride)(PVC) Pressure-Rated Pipe (SDR Series).

H. ASTM D2837, Long Term Strength (L.T.H.S.) @ 74.4 degree F, 1600 PSI.

I. ASTM D3212, Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals.

1.03 SUBMITTALS

A. Provide sufficient data for the Engineer to properly evaluate the proposed pipe, manholes and appurtenances.

B. Product data submittals shall include, at a minimum, test reports. Provide test reports upon request, certifying that the pipe has been tested in accordance with and exceeds minimum requirements.

C. Precast manhole submittals shall include shop drawings from supplier

D. Bypass pumping procedures

Fischer’s Forest Park Treatment System Rehab Sanitary Sewer Pipe and Manholes

PART 2 PRODUCTS

2.01 MATERIALS

A. Polyvinylchloride (PVC) Gravity Sanitary Sewer (8-inch diameter): Of the size and type indicated on the plans, conforming to appropriate specifications detailed below.

1. PVC Sanitary Sewer/Storm Pipe: Conform to AWWA C 900, Class 150.

2. Pipe fittings shall be PVC shall meet requirements for DR18 and AWWA C-900.

Fittings shall be a one-piece injection molded or fabricated from a PVC compound meeting ASTM D1784. Joints shall conform to ASTM D3139 with gaskets confirming to ASTM F47

3. Joint Type: Elastomeric gasket, conforming to the requirements of ASTM D3212.

4. Rubber Gaskets: Conform to ASTM D1869.

B. Manholes and Appurtenances:

1. Concrete: Concrete used in the construction of the manhole base and other structures specified shall be so proportioned and mixed as to meet a minimum 3,000 psi compression test after 28 days. There shall be a minimum of five sacks of cement per cubic yard of concrete.

2. Precast Manhole Sections:

a. Minimum 48 inches in diameter, reinforced concrete pipe, Class 2, conforming to ASTM C478, with added requirement that the reinforcement be circular and not elliptical. Cones shall be eccentric with wall thickness and reinforcement similar to that of manhole pipe sections.

The tops and bottoms of the cones shall be parallel.

b. Flat-top manhole sections shall be used in lieu of eccentric cones where the depth from finish grade to invert is 5’-0” or less

c. Preformed gaskets may be used in lieu of mortar type joints and shall be RAM-NEK, manufactured by K.T. Snyder Company, Inc., Houston, Texas; Kent-Seal by Hamilton Kent, Kent, Ohio; or as approved.

d. 48” manholes will be installed full diameter, capped with a flat top lid

3. Precast Concrete Bases:

a. Precast base sections or manhole bases shall be approved by the Owner prior to installation. All precast bases shall conform to ASTM C478.

b. Construct bases per standard details and as noted on the plans.

c. Provide flexible connectors that are designed to produce a positive watertight connection for pipes entering a precast manhole. The connector

Fischer’s Forest Park Treatment System Rehab Sanitary Sewer Pipe and Manholes shall be manufactured by A-lok or an owner approved equal and shall meet the requirements of ASTM C-923..

4. Nonshrink Grout. Sika 212, Euco N-S, Five Star, or USA approved equal nonmetallic cementitious commercial grout exhibiting zero shrinkage. Grout shall not be amended with cement or sand and shall not be reconditioned with water after initial mixing. Nonshrink grout shall be placed or packed only with the use of an approved commercial concrete bonding agent. Unused grout shall be discarded after 20 minutes and shall not be used.

5. Mortar. Mortar shall conform to the requirements of AST C387. Or be proportioned one part Portland cement to two parts clean, well-graded sand, which will pass a 1/8-inch screen. Admixtures may be used not exceeding the following percentages by weight of cement: hydrated lime, 10 percent; diatomaceous earth or other inert materials, five percent. Mortar mixed for longer than 30 minutes shall not be used.

6. Manhole Extensions and Rings. Install rings and covers on top of manholes to positively prevent all infiltration of surface or groundwater into manholes. Rings shall be set in a bed of nonshrink grout with the nonshrink grout carried over the flange or the ring and shall be set so that tops of covers are flush with the surface of adjoining pavement, or 6-inches above natural ground, unless otherwise directed by the Owner. Extensions shall be limited to a maximum height of 27 inches from the center point of the first step to the top of the casting..

6. Manhole Frames and Covers: Of size and shape detailed on the plans or approved equal; ensure castings are tough, close-grained, gray iron, free from blowholes, shrinkage, and cold shuts, and they conform to ASTM A48, Class 30; ensure they are sound, smooth, clean, and free from blisters and defects. Plane and grind all castings where necessary to ensure perfectly flat and true surfaces. Covers shall be true and shall seat within the ring at all points. Manhole covers shall have two holes. Watertight/locking covers shall be solid with no holes.

7. Manhole Steps:

a. Steel reinforced polypropylene plastic, Lane International Corp. No. P-

13850, or approved equal, in conformance with ASTM C478; aligned vertically. Ensure steps within a manhole are of the same design, type, and size. Mixing of unmatched steps within the same manhole is not permitted.

b. Prior to delivery to the jobsite, manufacturer is to drive steps into preformed holes in precast concrete manhole cones and sections in conformance with the following: ASTM A615 Grade 60, 1/2" deformed steel rod and ASTM 2146-78 Type II, Polypropylene.

c. Place steps where there are no incoming or outgoing lines. Loose steps shall be cause for rejection of that manhole cone or section.

Fischer’s…