2023-4400 - SEC 700 Technical Specifications.pdf

Bidding Requirements, Contract Forms and Conditions of the Contract Technical Specifications Section 00700

Page 1 of 3 Technical Specifications

1.0 General Specifications

1.1 These specifications shall cooperate with the accompanying plans in every detail so that any item or any work that may be specified herein and not shown on the plans, or vice-versa, is to be executed the same as if occurring in both. Any items of labor or materials which are not shown on the drawings or mentioned in these specifications but are nevertheless necessary for the proper completion of the construction, are to be provided for by the CONTRACTOR in this bid.

1.2 Should any drawings or figures be omitted on the scale which are necessary for a clear and comprehensive understanding, it will be the duty if the CONTRACTOR to advise the proper parties and in no case proceed with work in uncertainty.

1.3 All labor is to be performed in a skillful, thorough manner.

1.4 All material to be of the dimension and grade as herein specified.

1.5 The CONTRACTOR and all SUBCONTRACTORS shall comply with all federal, state and local laws, codes and ordinances applicable to the work including, but not limited to, preparing and implementing a Storm Water Pollution Prevention Plan (SW3P) and compliance with the temporary BMPs outlined in the TCEQ approved Contributing Zone Plan (CZP). The applicable Temporary BMPs section from the TCEQ approved CZP have been provided. CONTRACTOR may request entire TCEQ approved CZP.

1.5.1 The CONTRACTOR shall be responsible for obtaining and paying for any and all permits and fees required in the execution of the work.

1.5.2 Under no circumstances shall any work be started before the required permits are obtained or fees paid.

1.5.3 The OWNER shall be furnished with certified copies of all permits.

1.5.4 The CONTRACTOR shall cooperate with all local and other governmental officials and inspectors at all times.

1.6 The CONTRACTOR shall protect all persons and property throughout the progress until the completion of the work.

1.6.1 Work shall proceed in such a manner as to minimize the spread of dust and flying particles and to provide safe working conditions for all personnel.

1.6.2 Work shall proceed in such a manner as will not interfere with existing surface drainage in the streets and areas adjacent to the project.

1.6.3 CONTRACTOR shall be responsible for all traffic control and shall follow the Texas Manual on Uniform Traffic Control Devices (TMUTCD) accordingly.

CONTRACTOR shall leave one lane of traffic open at all times during the project.

1.7 During the course of their work, all craftsmen and tradesmen shall protect all work which precedes theirs from damage and they shall make repairs and/or replacements of any damage caused either directly or indirectly by them.

Page 2 of 3 Technical Specifications

1.8 CONTRACTOR is responsible for providing all necessary materials, labor and equipment to complete the project. All waste material must be removed from the site at the CONTRACTOR’S sole expense.

1.9 Limits of the parking lot have been established by the OWNER and marked in the field accordingly. Cut and fill elevations to final grade have also been marked by OWNER in the field on wooden lathes.

1.10 CONTRACTOR shall lay out and correctly establish all lines, levels, grades and positions of all parts of the work, and shall be responsible for their accuracy and proper correlation with existing control lines, monuments and data points. Control lines, monuments and data points shall be carefully preserved by the CONTRACTOR, and if displaced, shall be reset by the CONTRACTOR at the CONTRACTOR’S own expense. All such resetting work shall be subject to the OWNER’s approval.

2.0 Preparing ROW (TxDOT Specification 100)

2.1 CONTRACTOR shall clear areas shown on the plans within the area of the proposed parking area. CONTRACTOR shall clear all obstructions

3.0 Excavation (TxDOT Specification 110)

3.1 CONTRACTOR shall excavate areas as shown on the plans and as outlined in the field by wooden lathes established by the OWNER.

3.2 Compaction of subgrade shall comply with Article 132.3.D of the TxDOT Standard Specifications.

3.3 Testing of compaction shall be performed by laboratory hired by OWNER.

3.4 Any excess excavation must be removed from the site by the CONTRACTOR.

4.0 Embankment (TxDOT Specification 132)

4.1 CONTRACTOR shall furnish, place and compact materials for construction of embankment in areas as shown on the plans and as outlined in the field by wooden lathes established by the OWNER.

4.2 Compaction of embankment shall comply with Article 132.3.D of the TxDOT Standard Specifications.

4.3 Testing of compaction shall be performed by laboratory hired by OWNER.

5.0 Topsoil (TxDOT Specification 160)

5.1 Topsoil shall be placed in the areas marked as “Proposed Engineered V.F.S.” to the limits shown on the plans to a depth of four inches (4”) and 15’ wide.

5.2 CONTRACTOR shall ensure that the finished elevation of the topsoil shall be at the same elevation as the finished elevation of the seal coated parking lot.

Page 3 of 3 Technical Specifications

6.0 Hydromulch (TxDOT Specification 164)

6.1 CONTRACTOR shall place bermudagrass by the cellulose fiber mulch seeding construction method in the areas marked as “Proposed Engineered V.F.S.” as shown on the plans. Cellulose fiber mulch seeding shall be placed at a rate of 2,500 lb. per acre.

7.0 Flexible Base (TxDOT Specification 247)

7.1 CONTRACTOR shall place six inches (6”) of Type A Grade 2 flexible base material to the limits shown on the plans and marked in the field. Requirement of measurement of six inches of flexible base shall be post-compaction.

7.2 Flexible base shall be compacted to 95% of the maximum density determined by the testing laboratory.

7.3 Maximum lift of pre-compacted flexible base shall be eight inches (8”).

7.4 Medians within the parking lot shall not have flexible base placed in the limits shown on the plans.

8.0 Surface Treatment (TxDOT Specification 316)

8.1 CONTRACTOR shall place prime coat (CSS-1H) at a rate of 0.15 gallons per square yard to treat the compacted base.

8.2 CONTRACTOR shall place a two course surface treatment according to the following specifications:

8.2.1 First course tack coat shall be HFRS-2P placed at a rate of 0.40 gallons per square yard.

8.2.2 First course stone shall be Grade 3, Type B, placed at a rate of one (1) cubic yard per ninety (90) square yards.

8.2.3 Second course tack coat shall be HFRS-2P placed at a rate of 0.37 gallons per square yard.

8.2.4 Second course stone shall be Grade 4, Type PB placed at a rate of one

(1) cubic yard per one hundred (100) square yards.

8.3 Areas marked as “Proposed Engineered V.F.S.” shall not have surface treatment placed in the limits shown on the plans.

9.0 All aspects of construction shall be in accordance with the 2004 Texas Department of Transportation Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges. A copy of these specifications can be found at the website, http://www.dot.state.tx.us/business/specifications.htm http://www.dot.state.tx.us/business/specifications.htm

PROPOSED BASEBALL PRACTICE FACILITY

(72'x125')

ADDITIONAL 9,000 SF I.C.

PROPOSED SOCCER

STORAGE

(30'x60')

ADDITIONAL 1,800 SF I.C.

PROPOSED ASPHALT PARKING

AND ACCESS DRIVE

ADDITIONAL 59,921.54 SF I.C.

145 PARKING SPOTS

PROPOSED ASPHALT PARKING

ADDITIONAL 23,866.47 SF I.C.

NET GAIN 84 PARKING SPOTS

ACCESS DRIVE SHOWN FOR REFERENCE ONLY

IMPERVIOUS COVER ACCOUNTED FOR IN 2010 CZP

PROPOSED 6' PEDESTRIAN TRAIL

(GRAVEL)

PROPOSED

ENGINEERED V.F.S

PROPOSED

ENGINEERED V.F.S

PROPOSED

ENGINEERED V.F.S

PROPOSED

ENGINEERED V.F.S

PROPOSED NATURAL VEGETATIVE

FILTER STRIP

(50' WIDTH MINIMUM)

PROPOSED NATURAL VEGETATIVE FILTER STRIP

(50' WIDTH MINIMUM)

PROPOSED ENGINEERED VEGETATIVE FILTER STRIP

(15' WIDTH MINIMUM)

(2) SETS OF PROPOSED

TENNIS COURTS

(120'x108' EACH)

ADDITIONAL 25,920 SF I.C.

PROPOSED ENGINEERED V.F.S.

PROPOSED ROOF STRUCTURE

PROPOSED SIDEWALK

(5' WIDTH)

(2) PROPOSED PICKLE BALL COURTS

(44'x60' EACH)

ADDITIONAL 10,560 SF I.C.

PROPOSED ADDITION TO EXISTING BUILDING

(25'x75')

ADDITIONAL 1,875 SQ FT I.C.

EXH 2

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100'0' 200'50'

SCALE IN FEET

NOTES:

1. EXISTING UTILITIES IN APPROXIMATE LOCATION. IT IS THE

CONTRACTORS'S RESPONSIBILITY TO NOTIFY THE TEXAS ONE

CALL CENTER PRIOR TO THE STATE OF ANY CONSTRUCTION. IT IS

THE CONTRACTORS'S RESPONSIBILITY TO FIELD VERIFY THE

EXACT LOCATION AND DEPTH OF ALL EXISTING UTILITIES BEFORE

COMMENCING WORK.

2. ALL UTILITY SYMBOLS SHOWN REPRESENT APPROXIMATE

LOCATIONS UNLESS OTHERWISE NOTED. CONTRACTOR SHALL

REFER TO THE APPROPRIATE AGENCY'S STANDARD

SPECIFICATIONS AND INSTALLATION DETAILS FOR ACTUAL

LOCATIONS UNLESS OTHERWISE DIRECTED BY THE ENGINEER.

LEGEND

EXISTING MAJOR CONTOUR

EXISTING MINOR CONTOUR

PROPERTY LINE

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SPECIAL FLOOD HAZARD

AREA (1% ANNUAL CHANCE)

SPECIAL FLOOD HAZARD

AREA (1% ANNUAL CHANCE)

EXISTING DRAINAGE PATTERNS

01/05/2022

TCEQ-0602 (Rev. 02-11-15)

Aboveground storage tanks with a cumulative storage capacity between 250 gallons and 499 gallons will be stored on the site for less than one (1) year.

Aboveground storage tanks with a cumulative storage capacity of 500 gallons or more will be stored on the site. An Aboveground Storage Tank Facility Plan application must be submitted to the appropriate regional office of the TCEQ prior to moving the tanks onto the project.

Fuels and hazardous substances will not be stored on the site.

2. Attachment A - Spill Response Actions. A site specific description of the measures to be taken to contain any spill of hydrocarbons or hazardous substances is attached.

3. Temporary aboveground storage tank systems of 250 gallons or more cumulative storage capacity must be located a minimum horizontal distance of 150 feet from any domestic, industrial, irrigation, or public water supply well, or other sensitive feature.

4. Attachment B - Potential Sources of Contamination. A description of any activities or processes which may be a potential source of contamination affecting surface water quality is attached.

Sequence of Construction

5. Attachment C - Sequence of Major Activities. A description of the sequence of major activities which will disturb soils for major portions of the site (grubbing, excavation, grading, utilities, and infrastructure installation) is attached.

For each activity described, an estimate (in acres) of the total area of the site to be disturbed by each activity is given.

For each activity described, include a description of appropriate temporary control measures and the general timing (or sequence) during the construction process that the measures will be implemented.

6. Name the receiving water(s) at or near the site which will be disturbed or which will receive discharges from disturbed areas of the project: Cypress Creek

Temporary Best Management Practices (TBMPs)

Erosion control examples: tree protection, interceptor swales, level spreaders, outlet stabilization, blankets or matting, mulch, and sod. Sediment control examples: stabilized construction exit, silt fence, filter dikes, rock berms, buffer strips, sediment traps, and sediment basins. Please refer to the Technical Guidance Manual for guidelines and specifications. All structural BMPs must be shown on the site plan.

7. Attachment D – Temporary Best Management Practices and Measures. TBMPs and measures will prevent pollution of surface water, groundwater, and stormwater. The construction-phase BMPs for erosion and sediment controls have been designed to retain sediment on site to the extent practicable. The following information is attached:

A description of how BMPs and measures will prevent pollution of surface water, groundwater or stormwater that originates upgradient from the site and flows across the site.

A description of how BMPs and measures will prevent pollution of surface water or groundwater that originates on-site or flows off site, including pollution caused by contaminated stormwater runoff from the site.

A description of how BMPs and measures will prevent pollutants from entering surface streams, sensitive features, or the aquifer.

A description of how, to the maximum extent practicable, BMPs and measures will maintain flow to naturally-occurring sensitive features identified in either the geologic assessment, TCEQ inspections, or during excavation, blasting, or construction.

8. The temporary sealing of a naturally-occurring sensitive feature which accepts recharge to the Edwards Aquifer as a temporary pollution abatement measure during active construction should be avoided.

Attachment E - Request to Temporarily Seal a Feature. A request to temporarily seal a feature is attached. The request includes justification as to why no reasonable and practicable alternative exists for each feature.

There will be no temporary sealing of naturally-occurring sensitive features on the site.

9. Attachment F - Structural Practices. A description of the structural practices that will be used to divert flows away from exposed soils, to store flows, or to otherwise limit runoff discharge of pollutants from exposed areas of the site is attached. Placement of structural practices in floodplains has been avoided.

10. Attachment G - Drainage Area Map. A drainage area map supporting the following requirements is attached:

For areas that will have more than 10 acres within a common drainage area disturbed at one time, a sediment basin will be provided.

For areas that will have more than 10 acres within a common drainage area disturbed at one time, a smaller sediment basin and/or sediment trap(s) will be used.

For areas that will have more than 10 acres within a common drainage area disturbed at one time, a sediment basin or other equivalent controls are not attainable, but other TBMPs and measures will be used in combination to protect down slope and side slope boundaries of the construction area.

There are no areas greater than 10 acres within a common drainage area that will be disturbed at one time. A smaller sediment basin and/or sediment trap(s) will be used in combination with other erosion and sediment controls within each disturbed drainage area.

There are no areas greater than 10 acres within a common drainage area that will be disturbed at one time. Erosion and sediment controls other than sediment basins or sediment traps within each disturbed drainage area will be used.

11. Attachment H - Temporary Sediment Pond(s) Plans and Calculations. Temporary sediment pond or basin construction plans and design calculations for a proposed temporary BMP or measure have been prepared by or under the direct supervision of a

Texas Licensed Professional Engineer. All construction plans and design information must be signed, sealed, and dated by the Texas Licensed Professional Engineer.

Construction plans for the proposed temporary BMPs and measures are attached.

N/A

12. Attachment I - Inspection and Maintenance for BMPs. A plan for the inspection of each temporary BMP(s) and measure(s) and for their timely maintenance, repairs, and, if necessary, retrofit is attached. A description of the documentation procedures, recordkeeping practices, and inspection frequency are included in the plan and are specific to the site and/or BMP.

13. All control measures must be properly selected, installed, and maintained in accordance with the manufacturer’s specifications and good engineering practices. If periodic inspections by the applicant or the executive director, or other information indicate a control has been used inappropriately, or incorrectly, the applicant must replace or modify the control for site situations.

14. If sediment escapes the construction site, off-site accumulations of sediment must be removed at a frequency sufficient to minimize offsite impacts to water quality (e.g., fugitive sediment in street being washed into surface streams or sensitive features by the next rain).

15. Sediment must be removed from sediment traps or sedimentation ponds not later than when design capacity has been reduced by 50%. A permanent stake will be provided that can indicate when the sediment occupies 50% of the basin volume.

16. Litter, construction debris, and construction chemicals exposed to stormwater shall be prevented from becoming a pollutant source for stormwater discharges (e.g., screening outfalls, picked up daily).

Soil Stabilization Practices

Examples: establishment of temporary vegetation, establishment of permanent vegetation, mulching, geotextiles, sod stabilization, vegetative buffer strips, protection of trees, or preservation of mature vegetation.

17. Attachment J - Schedule of Interim and Permanent Soil Stabilization Practices. A schedule of the interim and permanent soil stabilization practices for the site is attached.

18. Records must be kept at the site of the dates when major grading activities occur, the dates when construction activities temporarily or permanently cease on a portion of the site, and the dates when stabilization measures are initiated.

19. Stabilization practices must be initiated as soon as practicable where construction activities have temporarily or permanently ceased.

Administrative Information

20. All structural controls will be inspected and maintained according to the submitted and approved operation and maintenance plan for the project.

21. If any geologic or manmade features, such as caves, faults, sinkholes, etc., are discovered, all regulated activities near the feature will be immediately suspended. The appropriate TCEQ Regional Office shall be immediately notified. Regulated activities must cease and not continue until the TCEQ has reviewed and approved the methods proposed to protect the aquifer from any adverse impacts.

22. Silt fences, diversion berms, and other temporary erosion and sediment controls will be constructed and maintained as appropriate to prevent pollutants from entering sensitive features discovered during construction.

Attachment A

Spill Response Action

The following steps shall help reduce the stormwater impacts of leaks and spills:

The contractor shall be aware that different materials pollute in different amounts. Make sure that each employee knows what a “significant spill” is for each material they use, and what is an appropriate response for “significant” and “insignificant” spills. Employees should also be aware of when spill must be reported to the TCEQ. Information available in 30 TAC 327.4 and 40 CFR 302.4. Have contractor’s superintendent or representative oversee and enforce proper spill prevention and control measures.

More information on spill rules and appropriate responses is available on the TCEQ website at http://www.tnrcc.state.tx.us/enforcement/emergency_response.html

General:

• To the extent that the work can be accomplished safely, spills of oil, petroleum products, substances listed under 40 CFR parts 110, 117, and 302, and sanitary and septic wastes should be contained and cleaned up immediately.

• Store hazardous materials and wastes in covered containers and protect form vandalism.

• Place a stockpile of spill cleanup materials where it shall be readily accessible.

• Train employees in spill prevention and cleanup.

• Designate responsible individuals to oversee and enforce control measures.

• Spills should be covered and protected from stormwater runon during rainfall to the extent that it doesn’t compromise clean up activities.

• Do not bury or wash spills with water.

• Store and dispose of used clean up materials, contaminated materials, and recovered spill material that is no longer suitable for the intended purpose in conformance with the provisions in applicable BMPs.

• Do not allow water used for cleaning and decontamination to enter storm drains or watercourses. Collect and dispose of contaminated water in accordance with applicable regulations.

• Contain water overflow or minor water spillage and do not allow it to discharge into drainage facilities or watercourses.

• Place Material Safety Data Sheets (MSDS), as well as proper storage, cleanup, and spill reporting instructions for hazardous materials stored or used on the project site in an open, conspicuous, and accessible location.

• Keep waste storage areas clean, well organized, and equipment with ample cleanup supplies as appropriate for the materials being stored. Perimeter controls, containment structures, covers, and liners should be repaired or replaced as needed to maintain proper function.

Cleanup:

• Spills shall be cleaned immediately.

• Use a rag for small spills on paved surfaces, a damp mop for general mop for general cleanup, and absorbent material for larger spills. All hazardous materials must be disposed of as hazardous waste.

• Never hose down or bury dry material spills. Clean up as much as the material as possible and dispose of properly. See the waste management BMPs in this section for specific information.

Minor Spills:

• Minor spills typically involve small quantities of oil, gasoline, paint, etc. which can be controlled by the first responder at the discovery of the spill.

• Use absorbent material on small spills rather than hosing down or burying the spill.

Absorbent material should be promptly removed and disposed of properly.

• Follow the practice below for a minor spill:

• Contain the spread of the spill.

• Recover spilled material.

• Clean the contaminated area and properly dispose of contaminated materials.

Semi-Significant Spills:

Semi-significant spills still can be controlled by the first responder along with the aid of other personnel such as laborers and the foreman, etc. This response may require the cessation of all other activities.

Spills should be cleaned up immediately:

• Contain spread of the spill

• Notify the project foreman immediately.

• If the spill occurs on paved or impermeable surfaces, clean up using “dry” methods (absorbent materials, cat litter and/or rags). Contain the spill by encircling with absorbent materials and do not let the spill spread widely.

• If the spill occurs in dirt areas, immediately contain the spill be constructing an earthen dike. Dig up and properly dispose of contaminated soil.

• If the spill occurs during rain, cover spill with tarps or other material to prevent contaminating runoff.

Significant/Hazardous Spills:

For significant or hazardous spills that are in reportable quantities:

• Notify the TCEQ by telephone as soon as possible and within 24 hours at 512-339- 2929 (Austin) or 210-490-3096 (San Antonio) between 8 AM and 5 PM. After hours, contact the Environmental Release Hotline at 1-800-832-8224. It is the contractor’s responsibility to have all emergency phone numbers at the construction site.

• For spills of federal reportable quantities, in conformance with the requirements in 40 CFR parts 110, 119, and 302, the contractor should notify the National Response Center at (800) 424-8802.

• Notification should first be made by telephone and followed up with a written report.

• The services of a spills contractor or a Haz-Mat team should be obtained immediately. Construction personnel should not attempt to clean up until the appropriate and qualified staffs have arrived at the job site.

• Other agencies which may need to be consulted include, but are not limited to, the County Sheriff Office, Fire Departments, etc.

Attachment B

Potential Sources of Contamination

• Source: Construction Equipment and other Vehicle leaks: Oil, grease, fuel and hydraulic fluids o Preventative measure: Lubrication and fueling shall be performed in a designated area. This area shall be monitored daily for contamination.

• Source: Miscellaneous trash and litter form construction workers.

o Preventative measure: Designated containers shall be located on site for trash disposal.

• Source: Construction debris.

o Preventative measure: Debris shall be collected weekly and deposited in on site bins for offsite disposal. Situations requiring immediate attention shall be handled on a case by case basis.

• Source: Asphalt products.

o Preventative measure: After placement of asphalt, emulsion or coatings, the contractor shall be responsible for immediate cleanup should an unexpected rain occur. For the duration of the asphalt product curing time, the contractor shall maintain standby personnel and equipment to maintain and asphalt wash-off should and unexpected rain occurs. The contractor shall be instructed not to place asphalt products on the ground within 48 hours of a forecasted rain.

• Source: Tar, fertilizers, cleaning solvents, detergents, and petroleum-based products.

o Preventative measure: The contractor shall be responsible for immediate cleanup should an unexpected rain occur. Debris shall be collected weekly and deposited in on site bins for offsite disposal. Situations requiring immediate attention shall be handled on a case by case basis.

Attachment C

Sequence of Major Activities

1. Install erosion and sedimentation controls as indicated on the construction plan(s) and as directed by agencies having authority in the project area.

2. Construct, proposed development site work included but not limited to, pavement, and utilities.

3. Install landscaping, vegetated blankets, or hydro-mulch to exposed areas

4. Re-vegetate disturbed areas

5. Remove temporary erosion and sedimentation controls

6. Vertical construction.

Construction entrances for site shall be accessed from Jumbo Evans Boulevard.

Attachment D

Temporary Best Management Practices and Measures

All Temporary BMPs shall be installed prior to the beginning of site preparation and construction activities as per the Storm Water Pollution Prevention Plan. The TBMPs shall remain in place and shall be maintained until all construction has ceased and a perennial vegetative cover with a density of 70 percent has been established.

a) Description of BMPs and measures to prevent pollution of surface water, groundwater or stormwater that originates upgradient from the site and flows across the site: Stabilized Construction Entrance, Silt fences and rock berms shall be utilized for these purposes.

b) Description of BMPs and measures to prevent pollution of surface water or groundwater that originates on-site or flows off site, including pollution caused by contaminated stormwater runoff from the site: Stabilized Construction Entrance, Silt fences and rock berms shall be utilized for these purposes.

c) Surface stream and feature protection: A 50-foot radius natural buffer zone adjacent to and upgradient of any sensitive features shall remain undisturbed so that rainfall may continue to enter the feature. The natural vegetated areas shall ensure that pre-development stormwater quantity and quality shall continue to recharge the aquifer via the feature. Rock berms shall be placed downgradient of all construction activities so that potentially contaminated stormwater may be treated before leaving the sited and entering downstream surface water.

d) Naturally occurring sensitive features protection: No construction shall occur within a 50-foot radius of naturally-occurring sensitive features. The vegetative buffer zone shall serve as both TMBP and BMP for the sensitive features. In the case that construction activities occur upgradient of a sensitive feature (greater than the 50-foot radius) the disturbed soils shall be protected from erosion by silt fences as outlined above.

Attachment E

Request to Temporarily Seal a Feature

NOT APPLICABLE

Attachment F

Structural Practices

The structural practices that shall limit runoff discharge of pollutants form exposed areas of the site shall be the use of a stabilized construction entrance, rock berms and silt fences to prevent the excavated material from leaving the site.

Attachment G

Drainage Area Map

EXH

OFFSITE DRAINAGE BOUNDARY

WHITEWATER RV RESORT

SCALE: NTS

Site Drainage Area

CONTACT

1659 STATE HWY 46 WEST, STE 115-438

NEW BRAUNFELS, TX 78132

TEL: (816) 510-9151

TX2 ENGINEERING

SHEET

FIRM #: 20787

JUMBO EVANS SPORTS

PARK

Attachment H

Temporary Sediment Pond(s) Plans and Calculations

NOT APPLICABLE

Attachment I

Inspection and Maintenance for BMPs

The BMPs for the construction of this project shall be the use of rock berms and silt fencing. The following inspection and maintenance procedures shall be implemented:

1. Stabilized Construction Entrance/Exit, Silt fencing and rock berms must be in place prior to the start of construction and shall remain in place until construction has been complete and the site stabilized from further erosion.

2. The contractor shall inspect the rock berms and silt fencing at least once a week and within 24 hours of a storm of 0.5 inches or more in depth. The contractor shall repair or replace any damaged TBMPs. The contractor shall correct damage or deficiencies as soon as practical after the inspection but no later than 7 days after the inspection.

a. Rock Berms:

1. Contractor shall remove sediment and other debris when buildup reaches 6 inches and dispose of the accumulated silt in an approval manner that shall not cause any additional siltation.

2. The berm should be replaced when the structures ceases to function as intended due to silt accumulation among the rocks, washout, construction traffic damage, etc.

3. Inspection should be made weekly and after each rainfall by the responsible party.

4. For installations in streambeds, additional daily inspections should be made.

5. Repair any loose wire sheathing

6. The berm should be reshaped as needed during inspection

7. The rock berm should be left in place until all upstream areas are stabilized and accumulated silt removed.

b. Temporary Construction Entrance/Exit:

1. All sediment spilled, dropped, washed or tracked onto public right-of-way should be removed immediately by contractor.

2. When necessary, wheels should be cleaned to remove sediment prior to entrance onto right-of-way.

3. When washing is required, it should be done on an area stabilized with crushed stone that drains into an approved sediment trap or sediment basin.

4. The entrance should be maintained in a condition, which shall prevent tracking or flowing of sediment onto public rights-of-way. This may require periodic top dressing with additional stone as conditions demand and repair and/or cleanout of any measures used to trap sediments.

5. All sediment should be prevented from entering any storm drain, ditch or water course by using approved methods.

c. For Silt Fence:

1. Remove sediment when buildup reaches 6 inches.

2. When construction is complete, the sediment should be disposed of in a manner that shall not cause additional siltation and the prior location if the silt fence should be revegetated. The fence itself should be disposed of in an approved landfill.

3. Inspect all fencing weekly and after any rainfall

4. Replace any torn fabric or install a second line of fencing parallel to the torn section

5. Replace or repair any sections crushed or collapsed in the course of construction activity. If a section of fence is obstructing vehicular access, consider relocating it to a spot where it shall provide equal protection, but shall not obstruct vehicles. A triangular filter dike may be preferable to a silt fence at common vehicle access points.

3. Contractor shall place trench excavation on the upgradient side of the trench.

4. All soil, sand, gravel, and excavated material stockpiled on-site shall have appropriately sized silt fencing placed upgradient and down gradient.

5. The contractor shall keep a record of the weekly inspections, noting the condition of the rock berms, silt fencing and construction entrance and any corrective action taken to maintain the erosion control structures. In addition to the inspection and maintenance reports, the operator should keep records of the construction activity on-site, in particular, the following information should be kept.

a. The dates when major grading activities occur in a particular area.

b. The dates when construction activities cease in an area, temporarily or permanently.

c. The dates when an area is stabilized, temporarily or permanently.

d. Records to be maintained in SWPPP.

Attachment J

Schedule of Interim and Permanent Soil Stabilization Practices

The schedule of interim and permanent soil stabilization shall be as follows:

1. Once construction of the project has commenced, the construction activity is planned to continue until the project is complete. The water, electrical, cable TV and telephone trenches shall be excavated. The trenches shall then be re-excavated and the water, electrical, cable TV and telephone lines shall be installed. This work is intended to continue until all the lines are installed. The utility lines are located within the project boundaries as shown on the site plan.

As soon as the underground utilities are installed, the road base shall be installed and compacted providing the interim soil stabilization for the paved area and the permanent soil stabilization for the parking areas. Once the individual residential buildings are built and landscaped this shall provide permanent soil stabilization for the building areas.

2. Much of the excavation for this project shall be in solid rock, helping to minimize the amount of loose soil which has the potential to become suspended in runoff and washed downstream.

3. Stabilization measures shall be initiated as soon as practicable in portions of the site where construction activities have temporarily or permanently ceased, but in no case more than 14 days after the construction activity in that portion of the site has temporary or permanently ceased. Where the initiation of stabilization measures by the 14th day after construction activity temporary or permanently cease in precluded by weather conditions, stabilization measures shall be initiated as soon as practicable. Where construction activity on a portion of the site is temporarily ceased, and earth disturbing activities shall be resumed within 21 days, temporary stabilization measures do not have to be initiated on that portion of site. In areas experiencing droughts where the initiation of stabilization measures by the 14th day after construction activity has temporarily or permanently ceased is precluded by seasonal arid conditions, stabilization measures shall be initiated as soon as practicable.