PWS_Attachments_and_Technical_Exhibits.pdf

TECHNICAL EXHIBIT 1

Performance Requirements Summary The contractor service requirements are summarized into performance objectives that relate directly to mission essential items. The performance threshold briefly describes the minimum acceptable levels of service required for each requirement. These thresholds are critical to mission success.

Base Contract Performance Objective

(The Service required—usually a shall statement)

Standard Performance Threshold (This is the maximum error rate. It could possibly be “Zero deviation from standard”)

Method of Surveillance

PRS # 1.

The contractor shall work safely PWS paragraph 5.5.

EM 385-1-1 Safety and Health Manual

ANSI Z133.1

No one injured or killed by tree work

Zero deviation from standard

100% inspection by

COR

PRS # 2

The contractor shall remove identified trees.

PWS paragraph 5.2.1.a

EM 385-1-1 Safety and Health Manual

ANSI Z133.1

Zero deviation from standard

100% inspection by

COR

PRS # 3

The contractor shall remove all stumps from identified trees PWS paragraph 5.2.1.b

EM 385-1-1 Safety and Health Manual

ANSI Z133.1

Zero deviation from standard

100% inspection by

COR

PRS # 4

The contractor shall remove all roots from identified trees.

PWS paragraph 5.2.1.c

M 385-1-1 Safety and Health Manual

ANSI Z133.1

All surface roots within a 10-foot radius and 15 inch depth of any tree removed shall be eliminated

Zero deviation from standard

100% inspection by

COR

PRS # 5

The contractor shall refill voids and regrade areas of stump and root removal PWS paragraph 5.2.1.d

Voids will be refilled with specified back fill material for planting and regrade.

Technical specification( 7.10) Specified Back Fill Material

Zero deviation from standard

100% inspection by

COR

PRS # 6

The contractor shall repair and damage to property PWS paragraph 5.3

Site returned to original condition or better Zero deviation from standard

100% inspection by

COR

PRS # 7

The contractor shall remove and clean up all debris.

PWS paragraph 5.4.

Site returned to original condition or better Zero deviation from standard

100% inspection by

COR

Technical Exhibit 2.

TECHNICAL EXHIBIT 3

Map of Phase IIIa

TECHNICAL EXHIBIT 4

Map of Phase IIIb

TECHNICAL EXHIBIT 5

Tree /Site Information

All trees to be removed are marked with a yellow dot, about 5’ up from the ground, facing away from the water and towards the path.

Trees with readable metal tags are marked with an asterisk (*).

This table is based off of the Phase III map, which also includes the planting plan, starting from the left moving right.

Phase III a There is a metal edge to the path to the south.

Tree# Caging Plant material around/ on tree Other notes 49 Yes Ivy Sign to the west, erosion 48* Yes Blackberries Round Tag 48 47 Yes Lite ivy “Survey Mon” stake with orange flagging 46* Yes Lite Blackberries Round Tag 46 P Yes Smallish tree 45 Yes Ivy 44 Yes Lots of Ivy Rope swing high in tree

Phase III b

Tree# Caging Plant material around/ on tree Other notes 16* Yes Lite ivy Metal square tag 16, and metal strip tag16-SO. Bench to the west 15 Yes Lite ivy Metal strip tag P Yes Lite ivy, shrub AKA 14a. Bench to the east 14* Yes Ivy Square metal tag 14, bird house on north side of tree 13 Yes Ivy Start of the concrete wall and beaver den area.

12* Yes Lite ivy Brown and metal square tags 12 11* Yes Lite ivy Metal square tag 11 10 Removed Bad erosion area O N/A – new planting location Bad erosion area P Removed Bad erosion area O N/A – new planting location Bad erosion area 9* Yes Madrone to the east Metal square tag 8 8 Yes Ivy, 2 madrones to the east O N/A – new planting location 7 Removed O N/A – new planting location 6 Yes Lite ivy Brown square tag 6, and metal strip tag O N/A – new planting location 5 Yes

TECHNICAL EXHIBIT 6

Detail of Phase IIIa

TECHNICAL EXHIBIT 7.8

Erosion Repair Details

DRAINAGE AGGREGATE

TECHNICAL EXHIBIT 7.9

Earthwork Specifications

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS (AASHTO)

AASHTO T 180 (2017) Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop

AASHTO T 224 (2010) Standard Method of Test for Correction for Coarse Particles in the Soil Compaction Test

ASTM INTERNATIONAL (ASTM)

ASTM A139/A139M (2016) Standard Specification for Electric-Fusion (ARC)-Welded Steel Pipe (NPS 4 and over)

ASTM C136/C136M (2014) Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates

ASTM D1140 (2017) Standard Test Methods for Determining the Amount of Material Finer than 75-µm (No.

200) Sieve in Soils by Washing

ASTM D1557 (2012; E 2015) Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3) (2700 kN-m/m3)

ASTM D2487 (2011) Soils for Engineering Purposes (Unified Soil Classification System)

ASTM D4318 (2017) Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils

U.S. ARMY CORPS OF ENGINEERS (USACE)

EM 385-1-1 (2014) Safety and Health Requirements Manual

U.S. GENERAL SERVICES ADMINISTRATION (GSA)

1.2 DEFINITIONS

1.2.1 Satisfactory Materials

Satisfactory materials comprise any materials classified by ASTM D2487 as GW, GP, GM, GP-GM, GW-GM, GC, GP-GC, GM-GC, SW, SP, SM, SW-SM, SC, SW-SC, SP-SM, or SP-SC. Satisfactory materials for grading comprise stones less than 8 inches, except for fill material for pavements and railroads which comprise stones less than 3 inches in any dimension.

1.2.2 Unsatisfactory Materials

Materials which do not comply with the requirements for satisfactory materials are unsatisfactory. Unsatisfactory materials also include man-made fills; trash; refuse; backfills from previous construction; and material classified as satisfactory which contains root and other organic matter or frozen material. Notify the Contracting Officer when encountering any contaminated materials.

1.2.3 Cohesionless and Cohesive Materials

Cohesionless materials include materials classified in ASTM D2487 as GW, GP, SW, and SP. Cohesive materials include materials classified as GC, SC, ML, CL, MH, and CH. Materials classified as GM and SM will be identified as cohesionless only when the fines are nonplastic. Perform testing, required for classifying materials, in accordance with ASTM D4318, ASTM C136/C136M and ASTM D1140.

1.2.4 Degree of Compaction

Degree of compaction required, except as noted in the second sentence, is expressed as a percentage of the maximum dry density obtained by the test procedure presented in ASTM D1557 abbreviated as a percent of laboratory maximum dry density.

1.2.5 General Fill

SIEVE SIZE PERCENT PASSING

3 inches 100 No. 40 0-60

No. 200 0-15

1.2.6 Free Draining Fill

1 ½ inches 100

1 inch 95-100 ½ inch 25-60 No. 4 0-10

No. 200 0-5

1.2.7 Drainage Aggregate

2 inches 99-100

1 ½ inches 90-100 1 inch 20-55 ¾ inch 0-15

3/8 inch 0-5

1.2.8 Topsoil

All topsoil shall be comprised of 50 percent compost and 50 percent sand. Material suitable for topsoils is defined as:

Natural, friable soil representative of productive, well-drained soils in the area, free of subsoil, stumps, rocks larger than one inch diameter, brush, weeds, toxic substances, and other material detrimental to plant growth. Amend topsoil pH range to obtain a pH of 5.5 to 7.

1.2.9 Unstable Material

Unstable materials are too wet to properly support the utility pipe, conduit, or appurtenant structure.

PART 2 PRODUCTS

2.1 REQUIREMENTS FOR OFFSITE SOILS AND AGGREGATE

Test soils brought in for use as backfill for contaminants; all imported soils shall be free of any contaminants. Do not bring material onsite until tests have been approved by the Contracting Officer.

PART 3 EXECUTION

3.1 STRIPPING OF TOPSOIL AND DEBRIS

Where indicated or directed, strip and remove existing topsoil and debris. Keep topsoil separate from other imported materials, brush, litter, objectionable weeds, roots, stones larger than 2 inches in diameter, and other materials that would interfere with planting and maintenance operations. Remove from the site any surplus of topsoil from excavations and gradings.

3.2 GENERAL EXCAVATION

Perform any excavation of every type of material encountered within the limits of the project to the lines, grades, and elevations indicated and as specified. Perform the grading in accordance with the typical sections shown and the tolerances specified in paragraph FINISHING. Transport satisfactory materials and place in fill within the limits of the work. Excavate unsatisfactory materials encountered within the limits of the work below grade and replace with satisfactory materials as directed. Include such excavated material and the satisfactory material ordered as replacement in excavation. Dispose surplus not required for fill or embankment in areas approved for surplus material storage or designated waste areas. Dispose unsatisfactory excavated material in designated waste or spoil areas. During construction, perform excavation and fill in a manner and sequence that will provide proper drainage at all times.

3.2.1 Drainage

Provide for the collection and disposal of surface and subsurface water encountered during construction as needed. It is the responsibility of the Contractor to assess the soil and ground water conditions presented by the plans and specifications and to employ necessary measures to permit construction to proceed.

3.2.2 Underground Utilities

The Contractor is responsible for movement of construction machinery and equipment over pipes and utilities during construction. Report damage to utility lines or subsurface construction immediately to the Contracting Officer.

3.3 GROUND SURFACE PREPARATION

3.3.1 General Requirements

Remove and replace unsatisfactory material with satisfactory materials, as directed by the Contracting Officer, in surfaces to receive fill or in excavated areas. Scarify the surface to a depth of 6 inches before the fill is started. Plow, step, bench, or break up sloped surfaces steeper than 1 vertical to 4 horizontal so that the fill material will bond with the existing material.

When subgrades are less than the specified density, break up the ground surface to a minimum depth of 6 inches, pulverizing, and compacting to the specified density. When the subgrade is part fill and part excavation or natural ground, scarify the excavated or natural ground portion to a depth of 12 inches and compact it as specified for the adjacent fill.

3.3.2 Frozen Material

Do not place material on surfaces that are muddy, frozen, or contain frost. Finish compaction by or other approved equipment well suited to the soil being compacted. Moisten material as necessary to provide the moisture content that will readily facilitate obtaining the specified compaction with the equipment used.

3.4 UTILIZATION OF EXCAVATED MATERIALS

Dispose unsatisfactory materials removing from excavations into designated waste disposal or spoil areas. Submit procedure and location for disposal of unused satisfactory material. Stockpile and use coarse rock for constructing slopes or embankments adjacent to streams, or sides and bottoms of channels and for protecting against erosion. Do not dispose excavated material to obstruct the flow of any stream, endanger a partly finished structure, impair the efficiency or appearance of any structure, or be detrimental to the completed work in any way.

3.5 FILLING AND COMPACTION

Place backfill adjacent to any and all types of structures, in successive horizontal layers (lifts) of loose material not more than 8 inches in depth. Lift thicknesses may need to be reduced depending on compaction method to achieve. For hand operated compaction equipment loose lift thickness shall not exceed 6 inches. Compact to at least 90 percent of laboratory maximum dry density as determined by ASTM D1557 to prevent wedging action or eccentric loading upon or against the structure.

Backfill material must be within the range of -2 to +2 percent of optimum moisture content at the time of compaction.

Prepare ground surface on which backfill is to be placed and provide compaction requirements for backfill materials in conformance with the applicable portions of paragraphs GROUND SURFACE PREPARATION. Finish compaction vibratory compactors, or other approved equipment.

Provide materials that meet requirements and gradations with the applicable portions of DEFINTIONS and the plans and/or details.

3.6 SPECIAL REQUIREMENTS

Special requirements for both excavation and backfill relating to the specific utilities are as follows:

3.7 SUBGRADE PREPARATION

3.7.1 Construction

Remove soft or otherwise unsatisfactory material and replace with approved material as directed. Bring up low areas resulting from removal of unsatisfactory material or excavation of rock to required grade with satisfactory materials, and shape the entire subgrade to line, grade, and cross section and compact as specified.

3.7.2 Compaction

Finish compaction by vibratory compactors, or other approved equipment. Compact each lift of fill to at least 90 percent of laboratory maximum dry density as determined by ASTM D1557.

3.7.3 Verification and Testing

The Government will verify the compaction of the fill placed during construction activities and approve the subgrade for topsoil prior to placement. Contractor will adjust means and methods of fill placement and compaction as appropriate to meet the direction of the Government.

3.8 FINISHING

Finish the surface of subgrades to a smooth and compact surface in accordance with the lines, grades, and cross sections or elevations shown. Provide the degree of finish for graded areas within 0.1 foot of the grades and elevations indicated except that the degree of finish for subgrades specified in paragraph SUBGRADE PREPARATION. Finish gutters and ditches in a manner that will result in effective drainage. Repair graded, topsoiled, or backfilled areas prior to acceptance of the work, and re-established grades to the required elevations and slopes.

3.8.1 Subgrade

During construction, keep excavations shaped and drained. Maintain ditches and drains along subgrade to drain effectively at all times. Do not disturb the finished subgrade by traffic or other operation. Protect and maintain the finished subgrade in a satisfactory condition until topsoil is placed. Do not permit the storage or stockpiling of materials on the finished subgrade.

Do not lay topsoil until the subgrade has been checked and approved.

3.8.2 Grading Around Structures

Construct areas within 5 feet outside of each building and structure line true-to-grade, shape to drain, and maintain free of trash and debris until final inspection has been completed and the work has been accepted.

3.9 PLACING TOPSOIL

On areas to receive topsoil, prepare the compacted subgrade soil to a 2 inches depth for bonding of topsoil with subsoil.

Spread topsoil evenly to the thickness and slopes specified on the plans. Do not spread topsoil when frozen or excessively wet or dry.

3.10 DISPOSITION OF SURPLUS MATERIAL

Remove surplus material or other soil material not required or suitable for filling or backfilling, and brush, refuse, stumps, roots, and timber from Government property to an approved location.

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