APPENDIX A - Special Project Specs.pdf

APPENDIX A

SPECIAL PROJECT SPECIFICATIONS

Section 160 Page 1

Section 106 – Measure and Payment

Description

106.03 – Units of Measurement Delete this subsection and add the following:

“Forest Service Specifications for Construction of Roads and Bridges (Revised August 1996) are based on Modern Metric units of measurement. The dimensions and units of measure SHOWN ON THE DRAWINGS and used to develop SPECIAL PROJECT SPECIFICATIONS for this contract, utilize U.S.

Standard English units of measure. All measurements referenced in the August 1996 Forest Service Standard Specifications (EM-7720-100) shall be converted to U.S. Standard English units of measure.

Appendix A – Engineering Conversion Factors and Appendix B – SI (Modern Metric) Conversion Factors, are included on pages 611 – 614 of the Standard Specification Appendices to assist with any required conversions.

Work required by the contract will be paid based on the PAY UNIT (U.S. Standard English measure) as

DESIGNATED IN THE SCHEDULE OF ITEMS.

Under each Specification Section with PAY ITEMS of work DESIGNATED IN THE SCHDULE OF ITEMS for measurement and payment under this contract, the last subsection “Payment - Basis”, shall have the following format:

Pay Item - Numbering system and work description to remain the same.

Pay Unit - Pay unit(s) DESIGNATED IN THE SCHEDULE OF ITEMS have been changed from metric to the corresponding unit of U.S. Standard English measure.

Payment will be by units defined and determined according to U.S. Standard English measure and by the following:

(a) Acre.

(b) Cubic Yard in Place. Measure solid volumes by the average end area method as follows:

(1) Measure cross sections of the original ground and use with design or staked templates, or take other comparable measurements to determine the end area. Do not measure work outside of the established lines or slopes.

(2) If any portion of the work is acceptable, but is not completed to the established lines and slopes, re-measure cross sections or comparable measurements of that portion of the work. Deduct any quantity outside the designated or staked limits. Use these measurements to calculate new end areas.

(3) Compute the quantity using the average end areas multiplied by the horizontal distance along a centerline or reference line between the end areas. Deduct any quantity outside the designed or staked limits.

Where it is impractical to measure material by the average end area method, other approved methods involving three-dimensional measurements may be used.

(c) Cubic Yard in the Hauling Vehicle. Measure the cubic yard volume in the hauling vehicle using three-dimensional measurements at the point of delivery. Use vehicles bearing a legible identification mark with the body shaped so the actual contents may be readily and accurately determined. Before use, mutually agree in writing upon the volume of material to be hauled by each vehicle. Vehicles carrying less than the agreed volume may be rejected or accepted at the reduced volume.

Section 160 Page 2

Level selected loads. If leveling reveals that the vehicle was hauling less than the approved volume, reduce the quantity of all material received since the last leveled load by the same ratio as the ratio of the current leveled load volume to the agreed volume. Payment will not be made for material in excess of the agreed volume.

Material measured in the hauling vehicle may be weighed and converted to cubic yards for payment purpose if the conversion factors are mutually agreed to in writing.

Compute quantity by using measurements of material in the hauling vehicles at the point of delivery. Load vehicles to at least their water-level capacity. Leveling of the loads may be required when vehicles arrive at the delivery point.

(d) Hour. Measurement will be for the actual number of hours ordered and performed by the

Contractor.

(e) Each. One complete unit, which may consist of one or more parts.

(f) Foot. Measure from end to end, parallel to the feature being measured.

(g) Lump Sum. Do not measure directly. The bid amount is complete payment for all work described in the contract and necessary to complete the work for that item.

(h) Square Yard. Measure on a plane parallel to the surface being measure or horizontal.

(i) Ton. Short ton consisting of 2,000 pounds. Use net certified scale weights based on certified volumes.

SPS 160 QUALITY CONTROL AND QUANTITY MEASUREMENT

Section 160, Quality Control and Quantity Measurement (Subsection 160.02) Add the following:

Under (a) Quality Control Plan:

(3) Description of the testing facilities and information on when and where each of the required materials tests will be performed.

(4) Random sampling and/or measurement plan prepared in accordance with requirements in

Table 160.

(5) A log of all samples that are taken by the CONTRACTOR shall be maintained for the duration of the contract and provided to the CO upon request. Test results on all samples shall be given directly to the CO within 8 hours of test completion.

Section 160, Sampling, Testing, Inspection, and Measurement of Quantities (Subsection 160.03) Add the following:

Minimum sampling and testing frequency is defined in Table 160. Sampling and testing by the CONTRACTOR shall meet the applicable AASHTO and ASTM Standards. The minimum frequency shown in Table 160 is for CONTRACTOR Quality Control sampling and testing.

Unless waived by the CO, the CO will inspect both sampling and testing equipment and procedures prior to production. The testing laboratory (including equipment and personnel) shall be operational and available for inspection at least 2 days prior to producing aggregate for acceptance. The testing facility shall be located far enough from construction machinery to avoid harmful vibrations. The following requirements are applicable for aggregate crushing projects:

(a) Initial sampling of material shall occur as follows:

Section 160 Page 3

(1) For onsite produced materials after additions of any blending material - at crushing or screening plants, and if necessary off the road surface to check the consistency of blended materials.

(2) For commercially produced aggregates - at the producer's plant or stockpile;

(b) The CONTRACTOR shall equip crushing, screening, and mixing plants with sampling devices that are designed to take a representative sample. Sampling shall be done in accordance with

AASHTO T2.

(c) Gradation Testing

(1) Gradation test results shall be available for Forest Service review.

(2) Sieving of coarse aggregate (plus No. 4 material), shall be done in accordance with

AASHTO T27, except that the difference between the total weight of material after sieving must be within 1.0% of the original weight of sample sieved. The AASHTO requirement of 0.3% is changed to 1.0% for only coarse aggregate sieving.

(3) To assure adequate and consistent washing is performed, the weight of minus No. 200 by dry sieving after washing shall not be more than 5 grams above the allowable weight established by the CO during the test procedure check at the start of the project.

(4) The entire sample shall be washed with water containing dispersing agent, unless the CO determines that washing the plus No. 4 material is not necessary, and such waiver is approved in writing.

(5) All tests shall be recorded on forms approved by the CO.

(d) A representative split prepared in accordance with AASHTO T248 of each field sample shall be adequately identified and retained by the CONTRACTOR for the duration of the contract. The CONTRACTOR shall also take additional samples as directed by the CO. These duplicate and additional samples shall be made available to the CO for quality assurance testing by the Forest Service. Duplicate and additional samples shall be placed in sample containers that are provided by the CONTRACTOR and approved by the CO. The containers and samples will become the property of the government.

(e) To verify sampling and testing accuracy, the CONTRACTOR, upon request of the CO, shall take a

220 pound random sample from the completed stockpile or road surface for quality assurance testing by the Forest Service for each 5,000 tons of aggregate produced.

Samples of completed stockpiles shall be taken with a front end loader by digging into the pile so that all layers are represented in the sample. If requested by the CO, the CONTRACTOR shall take samples from each lift of the stockpile as it is being built. Each sample taken from a location in the completed stockpile or lift of the stockpile shall be dumped into a miniature stockpile and sampled by AASHTO T 2.

Road surface samples shall be obtained by recovering all material from a trench across the full width and full depth of the aggregate layer or windrow. Underlying material must be excluded.

If results from samples indicate the material is out of specification, acceptance of the material will be based on a new set of random samples taken under the direction of the CO and tested by the CONTRACTOR in accordance with paragraphs (c) and (d) above.

(f) The initial sampling and testing shall not be considered a final acceptance and shall not preclude later Forest Service quality assurance sampling and testing to check for compliance with gradation

Section 160 Page 4 and plasticity requirements after final processing of the material. Such sampling shall not relieve the CONTRACTOR of the responsibility of providing quality control measures to ensure compliance with contract requirements.

(g) If Forest Service quality assurance tests on samples taken in accordance with paragraphs (d), (e), or (f) vary from the CONTRACTOR's test results, additional quality assurance sampling and testing may be required at an independent laboratory selected by the Forest Service. The allowable difference between the CONTRACTOR's gradation results and the quality assurance test results shall be 2% for percent passing the No. 200 sieve and 4.5% for percent passing all other sieves listed in the applicable specification. If the quality assurance and CONTRACTOR test results do not compare within the stated allowable differences, the Forest Service may take the following action:

(1) Use the quality assurance sample test results for acceptance.

(2) Reduce payment by one hundred dollars for each of the CONTRACTOR tests that are defective.

(h) Table 160 Notes:

A soil type is defined such that all soil in the represented volume shall have the same group symbol in the Unified Soil Classification System (ASTM D2487) and the percent passing the No. 4 sieve shall not vary more than 10 percent between samples.

Wherever AASHTO T99 or T180 moisture density curve is required, gradation data will be provided as shown below. The moisture density sample shall maintain the same percentage of coarse material (passing 2 inch and retained on a number 4 sieve) as in the original field sample. Field density testing of soil will normally require the use of AASHTO T224 (coarse particle correction).

Field Sample Moisture Density Test Material Percent plus 0.75 inch Percent plus No. 4 Percent 0.75 inch to No. 4 sieve Percent minus No. 4 sieve

Section 160 Page 5

TABLE 160

Sampling, Testing and Measurement Requirements

Item Characteristic Test Method Minimum Frequency Responsibility

Construction Tolerances Measurement 24 inches horizontal

4 inches vertical Subgrade, Final

Grade CT

Riprap Particle Distribution ASTM-D 5519 Method B

Every 500 yd3 of every type of Riprap CT

Imported Granular Material (e.g., surface course aggregate, filter gravel, drainage gravel)

Particle Distribution ASTM C136, C117, D422, D1140

Every 500 yd3 of every type CT

Limestone Calcium Carbonate Equivalent (CCE)

ASA 11-2.4 Every 100 ton CT

Compost

Total Nitrogen ASA 31-3 Every 200 yd3 CT

% Organic Matter ASTM D2974 Every 200 yd3 CT

Moisture Content ASTM D2216 Every 200 yd3 CT

Organic Carbon ASA 29-3.5.2 Every 200 yd3 CT

Notes: The FREQUENCY shown in this table is for CONTRACTOR Quality Control sampling and testing; a minimum of one sample per material type must be tested; additional samples can be run. Additional samples can be taken in any manner and at any time. Quality assurance sampling and testing by the Forest Service may be done at any time or location; CT --Sampling and testing by CONTRACTOR's personnel identified by name on the approved CONTRACTOR's Q/C plan. Interim approval of personnel submitted will be based on specified training or experience requirements. Final approval will be based on observation of work performance.

ASA = American Society of Agronomy, Methods of Soil Analysis.

ASTM = American Society of Testing Materials.

Where random sample or random measurement is specified, it shall be a stratified, statistically random sample. Random numbers are to be determined by ASTM D3665 Section 5.1 through 5.7, or a computer generated random number program approved by the CO. The sampling must be stratified to eliminate the possibility of sample points being "clustered". Stratification is done by dividing the total quantity for the applicable bid item by the sample frequency. This process divides the total project quantity of one lot into sublots. The random number is used to obtain a random sampling point within each sublot. The CONTRACTOR may terminate a lot, and start a new lot when approved by the CO.

Once a lot is terminated, it may not be combined with any other lot. If material within a sublot fails to meet specification requirement, the CO may allow the CONTRACTOR to rework the sublot materials and resample at a different randomly selected location.

Section 311 Page 1

Section 311 – Local Slash and Logs

Description

311.01 - Work Work shall consist of stockpiling non-structural timbers, ties, brush, trees, and/or other deadfall collected from slopes in immediate vicinity. Place stockpiled slash and logs along edges of roadway to define route of travel. Define roadway with local slash and logs at locations SHOWN ON THE DRAWINGS and as indicated on the Road Log for specific routes.

Materials

311.02 - Requirements

Local Slash and Logs

The local slash used for defining road segments shall be collected from nearby slopes and/or stockpiled from sources generated during other activities as authorized by CO. Slash will not contain significant earthen component. Additionally all trash will be removed from slash prior to stockpiling and/or use along roads. Logs and timbers used for defining road segments shall be collected from nearby slopes and/or stockpiled from sources generated during other activities. Timbers and ties used to define roads will not contain creosote or other similar treatments used for wood preservation. Logs and timbers used to define roadways will not include diameters greater than 12-inches.

Local slash and logs will consist of one or more of the following acceptable sources of materials:

• Unrooted brush and shrubs;

• Tree limb deadfalls;

• Slabbed log spoils (bark, stripped branches, etc.);

• Loose tree stumps;

• Standing dead growth damaged by Pine Beetle;

• Natural deadfall tree trunks (diameter equal to or less than 12-inches);

• Non-structural timbers removed during other activities (sign posts, etc.); and

• Firewood spoils.

Construction

311.03 – Construction Local slash and logs materials shall be placed in along roadway to an approximate height of 18-inches. Materials shall be placed approximately one foot outside the route of travel on both side of the road at the locations and lengths indicated on the Road Log for specific routes. Care will be taken to ensure material placement forms continuous barricade to vehicular traffic throughout span of placement.

Measurement

311.04 - Method Use the Method of Measurement designated in the SCHEDULE OF ITEMS.

Payment

311.05 - Basis The quantities will be paid for at the contract unit price for each PAY ITEM DESIGNATED IN THE SCHEDULE OF ITEMS. Payment will be made under:

Pay Item Pay Unit

311 (01) Local Slash and Logs ...................................................................................... Foot

Section 661 Page 1

Section 661 –Calcium Carbonate Amendment

Description

661.01 - Work The work includes, but is not necessarily limited to, all labor, materials, equipment, and services required to furnish, apply, and thoroughly mix soil with calcium carbonate amendment.

Materials

661.02 - Requirements

Calcium Carbonate Amendment – Calcium Carbonate amendment shall be a suitable neutralizing amendment that can be applied in a dry condition to soil. The Calcium Carbonate amendment shall have an effective calcium carbonate equivalent (CCE) neutralizing capacity of 1.0, or an adjustment shall be made to the application rate to either increase or decrease the amount of amendment to apply. Calcium Carbonate amendment may not be cement kiln dust.

Lime kiln dust, agricultural limestone, calcium oxide product, or other approved source may be used.

Gradation: The following gradation shall be met: 100% passing 2.0 millimeters (No. 10 sieve) 50% passing 250 micrometers (No. 60 sieve)

Calcium carbonate amendment shall be delivered to the site in a dry condition and kept dry until mixed.

Calcium Carbonate Equivalent (CCE) shall be determined by the following method: U.S. EPA, Field and Laboratory Methods Applicable to Overburdens and Minesoils, Cincinnati, Ohio, EPA-600/2-78-054.

Construction

661.03 - Method Soil shall be amended with calcium carbonate amendment at the rates specified in applicable sections of these specifications. Adjust the amendment rate AS SHOWN ON THE DRAWINGS based on the CCE of the CONTRACTOR provided amendment. Calcium Carbonate Amendment shall be evenly incorporated and completely mixed with the soil.

Measurement

661.04 - Method Use the Method of Measurement designated in the SCHEDULE OF ITEMS.

Measure the Calcium Carbonate Amendment provided, adjusted for CCE, mixed by the CONTRACTOR, and paid for by the English ton in vehicles at the point of delivery. The CONTRACTOR shall provide proof of delivery based on manifested truck tickets from the supplier.

Payment

661.05 - Basis The quantities will be paid for at the contract unit price for each PAY ITEM DESIGNATED IN THE SCHEDULE OF ITEMS. Payment will be made under:

Pay Item Pay Unit

661 (01) Calcium Carbonate Amendment ............................................................................ ...... Ton

Section 661 Page 2

Section 705 – RipRap

Materials

ADD to following to Table 705-1 Gradation Requirements for Riprap

Class % of Rock by Mass Mass (kg) Approximate Cubic

Dimension 3inch Riprap 20

10-15 5-10 0.5-5 0-.5

100-150 75-100 25-75 0-25