City of Fresno Dept. of Public Works25-18A9 May 2024
n) Valve Boxes: Carston Industries, Brooks or approved equal, valve boxes shall be set to finished grade.1. Remote control valves shall be connected and aligned to provide the most efficient flow of water to the irrigation heads. Each valve is to be enclosed in the specified valve box. The valve box shall be secured on firm soil clear of valves and wiring connections. 2. Backfill carefully to prevent settlement and subsequent damage. Each valve box comer is to be set on a brick to prevent settling, with a minimum of 0.3 m³ (one cubic foot) of pea gravel installed below the valve. o) Remote Control Valves: Remote control valves shall be adjusted so that all heads operate within the pressure range recommended by the head manufacturer. Remote control valves shall be adjusted so a uniform distribution of water is applied by the heads to the planting areas for each individual valve system. Make all connections for operation. p) Flushing of Lines: After all new piping is in place and connected, and all necessary diversion Work has been completed, the control valves shall be opened and a full head of water used to flush out the system. q) Pressure Test: The Contractor shall notify all necessary parties 48 hours prior to pressure testing. 1. The Contractor is to center load pipe with small amounts of backfill to prevent arching or slipping of pipe under pressure.2. All solvent welded pipe joints shall be allowed to set at least 24 hours before any pressure testing can be performed. 3. All pressure lines shall be tested under hydrostatic pressure of (125psi) after installation. The Contractor shall provide all equipment for such tests.Pressure tests will not be required for non pressure lateral lines with swing joints.4. Pressure shall be sustained in the lines for not less than four (4) hours. If leaks develop, the joints shall be replaced and the tests repeated until the entire system is proven watertight. 5. Tests shall be observed and approved by the City inspector prior to backfill.If irrigation lines are plowed into place, all pipe joints are to be exposed for the pressure test. 6. Upon completion of each phase of the Work, the Contractor shall check and adjust each sprinkler head to meet the Site requirements and Plan.
City of Fresno Dept. of Public Works25-19A9 May 2024
r) Automatic Controllers: Locate controllers in general locations shown, with exact placement to be determined at the Site by the City’s representative.1. Connect to 120 volt source(s) provided at the Site. Install electrical service pedestal at the connection. 2. Use rigid metal conduit above grade, slab, or floor.3. Provide and install rechargeable battery backup in controllers per manufacturer’s recommendations.4. Connect control wires to controllers in sequential arrangement according to assigned identification numbers on Plans. 5. Controllers shall be properly grounded per the National Electric Code and conform to local regulations. 6. Controllers shall be programmed so as not to apply excess water. Care shall be taken to prevent runoff and slope/soil erosion caused by prolonged applications of water. NOTE: CONTRACTOR WILL BE CITED AND FINED FOR WATER WASTE IN ACCORDANCE WITH THE CITY OF FRESNO MUNICIPAL CODE. 7. Solar and battery powered controllers shall be installed per manufacturer’s recommendation and as directed by the City inspector. s) Automatic Controller Schedule: Install automatic controller schedule in laminated plastic or a watertight plastic envelope inside controller cover showing which valves are connected to which stations on controller. t) Controller Charts: The Contractor shall provide one controller chart for each controller supplied.1. The chart shall show the area controlled by automatic controller and shall be the maximum size controller door will allow. 2. The chart may be a reduced drawing of the actual “As-Built” system.However, in the event the controller sequence is not legible when the drawing is reduced, it shall be enlarged to a size that will be legible when reduced.u) Electrical and Lighting Systems: The Contractor shall be responsible for providing an electrical service in a service panel approved by the Engineer.
City of Fresno Dept. of Public Works25-20A9 May 2024
Power will be provided to the irrigation controller, booster pump (if required), lighting system, or any other electrical component as described on the Plans.All circuits will be identified at the service panel. 1. All electrical work shall conform to local codes, ordinances, and regulations.2. Wires shall not be taped together inside conduits.3. Lighting systems installed as a component of a landscape design shall conform to all design and materials Specifications on the Plans. 4. Unless otherwise noted on the Plans, security lights along roadways, alleys, walkways, and in parking areas are to be controlled by a single photocell, which is to be installed at the control panel and according to manufacturer’s recommendations. For most installations, the photocell shall be installed facing north. 5. For maintenance purposes, a test switch that bypasses the photo cell is to be installed in the control panel. The switch is to be identified as the “test.”All lighting is to be installed using both time clock and photo cell controls. In larger parks, the security lighting system may be split, having some lights controlled strictly by photo cell and some by time clock/photo cell.Installation shall follow the Plans for the specific system design Specifications. 6. Ornamental or landscape lighting (including low voltage systems) shall be installed using a time clock/photocell control. These lights are required to have relay switches that are separate from the security lighting system. 7. Electrical outlets located at picnic areas or at the base of light poles are to be “hot” at all times. No more than two double-outlet receptacles are to be on a single 30-amp circuit. 8. Each of the above, as well as any other components of electrical/lighting system are to have individual, labeled circuit breakers (i.e., irrigation controller is not to share a breaker with security lighting). v) Sprinkler Heads: Sprinkler heads located in areas where ground cover planting is indicated shall be set on permanent risers with top of head located above finished grade per detail, rotary pop-up sprinkler heads adjacent to walks or roads shall be set 15cm (6") from edge of walk or road, and pop-up spray heads adjacent to walks or roads shall be set 5cm (2") from edge of walk or roads.1. Upon completion of the installation, the Contractor shall adjust sprinkler heads to properly distribute water flow and shall place entire irrigation system in correct operating condition.
City of Fresno Dept. of Public Works25-21A9 May 2024
2. Adjust sprinkler heads that spray toward fences or walls so that water spray does not contact side of buildings. w) Emitters: Upon completion of the installation, the Contractor shall adjust the drip emitters to properly distribute water flow and shall place entire irrigation system in correct operating condition. x) Cathodic (Insulation) Protection: Protection shall be installed as follows:1. Between wrapped galvanized steel pipe and unwrapped galvanized steel or cast-iron pipe in ground using couplings or flanges. 2. Between pipes and equipment, except at sprinkler heads and backflow preventer. 3. Between old and new steel piping.4. Wherever brass, copper, or bronze is installed in contact with or adjacent to steel buried in the ground, and also at insulated fittings, junction shall be wrapped with minimum of two overlapping layers of specified tape. Tape shall follow the contours of the junction and extend 15cm (6") or more over the steel and over the brass fittings or valve as far as practical. 5. Galvanized steel pipe under a concrete slab. y) Concrete Equipment Pads: Concrete pads will be provided for all irrigation and electrical equipment in a location approved by the City inspector. All pads will be installed at finished grade and will be a minimum of 6” thick. All pads shall be installed with the slab extending 1.27cm (½”) above finish grade. All pads shall be sloped to drain to matching drainage patters at 0.635cm per 0.3m (1/4" per foot). Unless otherwise directed by the City inspector, the installer will locate the irrigation controller, backflow preventer, and electrical service panel on a common pad. 25-3.3 Backfill and Compaction a) Backfill shall not be placed until the installed system has been inspected and approved by the City. 1. Backfill material shall be approved soil. Unsuitable material, such as pipe remnants, wire, clods and rocks over 5cm (2") in size, shall be removed from the premises and disposed of legally. Backfill for the first 15cm (6") around the mainline pipe and control wires shall be native soil.2. All backfilling shall be done carefully and shall be properly tamped. All soil shall be tamped and jetted to eliminate any voids.
City of Fresno Dept. of Public Works25-22A9 May 2024
3. Surplus earth remaining after backfilling shall be disposed of as directed by the City inspector. 4. Backfilling for all pipe shall be carried out in two basic stages: i. Stage One – Backfilling: This shall be accomplished as soon as possible after the pipe is laid. A bedding of uniform depth with no voids must be provided along the entire length of the pipe. The bedding dirt shall be placed in the trench and tamped into the areas under the pipe, using a suitable tool. Joints shall be left exposed until hydrostatic tests are completed. Cover only those portions of the pipe necessary to prevent movement or damage. ii. Stage Two – Backfilling: This shall be completed after all hydrostatic tests are completed and the piping system has been thoroughly checked for leaks or other defects. Continue to add backfill soil in 10cm (4") layers and hand tamp to achieve a density similar to adjacent soil. After 30cm (12") in main line trenches of hand-tamped soil is in place over the pipe and fittings, backfilling can be continued, using light machinery to place dirt in the trenches in 15cm (6") layers and to compact the dirt to conform to adjacent soil. Extreme care shall be taken to avoid damage to the pipe from machinery that is too heavy. All trenches shall be water-jetted to assure uniform settling and compaction. Backfilling operations will not be considered complete until the top surface has been graded to conform to the adjacent soil. All rocks must be collected and removed from the Site.5. PVC piping and fittings shall not be backfilled during periods of extreme heat or when a sudden lowering of the temperature of the pipe may cause separation of joints or fittings. 25-4 PART 4 INSPECTION AND TESTS 25-4.1 Periodic Inspections a) Periodic inspections shall be required for basic operations and installations during progression of the project. It shall be the Contractor’s obligation to call and schedule inspections. Such inspections will include but not necessarily be limited to the following items: 1. Grading 2. Layout and flagging of sprinkler heads and system 3. Trenching City of Fresno Dept. of Public Works25-23A9 May 2024
4. Pipe and wire placement 5. Partial fill compaction 6. Control valve installation 7. Electrical panel installation 8. Irrigation controller installation and operation 9. Mainline sustained pressure deck 10. booster pump installation 11. Backflow preventer installation 12. Water service installation and meter connection b) All overtime inspection charges incurred by City personnel shall be paid by the Contractor when inspection services are required outside of normal working hours. Work requiring inspection before or after the normal 8 hours of a normal working day or taking place on holidays, Saturdays and Sundays will be considered overtime inspection. c) A final inspection of the Work shall be made by the City inspector and City Parks Department Representative in the presence of the Contractor, at the time when all landscaping and irrigation Work is completed. The Contractor shall provide 48 hours notification in advance of such inspection. Prior to the final inspection, the Contractor shall have prepared and transmitted to the City a record set of “As-Built” Plans of the landscaping and irrigation Work. No final inspection will commence without the “As-Built” Plans. d) In the event that the Contractor schedules an inspection and has not completed the Work that is to be inspected or made an effort to do so, the Contractor will be billed for the cost of the inspection and must remit the cost prior to final approval and inspection of the Work 25-4.2 Testing and Adjustment a) PVC main lines (upstream of control valves) shall be tested under a gauge pressure of 125 pounds per square inch (psi), said pressure to be maintained for a period of not less than 2 hours. PVC lateral lines (downstream of control valves) shall be tested under a gauge pressure of 75 psi, and pressure to be maintained for a period of not less than one hour. Such tests shall be performed prior to final backfill. All leaks shall be repaired and all defective materials City of Fresno Dept. of Public Works25-24A9 May 2024
replaced to the satisfaction of the Engineer, and the testing and repairs repeated until the system is approved. b) Sprinkler heads in proposed turf areas shall be installed one inch above grade and lowered to finish grade after the lawn is established. Any damage to lawn caused by lowering of the heads shall be repaired by the Contractor to the Engineer’s satisfaction. c) After the installation of automatic controller, valves, sprinkler heads, drip emitters and other equipment, the complete system shall be operated in the presence of the Engineer. Any defective or inoperative material shall be repaired or replaced to the satisfaction of the Engineer. The Contractor shall balance and adjust the various components of the system so the overall operation of the system is most efficient. This includes a synchronization of the controllers, adjustments to heads and emitters, and individual station adjustments on the controllers. d) When the irrigation system is completed, the Contractor, in the presence of the Engineer, shall perform a test to check the coverage of the system. The Contractor shall inform the City of any deviation from the Plan required due to wind, planting, soil, or conditions that bear on proper coverage. e) The Contractor shall furnish all materials and labor required to correct any inadequacies of coverage due to Site conditions or unauthorized deviations from the Plans. If such corrections or additions are required in the sprinkler system, the Contractor shall make all adjustments and corrections without any extra cost to the City. 25-5 PART 5 MAINTENANCE AND CLOSE OUT 25-5.1 Maintenance a) A 90-Day maintenance period will be required for all irrigation systems. This maintenance period will run concurrently with the landscape planting maintenance period. The maintenance period shall begin after all landscape construction activities have been completed, and upon receiving written approval of the Work by the City. b) It is the Contractor’s responsibility to continuously maintain and provide all necessary repairs until a written Notice of final acceptance for maintenance is received from the City. The Contractor shall have the charge and care thereof and shall bear the risk of injury or damage to any part thereof by the action of the elements or from any other cause not the fault of the City. The Contractor shall rebuild, repair, restore, and make good all injuries or damages to any portion of the Work before final acceptance for maintenance.
City of Fresno Dept. of Public Works25-25A9 May 2024
25-5.2 Completion a) Upon completion of Work, the Contractor shall provide to the City: 1. Two additional keys to each enclosure and controller box. 2. Two each of any specialized tools required for the operation and/or maintenance of each type of component installed in the system. 3. Other items as specified in the Plans and Specifications. 25-5.3 System Guarantee a) The entire irrigation system shall be guaranteed by the Contractor to give satisfactory service, and the Contractor shall guarantee the quality of material, equipment, and workmanship, including settling of backfilled areas below finish grade, for a period of one year following the date of the filing of the Notice of Acceptance for all the Work by the City. b) If, within one year from the date of the filing of the Notice of Acceptance for all of the Work, problems develop resulting from inferior or faulty materials or workmanship, or settlement occurs requiring adjustments in pipes, valves, emitters, heads, sod, or paving to the proper level of the permanent grades, the Contractor, as part of the Work under his Contract, shall make all adjustments and corrections without extra cost to the City, including the complete restoration of damaged planting, paving, or other improvements of any kind. 25-5.4 Measurement Landscape irrigation systems will be measured by the lump sum for the entire system, complete in every detail.
City of Fresno Dept. of Public Works26-1A9 May 2024
SECTION 26 – PLANTING SPECIFICATIONS 26-1 PART ONE GENERAL 26-1.1 Scope of Work a) The Work includes the furnishing of all labor, materials, plants, seed, fertilizer, soil amendments, tools, equipment, transportation, and the performance of all Work required to prepare the soil and plant the lawns, together with maintenance of the planted lawns and cleaning up of the site, all as shown on the Plans, as specified in these Specifications, and as directed by the Engineer.b) Site Protection: The Contractor shall adequately protect the Site, and the Work, erecting barricades, construction fences, or other implementing other protective methods as needed for protection of the Site during both the construction and maintenance period. Replacement and/or repair of any materials, including the labor to effect the Work shall be completed at the Contractor’s sole cost at no additional cost to the City. The Contractor shall also protect the adjacent property, and the public, from operations or acts that may damage or harm either, and shall be responsible for any damage, injury or loss due to the Contractor's acts or negligence as determined by the City. 26-1.2 Testing and Inspection a) After rough grade is approved by the Engineer, the Contractor shall provide agronomic soils testing by a laboratory approved by the City for public landscape areas. The Contractor shall submit test results with soil amendment recommendation to the Engineer for review and approval. The Contractor shall amend soil, prepare backfill and fertilize per subsection 26-2.2 of these City Standard Specifications, unless soils test recommendation would cause an unhealthy growing environment. b) Soil depth in median island areas is to be determined by digging or drilling ½” diameter, 5' deep test holes at locations to be selected by the City inspector.Any asphalt, concrete, road base, or other debris that is encountered is to be removed and replaced with approved topsoil throughout the entire area to be planted.c) Planting Work shall be subject to special inspections by the Engineer including, but not necessarily limited to, the following items:1. Grading.2. Imported soil and soil amendments prior to incorporation into Work.3. Soil fumigations or weed control operations prior to planting.
City of Fresno Dept. of Public Works26-2A9 May 2024
4. Placement and arrangement of plant materials prior to planting. 5. Condition of plant material prior to placement.6. Digging and preparation of plant pits for trees.7. Planting and staking of trees. d) All overtime inspection charges incurred by City personnel shall be paid by the Contractor when inspection services are required outside of normal working hours. Work requiring inspection before or after the normal 8 hours of a normal working day or taking place on holidays Saturdays and Sundays will be considered overtime inspection. e) A final inspection of the Work shall be made by the City inspector and City Parks Department representative in the presence of the Contractor, at the time when all landscaping and irrigation Work is completed. The Contractor shall provide 48 hours notification in advance of such inspection. Prior to the final inspection, the Contractor shall have prepared and transmitted to the City a record set of "As-Built" drawings of the landscaping and irrigation Work. No final inspection will commence without the "As-Built" drawings of the landscaping and irrigation Work. No final inspection will commence without the "As-Built" drawings.f) In the event that the Contractor schedules an inspection and has not completed the Work that is to be inspected or made an effort to do so, the Contractor will be billed for the cost of the inspection and must remit the cost prior to final approval and inspection of the Work.26-2 PART TWO MATERIALS/EXECUTION26-2.1 Plant Material a) In all cases, materials shall be furnished as needed to complete Work in quantities designated on the construction Plans or these Specifications, including turf reseeding, redressing and maintenance during construction and the maintenance period. The Contractor shall provide upon request valid invoices to verify amounts of various materials to be used. b) All plant material shall conform to the requirements of Title 3 (Food and Agriculture) of the California Code of Regulations and these Specifications. All plant material shall be grown in nurseries that have been inspected by the State Department of Food and Agriculture and have complied with its regulations.
City of Fresno Dept. of Public Works26-3A9 May 2024
c) Plant nomenclature shall be defined by the list of plant materials on the Landscape Planting Plan. All trees, shrubs, and other plants shall be the variety and size shown on the Plans and shall conform to the requirements herein. All trees, shrubs, and other plants shall be tagged with their botanical and common plant name in accordance with recommendations of the American Nursery and Landscape Association.d) Substitutions for the indicated plant material will be permitted, provided the substitute materials are approved in advance by the Engineer, and the substitutions are made at no additional cost. All substitute plant material shall conform to the requirements of these Specifications unless otherwise approved by the Engineer. e) All plant material shall be symmetrical, typical for variety and species, sound, healthy, vigorous, free from plant disease, insect pests or their eggs, mechanical injury, excessive abrasions, or other objectionable disfigurements, and shall have healthy, normal root systems, well filling their containers, but not to the point of being root bound. All plant material shall have a habit of growth that is normal to the species, and be sound, healthy, and vigorous. Tree trunks shall be sturdy and well hardened off. Trees and shrubs shall not be pruned prior to delivery except as authorized by the City. In no case shall trees or shrubs be topped. f) All plant material shall have normally well-developed branch systems with straight stems, well balanced tops of vigorous growth and vigorous and fibrous root systems which are not root bound. Root condition of plants will be determined by the City removal of earth from the roots of at least two (2) plants but not more than 2% of the total number of species or variety from each source. 26-2.2 Grading and Soil Preparation a) Before soil preparation is to begin, the entire area that is to be planted shall be finish graded to lines and grades established by the Engineer or as indicated in the construction Plans and Specifications. Filled area shall be sufficiently compacted to prevent settlement when watered. Areas to be cut, or to receive fill, shall have the topsoil stripped and stockpiled before the grading operations begin. After completion of the grading operations, the topsoil is to be replaced in planted areas (lawn and planters). Topsoil stripped from areas to be paved is to be stockpiled and replaced in planted areas. The Contractor is responsible to remove excess soil from the Site, or import additional topsoil -if needed, at no cost to the City. 1. Top soil: Shall be fertile, friable, natural loam, free of subsoil, clay lumps, brush, weeds and other litter, roots, stumps, stones larger than 1" in any dimension, and other extraneous or toxic matter harmful to plant growth.
City of Fresno Dept. of Public Works26-4A9 May 2024
Contractor shall submit a soils analysis of the proposed top soil (see subsection 26-1.2) to be imported for the Work for review and acceptance by the City before delivery to the Site.2. Fill soil: Upon approval by the City, soil from the Site, free of subsoil, clay lumps, brush, weeds and other litter, roots, stumps, stones larger than 1" in any dimension, and other extraneous or toxic matter harmful to plant growth may be used as fill soil in the project landscape areas. Contractor shall compact all landscape fills to a maximum of 85% after grading, in areas designated for planting only. All other areas shall be compacted per structural requirements of the paving or facility. Top soil, as described in subsection 26-2.2 of these City Standard Specifications, may also be used as fill soil at the Contractor's option. Imported fill soil shall be pre-tested and approved by the City as described above. 3. Placement of topsoil and fill soil: i. Topsoil (if required to be imported for the job): Minimum depth in lawn areas shall be an even depth of six inches deep in all landscape areas to be turfed. ii. All other landscape areas: May be graded and built up with fill soil (or topsoil at the Contractor's option) as needed to achieve proper grades and lines as denoted on the project grading Plans. iii. Landscape mounds and berms: If called for, may be formed with fill soil or topsoil as described in this subsections. b) The soil shall not be worked when the moisture content is so great that excessive compaction will occur, nor when it is so dry that dust will form in the air or that clods will not break readily. Water shall be applied if necessary, to provide ideal moisture for filling and for planting as herein specified. c) All areas specified for planting shall be ripped to a depth of at least 20 cm (8")so the soil is loose and friable. d) In turf areas, the top 7.5 cm (3") of the surface soil shall be cleared of all concrete, stones, roots and similar objects larger than 2.5 cm. (1") in length, wire, sticks and other foreign material. Areas to be seeded shall be evenly graded to present a smooth and even surface free of humps and hollows.Immediately prior to seeding, the surface of the area to be planted shall be sufficiently loose and friable to receive the seed.e) The Contractor shall legally dispose of all debris.
City of Fresno Dept. of Public Works26-5A9 May 2024
f) Soil Amendment: Shall be a mixture of humus, wood fibers, organics and a maximum of 50% digested, centrifuged biosolids capable of passing through a 3/8" screen, Earthwise Organics’ AGRI-YIELD, Kellogg’s Nitro Humas or approved equal. Amendment shall be licensed with the State Department of Food and Agriculture and shall be certified as an organic compound under the California Organics Food Act of 1990 and shall be defined as a Class A material as defined by the United States Environmental Protection Agency, 40 CFR 503. Contractor shall submit laboratory analysis for review and approval by the City before delivering any material proposed as "Amendment" to the Site. g) Soil amendments: Soil amendments shall be evenly spread and incorporated into all areas designated for planting at the following rates: 1. 4.5 cubic yards (CY) per 1,000 SF which will result in a nominal soil amendment depth of 1 ½ “, over all areas designated for the planting of ornamental ground covers, shrubs, trees, and turf (see Plans). 2. Spread fertilizer and other macro/micro-nutrients over all planting areas designated for planting along with the amendment (where applicable) and incorporate into the soil during the tilling process. h) Tilling and Incorporation of Amendments: Amendment and fertilizer shall be thoroughly tilled into the soil by rototilling, discing, or other means to a minimum depth of eight (8) inches. This tilling/incorporation process shall be completed separately and after the soil ripping process, and after all major Site Work has been completed in order to minimize further compaction of the planting areas. i) Fertilizer application requirements during construction: The following fertilizers, micronutrients, and other additives shall be applied by the Contractor to the soil. 1. 6 lbs. of actual/elemental Ammonium based Nitrogen (percentage by weight) per 1,000 square feet (261 lbs./acre) shall be applied to the surface of all landscape planters after completion of the planting operations if the Nitrogen source is of a dry granular variety. 2. In the hydraulically seeded areas of the lawn, the Nitrogen shall be applied during the seeding operations as a highly concentrated liquid Nitrogen with a guaranteed analysis of 30-0-0 labeled as Monterey Chemical’s Monterey N-SLO 30, Hydro Agri’s UREA or approved equal. The concentrated liquid nitrogen shall be formulated of 4.5% Urea Nitrogen, and 25.5% water soluble Methylene Urea (Salt Index = 0%) with a minimum formulation of 3.1 lbs. of Nitrogen per gallon of liquid N-SLO 30. N-SLO 30 shall be applied at a rate of 2 gallons per 1,000 SF (87 gallons per acre).
City of Fresno Dept. of Public Works26-6A9 May 2024
3. 1 lb. of elemental/actual Phosphorus (percentage by weight) per 1,000 square feet shall be broadcast onto the soil amendment (afterthe amendment is spread throughout the planters) and tilled into the earth during the ground preparation operations. Phosphorus in the form of P2O5 will not be accepted for use on the Site.4. 1 lb. of elemental/actual Potassium (percentage by weight) per 1,000 square feet shall be broadcast onto the soil amendment (after the amendment is spread throughout the planters) and tilled into the earth during the ground preparation operations. Potassium in the form of muriate of potash (K Cl) will not be acceptable for use on the Site. 5. Additional micronutrients may be specified by the City after the rough grading operations are completed. Any additional applications of chemicals will be contracted by the City in writing as additional work. 6. The fertilizers, micronutrients, and other additives (excluding the application of nitrogen as described above) shall be incorporated into the soil at the time of incorporation of the soil amendment. Nitrogen shall be surface applied at the conclusion of the planting operations or during the hydraulic seeding process. 7. Some of the planter areas are irrigated with Sub-surface drip irrigation (SDI), and no automatic overhead irrigation is available in these locations.These areas, irrigated with SDI shall be hand irrigated one time in order to move the nitrogen into the soil. The Contractor shall thoroughly saturate the soil so that the water visibly stands on the surface without washing the seed and soil out onto the adjacent pavement. j) The Contractor shall finish grade all planting areas below the surfaces of all adjacent walks, curbs, mow strips, paved areas, etc., to the depth specified below, in all cases without abrupt changes in gradient: 1. Turf Areas: 15 mm (½) 2. Tree Shrubs: 40 mm (1 ½”) 3. Shrub and Ground Cover: 25 mm (1”) 26-2.3 Weed Control a) The Contractor shall notify the City of site conditions prior to planting. All existing weeds shall be removed and/or eradicated as determined by a licensed Pest Control Advisor (PCA) in writing. The Contractor shall verify the method of weed control employed whether by fumigation, chemical methods, mechanical methods or others as determined by a licensed PCA in writing. The City of Fresno Dept. of Public Works26-7A9 May 2024
Contractor shall use and apply weed control materials in accordance with manufacturers' recommendations and all local codes and ordinances. The materials shall be applied by a licensed applicator.b) The Contractor shall consistently use recommended weed control methods throughout the construction period. The Contractor will not allow weeds to become established or persist in any portion of the project. c) Prior to beginning the 90-Day maintenance period, the Contractor shall apply pre-emergent herbicide at the recommended rate on all non-turf areas. The City may require an application of pre-emergent herbicide to turf areas if it is determined to be necessary.26-2.4 Planting a) Seeding/Planting shall not commence until all construction Work, clearing and grubbing, grading soil preparation and irrigation system installation is complete.In addition, the functioning irrigation/sprinkler system shall be connected to a permanently installed City water meter prior to any seeding/planting Work.b) No planting activities are to proceed until the irrigation system is 100% complete and approved by the City.c) Planting pits shall be dug as required for the individual plant. No plant material shall be planted if the root ball is broken or cracked either before or during the process of planting. Once set, the root ball shall be scored to a depth of 2.5 cm (1") to prevent circling roots.d) Plants shall be set so that each plant shall bear the same relation to soil level when planted as it did when in container. Generally, trees and shrubs shall be set with the top of the root ball approximately 2.5 cm (1") above the finish grade.Each plant shall be placed in the center of the plant pit.Each plant pit shall be backfilled with the following prepared soil mix: 1. 50% clean native soil.2. 50% Agri-yield or approved equal. 3. Agriform plant tabs, or approved equal. e) Backfill material in planting pits shall be tamped firm and a shallow basin formed around the plant to hold enough water to saturate the root ball and backfill. Water plants immediately after planting.
City of Fresno Dept. of Public Works26-8 A9 May 2024
f) After plants are set and backfilled, area shall receive mulch as a top dressing as required for the individual plant. Mulch shall be "Walk-on-Bark." 26-2.5 Turf a) Lawn Seed Mixture Seed shall be of the quality and mixture specified. Before packaging, the seeds shall be mixed together in a mechanical mixer to obtain thorough dispersion of the various types of seeds. Date on certification tag shall be within five (5) months of the planting date. b) Two lawn seed mixtures shall be used (determined by planting season) and are designated as Winter Mix and Summer Mix. c) Winter Mix with percentages and weights: FP&R #1 shall be designated as a "winter" mix and shall be used when the seeding is done between September 15 through April 1.Seeding rate shall be 12 lbs./1,000 SF (523 lbs./acre). Percentages by weight shall be: 1. Pinnacle Perennial Ryegrass: 35% (4.25 lbs./1,000 SF) 2. Creeping Red Fescue: 35% (4.25 lbs./1,000 SF) 3. Cheyene Bermuda Grass: 30% (3.50 lbs./1,000 SF) In addition, the Contractor shall provide the City with the equivalent of 0.001 kg/m² (2 lbs./1000 sq. ft.) "Yuma" Bermuda grass for over-seeding during summer months. Should the maintenance period extend into the summer season, the Contractor shall be required to plant Bermuda grass in accordance with the following seeding rate for Summer Mix. d) Summer Mix with percentages by weights: FP&R #2 shall be designated as a "summer" mix and shall be used when the seeding is done between April 1 through September 15. Seeding rate shall be 12 lbs./1,000 SF (523 lbs./acre). Percentages by weight shall be: 1. Pinnacle Perennial Ryegrass: 20% (2.4 lbs./1,000 SF) 2. Cheyene Bermuda Grass: 80% (9.6 lbs./1,000 SF) e) The above percentages do not include crop seed, inert matter, etc. All seed shall be delivered to the Work Site in sealed containers with the vendor's tag of City of Fresno Dept. of Public Works26-9A9 May 2024
certification attached to each container. These shall remain attached to the containers and no seed shall be planted, except in the presence or at the direction of the Engineer. The Engineer reserves the right to take samples from each container for testing to verify certification and conformance with the State Seed law and regulations.f) The Contractor shall notify the City of Fresno prior to the application or reapplication of the seed.26-2.6 Turf Fertilizer a) Commercial fertilizer shall be added evenly to the soil at a rate per thousand square feet to apply approximately 0.45kg (1 lb) of actual nitrogen. The Contractor shall apply fertilizer a minimum of two times. The first fertilization is to occur within 7 Days of the first mowing. The second will occur 60 Days thereafter. The commercial fertilizer shall be homogenous pellet form of a long lasting type of turf fertilizer consisting of both ammoniac and organic nitrogen, phosphorus, potassium (potash), sulfur, and minor elements of iron, zinc, and manganese. b) The commercial fertilizer shall be Granulated (14-7-33), with an application rate of 0.04 kg/m2 (8 lbs. per 1,000 sq. ft).Ammoniac Nitrogen 4.00%Organic Nitrogen 10.00% Total Nitrogen 14.00% Available Phosphoric Acid 7.00%Soluble Potash 3.00%Sulfur 7.00%Iron 1.60%Zinc 0.15%Manganese 0.15%26-2.7 Planting Turf Seed a) Hydroseeding is the preferred method for planting turf seed. b) Hydraulic equipment used for the application of the fertilizer seed and slurry of prepared wood mulch shall be of the "Super Hydro-seeded" type. The equipment shall have a built-in agitation system and operating capacity sufficient to agitate, suspend and homogeneously mix a slurry.Application rate for hydro-mulching is as follows:Wood Mulch 0.2 kg/m² = 40 lbs./1,000 sq. ft.Long Lasting Fertilizer (14-7-3) 0.05 kg/m² = 10 lbs./1,000 sq. ft.
City of Fresno Dept. of Public Works26-10A9 May 2024
Seed Mixture (Summer Mix)(Winter Mix) 0.1 kg/m² = 20 lbs./1,000 sq. ft.0.2 0.04 kg/m² = 8 lbs./1,000 sq. ft. Mulch Binder (Mulch Tackifier) 0.01 kg/m² = 2 lbs./1,000 sq. ft. c) For some projects, direct sowing of turf seed may be approved by the City. In these instances, the soil is to be moistened prior to seeding. The turf seed will be distributed in an even, uniform manner. Combinations of turf seed varieties will be prepared and evenly mixed prior to the application of the seed. The seed will be planted using a mechanical seeder such as a "Brillion" drill or a Culti-Pack type device. Broadcast-type equipment may be used only for over seeding in established turf areas. d) The seed beds shall be kept continually moist after turf seed planting. The time interval between "water off' and "water on" irrigation is to be governed strictly by the amount of surface moisture. 26-2.8 Planting Sod a) Turf areas may be planted by the installation of sod when approved by the City. The variety of sod will be a premium quality, dwarf turf-type tall fescue. The variety of sod is to be submitted to the City in writing for approval. b) Procedure for installation of Sod will be as follows: 1. Sod must be installed within 8 hours of delivery to the Site. Protect stored or unused sod from damage by heat, sunlight, or any other adverse condition.2. Handle sod with care. Torn pieces must have ends cut straight. Pieces smaller than 61 cm (24") in length are to be used only for patching or repairs.3. Lay sod evenly in a staggered pattern of strips, so that the roll ends are consistently at different locations. Lay and fit sod so that all end joints and cuts are free of voids. Sod will be flush with finished grade of adjacent walkways, curbs or other hardscaped areas. 4. Tamp each roll into position against adjacent strips to eliminate gaps, openings or uneven joints.5. Trim sod to conform to turf area shapes. Expose all sprinklers and valve boxes. Provide a clean straight edge. 6. Roll all sod areas immediately after installation to remove air pockets and provide complete contact between sod and soil.
City of Fresno Dept. of Public Works26-11A9 May 2024
7. After installation, irrigate sod completely to provide optimum moisture throughout the period of establishment.26-2.9 Watering a) After approval of the turf planting operations by the City, the Contractor shall, without flooding, maintain moisture in all planted areas. The areas shall not be watered to the extent of saturating the soil and causing seed "flotation" or "flowing" of the top surface of the soil. After water has once been applied, no portion of the seeded areas shall be allowed to dry out during the entire germination period. The Contractor shall be responsible to alter the watering times and frequencies to meet Site conditions. Irrigate sod thoroughly, so that moisture penetrates through the sod into the soil. Use of a penetrating agent is advised. 26-2.10 Turf Grass Establishment Period a) The turf grass establishment period begins with the first mowing. The first mowing shall not commence until the grass is generally at least 5 cm (2"), but less than 7.5 cm (3") high. For the second mowing and all subsequent mowings, the mower shall be set to cut at the height of 3.9 cm (1-1/2").b) Between the fifteenth (15th) Day and the twentieth (20th) Day of the establishment period, the Contractor shall reseed the spots or areas in which normal germination of the seed is not evident. At the end of thirty (30) Days of the establishment period, the Contractor shall do the following: 1. Reseed all spots or areas where normal seed germination is not evident;2. Remove all rocks or other debris that would constitute a hindrance to subsequent mowings; 3. Repair all damage done by his/her operations; 4. Fill all depressions and eroded channels with sufficient topsoil to raise to the proper grade, compact lightly and reseed the filled areas; and 5. Roll all seeded and reseeded areas with a 58 kg (125 lb.) weight roller to firm the soil around the grass roots and to provide a smooth and even mowing surface. Following the thirtieth (30th) Day and the ninetieth (90) Day of the establishment period, the lawn shall be maintained by mowing at least once every seven (7) Days. Maintenance shall also include repairing and reseeding damaged areas, as directed by the Engineer. Upon satisfactory completion of the above points, reseeded areas will be accepted by the Engineer provided all City of Fresno Dept. of Public Works26-12A9 May 2024
other provisions of these Specifications have been complied with by the Contractor. Turf shall be maintained in a weed free condition. Weeds in turf areas will be removed and/or eradicated as recommended by a licensed Pest Control Advisor (PCA) in writing. The turf grass establishment period may overlap with the 90-Day maintenance period.26-2.11 Trees a) (15 gallon) Tree Standard Trees shall be at least 2.0 cm (3/4") in diameter, measured 15 cm (6") from the container soil level. Tree height shall be at least 1.82 m (6') measured from the container soil level. b) When trees are spaced in rows, the total dimension shall be verified and the trees equally spaced within the designated area. Where trees are shown in an informal pattern, the Contractor shall space the material as shown maintaining an unequal spacing as shown on the Plans and as directed by the Engineer. c) The Contractor is to ensure that the spacing of trees conforms with the following minimum spacing guidelines. Trees shall be planted: 1. 10 m (30') from Street corners and stop signs. 2. 5 m (15') from alleys. 3. 3 m (10') from driveways. 4. 6 m (20') from light poles. 5. 5 m (15') from power poles. 6. 3 m (10') from fire hydrants. 7. 2 m (6') from concrete improvements, unless otherwise shown on the Plans. 8. 2.5 m (8') from Sewer lines. 9. 1 m (3') from gas and electrical lines. 10. 1 m (3') from water lines. 11. 1 m (3') from telephone and cable television lines. 12. 6 m (20') from other acceptable trees.
City of Fresno Dept. of Public Works26-13A9 May 2024
13. 1 m (3') from adjoining property line.d) When tree spacing conflicts with the above guidelines, the Contractor is to recommend alternate locations, and contact the Engineer for a ruling.e) As designated on the Plans. If not designated on the Plans, and reference is made to these Specifications, root barriers shall be manufactured by DeepRoot, Century Products, or approved equal. Linear root barriers shall be a minimum of 12 inches deep. If located in City parkway strip or parking lot planting islands, the barriers shall be placed on each side of the tree, one section against the back of curb, and one section against the front of the sidewalk. In planting islands, the barrier shall completely encircle the island.The necessary length shall be per the As-Built conditions in the field. A single drainage hole shall be punched into the barrier to accommodate the drainage hole(s) in the parking lot islands as depicted on the Plans. At a minimum, the root barriers shall be constructed of sections of ribbed plastic or polyurethane material. Ribbed portion shall be facing toward the tree roots. Both round and linear root barriers shall be placed at the same finish grade as the adjacent paving surface, or if no pavement finish grade is evident, place top of root barrier panel one (1) inch above finish grade. Provide manufacturer standard as LB 12-2: root barrier up against the sidewalks, mow strips and slabs and other similar type of hardscape applications. 26-2.12 Drainage Holes and Backfilling for Trees a) Subsurface soil and conditions may require drainage holes for proper tree development as determined by the Engineer. The Contractor shall provide the required drainage hold by means of drilling as specified herein. A minimum waiting period of twenty (20) Days after drilling shall be completed before any planting can begin. (The Contractor will be responsible for locating all underground Utilities.) 26-2.13 Requirements for Drilling a) One (1) drainage hole, minimum diameter of 60 cm (24"), shall be drilled for each tree to be planted as designated on the Plans. b) The depth of the drainage hole shall be determined as follows: 1. The hole must penetrate through and beyond any underlying paving material or hardpan soil stratum. All paving material shall be removed from the drilled hole. 2. The hole shall be drilled to a depth where visual evidence of the subsurface sand or gravel drainage stratum is apparent.
City of Fresno Dept. of Public Works26-14A9 May 2024
3. If there is no apparent drainage stratum, the drainage hole shall be drilled to a minimum of 3 m (10') deep. c) After drilling is completed, native soil is to be backfilled in lifts into the hole using the following procedure: 1. Replace 60 cm (24") of soil.2. Thoroughly saturate the backfill with water. Continue this process until the backfill is complete.26-2.14 Tree Pits a) Tree pits shall be dug with level bottoms, width twice the diameter of the root ball and 30cm (12") deeper than length of root ball for deciduous and broadleaf trees and coniferous trees. 26-2.15 Tree Fertilizer a) During the planting operation, apply (21 gram 20-10-5) Agriform or Best-Tabs planting tablets or approved equal, as follows: 1. Position the plant in the hole and backfill halfway up the root ball.2. Place the recommended number of tablets evenly around the perimeter of, and immediately adjacent to, the root ball at a depth which is between the middle and the bottom of the root ball. Completely backfill, tamp firm the soil, and water. 3. Apply Agriform Plant Tablets or approved equal as follows: (1 gallon) container plants: 1 tablet (5 gallon) container plants: 3 tablets (15 gallon) container plants: 6 tablets (24") box container plants: 10 tablets 26-2.16 Tree Staking a) Stake coniferous evergreen trees with 1 Lodge Pole Pine specified stake on the NW (windward) side of the tree. Stake deciduous and broadleaf trees with 2 Lodge pole pine stakes, 1 NE and 1 SW (perpendicular to the wind) from the tree. Stakes shall be vertical, approximately 0.3 m (12") from the tree, and at least 0.3 m (12") into native soil below bottom of tree pit. Stake top shall be below crown of the tree.
City of Fresno Dept. of Public Works26-15A9 May 2024
1. Provide soft rubber hose tree ties with an enclosed spring loaded action as manufactured by Alden Enterprises "Wonder Tree Ties,” “V.I.T. Products Cinch Tie” or approved equal. Ties shall be attached to tree stake as shown in staking detail on the Plans, with the wire portion of the tie securely attached to the stake (to prevent slippage) via staples, nails, or other means. Ties shall hold tree loosely, and not bind tree too rigidly to the stake, allowing an average of 7½ cm (3") of movement in any direction after tree has been tied. Ties shall also be installed so as to straighten trunks to a perpendicular position (to the ground plane) so they are vertically straight.Place all stakes as directed by the City, or if not directed, place parallel to typical wind direction for the area. 2. Provide tree guards as designated on the Plans. If not designated on the Plans, and reference is made to these Specifications, tree guards shall be placed around the base of all tree trunks/stems in both lawn, ground cover, and shrub areas to protect the tree from mechanical damage. Guards shall be of a flexible, expandable, self-opening type, a minimum of 23 cm (9") high, and have the capacity to protect a tree with a minimum basal trunk diameter of 10 cm (4"). 26-2.17 Mulching a) Mulch as top dressing all tree basin areas with "Walk-on-Bark" to a depth of 5 cm (2"). Mulched tree basins shall be a minimum of 81 cm (32") in diameter. Do not engulf the trunks of the trees with humus. 26-2.18 Establishment Period a) Maintain all basins around trees at a 7½ cm (3") depth. b) Tree stakes that for any reason are damaged or rendered inadequate for support shall be replaced to their original condition. c) Maintain trees in their natural shapes. Tall or scraggly branches shall be thinned out where necessary. In no case shall trees be trimmed by heading or shearing. Any plants severely pruned in this manner shall be removed and replaced at Contractor's expense. d) In all turf areas, maintain a ½ m (1½ ft.) diameter grass free area around each tree. Install arbor guard trunk protective device, or approved equal, on each tree. 26-2.19 Shrubs a) When shrubs are spaced in rows, the total dimension shall be verified and the plants equally spaced within the designated area. Where shrubs are shown in City of Fresno Dept. of Public Works26-16A9 May 2024
an informal pattern, the Contractor shall space the material as shown on the Plans, and as desired by the Engineer. b) Maintain a minimum of 1.0 m (3') of clearance between shrubs and hardscaped features such as sidewalks, curbs, fences, or any such fixture. c) Shrub pits shall be dug with level bottoms, width twice the diameter of root ball and 30 cm (12") deeper than length of root ball. d) During the planting operation, apply (21 gram 20-10-5) Agriform or Best-Tabs planting tablets, or approved equal, as follows: 1. Position the plant in the hole and backfill halfway up the root ball. 2. Place the recommended number of tablets evenly around the perimeter of, and immediately adjacent to, the root ball at a depth which is between the middle and the bottom of the root ball. Complete backfilling, tamp firm the soil, and water. 3. Apply Plant Tablets as follows: 1 Gallon Container Plants: 1 Tablet 5 Gallon Container Plants: 3 Tablets 15 Gallon Container Plants: 6 Tablets 26-2.20 Mulching a) Mulch as top dressing all shrub basin areas with "Walk-on-Bark" to a depth of 5 cm (2"). Mulched shrub basins shall be a minimum of IV). 60 cm (24") in diameter. Do not engulf the stems of the shrubs with humus. b) Establishment Period: Maintain all basins around shrubs at a 7½ cm (3") depth. c) Shrubs shall be maintained in their natural shapes. Overlong or scraggly branches shall be thinned out where necessary. In no case shall shrubs be trimmed by heading or shearing. Any plants severely pruned in this manner shall be removed and replaced at the Contractor's expense. 26-2.21 Ground Cover a) Where plant material is shown in an informal pattern, the Contractor shall space the material as shown at all times, maintaining spacing as shown on the Plans and as desired by the Engineer. Ground cover material shall be planted in a random pattern and not in straight rows.
City of Fresno Dept. of Public Works26-17A9 May 2024
b) Ground cover shall be planted sufficiently deep to cover all roots, and spaced as specified in ground cover list on Landscape Planting Plan. At the time of planting all ground cover plants, the earth around each plant shall be firmed sufficiently to force out all air pockets. Alternate procedures in the planting of ground covers shall be approved by the Engineer, but shall not release the Contractor from the noted guarantee described herein. c) Mulch as top dressing all ground cover basin areas with bark to a depth of 5 cm (2"). Bark shall be "Walk-on-Bark" as manufactured by Fred Horn, Inc., or approved equal. d) Fertilize ground cover areas as needed during maintenance period.26-2.22 Tree Transplanting a) Tree Preparation: 1. Root pruning: All root pruning shall be performed in accordance with "ISA Pruning Standards" (International Society of Arboriculture). Prune all roots to a depth of 60 cm (24"). Pruning location shall be 15 cm (6") inside the tree spade circumference. Pruning shall be performed at least 30 Days prior to anticipated spading date, or as directed by the Engineer. All pruning cuts shall be clean cut. Any torn root endings shall be trimmed back to create clean cuts. 2. Thinning: Trimming objectives shall be to reduce foliage 10% - 25%, to remove crossing branches, and to remove branches that will interfere with future branch spacing. All cuts shall be performed in accordance with "ISA Pruning Standards." All cuts shall be clean with no ragged edges and shall be made just outside the branch collar. Tree wound dressing shall not be applied to the newly exposed wood. Trimming shall be to a branch no smaller than one-half the size of the branch being removed. Limbs with diameter larger than one-quarter the diameter of the trunk, or branches larger than 15 cm (6") shall not be removed unless said removal has been determined by the Engineer to be necessary to provide tree spade access.3. Root Ball: The soil shall be moderately moist; damp enough to encourage root tip development, but not so wet as to be unnecessarily heavy.4. A chalk mark (or in the event of expected rain, an inconspicuous dot of marking paint) shall indicate due north.b) New Site Preparation: 1. Requirements for Drilling: One (1) drainage hole, minimum diameter of 60 cm (24"), shall be drilled for each tree to be transplanted as designated City of Fresno Dept. of Public Works26-18A9 May 2024
on the drawings. The Contractor will be responsible for locating all underground Utilities. The depth of the drainage hole shall be determined as follows: i. The hole must penetrate through and beyond the underlying paving material or hardpan soil stratum. All paving material shall be removed from the drilled hole. The hole shall be drilled to a depth where visual evidence of the subsurface sand or gravel drainage stratum is apparent.ii. If no sand or gravel drainage stratum is apparent, the drainage hole shall be drilled to a minimum of 3 m (10') deep.c) After drilling, water and native soil shall be placed at 60 cm (24") intervals, until all soil is replaced. A minimum waiting period of twenty (20) Days, after drilling, shall be completed before any planting is begun. 1. Requirements for Backfill: A hole shall be excavated to a depth of 1 m (3') and to a diameter so as to create a planting hole extending 1 m (3') beyond the spaded root ball. Any loose hardpan shall be removed from the planting hole. If different layers of soil exist, each stratum shall be loosened and replaced at the same level.i. Native soil shall be used for all backfill during Site preparation. Backfill shall be watered in, and allowed to settle for minimum of 20 Days. Additional native soil shall be added as necessary to maintain ground level during the settling period. ii. Contractor shall spade root ball hole on Day of transplanting. iii. Add peat moss to receiving hole in the quantity listed on the chart below.The peat moss shall be mixed thoroughly in the new hole with enough water such that when the root ball is inserted the peat moss will be forced up around the root ball. PEAT MOSS RATIO TO ROOT BALL SIZE Root Ball Size Peat Moss 45 cm - 60 cm (18" - 24") 0.01 m3(½ cubic foot)60 cm - 81 cm (25" - 32") 0.02 m3(3/4 cubic foot)81 cm - 102 cm (33" - 40") 0.03 m3(1 cubic foot) 104 cm - 127 cm (41 " - 50") 0.04 m3(1½ cubic feet)127 cm - 152 cm (51 " - 60") 0.06 m3(2 cubic feet) 152 cm - 213 cm (61 " - 84") 0.08 m3(3 cubic feet) 213 cm - larger (85" and larger) 0.11 m3(4 cubic feet) City of Fresno Dept. of Public Works26-19A9 May 2024
d) Transplanting1. Tree spade shall be centered around tree. Cuts made by spade shall be clean; spades shall close at base of root ball; and twisting shall be avoided during the removal of the root ball. Any torn roots shall be trimmed such as to create a clean cut. 2. The root ball shall be protected from drying during holding and transported to the new Site. Protection shall be accomplished by clear plastic shielded from the sun, or by regularly wet burlap. Provision shall be made to dampen the root ball, should holding conditions threaten to allow it to dry out.3. Limbs shall be tied from the top down as required to prevent injury during handling.4. Tree shall be oriented at new location such that the original north orientation is maintained. It is especially important to avoid reorienting trees that have been grafted. 5. Tree shall be placed at original soil depth. 6. Agriform plant tabs, or approved equal, 21 gram 20-10-5, shall be placed every 60 cm (24") along the circumference of the root ball 15 cm (6") below the soil line. Backfill material shall be tamped in on all sides of root ball. A berm shall be constructed 60 cm (24") outside the root ball to create a watering basin. Basin shall be filled with water repeatedly, and backfill probed with a pole to remove all air pockets. 7. Evergreen trees, or deciduous trees in leaf, shall be sprayed with an anti-desiccant as directed and approved by the Engineer. e) Staking and Guying 1. Tree shall be staked and guyed from three different equidistant points, one of which shall be in line with prevailing winds. The tree shall be protected from direct contact with the cable. i. Smaller trees 76 cm - 127 cm root ball (30"-50") shall be anchored with wooden stakes and soft wire. ii. Larger trees (greater than 127 cm (50") root ball) shall be anchored with 3 mm or 5 mm (1/8" or 3/16") cable and earth anchors. iii. Tie white surveyor's tape at breast height to each cable.
City of Fresno Dept. of Public Works26-20A9 May 2024
f) Mulching1. "Walk-on-Bark" mulch approved by the City to a depth of 7½ cm (3") shall cover the soil surface at a diameter 60 cm (24") wider than the drip line of the tree in order to improve water retention in the soil and to moderate soil temperatures in the summer. 26-3 PART THREE CLOSE OUT 26-3.1 Clean-up a) After all planting operations are completed, the Contractor shall remove all trash, excess soil, empty plant containers, or other accumulated debris, from the site at no extra cost to the City. Contractor shall repair all scars, ruts or mars in the area caused by work operations. Areas shall be left in a neat and orderly condition. All this Work shall be at the Contractor's expense.26-3.2 Maintenance Period a) The Contractor shall continuously maintain all areas included in the Work during the progress of the Work, through all establishment periods and until acceptance of the Work by the Engineer for maintenance. b) After all irrigation/landscape Work indicated on the City Standard Drawings or herein specified has been completed, inspected, and approved by the Engineer, the City will issue written approval to the Contractor to commence a 90-Day maintenance period. c) Maintenance period Work includes, at a minimum on a weekly basis, all litter pickup and removal, watering, mowing, edging, weeding, plant replacement, mulching, cultivating, pest and disease control, and trimming necessary to bring the planted areas to a healthy growing condition and any additional work needed to keep the areas neat and attractive. During the maintenance period, the Contractor shall be charged prevailing rates for all water used. 1. Inspection Intervals & Rejection of Work: During the progress of the maintenance period, the Contractor and the City shall conduct inspections at no less than 30-Day intervals to determine that ongoing maintenance activities have been conducted by the Contractor. If in the opinion of the City, ongoing maintenance has not been conducted by the Contractor in a satisfactory manner, the Work shall be rectified and/or completed by the Contractor and the maintenance period shall begin over again. When reviewed, if landscape maintenance Work does not comply with requirements, replace rejected work and continue specified maintenance until reviewed by City and found to be approved. Remove rejected plants City of Fresno Dept. of Public Works26-21A9 May 2024
and other materials promptly from Site. Contractor is fully responsible for coordinating with the City closely so that Work passes re-inspection.d) Prior to the final inspection, the Contractor will apply a pre-emergent herbicide at the recommended rate. The maintenance period will cease and begin anew any time the Contractor fails to adequately water, replace unsuitable plants, control weeds or perform other Work necessary for the proper establishment of all new landscaping.e) During the maintenance period, any plant indicating weakness or probability of dying shall be replaced at the Contractor's expense. Constant diligence shall be maintained to prevent disease, insects, and/or rodent infestations and proper preventative or control measures shall be taken. All areas included in the Work shall be substantially clean and free of debris and weeds. All plant materials shall be live, healthy and free of infestations. f) Any erosion or slipping of soil caused by watering shall be repaired at the Contractor's expense. g) All walks, curbs and gutters shall be kept clear of debris, mud, dust and standing water by sweeping, mopping or hosing down as required for complete cleanliness. 26-3.3 Closeout/Guarantee a) All plant and lawn areas shall be guaranteed as to growth and health for a period of one (1) year after acceptance of the Work for maintenance (at the end of the maintenance period). b) Any areas that are not healthy and growing shall be replaced under this section at no additional cost to the City. c) The Contractor, within seven (7) Days of written notification by the City, shall remove and replace all guaranteed plant material that for any reason fails to meet the requirements of the guarantee. Replacement shall be made with plant material as indicated or specified for the first planting, and all such replacement material shall be guaranteed as specified for the original guaranteed material. d) Operations Manual: Prepare and submit an operations manual as part of maintenance Work at least ten (10) Days before the anticipated final acceptance of the project. Final acceptance for the Contractor’s Work shall not be given by the City until the operations manual is fully complete and approved by the City. At a minimum, the operations manual shall include manufacturer standard literature, or neatly typed Contractor generated information sheets certified and approved by the manufacturer. Two (2) original Operations & City of Fresno Dept. of Public Works26-22A9 May 2024
Maintenance manuals shall be submitted in a loose leaf binder in sections that mirror the project specification manual. e) As-Built Plans: It shall be the Contractor’s responsibility to prepare As-Builtplans which are professionally drafted and approved by the City before full acceptance of the project is given by the City. Final As-Built plans shall be professionally drafted by the Contractor onto reproducible Mylar. Final As-Builtsubmittals shall include:1. One (1) full size reproducible Mylar. 2. Three sets of full-size photocopies. 3. One (1) reproducible Mylar at 50% size of the original. 4. Three sets of photocopies of the reduced plan. The originals and copies shall clearly be marked with the words “AS-BUILT PLANS,” and marked with the date of preparation.
City of Fresno Dept. of Public Works27-1A9 May 2024
SECTION 27 – CONSTRUCTION PLAN SUBMITTALS 27-1 WATER AND SEWER PLAN SUBMITTAL STANDARDSSubmit five sets of plans. 27-1.1 The following shall be submitted with the plans: a) $460.00 deposit on Plan Check Fee b) Engineer’s Estimatec) Deeds for Easementsd) Any necessary plans for construction to be done in conjunction with the construction of the sanitary Sewer and/or water.27-1.2 Original drawings shall be: a) “C” Size, 36" x 12" as shown on City Standard Drawing No. P-17. b) Dieterich - Post clear print paper No. 1000-H or approved equal. 27-1.3 The cover drawing shall show the following: a) Vicinity Map b) Subdivision Map with Street Names, Scale: 1" = 100'c) General Construction Notes d) Property linese) Lot or Parcel Numbersf) North Arrow g) Scaleh) Benchmarki) Fee Block j) Legendk) Water Division Signature Block City of Fresno Dept. of Public Works27-2A9 May 2024
l) Fire Department Signature Block (if applicable) m) Fresno Irrigation District Signature Block (if applicable) n) Underground Service Alert (USA) Noteo) List of Material Furnished by the Water Division p) Engineer’s Name, Address, Telephone, Stamp, Expiration Date, Signature, Date of Signingq) Owner’s Name & Address r) Complete Title Blocks) Sheet Index Numberst) Easementsu) Water System1. Size of Pipe2. Valve Locations 3. Fire Hydrant Locations4. Blow-offs5. Water Services v) Sanitary Sewer System1. Size of Pipe2. Manholes3. Slope of Flow Line 4. Flow Line Elevations5. House Branches6. Storm Drains, Manholes, and Catch Basins City of Fresno Dept. of Public Works27-3A9 May 2024
27-1.4 Each drawing shall show the following: a) North arrow shall customarily point to the top or right of the drawingb) Scalec) Complete Title Block including Street name and project limits d) Engineer’s Stamp, Expiration Date, Signature, Date of Signature e) Street names and widths f) Curb patterns and valley guttersg) Lot lines and lot numbersh) Easementsi) Sheet numbers for all adjacent sheets27-1.5 The plan view shall show the following: a) Sanitary Sewer System1. Size of pipe2. Pipe material3. Manhole size and station4. Distance from Sewer to property line5. Flow line elevations of all Sewers intersecting a manhole 6. House branches for each lot with size, length, and station7. Total number and size of all house branches for each Street 8. Slope of the flow line 9. Existing ground and future elevation of Street centerline 10. Length, in feet, of Sewer to be installed11. All Sewer stubs, size and length City of Fresno Dept. of Public Works27-4A9 May 2024
12. Stationing shall begin from an existing Sewer at the lowest point13. Bearing of Sewer14. Material and class of backfill to be used in Pipe Embedment Zoneb) Water System1. Size of pipe2. Pipe material3. Distance from main to property line4. Length, in feet, of Sewer to be installed5. Fire hydrant with station 6. Valve locations with size, type and station 7. Location of water service 8. Station for T’s, crosses 45° and 90° Ells, etc.9. Blow-off size and station 10. Bearing of main (in easements only) 11. Water supply wells and mains within 10 feet of sanitary Sewer main shall be indicated on plans 27-1.6 The profile view shall show the following: a. Horizontal scale shall be 1" = 40' (1" = 20' may be required if area is congested.)b. Vertical scale shall be 1” = 4’ c. Existing and proposed ground and/or Street surface profiles 27-1.7All elevations shall be on United States Geodetic Survey (U.S.G.S.) meansea level datum adjusted to 1970. 27-1.8 Underground Utilities which may conflict 27-1.9 Sanitary Sewer System City of Fresno Dept. of Public Works27-5A9 May 2024
a. Flow line elevation along center line of Sewer b. Size of pipec. Pipe material d. Slope of the flow line e. Cut in feet and flow line elevation at each manholef. All manholes and their stationg. Length, in feet, of Sewer to be installedh. Stationing shall begin from an existing Sewer at the lowest point27-1.10 Water System a) Top and bottom of the main b) Size and material of the main c) Slope of the main d) Location of all blow-offs, air and vacuum valves, centerlines of intersectionStreets and other appurtenances with both station and elevation where applicable.e) Elevations to nearest 0.10 foot of top of pipe.27-1.11 Sanitary Sewers located within 50 feet of a water supply well shall be constructed of material to prevent contamination of the well. 27-1.12 The Developer’s engineer shall submit seventeen (17) sets of plans to the City after the plans are signed by the City. 27-1.13 The Developer’s engineer may submit a plan view layout of the water or sanitary sewer system for design suggestions prior to drawing final plans.
City of Fresno Dept. of Public Works27-6 A9 May 2024
27-2 STREET PLAN SUBMITTAL STANDARDSPublic improvement submittals shall conform the requirements of the Submittal Checklist for the respective plan being submitted. The checklists can be found on the Developer Doorway section of the City of Fresno website: ¶ https://www.fresno.gov/publicworks/developer-doorway/ City of Fresno Dept. of Public Works28-1A9 May 2024
SECTION 28 – TRAFFIC STRIPES AND PAVEMENT MARKINGS 28-1 GENERAL This Work shall consist of furnishing and applying thermoplastic or solvent borne paint traffic stripes (traffic lines) and pavement markings, including glass beads, and furnishing and placing raised pavement markers at the locations and in accordance with the details shown on the Plans or designated by the Engineer, and as specified in these Specifications. For the purposes of these Specifications, traffic stripes (traffic lines) are defined as longitudinal centerlines and lane lines which separate traffic lanes in the same or opposing direction of travel, and longitudinal edge lines which mark the edge of the traveled way or the edge of lanes. Pavement markings are defined as transverse markings which include, but are not limited to, word and symbol markings, limit lines (stop lines), crosswalk lines, shoulder markings, parking stall markings, and railroad grade crossing markings. Pavement markers are raised pavement markers, reflectorized or non-reflectorized, of the type and color shown on the Plans and/or set forth in the Specifications. 28-2 MATERIALS Paints shall be solvent-borne, designed for traffic use and shall conform to the latest revisions of the San Joaquin Valley Unified Air Pollution District, Control Architectural Coatings Rule 4601.Raised pavement markers shall conform to Section 81-3 of the State Standard Specifications. Adhesive for raised pavement markers shall conform to Section 81-3.03 of the State Standard Specifications for rapid set epoxy and standard set epoxy for standard set epoxy, as directed by the Engineer. 28-3 REMOVAL OF EXISTING MARKINGS Where called for on the Plans and/or Specifications existing pavement striping, symbols, legend, and markings proposed for removal shall be removed by wet sandblasting or other approved methods which will cause the least possible damage to the pavement. Dry sandblasting may be used in selected areas only with the permission of the Engineer and with approval of the air pollution control authority having jurisdiction over the area in which the Work will be performed. Alternate methods of removal require prior approval of the Engineer. Where their removal is called for on the Plans and /or Specifications, raised markers shall be removed by an approved method that will result in the least possible damage to the pavement. Where raised pavement markers are to remain, the Contractor shall take special care to protect existing reflective pavement markers and shall, at Contractor’s expense, replace all coated markers.
City of Fresno Dept. of Public Works28-2A9 May 2024
Where an existing lane stripe is removed, slurry seal shall be applied to the affected areas. Width of the slurry seal application shall be at least three times wider than proposed or existing stripe, whichever is wider. Where more than one lane stripe is removed in the same travel direction, the extent of the slurry seal application shall be the full pavement width of the travel direction’s cross section for the full length of lane stripe removal. Where a series of gore stripes or hatch markings are removed within a travel lane, the extent of slurry seal application shall be the entire travel lane for the length of the gore stripes or hatch markings removal. Where existing pavement legends or symbols are removed, slurry seal shall be applied to the affected areas in a uniform square or rectangle that extends at least six inches past the limits of the removed legend or symbol. All existing striping, stenciling or raised pavement markers, whether shown for removal or not, that will be in conflict with the intent of any new striping diagram, will be removed. Removal shall be at the direction of the Engineer and no additional compensation will be allowed.28-4 PLACEMENT OF THERMOPLASTIC TRAFFIC OR SOLVENT-BORNE PAINT STRIPES AND PAVEMENT MARKINGSPreparation of surfaces and application of thermoplastic or solvent-borne paint material shall conform to all requirements of Sections 84-2.03B and 84-2.03C of the State Standard Specifications, and these Specifications. Tolerances and appearance shall conform to the requirements of Section 84-2.03 of the State Standard Specifications.Word markings, letters, numerals, legends and symbols shall be applied utilizing suitable approved equipment together with approved stencils and templates. All markings shall be standard and shall be identical with those used by the City. When no previously applied figures, markings, or traffic striping are available to serve as a guide, suitable layouts, such as “cat-tracking”, shall be spotted in advance of the permanent application. Written approval of temporary layout shall be obtained prior to permanent application. Where necessary, the Engineer will furnish the necessary control points for all required pavement striping and markings. Alignment and layout of the Work by the Contractor shall conform to Section 84-2.03 of the State Standard Specifications. The Contractor shall provide an experienced technician to supervise the location, alignment, layout, dimensions, and application of the pavement striping and marking. In areas of high traffic volume, the Contractor shall schedule Work to apply traffic lines and markings in off-peak traffic hours, or on weekends. The Contractor shall mark or otherwise delineate the traffic lanes in the new roadway or portion of roadway, or detour before opening it to traffic.
City of Fresno Dept. of Public Works28-3A9 May 2024
All markings and striping shall be protected from injury and damage of any kind while the material is drying. All adjacent surfaces shall be protected from disfiguration by spatter, splashes, spillage, and dripping of material.The Contractor shall use proper and sufficient directional signs, warning devises, barricades, pedestals, lights, traffic cones, flag persons, or such other devices to protect the Work, workers and the public.28-5 PLACEMENT OF RAISED PAVEMENT MARKERSPreparation of surfaces and placement of raised pavement markers shall conform to the requirements of Section 84-2.03B of the State Standard Specifications, and these Specifications. The Contractor shall provide an experienced technician to supervise the application of the raised pavement markers. In areas of high traffic volume, the Contractor shall schedule Work to apply traffic markers in off-peak traffic hours, or on weekends.28-6 MEASUREMENT Quantities of striping and marking pavement shall be measured on a lump sum basis andshall also include any required removal of existing pavement striping or markings. 28-7 PAYMENT The lump sum price bid for striping and marking pavement shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals and for doing all the Work involved therein as shown on the Plans, as set forth in the Specifications and as directed by the Engineer. This Work will also include furnishing and installing raised pavement markers where called for and removing existing markings, where called for.
City of Fresno Dept. of Public Works29-1 A9 May 2024
SECTION 29 – CONCRETE MASONRY WALL 29-1 GENERAL This Work shall consist of furnishing all materials and constructing a concrete masonry wall at the locations as shown on the Plans. Included is the footing construction, reinforcing steel, concrete masonry units and other facilities to complete the wall as indicated on the City Standard Drawings, and as specified herein. Concrete masonry wall shall be installed to the lines and grades shown on the Plans or as directed by the Engineer.29-2 MATERIALS Materials for concrete masonry wall construction shall be as follows: 29-2.1Concrete Masonry Units: Hollow load bearing masonry units shall be Grade A units conforming to the ASTM Specifications Designation C90 and in addition the requirements of the Quality Control Standards of the Concrete Masonry Association. All masonry units shall be sound and free of cracks and other defects that would interfere with the proper placing of the unit or impair the strength or permanence of the construction. Minor cracks incidental to the usual method of manufacture, or minor chipping resulting from customary methods of handling in shipment and delivery, shall not be deemed grounds for rejection. 29-2.2Cement: Cement shall be Type I or Type II Portland cement conforming to ASTM Specification Designation C150. 29-2.3Mortar: Mortar shall be freshly prepared and uniformly mixed in the ratio of one part Portland cement, ¼ part minimum to ½ part maximum lime putty or hydrated lime, damp loose sand not less than 2½ and not more than 3 times the sum of the volumes of the cement and lime used (4½ parts maximum), and shall conform to ASTM Specification Designation C270. If plastic type cement is used, lime putty shall be omitted. 29-2.4Grout: Grout for pouring or pumping shall be as follows: a) Grout for pouring shall be of “fluid consistency” and shall conform to ASTM Specification Designation C476. “Fluid consistency” shall mean as fluid as possible for pouring without segregation of the constituent parts. It shall be freshly prepared and uniformly mixed in the ratio of volumes as follows:
City of Fresno Dept. of Public Works29-2 A9 May 2024
Type Grout Space in its Least Dimension (inches) Portland Cement (parts) Damp Loose Sand (parts)Damp Loose Aggregate (parts) Fine Less than 3 1 2¼ min - 3 maxCoarse 3 or more 1 2 min - 3 max 1 to 2b) Grout for pumping shall be of “fluid consistency” as defined above and shall have not less than seven sacks of cement to each cubic yard of grout.29-2.5Lime: Hydrated lime shall conform to ASTM Specification Designation C207. 29-2.6Aggregate: Aggregate for mortar shall conform to ASTM Specification Designation C144. Aggregate for grout shall conform to ASTM Specification Designation C404. 29-2.7Concrete: Portland cement concrete for footing shall be Class A and conforming to the requirements of Section 90 of the State Standard Specifications. 29-2.8Reinforcing steel: Reinforcing steel shall be deformed bars conforming to ASTM Specification Designations A15 and A305, except that 0.25" ties may be plain bars. Wire reinforcement shall conform to ASTM Specification Designation A82. 29-3 CLEARING AND GRUBBING Clearing and grubbing shall conform to the requirements of SECTION 10 of these City Standard Specifications. 29-4 EXCAVATION AND PREPARATION OF SUBGRADEAny required excavation or embankment construction for the wall footing shall be to the lines and grades shown on the Plans for established by the Engineer. Excavation, embankment construction and preparation of subgrade shall conform to the requirements of SECTION 11 of these City Standard Specifications. Unless otherwise indicated, minimum relative compaction of finished subgrade for wall footing shall be 90 percent. 29-5 CONSTRUCTION The wall and footing construction shall be of the highest quality workmanship and all walls shall be laid true, level, plumb and neat and in accordance with the Plans and the City Standard Drawing pertaining thereto.
City of Fresno Dept. of Public Works29-3A9 May 2024
Forms for footing construction shall be straight and true. The exposed (after wall construction) finish top surface of the footing shall be a medium sweat finish. Mortar and grout shall be mixed by placing half of the water and sand in the operating mixer. Then the cement, lime and remainder of the sand and water shall be added. After all ingredients are in the batch mixer, they shall be mechanically mixed for not less than 5 minutes. Hand mixing shall not be employed unless specifically approved. The mortar shall be retempered with water as required to maintain high plasticity. Retempering on mortar boards shall be done only by adding water within a basin formed with the mortar and the mortar reworked into the water. Retempering may only be done prior to hardening of the mortar. Any mortar and grout which is unused after 1½ hours from initial mixing time shall be discarded.For bonding the masonry to the foundation, the top surface of the concrete foundation shall be clean and with laitance removed and aggregate exposed before starting the masonry construction. The starting joint on foundations shall be laid with full mortar coverage on the bed joint, except the area where grout is to contact the foundation.Mortar joints shall be straight, clean, and uniform in thickness and shall be tooled. Tooling shall be done when the mortar is partially set but still sufficiently plastic to bond. All tooling shall be done with a tool that compacts the mortar, pressing the excess mortar out of the joint rather than dregging it out. Joints that are not tight at the time of tooling shall be raked out, pointed, and then tooled. If it is necessary to move a masonry unit after it has been once set in place, the unit shall be removed from the wall, cleaned and set in fresh mortar. Lintels, capping units and all bearing plates set by the mason shall be set in a full bed of mortar. In cases where the wall is in a frontage road island or against an unoccupied area such as railroad rights-of-ways, all cells shall be filled with grout. In other situations, only the cells with reinforcement are to be grouted. All grout shall be paddled or vibrated in place to consolidate without separation. Mortar droppings shall be kept out of the grout space.Mortar that projects into the grout space shall be removed so that protrusions will not restrict the flow of grout (grout will tend to bridge at these locations and require too much puddling or vibration to assure complete filling of grout space). Vertical cells to be filled shall have a vertical alignment to maintain a continuous unobstructed cell area not less than 2" x 3". Grout for cells containing reinforcement shall be stopped 1½" below the top of the course to form a key at pour joints. Reinforcing bars shall be straight except for bends or hooks as detailed on the City Standard Drawings. Horizontal reinforcing bars shall be laid on the webs of the masonry units in continuous masonry courses, consisting of bond-beam or channel units, and shall be solidly grouted in place. Vertical reinforcing steel shall have a minimum clearance of 0.28" from the masonry, and not less than one bar diameter between bars. Wire reinforcement shall be completely embedded in mortar or grout. Joints with wire reinforcement shall be at least twice the thickness of the wire.
City of Fresno Dept. of Public Works29-4A9 May 2024
Concrete scum, and grout stains on the wall shall be removed immediately. After the wall is constructed, it shall not be saturated with water for curing or any other purpose. At the conclusion of the masonry work, the Contractor shall clean all the masonry, remove equipment used in the Work, and remove all debris, refuse, and surplus masonry material, and dispose of them away from the premises. 29-5.1 Measurement Measurement for concrete masonry wall will be by the lineal foot of concrete masonry wall installed as shown on the Plans, to be determined by the Engineer from actual measurement. 29-6 PAYMENT When the contract does not include a pay item for clearing and grubbing, or for excavation and preparation of subgrade, as above specified, and unless otherwise provided in the Specifications, full compensation for any necessary clearing and grubbing, and any excavation and preparation of subgrade required to prepare the subgrade and pad for the wall foundation, as shown on the Plans or indicated by the Engineer, shall be considered as included in the price bid for concrete masonry wall and no separate payment will be made therefor. The unit price bid per lineal foot for concrete masonry wall shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals and for doing all the Work involved therein as shown on the Plans, as set forth in the Specifications, and as directed by the Engineer. This shall include, but not be limited to clearing and preparing the wall pad and subgrade (where no separate item is provided therefor), constructing concrete footing, furnishing and placing reinforcing steel, concrete block, mortar and grout, and all incidentals.
City of Fresno Dept. of Public Works30-1A9 May 2024
SECTION 30 – RESERVED
City of Fresno Dept. of Public Works31-1A9 May 2024
SECTION 31 – TECHNICAL SPECIFICATIONS FOR INTELLIGENT TRANSPORTATION SYSTEMS 31-1 DEFINITIONS Unless the particular provision or context otherwise requires, the definitions and provisions contained in this section shall govern the construction, meaning and application of words and phrases used in the conditions in this section 31. The definition of each word or phrase shall constitute, to the extent applicable, the definition of each word or phrase which is derivative from it, or from which it-is a derivative, as the case may be.Intelligent Transportation System (ITS): Electronics, communications, or information processing used singly or in combination to improve the efficiency or safety of a surface transportation system. Qualified Products List (QPL) – City list of approved ITS equipment. 31-2 GENERAL All equipment and materials shall be certified to meet nationally recognized standards and Listed, Labeled or Identified by the appropriate Nationally Recognized Test Laboratories (NRTL) or Inspection Agencies. All electrical installations shall be in accordance with the NFPA National Electrical Code. Examination, identification, installation, and use of materials and equipment shall be approved by the Engineer, Traffic Engineer or their representative.All ITS Work must be constructed in accordance with approved Plans prepared by a registered professional engineer and these Specifications. Existing electrical and communication systems, or approved temporary replacements thereof, shall be kept in effective operation during the progress of the Work, except when shutdown is permitted in writing by the City CM, City CM Engineer or their representative.The locations of foundations, standards, services, pull boxes and other appurtenances shown on the Plans are approximate. Exact locations and grades will be established as necessary by the City CM, City CM Engineer or their representative. All Work shall comply with Section 11-104 of the City of Fresno Municipal Code, the National Electrical Manufacturer's Association Standards and all regulations and codes as stated in Section 86-1.01D of the State Standard Specifications. Nothing in the Plans and Specifications shall be construed to permit Work not complying with these codes.
City of Fresno Dept. of Public Works31-2A9 May 2024
31-3 MATERIALS Attention is directed to Section 6 of the State Standard Specifications. All materials required to complete the Work under this contract shall be furnished by the Contractor.The materials furnished and used shall be new, except such used materials as may be specifically provided for on the Plans. All Work and materials shall be in full accordance with the latest rules and regulations of the National Board of Fire Underwriters, local and State laws and regulations, the State of California Industrial Accident Commission's Safety Orders, and regulations of the Pacific Gas and Electric Company pertaining to service equipment and installations thereof. 31-4 EQUIPMENT LIST Equipment list and drawings shall conform to the provisions in Section 86-1.01C of the State Standard Specifications. All equipment and materials that the Contractor proposes to install shall conform to these Specifications and the contract Plans. A list of substitute equipment and/or materials, along with a written descriptive summary, describing the functions of the components which the Contractor proposes to install shall be submitted along with its Proposal. The list shall be complete as to the name of the manufacturer, size and identifying number of each item. The list shall be supplemented by such other data as may be required. In all cases, the judgment of the respective Electrical Superintendent, the City ITS Supervisor or their representative shall be final as to whether substitute equipment and/or material recommended by the Contractor conforms to the intent of these Specifications and is acceptable for use.31-5 WARRANTIES, GUARANTEES AND INSTRUCTION SHEETSWarranties, guarantees and instruction sheets shall conform to the provisions in Section 5-1.47 of the State Standard Specifications and these Specifications. All equipment furnished shall be guaranteed to the City by the manufacturers for a period of not less than one (1) year, unless otherwise indicated, following the date of acceptance of the signal installation of such equipment. If any part(s) is found to be defective in materials or workmanship within the one-year period, and it is determined by the respective Electrical Superintendent, the City ITS Supervisor or their representative, or by an authorized manufacturer's representative that said part(s) cannot be repaired on the Site, the manufacturer shall provide a replacement part(s) of equal kind and/or type during the repair period and shall be responsible for the removal, handling, repair or replacement and reinstallation of the part(s) until such time as the ITS equipment is functioning as specified and as intended herein. The repair period shall in no event exceed 72 hours, including acquisition of parts. The one-year guarantee on the repaired or replaced parts shall again commence with the date of reassembly of the system.
City of Fresno Dept. of Public Works31-3A9 May 2024
All Work performed by the Contractor shall be guaranteed in writing to the City CM, City CM Engineer or their representative for the 12 months from the date of acceptance.31-6 MAINTAINING EXISTING AND TEMPORARY ELECTRICAL SYSTEMSThe Contractor shall notify the respective Electrical Superintendent, the City ITS Supervisor or their representative at least two full working days (not less than 48 hours) prior to the shutdown of any traffic signal, lighting or communication system. The Contractor may use temporary splices and wiring as approved by the City CM, City CM Engineer or their representative to maintain existing traffic signal and ITS systems. After completion of project, all wiring shall meet City standards. Shutdowns of ITS systems shall be limited to the period from 9 a.m. to 4 p.m. of normal working days, excluding legal holidays, weekends, and nonworking days as directed by the City CM, City CM Engineer or their representative. 31-7 SCHEDULING OF WORK Scheduling of Work shall conform to the provisions in Section 8-1.02 of the State Standard Specifications. Contractor shall submit a written schedule to the City CM, City CM Engineer or their representative one-week in advance of the start of ITS Work. Any deviation from the approved submitted schedule must be approved by the City CM, City CM Engineer or their representative. The Contractor shall notify the City CM, City CM Engineer or their representative at least two working days in advance of any electrical Work and also at least two working days in advance of any Work done intermittently to facilitate inspection. 31-8 TRAFFIC CONTROL Traffic control shall be provided in accordance with the State, "Manual of Traffic Controls for Construction and Maintenance Work Zones," latest Caltrans adopted edition, and Section 7-1.03 of the City Standard Specifications. 31-9 36" X 60" ITS VAULT(S) Vaults shall be concrete with a reinforced spring loaded torsion assisted steel lid, have 18 fiber optic holding racks, and cross bar to hold the lid from closing. All vaults shall have a smooth finished bottom including a sump hole for drainage. The concrete box design shall be reinforced to provide high strength without excess weight. Special knockouts shall be provided and incorporated into the construction of each wall. Each communication conduit entrance shall be sealed with duct plugs and trimmed smooth. Wall penetrations shall be water resistance and seal from the interior to the exterior.
City of Fresno Dept. of Public Works31-4A9 May 2024
Vault Body and Lid SpecificationsDimensions:Cover: 36” x 60” Base: 36” x 60” x 5.25” Shipping: 2-pc. with C.I. cover Lid Markings: “ITS COMMUNICATIONS” Tension assisted spring loaded for light weight checker plate cover with strength galvanizing finish with non-skid surface. Vault shall have sump hole in vault base with 2 ton riss pin for handling. Knockouts shall be on all corners. Knockouts shall be thinwall, 8” x 16,” 4 each per side. Installation Procedures for 36” x 60” Vault(s) Conduit entrances to vaults shall be spaced approximately 2 inches from bell edge to bell edge. Provide a uniform separation of conduit bells with complete grouting to make a smooth wall without blockage of conduit access. Conduits shall extend a minimum of 6 inches, 8 inches maximum, beyond the inner wall of any vault or structure. Start pacing conduits in a gradual taper 10 feet prior to entrance of vault. Use of concrete vibrator shall be required to ensure complete distribution of concrete sand slurry around outside wall of the vault. Conduit Identification: Identify each conduit using the conduit number shown in drawings by means of a stamped brass tag at each end at access vaults. All vaults shall rest on a 6 inch layer of crushed rock which extends past the wall of the vault as shown on the City Standard Drawings. The void between the edge of the vault and native soil shall be backfilled with sand. Vaults shall be installed to matched existing grade and conform to sloped areas for drainage. All vaults shall be installed with extensions. All vaults shall be wrapped with building paper prior to backfilling. When the vault is installed in a non-sidewalk area, install a formed concrete apron, 1-foot wide and 4 inches deep around the vault. The apron shall be sloped to drain away from the vault. Non-Abrasive Non-Slip Coating Non-Slip Coating shall comply with MIL-W-5044 and shall be applied to all vault covers. Coating shall be a one component, brushable, non-abrasive, non-slip deck coating formulated with fast drying resins. Aggregates shall be non-abrasive and non-sparking and shall not scratch or damage underlying metal surfaces.
City of Fresno Dept. of Public Works31-5A9 May 2024
Non-slip coating shall be resistant to fire, acids, alkalis, solvents, grease, oil, salt water, detergents, alcohol, gasoline, cellulube and other hydraulic fluids. Non-slip coating shall be applied over a primer. Two component epoxy primers shall be used. Non-Slip coating shall be applied to a clean, dry surface. All rust, mill scale, paint, dirt, grease, oil, etc. must be completely removed. Methods of cleaning steel surface are as follows: Wash metal surface with one coat of a wash primer conforming to MIL-C-8514, applied in accordance with MIL-C-8507. Primer shall be applied before coating. Primer shall be applied on surfaces immediately after the surface has been cleaned and before rust or oxidation. 31-10 48" X 84" ITS VAULT(S) Vaults shall be concrete with a reinforced spring loaded torsion assisted steel lid, have 18 fiber optic holding rack, and cross bar to hold the lid from closing. All vaults shall have a smooth finished bottom including a sump hole for drainage. The concrete box design shall be reinforced to provide high strength without excess weight. Special knockouts shall be provided and incorporated into the construction of each wall. Each communication conduit entrance shall be sealed with duct plugs and trimmed smooth.Wall penetrations shall be water resistance and seal from the interior to the exterior.Vault Body and Lid SpecificationsDimensions:Cover: 48” x 78” Base: 48” x 78” x 5.25” Shipping: 2-pc. with C.I. cover Lid Markings: “ITS COMMUNICATIONS” Tension assisted spring loaded for light weight checker plate cover with strength galvanizing finish with non-skid surface. Vault shall have sump hole in vault base with 2 ton riss pin for handling. Knockouts shall be on all corners. Knockouts shall be thinwall, 8” x 16”, 4 each per side. Installation Procedures for 48" x 84" Vault(s) Conduit entrances to vaults shall be spaced approximately 2 inches from bell edge to bell edge. Provide a uniform separation of conduit bells with complete grouting to make a smooth wall without blockage of conduit access. Conduits shall extend a minimum of 6 inches, 8 inches maximum, beyond the inner wall of any vault or structure. Start pacing conduits in a gradual taper 10 feet prior to entrance of vault. Use of concrete vibrator shall City of Fresno Dept. of Public Works31-6A9 May 2024
be required to ensure complete distribution of concrete sand slurry around outside wall of the vault.Conduit Identification: Identify each conduit using the conduit number shown in drawings by means of a stamped brass tag at each end at access vaults. All vaults shall rest on a 6 inch layer of crushed rock which extends past the wall of the vault as shown on City Standard Drawings. The void between the edge of the vault and native soil shall be backfilled with sand. Vaults shall be installed to matched existing grade and conform to sloped areas for drainage. All vaults shall be installed with extensions. All vaults shall be wrapped with building paper prior to backfilling. When the vault is installed in a non-sidewalk area, install a formed concrete apron, 1-foot wide and 4 inches deep around the vault. The apron shall be sloped to drain away from the vault.Non-Abrasive Non-Slip Coating Non-Slip Coating shall comply with MIL-W-5044 and shall be applied to all vault covers. Coating shall be a one component, brushable, non-abrasive, non-slip deck coating formulated with fast drying resins. Aggregates shall be non-abrasive and non-sparking and shall not scratch or damage underlying metal surfaces. Non-slip coating shall be resistant to fire, acids, alkalis, solvents, grease, oil, salt water, detergents, alcohol, gasoline, cellulube and other hydraulic fluids. Non-slip coating shall be applied over a primer. Two component epoxy primers shall be used. Non-Slip coating shall be applied to a clean, dry surface. All rust, mill scale, paint, dirt, grease, oil, etc. must be completely removed. Methods of cleaning steel surface are as follows: Wash metal surface with one coat of a wash primer conforming to MIL-C-8514, applied in accordance with MIL-C-8507. Primer shall be applied before coating. Primer shall be applied on surfaces immediately after the surface has been cleaned and before rust or oxidation. 31-11 ITS CONDUITS / FIBER DUCTS This Specification covers the performance characteristics with minimum and maximum acceptable performance levels for 1.5” SDR 11 conduit. Vendors supplying conduit as City of Fresno Dept. of Public Works31-7A9 May 2024
described by this Specification shall demonstrate compliance with the values described in this document. All ducts shall be smooth wall, direct burial rated and specifically designed for fiber optic cable. Electrical conduit, PVC pipe, galvanized pipe or other similar products will not be allowed. It is the intent of these Specifications to define the parameters by which conduit will be evaluated. Furthermore, the Specifications will serve as a guide for the purpose of vendor qualification. The ITS / Fiber Duct conduits shall include bundles of two (2) 1½”, four (4) 1½”, six (6) 1½”, twelve (12) 1½” or one (1) 2” as shown on the Plans.31-11.1 Material Specifications Property Test Method(ASTM) Value CellClassDensity (g/cm) D 792A orD 1505 0.940 -0.955 3Melt Index (g/10 min) D 1238 < 0.15 4 4Flexural Modulus (psi) D 790 110,000 -160,000 5Tensile Strength @ Yield (psi) D 638 3,000 -3,500 4ESCR, Condition B D 1693 0/10 Failures/1,000 hrs. 7Hydrostatic Design Basis (psi) D 2837 Not Pressure Rated 0Tensile Strength @ Break D 638 4,500 Min. N/A Tensile Elongation @ Break (%) D 638 750 Min. N/A Brittleness Temp. (C) D 746 < -76 N/A 31-11.1.1 Conduit Physical Properties Dimensional measurements shall be performed on samples removed from each complete length of finished conduit, unless otherwise specified. All dimensions will be expressed in inches and carried out three decimal places. Outer diameter and wall thickness will be provided as a stated standard for each conduit size with a plus/minus tolerance. Inner diameter will be stated as a nominal value. 31-11.1.2 Dimensional requirements for 1.5” SDR 11 conduit Nominal SizeOutside Diameter Wall Thickness Nominal Inner Diameter1.50" 1.900 +/-0.012 0.173 +0.026 1.528Ovality shall be expressed as a percent and calculated using IEEE Standards and included with the submittals. The ovality shall be no more than five percent.
City of Fresno Dept. of Public Works31-8A9 May 2024
The conduit shall have a minimum bend radius equal to twenty inches and shall have a safe working pull strength greater than 3,000 pounds. Conduit shall be certified by the manufacturer with a Letter of Certificationdocumenting that the conduit meets the performance requirements and materialrequirements of ASTM F2160. Communication conduit shall be marked with the ASTM F2160 designation. In the event of a discrepancy between these specifications and ASTM F2160, therequirements of ASTM F2160 shall govern. 31-11.1.3 Quality Control Manufacturer will be responsible for inspecting 100% of the conduit supplied for Conduit Dimensions, Ovality, and Visual Appearance. Contractor shall provide a Certificate of Compliance that the conduits meet the provisions of this section.31-11.1.4 Print Legend The conduit shall be printed in intervals of two feet (+/-1%) with a standard print height of ¼” (+/-1/16”) and shall contain the following information: a) Current Year b) Manufacturer c) Conduit diameter d) Wall Thickness e) Product Trade Name f) Sequential Footage Markings The manufacturer shall be capable of supplying conduit with longitudinal stripes or tracers of the above data in increments of four, at ninety-degree intervals around the circumference of the conduit. 31-11.1.5 Physical Appearance The inside surface is a smooth wall or longitudinal ribbed construction. The outside shall be smooth wall construction and shall be in new condition. 31-11.1.6 Packaging and Shipping City of Fresno Dept. of Public Works31-9A9 May 2024
The conduit shall be supplied in standard lengths of 3,000 feet and shall be placed on an 80” x 40” x 38” reel (Flange x Drum x Traverse). The HDPE conduit shall be delivered to the Site with Cargo Master Lift Gate service, or approved equal. Each reel shall be tagged with the following information: a) Manufacturer’s Shipping Address b) Manufacturer’s Product Code c) Length of Conduit d) Product Description e) Tracer Color f) Reel Number and Bar Code g) Certificate of Compliance that the conduits meet the provisions of this section 31-11.1.7 Pull-Tape Pull-tape shall be installed in ALL HDPE conduit as described in this section. The ends of the tape shall be secured to the conduit to ensure that the tape does not draw back into the conduit. Pull tape shall have a pull strength of 1,800 lbs. One conduit shall be installed with a toneable pull tape. Furthermore, there shall be 3% (+/- 0.5%) of excess tape fill inside the final conduit product. 31-11.1.8 Couplings & Bells a) Coupling: All couplings shall be a compression type fitting. b) Communication Bells: Communication bells installed on the ends of conduits shall be joined with a glue compatible with the materials in which it is supplied. Bells shall be installed on each conduit that enters or exits any type of pull box or vault. See Plans and details for sweep and entrance construction requirements for the construction of vaults. 31-11.2 Toneable Conduit (White)31-11.2.1 Description All HDPE conduits shall have toneable capabilities. Only one conduit in each bundle of conduits is required to have toneable capabilities. This toneable conduit City of Fresno Dept. of Public Works31-10A9 May 2024
shall be an 18-guage wire built into the wall of the conduit. See detail for conduit splice at the coupler. Toneable conduit shall be combined with a polyethylene conduit with an integrated toning wire. The toning wire shall have the ability to be ‘ripped’ or pulled out of the conduit wall with simple hand tools, enabling easy access for toning and/or splicing to subsequent lengths. 31-11.2.2 Product Details The toneable conduit (white) shall be made from high quality high-density polyethylene (HDPE), conforming to the performance criteria as identified in the Material Specifications table above within this subsection 31-11. Toneable conduit shall have a wire that is 18-gauge copper clad steel coated with fluoropolymer jacket. The wire shall be embedded in the wall of the conduit. The copper clad steel (CCS) shall be necessary for amount of copper to carry a tone over long distances and shall have a steel core that is durable (copper not allowed). CCS shall easily be ripped out of the wall without breaking the wire. The wire shall meet the specifications listed in this Specification. The fluoropolymer-coated wire shall be ‘ripped’ out of the conduit wall using a pair of pliers. The fluoropolymer shall allow the wire to move independent of the conduit, eliminating stresses on the wire and conduit and ease the separation of the wire from the wall of the conduit. The fluoropolymer coating shall provide critical insulative and corrosion protection to the ‘exposed’ wire. 31-11.2.3 Toning Function Contractor shall test all conduits using a generated signal, or ‘tone’, that is transmitted over a conductor so that the portion of the conductor buried below the earth’s surface can be located without digging or using any special tools. Any conduits that cannot be located using this method of toning shall be removed and replaced. The tone shall be produced at a very low frequency with a transmitter tuned to a particular frequency. The frequency range available on the transmitter may vary between equipment used and range shall be from 400 Hz to about 80 KHz. Transmission power shall be controlled in a range of .033 watts up to 5.0 watts. A ‘radio’ receiver tuned to locater shall be able to transmit frequencies is then used to precisely locate the energized wire. The set-up requires a transmitter be attached to the conductive material that will act as an ‘antenna’ and a ground plane shall be established at the end of the antenna to close the circuit. Contractor shall proof each toneable conduit to accepted practices and tolerances and to ensure continuity with City City of Fresno Dept. of Public Works31-11A9 May 2024
representative on walkout proofing. This shall be required of all trench line construction. 31-11.2.4 Installation Procedure: Splicing the wire together with insulation shall be conducted. The wire from each Toneable conduit shall be grounded in every vault, pull-box or termination point.Each grounding system shall include a six foot grounding rod and attachment system for the wire installed in each vault, pull-box or termination point. Contractor shall remove the fluoropolymer jacket before crimping the connector. Contractor shall minimize the amount of fluoropolymer jacket to be removed in making the connection, leaving the remainder of the jacket intact to protect the wire from corrosion. Simple wire splices for 18 AWG copper clad steel wire shall be used and environmentally protected with a self-healing waterproof tape. All splices below grade shall be environmentally sealed against the elements by the Contractor. Splices above grade such as inside an enclosure shall have the ends sealed with tape per manufacturer specifications. At each end of the conduit the wire shall be stripped from the conduit to a length long enough for splicing, or ground for toning. 31-11.2.5 Toneable Wire: a) Shall have “Clean Design” or smooth wall for non-interference during installations. b) Shall have high tensile strength copper clad steel 18 AWG wire to transmit tone-able signals over extended distances. c) Shall have capabilities to locate with toning equipment from the ground surface. d) Shall have Teflon coated toning wire to provide extended underground service. e) Shall have easily coupled to provide extended lengths. f) Shall have easy/convenient wire “Rip Out” for coupling. “Rip Out” design for toneable wires to be connected outside the coupling maintaining the dry seal.
City of Fresno Dept. of Public Works31-12A9 May 2024
31-11.3 Colors & SizesSee Approved Engineered Plans 31-11.4 Duct Plugs Duct plugs shall be all high-impact plastic construction with durable elastic gaskets, corrosion proof, water-tight and reusable. Duct plugs shall consist of a bottom and top compression plate, gasket and tightening nut. Duct plugs shall either be blank or consist of a biplex sealing system or approved equal. Installation The Contractor shall pot-hole, daylight and identify the precise location of existing Utilities prior to crossing them with the proposed conduit system. The Contractor shall conduct a USA investigation prior to construction. The Contractor shall also video tape and date all Utility markings prior to construction. Any marked Utility damaged by the Contractor shall be replaced at the expense of the Contractor. The Contractor shall take immediate action to resolve emergency situations. All spoils from trenching shall be removed daily. Spoils piles will not be allowed to be stored in the Street, on sidewalk, curb & gutter, on private property without written permission. All trenches and Utility crossings shall be backfilled with a two (2) sack colored (red) sand slurry. Mechanical vibration of the slurry will be required to ensure all voids have been filled. Conduits shall be properly secured by an approved method prior to mechanical vibration. All trenches in the asphalt roadway shall be filled with slurry up to the edges of the asphalt. The trenches shall be protected until the slurry hardens and can be opened to traffic. Slurry of trenches in landscape and dirt areas only needs to cover the top of conduits by 12 inches. All trenches shall be constructed parallel to the edge of pavement or to the face of curb. Any deviation shall take place in a 50 foot gradual transition. The trench locations vary and will be adjusted for conflicts with utilities. All trenches in the roadway or sidewalks shall not deviate from line (parallel to edge of pavement or curb face) more than three inches unless a 50 foot transition is required. All landscape irrigation facilities shall be modified as necessary to allow for new conduits. All damaged landscape material, ground cover, grass, plants, etc. shall be replaced in kind. All damaged grass shall be replaced with sod. At locations where no relocation of existing sprinkler systems are shown on the Plans and the Contractor must disturb said systems in order to complete the Work City of Fresno Dept. of Public Works31-13A9 May 2024
under this and other items, such as while removing concrete Work and forming new concrete Work, the Contractor shall temporarily cap said line and then return sprinkler systems to service within 48 hours. If Contractor cannot restore service in 48 hours, then Contractor shall make provision for temporary irrigation of affected landscape every 48 hours until permanent irrigation service is restored.The method of temporary irrigation service shall be approved by the City CM, City CM Engineer or their representative.Tree Diameter (inches) Distance from Tree Trunk (ft.)4 1 ¼5 1 ½6 1 ¾7 28 2 ¼9 2 ¼10 2 ½11 2 ¾12 313 3 ¼14 3 ½15 3 ¾16 417 4 ¼18 4 ½19 4 ¾20 5Note: When it is absolutely necessary to cut closer than the safe distance from a tree trunk, only cut one side the smallest amount possible. All tree root pruning which is necessary but closer than the safe distance shall be approved by the City CM, City CM Engineer or their representative. Trenching shall be conducted in areas shown on the Plans and in accordance with SECTION 16 of the City Standard Specifications. It is the responsibility of the Contractor to identify the location and elevation of all Utilities that intersect the proposed trench alignment. The alignment as shown on the Plans is schematic and may require adjustment in the field. Hand trenching under curb, gutter, utilities and other permanent facilities will be required. A 1 foot separation is required when crossing any structure or other Utility. Maintain a minimum 50 foot transition on both the approach and departure tapers when deviating from the alignment on the Plans. 31-11.5 Backfill of Conduit Trenches City of Fresno Dept. of Public Works31-14A9 May 2024
All conduit trenches shall be backfilled with a 2 sack colored (red) sand slurry. If conduit trench is located in landscape areas, stop slurry backfill 12 inches below finished grade. The conduit trench shall be completely filled with the 2 sack colored (red) sand slurry. Slurry shall be scraped smooth as to provide an even road surface.For permanent paving, the trench shall be ground to the width and depth shown on the Plans. The 20 inch trench patch shall be centered on the conduit trench. If the edge of the new 20” trench patch is less than or equal to 2 feet (24”) from the lip of gutter or edge of paving, the entire section (from edge of trench patch to lip of gutter) of paving 3 inches deep shall be removed and replaced. Minimum Trench Width – 6 inches Maximum Trench Width – 10 inches Minimum Trench Patch – 20 inches centered on conduit trench Minimum Trench Paving Depth– 3 inches Minimum Trench Paving Width – 18 inches Maximum Trench Paving Width – 42 inches (*) (*) If edge of Trench Patch is less than or equal to 24 inches from lip of curb or edge of paving, grind and replace entire paved area from edge of trench patch to lip of gutter. Special Trench Protection Requirements: All trenches within 3 feet of a 12-foot travel lane or within a pedestrian travel path shall be backfilled with 2 sack (red) sand slurry or trenched plated and opened to vehicular or pedestrian traffic at the end of each working day. Trenches outside of vehicular or pedestrian travel lanes or paths may be appropriately protected and barricaded. See City Standard Specifications and City Standard Drawings for other requirements. 31-12 HORIZONTAL DIRECTIONAL DRILLING 31-12.1 Scope a) General: It is the intent of this Specification to define the acceptable methods and materials for installing high density polyethylene (HDPE) conduit by directional drilling methods. b) Installation Plan 1. Seven (7) Days prior to mobilizing equipment, the Contractor shall submit their detailed installation plan to the City CM, City CM Engineer or their City of Fresno Dept. of Public Works31-15A9 May 2024
representative. The plan shall include a detailed plan and profile of the bores and be plotted at a scale no smaller than 1 inch equals 20 feet horizontal and vertical. 2. The plan shall also include a listing of major equipment and supervisory personnel and a description of the methods to be used. c) Variations in Plan or ProfileThe Contractor may request changes to the proposed vertical and horizontal alignment of the installation and the location of the entry and exit points. Proposed changes shall be submitted in writing to the City CM, City CM Engineer or their representative and receive approval of the City CM, City CM Engineer or their representative prior to construction. d) Alignment The proposed plan and profile installation locations are based on alignments to accommodate acquired easements, to avoid obstructions, and to properly maintain operation flow velocities. e) Qualifications Directional drilling and conduit installation shall be done only by an experienced Contractor specializing in directional drilling and whose key personnel have at least five (5) years experience in this Work. 31-12.2 Materials: a) General High density polyethylene conduit shall be used in HDD installations. All piping system components shall be the products of one manufacturer and shall conform to subsection 31-11 of the City Standard Specifications and the latest edition of ASTM D1248, ASTM D3350, and ASTM F714. b) Piping and Bends: Piping and Bends shall be extruded from a polyethylene compound and shall conform to the following requirements: 1. The polyethylene resin shall meet or exceed the requirements of ASTM D3350 for PE 3408 material with a cell classification of 335434C, or better.
City of Fresno Dept. of Public Works31-16A9 May 2024
2. The polyethylene compound shall be suitably protected against degradation by ultraviolet light by means of carbon black, well dispersed by pre-compounding in a concentration of not less than 2 percent. 3. The maximum allowable hoop stress shall be 800 psi at 73.4 degrees F.4. The conduit manufacturer shall be listed with the Plastic Pipe Institute as meeting the recipe and mixing requirements of the resin manufacturer for the resin used to manufacture the conduit in this project.5. The conduit and bends shall have a minimum standard dimension ratio (SDR) wall thickness as specified by the City CM, City CM Engineer or their representative.6. Joining shall be performed by thermal butt fusion in accordance with the manufacturer’s recommendations.31-12.3 Installationa) General1. The Contractor shall install the conduit by means of horizontal directional drilling. The Contractor shall assemble, support, and pretest the conduit prior to installation in the directional drill tunnel. 2. Horizontal directional drilling shall consist of the drilling of a small diameter pilot hole from one end of the alignment to the other, followed by enlarging the hole diameter for the conduit insertion. The exact method and techniques for completing the directionally drilled installation will be determined by the Contractor, subject to the requirements of these City Standard Specifications. 3. The Contractor shall prepare and submit a plan to the City CM, City CM Engineer or their representative for approval for insertion of the HDPE conduit into the opened bore hole. This plan shall include pullback procedure, ballasting, use of rollers, side booms and side rollers, coating protection, internal cleaning, internal gauging, hydrostatic tests, dewatering, and purging. 4. The required piping shall be assembled in a manner that does not obstruct adjacent roadways or public activities. The Contractor shall erect temporary fencing around the entry and exit conduit staging areas. b) Tolerances City of Fresno Dept. of Public Works31-17A9 May 2024
1. Conduit installed by the directional drilled method must be located in plan as shown on the City Standard Drawings, and must be no shallower than shown on the City Standard Drawings unless otherwise approved. The Contractor shall plot the actual horizontal and vertical alignment of the pilot bore at intervals not exceeding 30 feet. This “As-Built” plan and profile shall be updated as the pilot bore is advanced. The Contractor shall at all times provide and maintain instrumentation that will accurately locate the pilot hole and measure drilling fluid flow and pressure. The Contractor shall grant the City CM, City CM Engineer or their representative access to all data and readout pertaining to the position of the bore head and the fluid pressures and flows. When requested, the Contractor shall provide explanations of this position monitoring and steering equipment. The Contractor shall employ experienced personnel to operate the directional drilling equipment and, in particular, the position monitoring and steering equipment. Information pertaining to the position or inclination of the pilot bores not shall be withheld from the City CM, City CM Engineer or their representative. 2. Each exit point shall be located as shown with an over-length tolerance of 10 feet for directional drills of 1,000 linear feet or less and 40 feet for directional drills of greater than 1,000 linear feet and an alignment tolerance of 5 feet left/right with due consideration of the position of the other exit points and the required permanent easement. c) Ream and Pullback 1. Reaming: Reaming operations shall be conducted to enlarge the pilot after acceptance of the pilot bore. The number and size of such reaming operations shall be conducted at the discretion of the Contractor. 2. Pulling Loads: The maximum allowable pull exerted on the HDPE conduit shall be measured continuously and limited to the maximum allowed by the manufacturer so that the conduit or joints are not over stressed. 3. Torsion and Stresses: A swivel shall be used to connect the conduit to the drill conduit to prevent torsional stresses from occurring in the conduit. 4. The lead end of the conduit shall be closed during the pullback operation. 5. Conduit Support: The conduit shall be equally supported by rollers and side booms and monitored during installation so as to prevent over stressing or buckling during the pullback operation. Such support/rollers shall be spaced at a maximum of 60 feet on centers, and the rollers to be comprised of a non-abrasive material arranged in a manner to provide support to the bottom and bottom quarter points of the conduit allowing for free movement of the conduit during pullback. Surface damage shall be repaired by the Contractor before pulling operations resume.
City of Fresno Dept. of Public Works31-18A9 May 2024
6. The Contractor shall at all times handle the HDPE conduit in a manner that does not over stress the conduit. Vertical and horizontal curves shall be limited so that wall stresses do not exceed 50% of yield stress for flexural bending of the HDPE conduit. If the conduit is buckled or otherwise damaged, the damaged section shall be removed and replaced by the Contractor at its expense. The Contractor shall take appropriate steps during pullback to ensure that the HDPE conduit will be installed without damage. d) Handling Drilling Fluids and Cuttings: 1. During the drilling, reaming, or pullback operations, the Contractor shall make adequate provisions for handling the drilling fluids, or cuttings at the entry and exit pits. To the greatest extent practical, these fluids must not be discharged into the waterway. When the Contractor’s provisions for storage of the fluids or cuttings on Site are exceeded, these materials shall be hauled away to a suitable legal disposal site. The Contractor shall conduct their directional drilling operation in such a manner that drilling fluids are not forced through the subbottom into the waterway. After completion of the directional drilling Work, the entry and exit pit locations shall be restored to original conditions. The Contractor shall comply with all permit provisions. 2. Pits constructed at the entry or exit point area shall be so constructed to completely contain the drill fluid and prevent its escape to the Street. 3. The Contractor shall utilize drilling tools and procedures which will minimize the discharge of any drill fluids. The Contractor shall comply with all mitigation measures listed in the required permits and elsewhere in these Specifications. 4. To the extent practical, the Contractor shall maintain a closed loop drilling fluid system. 5. The Contractor shall minimize drilling fluid disposal quantities by utilizing a drilling fluid cleaning system which allows the returned fluids to be reused.6. As part of the installation plan specified herein before, the Contractor shall submit a drilling fluid plan which details types of drilling fluids, cleaning and recycling equipment, estimated flow rates, and procedures for minimizing drilling fluid escape.31-12.4 Drilling Operationsa) General City of Fresno Dept. of Public Works31-19A9 May 2024
The Contractor shall prepare a plan to be submitted for City CM, City CM Engineer or their representative approval which describes the noise reduction program and solids control plant, pilot hole drilling procedure, the reaming operation, and the pullback procedure. All drilling operations shall be performed by supervisors and personnel experienced in horizontal directional drilling. All required support, including drilling tool suppliers, survey systems, mud cleaning, mud disposal, and other required support systems used during this operation shall be provided by the Contractor. Drill pipe shall be API steel drill pipe, Range 2, Premium Class or higher, Grade S-135 in a diameter sufficient for the torque and longitudinal loads and fluid capacities required for the Work. Only drill pipe inspected under API’s Recommended Practice Specification API RP 7G within 30 Days prior to start and certified as double white band or better shall be used. A smoothly drilled pilot hole shall follow the design centerline of the pipe profile and alignment described on the construction drawings. The position of the drill string shall be monitored by the Contractor with the downhole survey instruments. Contractor shall compute the position in the X, Y and Z axis relative to ground surface from downhole survey data a minimum of once per length of each drilling pipe (approximately 31 foot interval). Deviations from the acceptable tolerances described in the Specifications shall be documented and immediately brought to the attention of the City CM, City CM Engineer or their representative for discussion and/or approval. The profile and alignment defined on the construction drawings for the bores define the minimum depth and radius of curvature. At no point in the drilled profile shall the radius of curvature of the bore be less than 1,600 feet. The Contractor shall maintain and provide to the City CM, City CM Engineer or their representative, upon request, the data generated by the downhole survey tools in a form suitable for independent calculation of the pilot hole profile. Between the water’s edge and the entry or exit point the Contractor shall provide and use a separate steering system employing a ground survey grid system, such as “TRU-TRACKER” or equal wherever possible. The exit point shall fall within a rectangle 10 feet wide and 40 feet long centered on the planned exit point. During the entire operation, waste and leftover drilling fluids from the pits and cuttings shall be dewatered and disposed of in accordance with all permits and regulatory agencies requirements. Remaining water shall be cleaned by Contractor to meet permit requirements. Technical criteria for bentonite shall be as given in API Spec. 13A, Specification for Oil Well Drilling Fluids Material for fresh water drilling fluids. Any modification to the basic drilling fluid involving additives must describe the type of material to be used and be included in Contractor’s drilling plan presented to the City CM, City CM Engineer or their representative.The City retains the right to sample and monitor the waste drilling mud, cuttings and water. b) Environmental Provisions City of Fresno Dept. of Public Works31-20A9 May 2024
The Horizontal Directional Drilling operation is to be operated in a manner to eliminate the discharge of water, drilling mud and cuttings to the adjacent land areas involved during the construction process. The Contractor shall provide equipment and procedures to maximize the recirculation or reuse of drilling mud to minimize waste. All excavated pits used in the drilling operation shall be lined by Contractor with heavy duty plastic sheeting with sealed joints to prevent the migration of drilling fluids and/or ground water. The Contractor shall visit the site and must be aware of all structures and site limitations at the directional drill crossing and provide the City CM, City CM Engineer or their representative with a drilling plan outlining procedures to prevent drilling fluid from adversely affecting the surrounding area. The general Work areas on the entry and exit sides of the crossing shall be enclosed by a berm to contain unplanned spills or discharge. Waste cuttings and drilling mud shall be processed through a solids control plant comprised as a minimum of sumps, pumps, tanks, desalter/desander, centrifuges, material handlers, and haulers all in a quantity sufficient to perform the cleaning/separating operation without interference with the drilling program. The cuttings and excess drilling fluids shall be dewatered and dried by the Contractor to the extent necessary for disposal in offsite landfills. Water from the dewatering process shall be treated by the Contractor to meet permit requirements and disposed of locally. The cuttings and water for disposal are subject to being sampled and tested. The construction Site and adjacent areas will be checked frequently for signs of unplanned leaks or seeps. Equipment (graders, shovels, etc.) and materials (such as groundsheets, hay bales, booms, and absorbent pads) for cleanup and contingencies shall be provided in sufficient quantities by the Contractor and maintained at all Sites for use in the event of inadvertent leaks, seeps or spills. Waste drilling mud and cuttings shall be dewatered, dried, and stock piled such that it can be loaded by a front end loader, transferred to a truck and hauled offsite to a suitable legal disposal site. The maximum allowed water content of these solids is 50% of weight. Due to a limited storage space at the worksites, dewatering and disposal Work shall be concurrent with drilling operations. Treatment of water shall satisfy regulatory agencies before it is discharged.
City of Fresno Dept. of Public Works32-1 A9 May 2024
SECTION 32 – WELL DESTRUCTIONS STANDARDS AND PROCEDURES 32-1 GENERAL This section of the City Standard Specifications is to provide control parameters for the proper destruction of abandoned wells and water related borings, within and under the influence of the City. The proper destruction of wells is the first step to reduce and protect our groundwater supply from contaminants being transferred from surface and subsurface sources. 32-2 STATEMENT OF AUTHORITY 32-2.1 Local: It is the purpose and intent of this section of the City Standard Specifications to describe the requirements for well destructions within the City. All well destruction operations and sealing materials used shall conform to the workmanship and quality of material currently used in the industry and as required herein. 32-2.2 State: All wells destroyed within the jurisdiction of the City shall comply with these City Standard Specifications and shall be in accordance with: a. California Water Code Section 13750.5. b. DWR Bulletin Nos. 74-81 and 74-90. c. State Environmental Protection Agency, Department of Toxic Substances and Control (DTSC), Monitoring Well Design and Construction for Hydrogeologic Characterization Manual, Section 5. d. Water Division standards and special instructions when provided. 32-2.3 Authorized Contractor: a. License Only Contractors holding a current State C-57 Well Driller license are authorized to destroy wells within the City.
City of Fresno Dept. of Public Works32-2A9 May 2024
b. TypesThe licensed Contractor performing the well destruction operation shall provide and coordinate for all materials, equipment, tools, and labor necessary to destroy the following types of wells. See the DWR standards for definitions: 1. Agriculture Supply Wells 2. Domestic Water Supply Wells3. Environmental Extraction and Vapor Wells 4. Environmental Monitoring Wells, (MW) 5. Exploratory Boring, including Direct Push, Related to Water6. Industrial Supply Wells7. Municipal Water Supply Wells 8. Test Wells, (TW) 32-2.4 Inspection The well destruction operation will be subject to inspection by the City’s authorized representative. Overtime inspection fees are charged for all inspections performed on Saturdays, Sundays, City Holidays, and hours worked by the City inspector other than those of the normal City working hours. All inspections fees, including overtime fees, are to be paid and collected in accordance with the existing City Master Fee Schedule, prior to signing off and finalizing any “Well Destruction Permit.”32-3 PRE-DESTRUCTION PREPARATION32-3.1 Equipment and Debris Removal The Contractor shall remove all down-hole pumping equipment and debris from the well, as required pursuant to DWR Bulletin Nos. 74-81 and 74-90 and as directed by the City.32-3.2 Sediment Removal Wells with perforated, slotted, or screened casing, shall have all sediment removed from the well prior to the start of well destruction operations. Alternative methods for the removal of sediment are to be submitted to the Water Division for approval.
City of Fresno Dept. of Public Works32-3A9 May 2024
32-3.3 Casing Destruction The existing casing shall be evaluated to determine the appropriate destruction requirements in conformance with DWR Bulletin Nos. 74-81 and 74-90, DTSC Standards, and these City Standard Specifications. All wells that are a part of a remediation project require a letter of authorization for their destruction from the appropriate lead regulatory agency. Alternative methods for destroying the well casing shall be submitted to the proper agency for approval. The Project Engineer, Project Geologist, or the licensed Contractor shall sign all documentation. The Destruction Authorization Documentation, along with a completed Well Permit Application for well destruction, shall be submitted to the Water Division for approval, prior to the start of the well destruction operation. 32-3.4 Video Record 32-3.4.1 Submission RequirementsThe Contractor shall submit a DVD video of the well, using a down-hole video camera, to the Water Division for review. The video shall clearly record the entire length of the casing and the entire depth of the well. The City will then review each video and specify the method of well destruction. The following information shall be clearly labeled on the disk and recorded on the video: a) Type of Wellb) Address of the Wellc) Owner’s Named) Recording Date e) Well Diameter f) Casing Material g) Dynamic Depth Counter32-3.4.2 Clarity RequirementsThe video of the well shall be such that the condition of the well casing is clearly visible. If the video does not meet this clarity requirement, or if the pump equipment, oil, debris, sediment, and other objects are found in the bottom of the well, the video will be used to establish the pre-removal condition of the well. A new video of the well shall be required to provide visual evidence that all undesired City of Fresno Dept. of Public Works32-4A9 May 2024
material was removed from the well prior to the start of the well destruction operation. 32-3.5 Special Removal and Casing Destruction Inspection A special inspection by the Water Division will be required for all removal and casing destruction operations when the video shows that the pump, oil, sediment, or debris is in the well, or when the well casing must be destroyed. Call (559) 621-5324 to schedule the inspection appointment. All fees for the special inspections are to be paid in accordance to the current City Master Fee Schedule prior to the start of any Work. 32-4 DESTRUCTION APPLICATION REQUIREMENTS32-4.1 Application Documentation Prior to the start of any Well Destruction Operation, the Contractor shall submit the following information to the Water Division for review and approval: a) A Well Destruction Work Plan complying with State and local standardsb) A copy of the existing Well Completion Report (DWR form 188) c) A plot plan delineating the well’s location on Permit Applicationd) A completed Well Permit Application, signed by the owner and Contractor e) Payment of the current permit application fee for well destruction f) A DVD video for wells over 2” in diameterg) A volume calculation of the well casing h) A volume calculation of filter packi) An estimated volume calculation of open bottom j) An estimated volume of required sealing material k) A copy of the “Underground Service Alert” (USA) tag l) A copy of the well destruction Work Plan (MW) m) A copy of State’s well destruction approval documentation (MW) 32-4.2 Permit Application City of Fresno Dept. of Public Works32-5A9 May 2024
All wells destroyed within the City shall require a Well Permit Application for destruction, which must be completed and submitted to the Water Division for review and approval. If the permit is not properly completed it will be returned to the applicant for corrections. Each permit application shall be accompanied with Contractor’s proof of C-57 license. 32-4.3 Volume Calculation 32-4.3.1 Well and Filter Volume The Contractor shall submit a calculation for the estimated volume of the well, including filter pack, and as best practical the estimated volumes of known cavities.32-4.4 Underground Service Alert (USA) An Underground Service Alert (USA) is required prior to the start of the well destruction operations. The City falls under the umbrella of USA-North. Call 811 to order a USA for the property where the well is to be destroyed. 32-5 DESTRUCTION OPERATIONS 32-5.1 Excavation Requirement DWR Bulletin Nos. 74-81 and 74-90 require that the well casing be removed to a depth of five feet within urban areas. 32-5.1.1 Well Accessibility The two typical scenarios of well placement found in the City, which will determine the method of destruction, are described below: 32-5.1.1.1 Open Access Wells, with clear and open access will require excavation and the removal of not less than five linear feet of the well casing below the surrounding surface, or 32-5.1.1.2 Restrictive Access Wells located within a driveway, a patio, or a building, may not require excavation. The well casing shall be cut flush to the existing surface surrounding the well, or as deep as practical. The well shall then be filled to the top of the casing with an approved sealing material, in accordance with these City Standard Specifications.
City of Fresno Dept. of Public Works32-6A9 May 2024
32-5.1.2 Alternative MethodsThe Project Engineer, Project Geologist, or Contractor may submit a signed plan for an alternative method to remove the top five feet of casing to the Water Division for approval. No Work shall proceed until the plan is approved by the Water Division. 32-5.2 Placement of Sealing Material 32-5.2.1 Tremie PipeAll wells with a completion depth of 30 feet or greater, and have a casing of 4 inches in diameter or less, shall require the use of tremie pipe for placing sealing material into the bottom of the well. All wells found to have more than ten feet of water shall require the use of a tremie pipe for placing the sealing material into the bottom of the well. The tremie pipe shall be removed from the well in accordance with DWR Bulletin Nos. 74-81 and 74-90. All tremie pipe shall be made of suitable rigid materials. 32-5.2.2 Failed Sealing Operation Prior to the placement of any sealing material into the well, the well shall be sounded to verify that there has been no significant change in the well depth. If the total volume of the sealing material placed in the well is less than the calculated volume of the well, including the estimated volume of voids in the filter pack, the well destruction operation will be considered to have failed and corrective action shall be required to comply with State codes, or as otherwise directed. 32-5.3 Sealing Materials 32-5.3.1 Submittals Prior to commencing destruction operations, the Contractor shall submit to the Water Division either, a plant mix design, or calibration info with batch mix specification, for review and approval. The Contractor shall provide the Water Division all weight tickets for sealing materials delivered for the well destruction. 32-5.3.2 Sealing Material Design MixturesThe sealing material (cement mixtures) to be used shall conform to one of the following Specifications as defined in the California Water Well Standards of the DWR Bulletin Nos. 74-81 and 74-90.
City of Fresno Dept. of Public Works32-7A9 May 2024
32-5.3.2.1 Sand Cement One 94 lb. sack of type I/II Portland cement and 188 lbs. of sand to 6 gallons of clean water. 32-5.3.2.2 Neat Cement One 94 lbs. sack of type I/II Portland cement to 6 gallons of clean water.32-5.3.2.3 Cement Bentonite: One 94 lb. sack of type I/II Portland cement and 1.88 lbs. bentonite to 8 gallons of water clean. 32-5.4 Pressure Application to Sealing Material 32-5.4.1 Opened Bottom Well Where well casings are found to have cracks, separations, or holes, a sand cement grout shall be placed in the bottom of the well and not more than 5 feet up from the bottom of the casing. Neat cement shall then be placed on top of the sand cement grout and pressurized in accordance with the below requirement.32-5.4.2 Screened Well Wells having louvers, perforations, slots, penetrations, cracks, separations, or holes in the casing walls shall use either sealing mixtures listed in subsection 32-5.3.2. 32-5.4.3 Pressurization of Well After the placement of sealing material into well, by way of a 2” tremie pipe, 50 PSI of pressure shall be applied and maintained to the top of the well, for not less than 15 minutes. The pressure gauge, used to verify that 50 PSI has been attained, shall extend not less than 3 feet above the top of the casing or finished grade. Alternative pressurization application systems shall be submitted for approval not less than 4 Days before the start of the destruction operation, to the Water Division for review and approval. 32-5.5 Inspection Scheduling The Contractor shall call (559) 621-5324 to schedule a well destruction inspection with the Water Division - not less than 48 hours prior to the destruction of any well.
City of Fresno Dept. of Public Works32-8A9 May 2024
Inspections are scheduled by a first-in and first-out system. Some inspections may be scheduled beyond the 48-hour time period. Inspections requested to take place after normal working hours are available at the current overtime rate specified in the City Master Fee Schedule. 32-6 TECHNICAL PROBLEMS The Water Division’s authorized representatives shall evaluate well destructions that pose technical problems outside the scope of these City Standard Specifications. Each well shall be destroyed on a case-by-case basis to ensure compliance to State and local standards. 32-7 FINALIZING PERMITA well permit is finalized, when the City receives a copy of the completed State Well Completion Report (DWR 188 rev.), signed by the Contractor holding the C-57 license and the fulfillment of these guidelines. The Contractor shall deliver to the City a completed Well Completion Report within ten Days of completing the well destruction operations. The Permit will not be finalized until a properly completed DWR Report is received by the Water Division. 32-8 STANDARD REVISIONS AND MODIFICATIONS The City from time to time may modify these City Standard Specifications to meet conditions and regulatory requirements as they change.
City of Fresno Dept. of Public Works33-1A9 May 2024
SECTION 33 – RECYCLED WATER FACILITIES DESIGN CRITERIA PART I - INTRODUCTION 33-1 DEFINITIONS Unless the particular provision or context requires otherwise, the definitions and provisions contained in this section shall govern the construction, meaning, and application of words and phrases used in the conditions in this section. The definition of each word or phrase shall constitute, to the extent applicable, the definition of each word or phrase which is derivative from it, or from which it is a derivative, as the case may be. Compression Joint – A push-on joint that seals by means of the compression of a rubber ring or gasket between the pipe and a bell or coupling. Confined – In areas were the hydraulic grade line is above the soffit of the Storm Drain pipe, only watertight joints are allowed and shall comply with Section 61 of the State Standard Specifications. Easement– A recorded document in which the land owner gives the City permanent rights to construct and maintain recycled water mains and/or facilities across private property. Health Agency – The State Department of Health Services, or the local health officer with respect to a small water system. Mechanical Joint – A joint comprised of pipe spigot, a follower gland (ring), a mechanical joint gasket and the bell of an adjoining pipe, fitting or valve wherein the joint seal is accomplished by tightening a series of bolts and nuts that compress the gasket against the bell recess and the pipe spigot outside diameter. Non-potable Water – Non-potable water is water that may contain objectionable pollution, contamination, minerals, or bacterial agents and is considered unsafe and/or unpalatable for drinking. Pantone – A color standard system referenced in the American Water Works Association California-Nevada Section Guidelines for Distribution of Non-potable water Pressure Class – See definition for “Rated Working Water Pressure”, below. Rated Working Water Pressure – A pipe classification system based upon internal working pressure of fluid in the pipe, type of pipe material, and the thickness of the pipe wall.
City of Fresno Dept. of Public Works33-2A9 May 2024
Recycled Water, Reclaimed Water– Non-potable water that is the treated effluent from a wastewater treatment facility. The terms are identical and any reference to reclaimed water refers to recycled water and vice versa. Restrained Joints – A non-standard or modified push-on or Mechanical Joint that is capable of preventing internal pressures or external forces from causing the joint to separate without the use of thrust blocks. Sleeve – A protective tube of steel with a wall thickness of not less than one fourth inch into which a pipe is inserted. Vertical Separation – The difference in elevation between the outside bottom of the higher pipe and the outside top of the lower pipe. Water Supplier – Any person who owns or operates a public water system. 33-2 OTHER REQUIREMENTS Ordinances, requirements, and applicable standards of governmental agencies having jurisdiction within the area served by the Department of Public Utilities shall be observed in the design and construction of recycled water mains and facilities. Such requirements include, but are not limited to, current revision of the following: 33-2.1 Standard Specifications for Public Works Construction, “latest edition, including all applicable supplements, prepared and promulgated by the California Chapter of the American Public Works Assn. and the Associated General Contractors of America.” 33-2.2 State Health laws and regulations regulating the separation between water supply, recycled water and sewerage facilities. 33-2.3 State Uniform Plumbing code as adopted by the City of Fresno. 33-2.4 Road encroachment regulations of the City of Fresno, County, State of California, Fresno Irrigation District, and railroad permits where applicable. 33-2.5 American Water Works Association Standards 33-2.6 Titles 17 and 22 of the State Health and Safety Code regulating cross connection control and back-flow prevention and Chapter 6 of the City of Fresno Municipal Code, regulating cross connections for the City water system.
City of Fresno Dept. of Public Works33-3A9 May 2024
PART II – GENERAL PROVISIONS33-3 OTHER REQUIREMENTS Ordinances, requirements, and applicable standards of governmental agencies having jurisdiction within the area served by the Department of Public Utilities shall be observed in the design and construction of recycled water mains and facilities. Such requirements include, but are not limited to, current revision of the following:33-3.1 ScopeThe design and construction of recycled water mains, facilities and other appurtenances for the City shall comply with these City Standard Specifications, or permit requirements of various governing bodies, except where specific modifications have been approved by the Engineer, in writing. A tentative plan must be submitted for comment prior to final design. All final Plans submitted by the Developer shall be signed by a registered civil engineer and all Work shall be in accordance with good engineering practice.33-3.2 Standard Criteria The City Standard Specifications set forth the procedure for designing and preparing Plans and Specifications for recycled water mains, facilities and appurtenances to be built within the City’s recycled water service area. These standards shall include the Specifications on design and installation of ductile iron pipe and polyvinyl chloride (PVC) pressure pipe.Whenever potable water, recycled water and sanitary sewer plans are to be designed and installed under one project, said work shall be shown on the same construction plans. In this case the Developer’s engineer shall supply the City the original vellum or mylar for the final record. 33-4 ENFORCEMENTSProvisions of these design and construction standards shall be enforced by the Engineer.PART III – DESIGN CRITERIA 33-5 RECYCLED WATER MAIN PRESSURES, CAPACITIES, AND SIZES 33-5.1 Quantity of Recycled Water Flow Recycled water needs shall be determined from maximum potential population and land use of the area to be served. For design purposes, the design recycled water flow shall equal the peak hour demand. In order to determine the design recycled City of Fresno Dept. of Public Works33-4A9 May 2024
water flow, the following criteria shall be used, unless otherwise approved by the Engineer. 33-5.2 PressureRecycled water mains shall be designed so that service pressures range between 45 and 60 psi. 33-5.3 VelocityRecycled water mains shall be designed such that the mean velocity does not exceed five (5) feet per second under Maximum Daily Demand flow conditions. 33-5.4 Head LossRecycled water mains shall be designed to provide a mean head loss of not more than five (5) feet per thousand feet of pipe under Maximum Daily Demand flow. 33-5.5 Hazen-Williams “C” Pipe analysis shall be performed by assuming a value of 110 for Hazen-Williams co-efficient “C”. 33-5.6 Minimum Recycled Water Main Size Recycled water mains shall have an inside diameter of six (6) inches or more. Four (4) inch mains may be permitted by the Engineer for cul-de-sacs that are 150 feet and shorter when the main serves less than five services. 33-6 LOCATION OF AIR RELEASE VALVE ASSEMBLIES Air release valve assemblies shall be located at all points where air pockets may form and at locations shown and/or established by the Engineer. 33-7 LOCATION OF BLOW-OFF ASSEMBLIES Blow-off assemblies shall be located at low points and dead ends, where sediment may collect. Design class shall be compatible with the pipeline working pressure. 33-8 RECYCLED WATER MAIN LOCATIONS 33-8.1 Recycled Water Main Location in Roads or Streets The centerline of recycled water mains shall be located in public Streets in accordance with Drawings P-41, P-42 and RW-12 of City Standard Drawings. A minimum of four (4) feet of clearance must be maintained between parallel sewer and recycled water City of Fresno Dept. of Public Works33-5A9 May 2024
lines. Recycled water line locations shall be dimensioned from property line and centerline or section line of the street. 33-8.2 Curved Recycled Water Main Requirements In curved streets the recycled water main shall not cross the center line, but shall follow the street curvature using join deflections or fittings or as shown on the drawings. Bending of PVC pipe barrels to accomplish horizontal and vertical curves is not permitted. 33-8.3 Joint Deflection for Curved Recycled Water Main Deflection in joints of pipe shall be as limited by manufacturers recommendation.33-8.4 Elbows Elbow shall be placed at locations where coupling deflection would exceed the allowable, as limited by manufacturer’s recommendation. 33-8.5 Recycled Water-Water-Sewer Separation The provisions of State Health Codes shall be met in locating recycled water mains. 33-9 CRITERIA FOR THE SEPARATION 33-9.1 Basic Separation Standards The “California Waterworks Standards” set forth the minimum separation requirements for recycled water and water main lines. These Standards, contained in Title 22 California Code of Regulations 64572 specify: a) Parallel Construction: The horizontal distance between pressure water mains, recycled water lines and sewer lines shall be at least 4 feet.b) Perpendicular Construction (crossing): Pressure water mains shall be at least one foot above sanitary sewer and recycled water lines where these lines must cross.c) Separation distances specified in a) shall be measured from the nearest edges of the facilities.d) Common Trench:Water mains and recycled water lines must not be installed in the same trench. When water and recycled water mains are not adequately separated, the City of Fresno Dept. of Public Works33-6A9 May 2024
potential for contamination of the water main supply increases. Therefore, when adequate physical separation cannot be attained, an increase in the factor of safety shall be provided by increasing the structural integrity of both the pipe materials and joints. 33-9.2 Basic Separation Standards Local conditions such as available space, limited slope, existing structure, etc., may create a situation where there is no alternative but to install water mains or recycled water lines at a distance less than required by the Basic Separation Standards. In such cases, alternative construction criteria may be allowed in very special circumstances. Detail shall be submitted to City Engineer and Health Agency for approval prior to construction. Water mains and supply lines of 24” diameter or greater may create special hazards because of the large volumes of flow. Therefore, installations of water mains and supply lines 24 inches diameter or larger shall be reviewed and approved by the Health Agency and City Engineer prior to construction. 33-9.3 Special Provisions The Basic Separation Standards are applicable under normal conditions for recycled lines and water distribution mains. More stringent requirements may be necessary if conditions, such as, high groundwater exist. New recycled water mains and sewers shall be pressure tested where the conduits are located ten feet apart or less. In the installation of recycled water or water mains, measures shall be taken to prevent or minimize disturbances of the existing line. Disturbance of the supporting base of this line could eventually result in failure of this existing pipe. Special consideration shall be given to the selection of pipe materials if corrosive conditions are likely to exist. These conditions may be due to soil type and/or the nature of the fluid conveyed in the conduit. 33-10 ALTERNATE CRITERIA FOR CONSTRUCTION When new water mains, new sanitary sewer mains, or other non-potable fluid-carrying pipeline are being installed in existing developed areas, local conditions (e.g., available space, limited slope, existing structures) may create a situation in which there is no alternative but to install water mains, sanitary sewer mains, or other non-potable pipelines at a distance less than that is required by the regulations (Section 64572). In such cases, through permit action, the State Water Resources Control Board may approve alternate construction criteria. The alternate approval is allowed under Title 22 California Code of Regulations, Section 64551.100.
City of Fresno Dept. of Public Works33-7A9 May 2024
33-11 PROCEDURE FOR WATER, RECYCLED WATER AND SEWER SYSTEM INSTALLATIONS IN SUBDIVISIONS a. Installation of all sewer mains, laterals and manholes and backfill. b. Installation of all recycled water mains, services and backfill. c. Installation of all water mains, services and backfill d. Compact all Sewer trenches. 1. Make preliminary pretty test. (Optional) 2. Locate and repair leaks, if any.3. Recompact if necessary. e. Compact all recycled water trenches. 1. Make preliminary pressure test. (Optional)2. Locate and repair leaks, if any.3. Recompact if necessary. f. Compact all water trenches. 1. Make preliminary pressure test. (Optional)2. Locate and repair leaks, if any.3. Recompact if necessary. g. Items (d), (e) and (f) may be done simultaneously if conditions permit.h. All trenches shall be identified. Contractor shall also locate and mark Sewer, Water and Recycled water service laterals on curb face when constructed. i. Compaction tests on sewer, water and recycled water taken by City. j. Final air test for sewer and pressure test for water and recycled water, providing all leaks are repaired all compaction tests have been approved. k. Any failure of final tests would require Contractor to reinitiate sequence of work starting with Item (i).
City of Fresno Dept. of Public Works33-8A9 May 2024
l. The Department of Public Utilities will construct the wet tie to connect to the City’s system. This will allow the Contractor to sterilize and flush the newly constructed system. There is often an associated charge for the construction of these wet ties.m. Flushing recycled water mains shall not be allowed in Street area if it conflicts with sewer and water installations. Often done after compaction tests have passed.Water seeps into trenches and holds up Developer’s paving while Street dries out.n. If storm sewers are to be installed, they shall be constructed first, unless otherwise directed.33-12 EASEMENTS Non-metallic pipes may be allowed in Easements which are neither confined or interior Easements.33-12.1 Easements The minimum width of a recycled water facility Easement shall be approved by the Engineer.33-12.2 Recycled Water Main Location in Easement The recycled water main shall be located 5 feet north or west of the center line of the Easement except where otherwise approved by the Engineer. 33-12.3 Where Easements Follow Common Lot Lines The full Easement width shall be on one lot, in such a manner that access to lines will not be obstructed by walls, trees, or permanent improvements. Where this requirement cannot be met without interfering with existing buildings, easements may straddle lot lines, but the recycled water line shall not be located on the lot lines. 33-12.4 Deeds for Easements Deeds for Easements shall provide for restrictions of permanent construction within the Easement to provide ingress and egress for maintenance. A recent title report will be required prior to acceptance of the Easement. 33-12.5 DedicationsDedications shall be in accordance with City standard practice.a) For subdivision tracts the owners of land included within the subdivision shall provide a bill of sale on a form provided by the City. This bill of sale shall be a part of the acceptance of the subdivision.
City of Fresno Dept. of Public Works33-9A9 May 2024
b) For other than subdivision tracts, the following shall be conveyed to the City: 1. A deed of Easement satisfactory to the City for the operation maintenance of the recycled water facilities shall be prepared by a registered engineer or land surveyor, on City Easement forms properly executed by the owners;2. A bill of sale to the City for the recycled water mains and appurtenances.33-13 DEPTH OF RECYCLED WATER MAINS33-13.1 Basic Requirements Recycled water mains shall be installed at a depth which shall be in accordance with the applicable ordinances, regulating the separation between water supply and sewerage facilities. 33-13.2 Standard Depths Minimum depth shall be 42 inches to top of pipe measured from Street or surface above the pipe. Where the natural ground above the pipeline trench has been over-excavated and/or the pipeline is to be placed in the new embankment, embankment material shall be placed and compacted to an elevation of not less than 3 feet above the top of pipe prior to the trench excavation. Where 42 inches from top of curb cannot be maintained, pipe shall be installed with selected or imported bedding as approved by the Engineer or metallic pipe material shall be used. 33-13.3 Exceptions Designs not in accordance with City Standard Drawing No. RW-12 shall be submitted to the Engineer for approval together with evidence that it complies with City Standard Drawing No. RW-12.33-14 STRUCTURAL REQUIREMENTS33-14.1 Buried Facilities All structures and pipe placed underground shall be of sufficient strength to support with an adequate factor of safety the following applicable loads: the backfill, road surfacing, H-20 truck loading with impact, high loading to be specified by the Engineer or as required by permits for crossing State highways, railroad tracks, canals, and streams. Calculations showing factor of safety may be required by the Engineer. 33-14.2 Other Pipes and Structures City of Fresno Dept. of Public Works33-10A9 May 2024
Recycled water lines designed to cross under other pipes or structures shall be protected from damage and shall be constructed in order not to endanger the other pipe or structure. Minimum clearance between outside of pipes or between pipes and other structures is 12 inches unless otherwise approved by the Engineer. 33-14.3 Flexible Joints Flexible joints which will allow for differential settlements or other movement of recycled water pipe, facilities, adjacent pipe and adjacent structures shall be provided where recycled water lines enter encasements or other structures. Flexible joints shall be within three feet of such structures. Any deviations from these requirements shall require approval from the Engineer. 33-14.4 Thrust Blocks The use of concrete thrust blocks may be required but will only be allowed when specifically approved in writing by the Engineer. 33-14.5 Mechanical Restrained Joints Restrained Joint fittings shall be provided at all tees, crosses, reducers, bends, caps, plugs and valves such that the pipe is fully restrained in any one given direction. These shall meet Uni-B-13 and ASTM F 1674-96 for PVC and be UL/FM approved through 12" for both ductile iron and PVC. The restraint mechanism shall consist of individually activated gripping surfaces to maximize restraint capability. Twist-off nuts, sized the same as the tee-head bolts, shall be used to ensure proper activating of restraining devices. The gland shall be manufactured of ductile iron conforming to ASTM A536-80. The retainer-gland shall have a pressure rating equal to that of the pipe on which it is used through 14" with a minimum safety factor of 2:1. See City Standard Drawings W-31, W-32, W-33, W-34, W-35, W-36 and W-37. Gland shall be Megalug by EBAA Iron, Inc., Uni-Flange by Ford Meter Box Co. Inc., or approved equal. Push-on Restraint: When it is necessary to restrain push-on joints adjacent to restrained fittings, a harness restraint device shall be used. All harnesses shall have a pressure rating equal to that of the pipe on which it is used through 14". Harness assemblies including tie bolts shall be manufactured of ductile iron conforming to ASTM A536-80. Harness shall be manufactured by EBAA Iron, Inc., Ford Meter Box Co. Inc., or approved equal. 33-15 DESIGN CRITERIA FOR RECYCLED WATER METERS The City shall determine the appropriate meter sizes and types, based on the building plumbing plans and the landscape sprinkler plans furnished by the Developer. PART IV – MATERIALS City of Fresno Dept. of Public Works33-11A9 May 2024
33-16 REQUIREMENTSMaterials shall be chosen for their strength, durability and ease of maintenance, with due consideration for dead and live loads, beam strength and resistance to corrosion. Pipe joints shall be selected to provide sufficient flexibility to adjust to the residual conditions during and after construction.33-17 PIPE MATERIALSThe following are acceptable materials for recycled water line construction: 33-17.1 Ductile Iron Pipe and Ductile Iron Fittings Ductile iron pipe and associated fittings shall conform to the applicable sections of the City Standard Specifications. a) Fabrication Ductile iron pipe shall be Pressure Class 350 ductile iron for sizes up to and including 12 inch and Pressure Class 250 ductile iron from 14 inch to 20 inch; complete with all accessories and conforming to ANSI/AWWA C151/A21.51, unless otherwise indicated on the construction plans. Ductile iron pipe shall be eighteen (18) foot laying lengths. b) JointsJoining of ductile iron pipe shall be with elastomeric-gasket bell ends or couplings. The joints and rubber gaskets shall be in conformance with ANSI/AWWA C111/A21.11. c) Inspection and Testing City at its discretion may inspect the plant facilities, materials, manufacture and testing of the pipe to be furnished by Contractor. Testing of the pipe to ensure compliance with these Specifications shall be made in accordance with applicable AWWA Standards latest edition. All cost incurred by City for witnessing the manufacture of the pipe and in obtaining test results shall be borne by Contractor furnishing the pipe. d) Affidavit of Compliance City may elect to waive any of the above testing and inspection requirements in which event the Engineer may require the manufacturer to submit affidavits stating that all pipe has been manufactured and tested in accordance with this Specification.
City of Fresno Dept. of Public Works33-12A9 May 2024
e) FittingsAll fittings for use with ductile iron pipe shall be ductile iron manufactured in accordance with ANSI/AWWA C110/A21.10 or ANSI/AWWA C153/A21.53. All Mechanical Joint or push-on joint fittings shall be rated for 350 psi working pressure in sizes 4" through 24". Flange fittings shall be rated for 250 psi working pressure. Flange drilling pattern shall be in accordance with ANSI/AWWA C110/A21.10, or commonly referred to as a 125# drilling pattern.In accordance with Section 4.4 of ANSI/AWWA C153/A21.53, fittings may be provided with a cement-mortar lining and asphalt coating or fusion bonded epoxy inside and outside. Fusion bonded epoxy shall be in accordance with ANSI/AWWA C116/A21.16 and shall be applied to interior and exterior surfaces. All tees and crosses shall have all flanged ends with the exception of blowoff, and pumping connections, which shall have flange by Mechanical Joint or push-on joint ends; reducers shall have flange by Mechanical Joint ends; elbows maybe either Mechanical Joint or flanged ends. f) Appurtenances All appurtenances used in conjunction with the ductile iron pipe shall meet the City Standard Specifications. g) Lining and Coating Unless otherwise approved, the internal surface shall be lined with a uniform thickness of cement mortar and then sealed with a thin asphaltic coating in accordance to AWWA C104. h) Encasement The outside surface shall be protected with purple polyethylene encasement furnished and installed in accordance with AWWA C105. i) Marking/Identification Ductile iron pipe shall be identified and marked in accordance to City Standard Drawing RW-1. 33-17.1.1 Confined Easements All confined easement construction shall be ductile iron.
City of Fresno Dept. of Public Works33-13A9 May 2024
33-17.2 Polyvinyl Chloride (PVC) Pressure PipePolyvinyl chloride (PVC) pressure pipe shall conform to the applicable sections of the City Standard Specifications. a) Fabrication Polyvinyl chloride pressure pipe shall be purple in color, or be installed in a purple sleeve marked “RECLAIMED WATER –DO NOT DRINK” the entire length of the pipeline, shall conform to AWWA C-900-16 latest edition for 4” to 60”, unless otherwise indicated on the construction Plans. b) Joints Joining of PVC pipe shall be with elastomeric-gasket bell ends or couplings.The bell ends shall be an integral thickened bell end (IB) or an integral Sleeve-reinforced bell end. The bell end joints shall have a minimum wall thickness of the bell or Sleeve-reinforced bell equal, at all points, to the DR Requirements for the pipe. The minimum wall thickness in the ring groove and bell-entry sections shall equal or exceed the minimum wall thickness of the pipe barrel. If bell ends are not part of the pipe, one PVC coupling, manufactured of the same material and by the same manufacturer as the pipe, shall be furnished with each length of pipe together with two (2) rubber rings. The coupling shall be designed to ensure a water-tight joint with the pipe. The coupling body and socket shall have a wall thickness equal to the pipe barrel thickness with which the coupling is to be used. All rubber rings shall be furnished by the pipe manufacturer. These rubber rings (Elastomeric Gaskets) shall be manufactured to conform with the requirements of ASTM F-477. c) Hydrostatic Proof-test Each length of pipe shall be proof-tested at two (2) times its rated Pressure Class for a minimum dwell of five (5) seconds, in accordance with AWWA C605 and C900. d) Inspection and Testing The City, at its discretion, may inspect the plant facilities, materials, manufacture and testing of the pipe to be furnished by Contractor. Testing of the pipe to ensure compliance with these Specifications shall be made in accordance with applicable AWWA Standards latest edition. All cost City of Fresno Dept. of Public Works33-14A9 May 2024
incurred by City for witnessing the manufacture of the pipe and in obtaining test results shall be borne by Contractor furnishing the pipe. e) Affidavit of Compliance City may elect to waive any of the above testing and inspection requirements in which event the Engineer may require the manufacturer to submit affidavits stating that all pipe has been manufactured and tested in accordance with this Specification. f) FittingsAll fittings for use with Polyvinyl chloride pipe shall be ductile iron manufactured in accordance with ANSI/AWWA C110/A21.10 or ANSI/AWWA C153/A21.53.All Mechanical Joint or push-on joint fittings shall be rated for 350 psi working pressure in sizes 4" through 24". Flange fittings shall be rated for 250 psi working pressure. Flange drilling pattern shall be in accordance with ANSI/AWWA C110/A21.10, or commonly referred to as a 125# drilling pattern.In accordance with Section 4.4 of ANSI/AWWA C153/A21.53, fittings may be provided with a cement-mortar lining and asphalt coating or fusion bonded epoxy inside and outside. Fusion bonded epoxy shall be in accordance with ANSI/AWWA C116/A21.16 and shall be applied to interior and exterior surfaces. All tees and crosses shall have all flanged ends with the exception of blow-off, and pumping connections, which shall have flange by Mechanical Joint or push-on joint ends; reducers shall have flange by Mechanical Joint ends; elbows maybe either Mechanical Joint or flanged ends. A/C to C.I.O.D. (PVC adapter rings may not be used).g) AppurtenancesAll appurtenances used in conjunction with PVC shall meet the City Standard Specifications. h) Detachable Ribbon or Tapes Because PVC is non-conductive and subject to more damage if struck with excavation equipment, an identification marking tape shall be installed in accordance to City Standard Drawing No. RW-1. 33-18 VALVES 33-18.1 Butterfly Valves City of Fresno Dept. of Public Works33-15A9 May 2024
a. GeneralThese Specifications designate the requirements for the manufacture and installation of butterfly valves. The Contractor shall furnish all labor, materials, tools and equipment necessary to install, complete and ready for operation, the valves as shown on the Plans and herein specified.b. Materials and Workmanship Butterfly valves shall be of the rubber-seated tight-closing type. They shall meet or exceed AWWA Standard C504 latest revision. All valves must use full AWWA C504 Class 150B valve shaft diameter, and full Class 150B underground-service-operator torque rating throughout entire travel. All valves shall be NSF approved. Valve body shall be high-strength cast iron ASTM A126 Class B with 18-8 Type 304 stainless steel body seat. Valve vane shall be high-strength cast iron ASTM A48 Class 40, having rubber seat mechanically secured with an integral 18-8 stainless steel clamp ring and 18-8 stainless steel self-locked screws. Rubber seat shall be full-circle 360 degree seat not penetrated by the valve shaft. Valve shaft shall be one piece, extending full size through the entire valve. Valve shaft shall be 304 stainless steel. Packing shall be O-ring cartridge designed for permanent duty underground. All exposed cap screws and fasteners on the valve body and flanges shall be Ni-Cad steel or approved equal. c. Valve Operations Valve operators shall be of the manual type. The operator shall be totally enclosed, self-locking worm gear or screw type, with adjustable stops to limit disc travel. The number of complete turns of the operator required to rotate this disc 90 degrees shall be approximately the same as an equivalent sized gate valve. All valve operators shall be fully gasketed, weather-proof and factory packed with grease. Operators shall be of the size required for opening and closing the valve against 150 psi water pressure, and shall have a torque rating of not less than shown in AWWA C-504, 1, Class 150-B. Operators for valves located above ground shall have disc-position indicators and a hand-wheel. Should the difference between the operating nut and the valve cover exceed 50 inches, an extension mast shall be installed so that the operating nut will not exceed 50 inches from the valve cover or ground surface. Buried operators shall be worm gear or screw type and shall be threaded to accommodate a two inch operating nut, and shall include the operating nut, and a 3/4" hex head plated bolt for operating nut hold-down. All exposed fastenings shall be specifically designed and suitable for permanent buried service. Input shaft and thread for the operating nut shall be at a right angle to the operating shaft. The City of Fresno Dept. of Public Works33-16A9 May 2024
input shaft shall extend vertically from the side when the valve is in the horizontal position.Epoxy shall be applied to all surfaces of valve body and vane to an average minimum thickness of 5 mils, conforming to AWWA C 550 Standards. A primer shall be applied before the coating per the epoxy manufacturer’s recommendations. The coating shall be applied to the entire valve body and vane before final assembly.d. Valve EndsValve ends shall be for Flanged Joint pipe and shall conform to ANSI CIII (AWWA A21.11, Class 125) and drilled to ANSI B16.1 for cast iron flanges and flanged fittings, Class 125. Flanges shall be 125# ANSI. The butterfly valves shall be right closing Class 150-B designed for tight shut off with a maximum differential pressure across the disc of 200 psi. Valve shafts shall consist of a one-piece unit extending completely through the valve disc. e. Valve Boxes, Nuts and Bolts, Gaskets and Marker Posts shall conform to the provisions specified herein for gate valves. f. Marking/Identification Install an identification tag in accordance to City Standard Drawing RW-18. 33-18.2 Gate Valves a. General These Specifications designate the requirements for the manufacture and installation of gate valves. The Contractor shall furnish all labor, materials, tools and equipment necessary to install, complete and ready for operation, the valves as shown on the Plans and herein specified. b. Materials and Workmanship Gate valves shall be non-rising stem resilient seated type. Valves shall conform to the latest version of AWWA C-509. Valve bodies shall be ductile iron and wedges shall be fully rubber encapsulated. The stem shall have two O-rings above the collar and one O-ring below the collar. Stem seals must be replaceable with the valve under pressure. The stem material shall be stainless steel [ANSI-420], low zinc bronze or manganese bronze. The waterway shall be full size. No cavities or depressions are permitted in the seat area. Valve body and bonnet shall be electrostatically applied, fusion bonded, epoxy coated both inside and out by the valve City of Fresno Dept. of Public Works33-17A9 May 2024
manufacturer. The coating shall meet the requirements of AWWA C-550 and NSF 61 approved. All valve body and bonnets bolts and nuts shall be type 304 stainless steel. All valves must be tested by hydrostatic pressure equal to the requirements in the AWWA C-509 specifications prior to shipment. Tapping gate valve assemblies shall be used only in conjunction with tapping Sleeves and shall be furnished and installed by the Department of Public Utilities. Nuts and bolts used for bolting flanged-end gate valves to pipeline flanges above ground, shall be hexagonal head machine bolts and hexagonal nuts conforming to ASTM A307, Grade B. All buried flanged-end gate valves shall be bolted to the pipe line flanges with Ni-Cad nuts and bolts or approved equal.c. Gaskets Gaskets for flanged-end gate valves shall be right face 1/8”. d. Valve EndsValves may be provided with Mechanical Joint ends, push-on joint ends, flanged ends, Mechanical Joint by flange ends or push-on joint by flange ends.e. Marking/Identification Install an identification tag in accordance to City Standard Drawing RW-18.33-19 APPURTENANCES 33-19.1 Blow-off Assemblies for Recycled Water Mains a) General Blow-off assemblies shall be furnished and installed by the Contractor at the locations shown on the Plans. The Contractor shall furnish all labor, materials, tools and equipment necessary to furnish and install, complete and ready for operation, the assemblies as shown on the plans and herein specified. See City Standard Drawings RW-7 and RW-8A and RW-8B. b) Materials, Fabrication and Installation 1. Materials: Shall be ductile iron and sized as designated on the City Standard Drawings. RW-7 and RW-8A and RW-8B or on the Plans.
City of Fresno Dept. of Public Works33-18A9 May 2024
2. Valves: Gate valves or butterfly valves for blow-off assemblies shall be as specified herein.3. Pipes and Fittings: Shall be 6 inch or 8 inch ductile iron and shall conform with the standard for ductile iron pipe water main and fittings. Joints on the recycled water main side of the gate valves shall be flanged. Properly restrained MJ fittings are allowed downstream of the gate valve. 4. Pipe Sleeves and Lids: Shall be used per City Standard Drawing RW-2.5. Boxes and Lids: Shall be per City Standard Drawings RW-7 and RW-8 or Engineer approved equivalent and marked “Recycled Water”. Covers shall be seated flush with the surface of the natural ground or paved surface, such that they may not be damaged by, nor present an obstruction or rough surface to traffic. 33-19.2 Air Release Valve Assemblies a) GeneralAir release valve assemblies shall be furnished and installed by the Contractor at all points where air pockets may form and at the locations shown and/or established in the field by the Engineer. The Contractor shall furnish all labor, materials, tools and equipment necessary to install, complete and ready for operation, the valve assemblies shown on the plans and herein specified. See City Standard Drawing No. RW-9, RW-10, and RW-26. b) Materials, Fabrication and Installation Materials shall be in accordance with City Standard Drawings. The valve shall be a Vent-o-Mat RBX series, Vent- Tech or approved equal. 33-19.3 Recycled Water Service Assemblies (2 inches and smaller) a) General Recycled water service assemblies shall be furnished and installed by the Contractor at the locations shown on Plans or established in the field by the Developer. The Contractor shall furnish all labor, materials, tools and equipment necessary to install, complete and ready for operation, the assemblies as shown on the Plans and herein specified. The Contractor shall perform the installation of the lot services in accordance with the City Standard Drawing Nos. RW-4 and RW-5. The Developer shall provide the City with a Plan showing the “As Built” location of all services. b) Materials, Fabrication and Installation City of Fresno Dept. of Public Works33-19A9 May 2024
1. Materials: Shall be those designated on the City Standard Drawings RW-4 and RW-5 2. Pipe and Fittings: Service pipe shall be Type K soft copper tubing, or Polyethylene CTS 200 psi SDR-9 PE 3408. Solder fittings shall be soldered with 95% tin / 5% lead or silver solder (pure). 3. Saddles: Service saddles shall be used for all 1", 1-1/2", and 2" taps made on ductile iron and PVC pipe. A circumferential type stainless steel band or bands shaped to fit the actual O.D. of the pipe shall be used. Double strap bands shall provide a minimum bearing width of 1-1/2 inches per band along the axis of the pipe. Single strap bands shall provide a minimum bearing width of 3 inches per band along the axis of the pipe. Saddles shall not have lugs that will cut into the pipe when the saddle is tightened. Saddles are to be Jones, Ford, Mueller or approved equal.Multiple O.D. range saddles shall not be used. 4. Service Taps: In no case shall a service tap be made in a main closer than 18 inches to a bell coupling joint, or fitting. Service taps shall not be less than two feet apart. Service taps shall be located opposite the service locations so that the service laterals will be perpendicular to the Street centerline. Service tap locations varying more than two feet from the perpendicular must be approved by the Engineer prior to installation.Service taps shall be in accordance with City Standard Drawing Nos. RW-4 and RW-5. Where dissimilar metals are joined, a dielectric connection, approved by the Engineer shall be provided. Hole size drilled in the pipe shall be the same size as the corporation stop. The cutting tool shall be muller cutting type (hole) cutter which will retain the coupon.Tapping Sleeves and corporation stop valves shall be used for service connections of 2 inches and smaller. For ductile iron recycled water mains, double strap ductile iron service saddles must be used.5. Service Boxes Service Size Corp. StopService Pipe Angle Meter Stop1” 1” 1” 1”1 ½” 1 ½” 1 ½” 2” 2” 2” City of Fresno Dept. of Public Works33-20A9 May 2024
Service casing and covers and meter boxes and covers shall be furnished and installed by the Contractor as shown of City Standard Drawings RW-4 and RW-5. All service casings shall be complete and in place at the time of acceptance of the subdivision. All services shall be marked by an “RW” clearly visible on the curb face. Minimum size 1 ½” X 1 ½ “ maximum 3" X 3". 6. Curb Stops in Driveway No services in driveway approaches allowed. 7. Encasement and Identification Due to the corrosive nature of soils, a protective polyethylene sleeve shall be installed over the copper service line on all sizes from 1” to 2”. It must be purple in color, to immediately identify it as non-potable service, and shall encase the service line from the corp stop to the angle meter stop in one continuous piece. It shall be attached to both the corp and the angle meter stop by using PVC tape, duct tape, or other suitable adhesive tape. 33-19.4 Valve Service Casing and Lid Valve Service Casing and Lid Shall conform with City Standard Drawing RW-2. Covers shall be seated flush with the surface of the natural ground or paved surface such that they may not be damaged by, or present an obstruction or rough surface to traffic. Covers shall have a 9 inch wide and 6 inch thick stabilizing concrete ring constructed when the valve is outside the pavement area. Covers must be painted purple by using Pantone 512.
City of Fresno Dept. of Public Works34-1A9 May 2024
SECTION 34–RECYCLED WATER FACILITIES 34-1 SCOPEThese City Standard Specifications are intended to describe the execution and workmanship to be used in construction of a recycled water system operated in the City of Fresno. It is presumed that the Developer or his/her engineer has prepared such general and special Specifications as are necessary to define the nature and location of the Work, contractual arrangements, payment for Work, and any other matters concerning the owner or his/her Contractor. All Street work permits shall be obtained and fees shall be paid by the Developer or Contractor. 34-2 GENERAL 34-2.1 Quality Control of Materials The quality control of materials shall conform to the applicable sections of the City Standard Specifications as published by the City of Fresno. 34-2.2 Quality of Workmanship All Work will be done by Persons experienced in the specific Work, under competent supervision and in a first class manner to the Engineer’s complete satisfaction. Every precaution shall be taken to prevent foreign material from entering the pipe while it is being placed in the trench. If the pipe-laying crew cannot put the pipe into the trench and in place without getting earth into it, the Engineer may require that before lowering the pipe into the trench a heavy tightly woven burlap bag of suitable size shall be placed over each end and left there until the connection is to be made to the adjacent pipe. During laying operations, no debris, tools, clothing or other materials shall be placed in the pipe. After placing a length of pipe in the trench and completing the jointing operation, in a method approved by the pipe manufacturer, the pipe shall be secured in place with approved backfill material placed under it. At times when pipe laying is not in progress, the open ends of the pipe shall be closed by a watertight plug or other means approved by the Engineer. This provision shall apply during any Work stoppage. 34-2.3 Connections to Existing Facilities Connections shall be performed by Wastewater Division personnel only. One week notice shall be given before any connection is to be made. 34-2.4 Defective Work Any defective materials or workmanship which becomes evident within one year after the City assumes responsibility for the completed Work shall be replaced or repaired without cost to the City. Refusal of the Contractor to correct defective Work which is City of Fresno Dept. of Public Works34-2A9 May 2024
his/her responsibility will be considered just cause for excluding him/her from performing future Work to be connected to the City’s system. Such exclusion does not impair the City’s right to bring legal action to correct the deficiencies. 34-2.5 Construction Staking and “Record-Drawings” Construction stakes will be set parallel to the recycled water main alignment at an offset distance and direction agreed upon with the Contractor but in no case shall construction stakes be offset more than 10 feet. Stakes will be set at no greater interval than 100 feet on straight alignments. For horizontally or vertically curved recycled water mains, the stake intervals shall be 25 feet. For all Street recycled water mains, regardless of alignment or slope, the Developer’s engineers shall determine “Record-Drawings” elevations at the top of pipe centerline at each change in pipe grade and shall provide a written record of such elevations to the inspector. The Developer’s engineer shall also provide “Record-Drawings” of all main line valve locations and all service stop locations. 34-3 POLYVINYL CHLORIDE (PVC) PRESSURE PIPE AND FITTINGS INSTALLATION 34-3.1 Scope of Work The Contractor performing the Work under this Specification shall furnish all labor tools and equipment, which are necessary to install, complete, and ready for operation, the PVC pressure pipe recycled water mains as herein specified and/or as indicated on the contract drawings. 34-3.2 Installation Installation shall conform to Chapter 7, Installation, of AWWA Standard C605 and AWWA Manual M23. Bending of PVC pipe barrels to accomplish horizontal or vertical curves is not permitted. 34-3.3 Tracer Wire with Marking Tape Tracer wire used with PVC where called for on the Plans shall be copper wire, Type TW, Size AWG #10 and shall be placed above the PVC recycled water main. Recycled water marking tape shall be purple (Pantone 512) and shall be a minimum of six inches wide and placed twelve inches above the pipeline. See City Standard Drawing No.’s RW-1 and RW-24.
City of Fresno Dept. of Public Works34-3 A9 May 2024
34-4 DUCTILE IRON PRESSURE PIPE AND FITTINGS INSTALLATION34-4.1 Scope of Work The Contractor performing the Work under this Specification shall furnish all labor tools and equipment, which are necessary to install, complete, and ready for operation, the ductile iron pressure pipe recycled water mains as herein specified and/or as indicated on the contract drawings. 34-4.2 Installation Installation shall conform to AWWA C-600 and Installation of Ductile Iron Pipe and Fittings in AWWA Manual M41. 34-5 VALVE CASING AND LID INSTALLATION When recycled water mains are installed, casings and lids in Street areas shall be installed in a lowered position below any sub-grade which may be removed or re-compacted. When sub-grade is compacted and base material installed and completed, casing and lids shall be completed in accordance with City Standard Drawing Nos. RW-2, “Recycled Water Valve and Valve Box,” and RW-16, “ Recycled Water Irrigation Box Cover Markings”. Valves located in the sidewalk shall be marked with a 2" X 4" stake so that casings and lids may be brought to finished grade at the time concrete is poured. Any excavation necessary for valve casing and lid work shall be thoroughly re-compacted to the satisfaction of the Engineer. All casings shall be installed in a vertical position. All valve operating nuts shall be free of any dirt or debris and all valves shall be checked to ensure that they are left in a wide open position. It shall be the responsibility of the Contractor to do this Work exactly as specified.34-6 EARTHWORK FOR DUCTILE IRON AND PVC PIPE INSTALLATION 34-6.1 General This Work shall consist of all excavation and backfill necessary for the construction of pipelines, structures and other facilities, and the restoration of surfaces disturbed by such Work, all as set forth in the Plans and Specifications and as directed by the Engineer.Excavations for appurtenance structures, such as blow-offs, hydrant runs, vaults, valves, etc., shall be deemed to be in the category of trench excavation.
City of Fresno Dept. of Public Works34-4A9 May 2024
34-6.2 Trench and Structure ExcavationExcavations shall be made to the depths and widths required accommodating construction of conduits and structures to specified dimensions and to the lines and grades indicated on the Plans. Unless otherwise indicated on the Plans, excavations for pipe construction may be open cut. The Contractor shall be responsible for locating and protecting subsurface obstructions in the field, and shall notify the Engineer immediately if conflicts occur.Reference is made to SECTION 5 of these City Standard Specifications relative to existing Utilities, and the protection thereof. The location of subsurface obstructions found in the field may necessitate a variance in the depth or alignment of proposed facilities. The Contractor shall perform all excavations in accordance with the Trench Construction Safety Orders issued by the Division of Industrial Safety of the Department of Industrial Relations of the State of California. When a trench or structure Site is to be located in an existing oiled earth or pavement area, the existing surfacing to be removed shall be cut by methods approved by the Engineer along neat lines on each side of the trench or around the structure Site. Existing surfacing, when removed, shall be kept separated from the material that is to be returned to the excavation. Failure to comply with this requirement shall be grounds for rejection of the contained material for use as backfill. Material excavated from the trench shall be placed so as to offer minimum obstructions to traffic. All existing gas pipes, water pipes, conduits, Sewers, drains, fire hydrants, and other structures which are not, in the opinion of the Engineer, required to be changed in location shall be carefully supported and protected from injury by the Contractor; and in case of injury, they shall be restored by him/her, without additional compensation, to as good a condition as that in which they were found.The Contractor shall provide, without additional compensation, suitable temporary channels for the water that may flow along or across the site of the Work when necessary.If all excavated material cannot be stored on the Roadway in such a manner as to maintain access to property along side of the Work, the surplus material shall be removed from the Work and stored until needed for backfill at which time it shall be brought back. If the surplus material is to be stored on other than private property, prior approval must be obtained from the Engineer for the site to be used. The cost of removing and returning material shall be at the Contractor's expense.
City of Fresno Dept. of Public Works34-5A9 May 2024
34-6.3 Bell HolesBell holes are required for push-on and mechanical joint pipe. While push-on joints require only a small depression beneath each bell to allow pipe to lay flat on the trench bottom, mechanical joints require additional space for operation of a ratchet wrench. Minor excavations, which are necessary for removing the sling and for assembling the joints, shall be made in advance of the laying crew and filled after these operations are completed.34-6.4 Trench Width The trench must be wide enough to permit proper installation of the pipe with room for assembling joints and tamping backfill around the pipe. The trench must be at least 12 inches wider than the outside diameter of the pipe to allow for proper placement, tamping, and compaction of the initial backfill. Per the City Standard Specifications, SECTION 16, the width of the trench at the top of the pipe shall not be greater than 16 inches more than the outside diameter of the barrel of the pipe to be laid therein.These requirements may be modified by the Engineer or as shown on the Plans. 34-6.5 Trench Grade Alignment and elevation stakes shall be furnished to the Contractor at set intervals and agreed upon offsets. Where elevation stakes are furnished, the Engineer will also furnish the Contractor with cut sheets. For all pipe 12 inches or greater in diameter, the Contractor shall excavate for and provide an initial granular bedding at least 4 inches thick or 1/12 the O.D. of the pipe whichever is greater. This bedding material shall be placed at a uniform density with minimum compaction and fine graded as specified below. Bell or coupling holes shall be dug after the trench bottom has been graded. Such holes shall be of sufficient width to provide ample room for caulking, banding, or bolting. Holes shall be excavated only as necessary to permit accurate work in the making of the joints and to ensure that the pipe will rest upon the prepared bottom of the trench, and not be supported by any portion of the joint. Depressions for joints, other than bell-and-spigot, shall be made in accordance with the recommendations of the joint manufacturer for the particular joint used. 34-6.6 Fine Grading Unless otherwise specified in the plans and/or special provisions, the bottom of the trench shall be accurately graded to provide uniform bearing and support for each section of the pipe at every point along its entire length, except for portions of the pipe where it is necessary to excavate for bells and for proper sealing of the pipe joints.
City of Fresno Dept. of Public Works34-6A9 May 2024
34-6.7 Rock or Hard Pan Excavation In rock or hard pan excavations it is necessary that the rock or hard pan be removed so that it will not be closer than 4 inches to the bottom and sides of the pipe for sizes up to 24 inches in diameter. This same practice shall be followed should the trench excavation pass through piles of abandoned masonry, large pieces of concrete or other debris. The pipe shall not be permitted to rest on masonry walls, piers, foundations or other unyielding, subterranean structures which may be encountered in the excavation. 34-6.8 Barricades and Safety The Contractor shall follow all the requirements in Section 7-10.4 of the City Standard Specifications. 34-6.9 Shoring In addition to, and consistent with public safety considerations, every precaution for safety must be provided for the workers at the Site. Shoring must comply with Cal-OSHA Standards. 34-6.10 Pavement and Concrete Cutting and Removal Where trenches lie within the portland cement concrete section of streets, alleys, driveways, or sidewalks, etc., such concrete shall be sawcut to neat, vertical true lines in such a manner that the adjoining surface will not be damaged. The minimum depth of cut shall be 1-1/2 inches or 1/4 of the thickness, whichever is greater. No ripping or rooting will be permitted outside limits of cuts. Surfacing material removed shall be hauled from the Site immediately, and will not be permitted in the backfill. 34-6.11 Grading and Stockpiling All grading in the vicinity of trench excavation shall be controlled to prevent surface water from flowing into the trenches. Any water accumulated in the trenches shall be removed by pumping or by other approved methods. During excavation, material suitable for backfilling shall be piled in an orderly manner, a sufficient distance back from the edges of trenches, to avoid overloading and to prevent slides or cave-ins. Material unsuitable for backfilling, or excess material, shall be hauled from the Site and disposed of by the Contractor. The Contractor shall, prior to final acceptance of the Work, submit a letter to the City stating the location of each disposal site for all excess or unsuitable material and City of Fresno Dept. of Public Works34-7A9 May 2024
certify that he has obtained the property owner’s permission for the disposal of all such materials. 34-6.12 Open TrenchExcept where otherwise noted in the special provisions, or approved in writing by the Engineer, trenches shall be excavated only as far in advance of pipe laying as can be backfilled in the same Day. The maximum total length of open trench shall be 600 feet (185 meters), except where approved in writing by the Engineer. Any excavated area shall be considered open trench until all aggregate subbase material for pavement replacement has been placed and compacted. With the approval of the Engineer, pipe laying may be carried on at more than one separate location, the restrictions on open trench applying to each location. Trenches across Streets shall be completely backfilled as soon as possible after pipe laying. Substantial steel plates with adequate trench bracing shall be used to bridge across trenches at Street crossings where trench backfill and temporary patches have not been completed during regular work hours. Safe and convenient passage for pedestrians shall be provided. The Engineer may designate a passage to be provided at any point she/he deems necessary. Access to hospitals, fire stations and fire hydrants must be maintained at all times. 34-7 FOUNDATION, BEDDING, BACKFILLING AND COMPACTION OF TRENCHES 34-7.1 Foundation and Bedding The material upon which the conduit or structure is to be placed shall be accurately finished to the grade or dimensions shown on the Plans or as directed by the Engineer. The bottom portion of the trench shall be brought to grade so that the conduit or structure will be continuously in contact with the material on which it is being placed. Whenever the bottom of the trench is soft, yielding or unsuitable as a foundation for the pipe, such material shall be removed to a minimum of 12 inches (300mm), or to a depth determined by the Engineer, below the bottom of the pipe or structure, and for a width equal to at least ½ diameter on each side of the pipe, and the space backfilled with sufficient clean granular material of the type directed by the Engineer to ensure a proper foundation. No additional payment will be made for over-excavation or placement of clean foundation material unless so indicated in the Specifications or approved by the Engineer. The maximum width of the trench at the top of the pipe shall not be greater than that specified in Table 17-3.1, unless otherwise specified on the approved Plans or Specifications for the Project.
City of Fresno Dept. of Public Works34-8A9 May 2024
Trenches shall be excavated to the depths required for the foundation of Sewer pipes and their appurtenances shown on Plans and where conditions make it necessary to such depths as may be directed by the Engineer. The bottom of the trench shall be excavated or backfilled so that the barrel of the pipe shall have uniform bearing for its entire length, except for the area necessary for bell holes. All adjustment of pipe to line and grade must be made by scraping away or filling and tamping. The use of blocks as support is forbidden. An additional depth and width shall be hand dug at joint or bell locations of sufficient depth to relieve the bell of any load and to allow ample space for making the joint.Where the pipe is to be laid on sand having less than optimum moisture, as determined by the Engineer, the Contractor shall apply sufficient water and compact the sand prior to placing the pipe. 34-7.2 Pipe Embedment Zone Pipe Embedment Zone shall be defined as that material supporting, surrounding, and extending to 12 inched (0.3m) above the top of the pipe. Material used for backfilling within the Pipe Embedment Zone shall consist of the following select Class II or Class III material as defined herein and shall be compacted to a minimum 90% as determined by ASTM D1557 (latest editions). Class II: Washed concrete sand conforming to Section 90 1.02C(4)c of the State Standard Specifications. Class III: Select natural sand and coarse silty sand conforming to the following particle size gradation and sand equivalent: Sieve Size Percent Passing By Weight 3/8” 100No. 4 75-100No. 30 12-50 No. 100 5-20 No. 200 0-10 Sand Equivalent 30 Minimum34-7.3 Initial Backfill Initial backfill shall be the material between the top of the bedding material and 12 inches (0.3mm) above the top of the pipe. Initial Backfill shall consist of placing and firmly compacting selected granular backfill material under the haunches of the pipe and up to the spring-line of the pipe, and then filling to a level 12 inches (300mm) above the top of pipe.
City of Fresno Dept. of Public Works34-9A9 May 2024
Initial backfill shall be placed immediately after the pipe has been laid to line and grade in the trench, inspected and passed by the Engineer. The material shall be carefully placed so as not to disturb or damage the pipe or its placement, and shall be brought up evenly on both sides. Initial backfill material shall be backfilled to one foot (1') above the top of the pipe, in layers not to exceed eight inches (8") in depth and tamped by hand or pneumatic tampers to a relative compaction of 90% as determined by ASTM D1557. The method of compacting and obtaining density requirements for all pipe trenches shall be such that the backfill material shall be completely compacted around the lower haunches of the pipe, such that line and grade of the pipe is not disturbed, and the pipe is not damaged. Where the City’s water system is utilized for construction water, the Contractor shall obtain a water meter from the Water Division (fire hydrant meter are required for all users). The Contractor shall obtain the permission of the Water Division Engineer as to which hydrants are to be utilized. Jetting and Flooding of trenches from the top is not permitted. 34-7.4 Final Backfill Final Backfill shall be the material above the Initial Backfill and consist of sound earthen material which is free of all rocks, hardpan, paving material, organic matter, broken concrete, wood or other deleterious material. Unless otherwise specified, this may be selected native material with no piece larger than 2 inches (50mm). When satisfactory compaction of the native material cannot be achieved, select material in accordance with Initial Backfill requirements shall be required except as necessary to achieve asphalt pavement subgrade requirements. Backfilling of trenches shall be accomplished and constructed per City Standard Drawing No. W-29 with the type of replacement noted on the plans or in the Specifications. Surface restoration shall be accomplished and constructed per City Standard Drawing No. P-48. Backfilling of trenches above the initial backfill as indicated in Section 0, above, shall be as follows: a) Where mechanical compaction is used, the moisture content shall be such that the specified compaction can be obtained and the backfill shall be placed in lifts the height of which shall not exceed that which can be effectively compacted depending on the type of material, type of equipment and methods used, and under no circumstances shall exceed 4 feet. All backfill shall have a relative compaction of 90% to within twenty-four inches (24") of the surface and the top twenty-four inches (24") shall have a relative compaction of City of Fresno Dept. of Public Works34-10A9 May 2024
95%. Test Method ASTM D 1557 shall be used to determine relative compaction, using the dry random sampling method (dry weight basis).No free water will be allowed in the top twenty-four inches (24") of backfill. Backfill, around Utilities that are exposed during trench excavation, shall be placed in accordance with the above bedding, backfill, and compaction methods. 34-8 TESTING AND STERILIZATION34-8.1 General The Specifications constituting this section designate the requirements for the procedure, materials, performance, and payment for testing and sterilization of recycled water mains and appurtenances intended for the conveyance of non-potable water under pressure. Scope of Work The Contractor shall furnish all labor, material, tools, and equipment, including all chemicals, necessary to perform all operations required to complete the testing and sterilization as herein specified.34-8.2 Field Testing a) Hydrostatic Pressure Test: Hydrostatic Pressure test. After the pipe and all appurtenances have been laid and the backfill has been placed and compacted, a hydrostatic pressure test shall be conducted. A hydrostatic test shall be conducted on the entire pipeline for a period of 2 hours at a hydrostatic pressure of 200 psi for Class 200 pipe and 150 psi for Class 150 pipe. In locations where there is a combination of Class 200 and Class 150 pipe, the system testing pressure shall be 150 psi. All valves in the pipeline shall be in the open position during system testing. b) Preparation: The line shall be filled with water at least 24 hours prior to testing.While filling and immediately prior to testing, all air shall be expelled from the pipeline. Where air valves or other suitable outlets are not available for introducing water or releasing air for test purposes, taps and fittings approved by the Engineer shall be installed and later securely plugged.c) Procedure: The procedure shall follow those specified in the AWWA Standard C-600 Sec. 5.2 for ductile iron and C-605 Sec. 10.3 for PVC pipe. The pressure in the pipeline shall be pumped up to the specified test pressure. When the test pressure has been reached, the pumping shall be discontinued until the pressure in the line has dropped 5 psi, at which time the pressure shall again be pumped up to the specified test pressure. This procedure shall be repeated until the end of the test period. At the end of the test period, the pressure shall be pumped up to the test pressure for the last time. The total quantity of water City of Fresno Dept. of Public Works34-11A9 May 2024
pumped to maintain pressure shall be measured and compared to the allowable. d) Leakage: Shall not exceed the amount calculated, using AWWA Standard C-605 for PVC and C-600 for ductile iron.34-8.3 SterilizationPrior to pressure testing and prior to acceptance of Work, the entire pipeline including all valves, fitting, hydrants, service laterals, and other accessories shall be sterilized in accordance with AWWA C600 and C605 latest revision. All mains shall be flushed with potable water after completion of construction and prior to disinfection. The Contractor shall provide a sufficient number of suitable outlets at the end(s) of the line(s) being sterilized in addition to those required by the Plans, to permit the main to be flushed with water at a velocity of at least 5.5 feet per second over its entire length.The outlets provided shall meet the requirements for fittings as specified for the type of main constructed. Temporary blow-offs may be installed during the sterilization and flushing to satisfy these requirements. Drainage facilities shall be constructed such that the water lines cannot be contaminated through the flushing outlet. After flushing, chlorine compound solution made with liquid chlorine, calcium hypochlorite in solution or sodium hypochlorite solution shall be water mixed and introduced into the mains to form a chlorine concentration of approximately 100 ppm or that which will provide a minimum residual of 50 ppm in all parts of the line after 24 hours have elapsed. During the sterilization process all valves, hydrants and other accessories shall be operated. After chlorination, the water shall be flushed from the line at its extremities until the replacement water tests are equal chemically and bacteriologically to those of the permanent source of supply. The placing of chlorine capsules or tablets in pipe sections during the laying process will be considered as an acceptable method of sterilization. The chlorine water solutions shall be diluted to a chlorine concentration of not more than 100 ppm and not less than 50 ppm measured in the water lines. The Contractor shall keep adequate chlorine residual testing and indicating apparatus available on the site during the entire sterilization period. After final flushing, the flushing fitting shall be plugged with devices intended for this purpose at the pressure class of the pipe. Where water main is coated, plugs and outlets shall be similarly coated. Bacteriologic samples of water for the specified bacteriologic test shall be taken from each end of the sterilized main (located downstream of the point of introduction of chlorine disinfectant and at other locations as determined necessary by the Engineer.) Additional samples shall be taken at intermediate points in such a manner that at least one sample is taken for each 700 feet of main. Bacterial samples will be taken a minimum of 48 hours after the mains have been flushed of all chorine. The Contractor shall dechlorinate disinfecting water and flushing water if required by the Plans City of Fresno Dept. of Public Works34-12A9 May 2024
34-9 SIGNAGE A sign reading “Recycled Water-Do Not Drink” in English and Spanish, shall be posted at all points where consumption of the water may be attractive to the public, in areas of public use that receive reclaimed water and at all valves, control boxes, and similar features in accordance with City Standard Drawing No RW-13 . This requirement may also apply to sprinkler heads when after-market clip-on purple rings are readily available in accordance with City Standard Drawing No RW-19. 34-10 ABANDONMENT 34-10.1 General All existing non-potable waterlines or structures that are to be abandoned must be identified in the drawing. In general, abandoned lines that are in service will be replaced with a parallel line of equal or larger size, and the Engineer shall demonstrate in any case that the abandonment does not adversely affect the water system. 34-10.2 Recycled Water Lines All non-potable water lines to be abandoned shall be entirely filled by pumping concrete into them. The pump mix shall be a mixture sufficiently workable for the purposes intended.
City of Fresno Dept. of Public Works35-1A9 May 2024
SECTION 35 – NON-CITY OF FRESNO PUBLIC RIGHT OF WAY 35-1 Generala) This section of the City Standard Specifications is to provide standard requirements for the installation of public right of way projects which are not owned by the City of Fresno (i.e. Freeways, Railways, Irrigation canals). The purpose of this section is to ensure the ability of the City to provide uninterrupted utility services to all customers and also retain the ability to maintain its infrastructure without major disruption to the public. 35-2 Sewer Crossings a) There shall be no City owned access structures located in a non City owned right of way unless the length of sewer in said ROW is in excess of 700 feet. All sewers existing or new which cross the ROW must be protected with a steel casing per City Standard Drawing S-7. The casing must extend 10 feet beyond the entire length of the ROW. For each sewer casing installed an additional redundant parallel casing must be installed with identical slope and elevation and must be located no more than 5 feet (facing edge to facing edge) from the original casing. However the casings must be separated by enough distance to allow adequate compaction around the casings. There must be a 12” concrete plug installed in each end of the redundant casing. b) If any Sewer pipes are to be abandoned or rerouted during the installation of the project, the sewer must be CCTV inspected prior to commencement of the work. All laterals must be investigated and if active shall be rerouted to an active sewer. If the project includes the rerouting of any sewer or installation of new sewers access structures must be installed at each change indirection and at a minimum spacing of every 600 feet. 35-3 Recycled Water Crossings a) All recycled water pipes existing or new which cross the ROW must be protected with a steel casing per City Standard Drawing W-24. The casing must extend 10 feet beyond the entire length of the ROW. For each casing installed an additional redundant parallel casing must be installed with identical slope and elevation and must be located no more than 5 feet from the original casing.