2022 Design and Construction Standards - Section 7 Reclaimed Water

10 SECTION 7 – RECLAIMED WATER PART 1 - GENERAL 11 Work under this section consists of furnishing all plant , labor , materials , and equipment for the installation of buried reclaimed water mains , valves , hydrants , fittings , risers , sprinklers , and appurtenances 12 Standards 121 There shall be no direct cross connections between reclaimed water and potable systems , unless expressly approved by NC DENR for that particular application In all cases where reclaimed and municipal potable water are supplied to the same structure or same facility , a reduced pressure zoned backflow preventer shall be provided on the municipal potable water service The privately owned and maintained reclaimed water service piping and other appurtenances shall be in conformance with the North Carolina Plumbing Code 122 When reclaimed water distribution mains are unavailable , but planned for the future construction , any services lines to facilities for secondary use shall be constructed in accordance with the reclaimed water standards as described herein including all requirements for color and text identification 123 All relocation of existing or permitted reclaimed water infrastructure including service piping and meter boxes shall be permitted and inspected in conformance with County policies 124 Any reclaimed water that leaves the reclaimed distribution system other than by means of permitted use and not covered by the de minimus and incidental discharges listed in15A NCAC 02U 0113 must be disposed of into Johnston County sanitary sewer system , unless otherwise approved by Johnston County Public Utilities Discharges caused by line breaks or system malfunction must be reported to Johnston County Public Utilities immediately 125 In all cases where potable water is used to supply reclaimed water distribution mains on an interim basis , there shall be an approved reduced pressure zoned backflow preventer RPZ , constructed in accordance with cross connection guidelines The RPZ backflow preventer shall be provided on the branch supply line feeding the reclaimed water system and shall be located within 20 ’ of the branch connection 126 Either existing potable or non - potable water lines that are being converted to reclaimed water use must first be accurately located and tested in accordance with Section 13 C If required , the necessary actions to bring the line and appurtenances into compliance with regulatory standards shall be taken Identification tape shall be placed on the converted line on all areas within 10 feet of any water or sewer line crossing SECTION 7 - 1 RECLAIMED WATER 2022 REVISIONPageSECTION 7 – RECLAIMED WATER 127 Service taps on existing reclaimed water mains shall be made by Johnston County Public Utilities Service taps on newly installed reclaimed water mains shall be made by the Contractor in accordance with the specifications PART 2 – DESIGN 21 General All engineering plans must meet the minimum design criteria of the State 15A NCAC 02U – Reclaimed Water and the County Johnston County Water Distribution and Wastewater Collection , and Reclaimed Water Design and Construction Standards , whichever is more stringent All submittals , construction drawings , specifications and as - built drawings shall meet the minimum criteria stated in Section 8 - Certifications , Submittals and Inspections of this Document 22 Location All reclaimed water mains are to be installed within the dedicated street rights - of - ways where possible Utility easements shall be provided for all exceptions Mains within the street rights - of - ways shall be a minimum of 5 feet from the edge of the street pavement Water mains within or in an easement immediately adjacent to a NC DOT right - of - way shall be installed at a depth of 3 feet below the centerline of the road No permanent structures or other utilities shall be installed over water mains or within water easements On new subdivision , an additional 10 - foot utility easement should run parallel with street right of way and this should be used when installing water services , reclaimed water services , sewer laterals , and fire hydrants on high ditch backslopes 23 Size Reclaimed water mains designated as major transmission mains shall be sized according to the Johnston County Director of Utilities and Engineering All other transmission mains shall be designed to meet the minimum design standards set forth by the State in accordance with NC Administrative Code 15A NCAC 02U 0403 All mains shall be a minimum of 2 inch in diameter Irrigation piping shall be 1 2 inch and larger 24 Valves 241 Main Line Valves Main line valves shall be installed at every intersection and at every point where the water main leaves the right - of - way ie along cross country easements All valves larger than 16 ” or installed at a depth 10 ’ or greater shall be enclosed in a manhole and installed along a section of ductile iron reclaimed water main Main line valves shall typically be SECTION 7 - 2 RECLAIMED WATER 2022 REVISIONPageSECTION 7 – RECLAIMED WATER installed immediately adjacent to a fire hydrant tee and on straight runs between intersections at a maximum spacing of 3,000 linear feet Valves should be installed on all branches from feeder mains and between mains and hydrants according to the following schedule 1 Three valves at crosses , all within 2 feet of the fitting 2 Two valves at Tees within 2 feet of the fitting 3 One valve on a single hydrant branch within 2 feet of the tee , if practical 242 Air Release Valves Air Release Valves shall be required on mains 12 ” and larger which have a change in elevation of 15 feet or greater Air release valves shall be installed at the highest point within that elevation change Valves shall be 2 ” minimum with short body style Air release valves shall be made of plastic or stainless steel Valves shall be installed in minimum 4 ’ diameter traffic rated precast flat - top manholes with one joint ductile iron pipe centered in manhole 243 Pressure Reducing and or Pressure Sustaining Valves Pressure reducing and or sustaining valves shall be installed as directed by the Johnston County Director of Utilities and Engineering to connect areas with different pressure gradients Design parameters shall meet the Director’s requirements for pressure regulation Acceptable manufactures are Ross , Golden Anderson , and Cla - Val If pressure reducing and or pressure sustaining valves are located in a manhole , it must meet the size and depth requirements of the air release valve specification 25 Reclaimed Water Services & Meters 251 Residential Services Residential reclaimed water services shall be a minimum of ¾ ” in diameter All residential reclaimed water meters shall be located within the road right - of - way or a 10 - foot dedicated utility easement running parallel to the dedicated roadway right - of - way In the case of service installations on the opposite side of the road from the water main , a 1 - inch service may be installed across the roadway inside a 2 ” PVC encasement pipe the length of the road and then split into two ¾ ” services Water meters installed on a split service must be installed at 2 foot spacing on either side of the common property lines of the customers “ Split ” services shall be used to the maximum extent possible Split services shall be allowed for services only on the opposite side of the road from the water main in new subdivisions Reclaimed water services shall be paired at common property lines , where possible 252 Commercial Services SECTION 7 - 3 RECLAIMED WATER 2022 REVISIONPageSECTION 7 – RECLAIMED WATER Commercial services shall be installed within the road right - of - way or a 10 - foot dedicated easement parallel to the roadway right - of - way where possible For sites with multiple water users , services may be located at the rear of the buildings or other suitable location to minimize impact on business operations during repair or maintenance If the services are located outside the right - of - way , sufficient utility easements must be provided for the reclaimed water lines from the right - of - way to the services and around the services Meter boxes , including gang meter assemblies must be located in “ grassed ” areas or in the rear of the building Gang meter boxes shall be clearly and permanently labelled with the unit served on the interior side wall of the box No meter boxes shall be installed in concrete or asphalt areas on the front side of the building Prior to the County installing the reclaimed water meter , a grease trap must be installed on the premises for any food service establishments , and an oil water separator installed for any automotive service establishments The County will provide all meter at the developer’s or owner’s expense Meters will be Neptune E - Coder R900i with touch read attachment 253 Master Meters Master meters shall be permitted to serve single ownership , single lot properties in the following categories 1 Apartments Condominiums 2 Hotels Motels 3 Hospitals 4 Warehouses Industrial Buildings 5 Schools 6 Mobile Home Parks 7 Shopping Centers 8 Churches 9 Rest Homes 10 Agricultural Fields Facilities Plans for these properties shall meet all building and fire code requirements All reclaimed water mains , valves , and fire hydrants shall meet the County’s standards and specifications Master meters 3 ” and larger shall be constructed above ground within an insulated heated removable enclosure or below grade in an adequately sized vault with positive drainage and approved manway access The property owner shall be responsible for providing power for keeping the meter thawed out during freezing weather conditions For meters 1 ½ ” and larger , a by - pass with a valve is required The by - pass may be built into the yoke or designed in the piping , depending on the size of the water service 254 Gang Meter Assemblies Gang meter assemblies shall be installed with a resilient seat gate valve with a 2 ” operating nut , valve box , and collar at the water main tap or tee SECTION 7 - 4 RECLAIMED WATER 2022 REVISIONPagePage pageNumber5SECTION 7 – RECLAIMED WATER All piping material shall be threaded brass or threaded ductile iron nipples Polytubing is allowed from the main to the gang meter assembly only 26 Encasement 151 All pipelines 8 inch in diameter and larger installed under roadways shall be installed as a carrier pipe inside an encasement pipe Encasement shall extend a minimum of 8 feet from the edge of pavement on each side of the roadway PART 3 - MATERIALS 31 General All materials and appurtenances shall meet the following minimum standard requirements therefore Pipe shall be of the type , size , class and diameter as hereinafter specified General design considerations shall comply with all applicable AWWA Standards for each type and to the following Pipe smaller than 12 ” diameter shall be ductile iron Class 200 AWWA C151 , PVC ASTM SDR 21 Class 200 , or HDPE DIPS DR 9 Pipe diameter 12 ” and larger shall be ductile iron , polyvinyl chloride conforming to AWWA specification C - 900 C - 905 , or HDPE DIPS DR 9 All fire hydrant legs from the main to the hydrant shall be ductile iron pipe Trench width for buried pipe design shall be considered as the outside diameter of the pipe plus two 2 feet , at the bottom and up to one foot above the top of the pipe Stone bedding to the spring line of the pipe is required for buried pipe in all wet or unsuitable soil areas In other areas with suitable trench conditions , buried pipe shall be designed for laying conditions as shown in standard water details flat bottom trench - tamped backfill to withstand all internal pressures and external loads with a minimum depth to cover of three feet for pipelines eight inches and smaller in diameter , and three feet - six inches for lines 10 inches and larger in diameter , and greater depths of cover where required plus an H - 20 live load in accordance with AASTHO Specifications Design pressure shall consist of a minimum of 150 psi working pressure plus 100 psi surge allowance unless designated otherwise by the County or required by actual design conditions Pipe diameters called for shall be the minimum net inside diameter of the pipe after any required lining is placed , with a maximum tolerance of 1 4 inch on the minus side , for sizes through 36 - inch diameter SECTION 7 - 5 RECLAIMED WATER 2022 REVISIONPagePage pageNumber6SECTION 7 – RECLAIMED WATER Pipe fittings shall be of the size , and at least the same class as the pipe with which they are used Ductile iron fittings shall be used with all ductile iron pipe and PVC pipe 4 inches or larger in diameter Compact DI fittings may be used , and all DI fittings shall be mechanical joint type for buried installations and flanged for above ground and vault installations All ductile iron fittings shall be cement lined and coated with the exception of sleeves All valves shall have standard mechanical joint ends , except where flanged or other type ends are specifically required Flanges , where required , shall be a minimum of 125 - lb ANSI standard Unless operating pressure requires stronger flanges , all valves shall be furnished with 2 ” square operating nuts , or handwheels as necessary for above ground service All valves shall be of at least the same class as the pipe with which they are used A valve box with lid reading “ reclaimed water ” shall be provided for each underground valve Precast concrete manholes , with a flat top and cast - iron frame and cover , shall be provided for all air valves A pre - cast concrete manhole shall be provided for all gate valves larger than 16 ” and all gate valves installed deeper than 6 feet All valve box riser sections shall be ductile iron All pipe must meet the color coding and identification requirements set forth in 15A NCAC 02U 0403 32 Ductile Cast Iron Pipe Ductile cast iron pipe shall be centrifugally cast of ductile cast iron Class 50 having a minimum tensile strength of 60,000 psi , a minimum yield strength of 42,000 psi , and a minimum elongation of 10 percent Grade 60 - 42 - 10 It shall be designed , manufactured , and shall conform to the requirements of ANSI A2150 and ANSI A2151 AWWA C151 - 1991 Standards , for a minimum 150 psi operating pressure plus a minimum allowance of 100 psi for surge Nominal laying lengths shall be 18 to 20 feet nominal maximum of 20 percent of each size for each order being as much as 24 inches shorter than the nominal laying length and an additional 10 percent as much as 6 inches shorter than nominal laying length Pipe joints shall be bell and spigot , push - on , gasketed type except where other joint types are specifically required by the Plans Dimensions shall conform to the requirements of ANSI A216 , ANSI A218 , ANSI A2111 , and WW - P - 42 1C , as applicable Dimensions shall be gauged at sufficiently frequent intervals to assure dimensional control Insides of sockets and outside of spigot ends shall be tested with circular gages SECTION 7 - 6 RECLAIMED WATER 2022 REVISIONPagePage pageNumber7SECTION 7 – RECLAIMED WATER Tolerances below the standard thickness of pipe and bell shall not exceed Allow Minus Tolerances Size inches inches 4 - 8 005 10 - 12 006 14 - 42 007 All pipe shall be tested at the factory in accordance with AWWA requirements for each type Each pipe shall be coated on the outside with standard bituminous coating of either coal tar or asphalt base approximately one mil thick The coating shall be continuous , smooth , and strongly adherent to the pipe and shall not become brittle from cold or sticky from heat Interior surfaces of each pipe , for water service , shall be cement lined in accordance with ANSI 214 , with minimum thickness of 1 16 - inch for 3 to 12 - inch pipe and 3 32 - inch for 14 to 24 - inch pipe , and 1 8 - inch for 30 to 48 - inch pipe Each pipe shall be weighed prior to placing of inside lining Weight , nominal thickness , sampling period , and class of pipe shall be shown on each pipe The manufacturer’s year of production and the letters DI or DUCTILE shall also be cast or stamped on the pipe All markings shall be clear and legible and on , or near , the bell end 33 Polyvinyl Chloride Pipe PVC pipe shall be rigid polyvinyl chloride with integrally formed , factory fabricated bell , for rubber type joint rings It shall be suitable for all conditions imposed by Plan locations and for a maximum working pressure of 150 psi , plus 100 - psi surge allowance at 73 degrees F Pipe shall be Type 1 , Grade 1 , made from clear virgin material and shall conform to the requirements of Commercial Standard C5 256 , ASTM D1784 , ASTM D2241 and with standard dimension ratio SDR 21 Class 200 All pipe shall bear the National Sanitation Foundation Seal of Approval for potable water , the manufacture’s name , and class of pipe or PVC pipe shall be rigid polyvinyl chloride with integrally formed , factory fabricated for rubber ring type joints It shall be suitable for all conditions SECTION 7 - 7 RECLAIMED WATER 2022 REVISIONPagePage pageNumber8SECTION 7 – RECLAIMED WATER imposed by Plan locations and for a minimum working pressure of 150 psi , plus 100 - psi surge allowance at 73 degrees F Pipe shall be Type 1 , Grade 1 , made from clear virgin material and shall conform to all requirements of AWWA Specifications C - 900 or C - 905 , Class 150 All pipe shall bear the manufacturer’s name , specification , and class pipe Provisions must be made for expansion and contraction at each joint , through the rubber gasket and pipe bell Laying lengths shall be 20 feet 1 inch , or 38 feet 1 inch except that , random lengths may be furnished for special connections and other special uses Stored PVC pipe shall not be exposed to sunlight for more than ninety 90 days Any excess pipe stored on - site for more than 90 days shall be covered with an opaque tarpaulin with means provided for heat dissipation and ventilation Pipe discolored due to sunlight exposure shall not be installed in the County’s distribution system The County’s representative shall determine the suitability of the exposed pipe The installation date for all PVC pipe shall be no later than one year from the date of manufacture as stamped on the pipe 34 HDPE Pipe HDPE pipe for directional drilling must be SDR9 or heavier and sized to have the inside diameter of the HDPE pipe to match the inside diameter of the connecting water main Connection of HDPE shall be installed using fused HDPE flanged connection to FL x PE DIP Connection details must be specifically approved by the County 35 Electronic Marker Balls Electronic location markers shall consist of 4 marker balls having a passive device capable of reflecting a specifically designated repulse frequency , unique to the utility being installed The marker ball will contain a passive - tuned antenna , molded inside a plastic disk , which is free - floating inside a water - resistant polyethylene shell The shell shall be impervious to minerals , chemicals and temperature extremes Marker balls shall be color coded pantone 522 purple in accordance with the American Public Works Association’s utility location and coordinating council standards Electronic marker balls shall be as manufactured by 3M Telecom Systems or equal Marker balls shall be installed directly over the center line of the point to be located , and a minimum of 6 from any metal objects Burial shall not be less than 18 nor more than 2 feet Marker balls shall be installed concurrently with water mains Ball markers to be hand backfilled to 1 foot above ball marker as to prevent movement or damage The maximum depth for marker ball burial shall SECTION 7 - 8 RECLAIMED WATER 2022 REVISIONPagePage pageNumber9SECTION 7 – RECLAIMED WATER be 2 feet Electronic marker balls shall be installed at the following locations 251 On ductile iron and PVC pipe 1 At a minimum of every one hundred linear feet directly over main line 2 At bends 22 and 1 2 degrees and larger 3 At capped or plugged ends if no blow - off assembly 4 At tees over main line 5 At reducers 36 Electronic Marker Tape Tracer Wire Electronic Marker Tape to be installed on all PVC reclaimed water lines and all ductile iron lines installed at depths greater than 6 ft All reclaimed water piping , valves , outlets and other appurtenances shall be color - coded Pantone 522C , taped , or otherwise marked to identify the source of the water as being reclaimed water Electronic Marker Tape to be laid in the same ditch to the side of the pipe no more than one foot from the pipe , secured to the pipe every 25 feet , and with a minimum cover of two foot deep Tracer stations shall be installed at intervals no less than 300 feet a part or from other above ground conductive appurtenances hydrants , blow - offs Tracer stations shall be housed in a valve box painted Pantone 522C and labeled TS The tracer wire shall be # 12 copper wire The tape shall be fastened to the inside of valve box with three feet of excess wire in the box for connectivity All Electronic Marker Tape installed in steel encasements shall be inspected and tested to ensure that no damage occurred during installation 37 Encasement Pipe Installations Encasement pipe for installation under highways and railroads shall be spiral welded steel pipe conforming to ASTM Specification A252 - 61 , Grade 2 Encasement pipe shall conform to DOT specifications for pipe laying for highway crossings and to AREA specifications for railroad crossings The pipe shall be furnished with a bituminous coating on the outside 371 Carrier pipe - DI with locking gaskets meetin the ductile iron pipe requirements set forth in Section 22 372 Spacers – Stainless steel “ spiders ” shall be provided At least 2 spacers per joint shall be provided for ductile iron carrier pipe 38 Ductile Cast Iron Fittings Ductile cast iron fittings shall conform to the requirements of ANSI Specification A2110 , with mechanical joint ends conforming to ANSI Specification A2111 , except that material and manufacturer shall conform to ASTM Specification A339 , Grade 80 - 60 - 3 All fittings , except sleeves , shall be bituminous coated and cement lined as required for pipe Where flanged ends may be required , flanges shall conform to applicable requirements of ANSI B161 and ANSI B16b Minimum class shall be class 350 pipe No push - on joint ends will be allowed Compact fittings are acceptable SECTION 7 - 9 RECLAIMED WATER 2022 REVISIONPage0SECTION 7 – RECLAIMED WATER 39 PVC Fittings PVC fittings and adapters shall conform to the same requirements as for pipe and shall be the same class as the pipe Fittings shall be O - ring joint push - on type PVC fittings shall not be used with pipe 4 inches or larger in diameter 310 Tapping Sleeves and Saddles Tapping sleeves shall be used on all taps greater than 2 In areas with poor materials , stone backfilling shall be used Tapping sleeves shall be shall be the wide banded type , with two 2 304 or 316 stainless steel bands , suitable for bolting in place on the pipe to be tapped The body construction shall be a minimum of SECTION 7 - 10 RECLAIMED WATER 2022 REVISIONPage1SECTION 7 – RECLAIMED WATER Outlet Half load bearing half Outlet sizes 2 ” - 8 ” 12 gauge stainless steel Outlet sizes 10 ” & larger 10 gauge stainless steel Back Half conforming half 14 gauge stainless steel Outlet schedule 10 stainless steel pipe to accept full size cutter Flange stainless steel Length Outlet Size Length 2 ” - 6 ” 15 ” 8 ” 21 ” 10 ” 27 ” 12 ” 30 ” Sleeve shall meet all the requirements of ANSI AWWA C110 A2110 and C111 A211 Tapping sleeves shall have a full circumferential gasket Lubricate pipe and face of gasket with water or soap - water Do not use petroleum - based products such as grease or pipe lubricant Tapping sleeves shall be JCM 432 , Mueller H - 304 , Ford FTSS , Romac ST III , or approved equal 311 Gaskets Gaskets for pipe and fittings shall be continuous ring of rubber material compounded to resist deterioration and of a texture to assure a permanent and watertight seal They shall have smooth surfaces , free from pitting , blisters , porosity or any other defects Gaskets shall conform to the requirements of AWWA specification C301 and Federal Specification WW - P 4211 Gasket lubricant shall be a potable hydrogenated vegetable oil , insoluble in cold water , non - toxic , shall not support the growth of bacteria , and shall not impart taste or odor to the water It shall not contain detergent soaps , organic solvents or other deleterious ingredients and shall have no deteriorating effects on the gaskets The lubricant shall be semi - paste , easily applicable , readily adherent to the inside of the bell and shall remain in a usable state throughout the range of temperature in which pipe is normally installed 312 Gate Valves Gate valves shall be used in sizes 12 ” or smaller and shall be used in buried applications Gate valves shall be iron body , resilient wedge , non - rising stem and provided with suitable stem seals They shall comply with AWWA C509 and be designed for an operating pressure of 200 psi All valves shall open left counter clockwise Buried valves shall have a 2 - inch square operating rest Extension stems shall be furnished where depth of bury places operating nut in excess of four feet below finished grade Extension stems must have centering ring Twenty - inch 20 valves and larger shall be equipped with bevel gear operator RECLAIMED WATER SECTION 7 - 10 2022 REVISIONPage2SECTION 7 – RECLAIMED WATER The gear mechanism shall be totally enclosed with watertight gear case , suitable for underground installation The valves shall be designed for installation in a horizontal position and shall be equipped with track , scrappers , and rollers or trunions Valve interior coating shall be the industry standard unless otherwise specified and outside for all potable water services Buried valves shall be coated on the outside with bituminous or asphalt coating approximately ten mil thick Valves should be installed on all branches from feeder mains and between mains and hydrants according to the following schedule 1 Three valves at crosses , all within 2 feet of the fitting 2 Two valves at Tees within 2 feet of the fitting 3 One valve on a single hydrant branch within 2 feet of the tee , if practical 313 Butterfly Valves Butterfly valves shall not be installed on the County’s reclaimed water distribution system , unless specifically approved by Johnston County Department of Utilities 314 Valve Boxes Valve boxes shall be of cast iron , three - piece screw type with covers and bases They shall be of suitable size for the valve with which they are used and fully adjustable for depth of setting , extension pieces being furnished where necessary Drop type covers shall be provided for each box with the proper word “ RECLAIMED WATER ” designating the valve service cast into its top surface Brick bases shall be provided and shall be so designed to fully support the box without weight of the box and or superimposed load being transmitted to any part of the valve or adjacent pipe on either side All valve boxes and lids shall be the same size and interchangeable with the County’s existing valve box A circular precast concrete collar shall be installed around all valve boxes 315 Pressure Air Valves The valves shall be designed for at least 150 - psi pressure Air valves shall be installed in a precast , flat - top manhole with a cast iron frame and cover A suitable ¼ turn ball cut off valve shall be provided Isolation valve and inlet piping shall be stainless steel 316 Hydrants Hydrants shall be fabricated of ductile iron pipe or PVC depending on the type and shall conform to the details shown on the plans Hydrants shall be anchored SECTION 7 - 11 RECLAIMED WATER 2022 REVISIONPage3SECTION 7 – RECLAIMED WATER to prevent movement under all operating conditions All hydrants shall be painted purple , Pantone 522 or otherwise wrapped in purple polyethylene wrap 317 Blow - Offs Blow - Offs shall conform to the details provided The blow - off assembly shall consist of all fittings , pipe , and appurtenances as shown in standard water details The valve shall meet the requirements for other gate valves and shall be suitable for the anticipated pressure Blow - off assembly piping shall be brass or DI The standpipe shall be installed so that the top of the standpipe shall be no more than 4 ” - 6 ” below grade Blow - offs shall be located in areas which will allow for positive drainage that will not cause damage or erosion and will not create a nuisance Blow offs shall not be located in areas where reclaimed water irrigation is prohibited as listed in 15A NCAC 02U 0113 318 Valve Markers Valve markers shall be as shown on the detail and of concrete , reinforced as shown Concrete shall be of a mix design to produce a 3,000 - psi compressive strength at 28 days They shall be marked with recessed letters , either MV , AV , or BO In subdivisions or residential areas , the valve markers shall be no more than 8 – 10 ” above grade Valve markers in all other areas shall be no more than 18 ” above grade The markers shall be installed so all letters on the markers may be read All markers shall be purple , Pantone 522 or otherwise wrapped in purple polyethylene wrap and be labeled “ RECLAIMED WATER ” 319 Reclaimed Water Service Meters and Appurtenances 3191 Water meters for individual residences and small commercial unit services shall be displacement disc type with magnetic drive and hermetically sealed register The meters shall conform to the design and accuracy requirements of AWWA Specification C700 - 71 Registers shall be straight reading with units of gallons Meters shall have male threaded ends and copper alloy cases and shall have a minimum warranty of one 1 year after installation to be free from defects in workmanship and materials Meters for normal single - family residential service shall be 5 8 x 3 4 with a safe operating capacity of 20 GPM 3192 For projects that will be provided retail service by the County through a ¾ ” , 1 ” , or 1 1 2 ” connection , meters shall be provided by Johnston County Department of Utilities at the developer’s or customer’s expense and set by the County For projects that will be provided retail service by the County through a 2 ” or larger connection , meters shall be provided by Johnston County Department of Utilities at the developer’s or customer’s expense and set by the Contractor during the construction of the meter vault SECTION 7 - 12 RECLAIMED WATER 2022 REVISIONPage4SECTION 7 – RECLAIMED WATER 3193 Copper meter yokes with lockable angle meter stops shall be used on all new water services Yokes for water services 2 ” and larger shall be sized for a compound meter installation 3194 Meter couplings shall be standard bronze , suitable for meters with male threaded ends 3195 Angle meter stops shall be heavy - duty bronze with double O - ring seals and threaded ends and shall be the same size as the meter Angle meter stops shall be lockable in the off position 3196 Meter boxes shall be rectangular or oval type with minimum nominal dimensions of 20 x 10 - 1 2 x 12 lwd Lids shall have a DI hinged door Boxes shall be plastic except for traffic bearing installations , which shall be cast iron All meter boxes must have a 2 ” hole in lid of the box Meter boxes and yokes for 1 ½ ” water services shall be “ oversized ” Meter boxes for 2 ” water services and larger should be precast concrete with a cast iron lid containing a 2 ” hole in the lid The plastic box shall be provided in purple color dyed into fiberglass construction The meter box cover shall be made of light weight polymer concrete dyed purple , Pantone 522 with the words “ Caution Reclaimed Water – Do Not Drink ” embossed the cover The inside of the meter box shall be painted purple and text shall be stenciled on the inside of the interior indicating “ Caution Reclaimed Water – Do Not Drink ” 3197 Corporation stops shall be heavy - duty bronze with double O - ring seals and threaded ends and shall be suitable for use with all standard water works tapping machines Stiffener inserts shall be plastic Corporation stops shall be rated for a minimum working pressure of 300 psi 3198 Reclaimed water service pipe shall be polyethylene tubing rated for 200 psi Where water services are “ paired ” , a single 1 ” service line may be provided with a bronze wye Where service lines cross under pavement and are installed by open cut , a 2 ” schedule 40 PVC sleeve shall be provided the length of the road 3188 Water service saddles shall be wide body style for PVC water mains Ford S - 70 , JCM 403 , Mueller H - 134 or equal or double strap style for ductile iron water mains Ford S - 90 , JCM 403 , Mueller BR2B or equal Body shall be stainless steel , bronze or brass with O - ring seal , manufactured to meet AWWA C800 Saddles shall be used for ¾ ” , 1 ” and 1 ½ ” service outlet diameter taps SECTION 7 - 13 RECLAIMED WATER 2022 REVISIONPage5SECTION 7 – RECLAIMED WATER 3189 A resilient seat gate valve with 2 ” operating nut and valve box must be installed at the tap for all services 1 ½ ” and larger in diameter 320 Mechanical Couplings Mechanical couplings shall be Dresser , Style 38 couplings for cast iron and steel pipe Equal styles by Rockwell , Smith - Blair and other manufacturers may be employed 321 Sprinkler Systems 3211 Plans designating the location , size , material , and depth shall be submitted with an agreement application to Johnston County Public Utilities Utilization zones shall not be within 100 feet of a well 3212 Pipe material for the irrigation mainline shall be Schedule 40 or greater provided in Pantone 522 purple A minimum depth of 2 ’ of cover shall be provided Typical white Schedule 40 pipe will be allowed only if the pipe is wrapped with purple polyethylene film and identified as reclaimed water piping with identification tape 3213 The reclaimed water irrigation mainline pipe system shall be hydrostatically tested with a minimum pressure of 175 psi 3214 Hose bibs shall be installed and maintained on private property by private property owners in accordance with NCDENR rules and the plumbing code Above ground hose bibs are not allowed Hose bibs can be located in a locked , below grade vaults All below grade vaults for hose bibs shall be painted purp0le , Pantone 522 with the words “ Caution Reclaimed Water – Do Not Drink ” embossed in the cover The inside of the vault box shall be painted purple and text shall be stenciled on the inside of the interior indicating “ Caution Reclaimed Water – Do Not Drink ” 3215 Sprinklers for installation on below ground piping shall conform to the following 32151 Full Circle – Irrigation Duty Senniger Model 7025 with 9 32 ” nozzle , Rain Bird Model 70 CWH with 9 32 ” nozzle , Nelson F70PV with 9 32 ” nozzle , or approved equal Units shall be rated approximately 18 GPM at 60 psi with a welted diameter of 135 ’ to 138 ’ 32152 Part Circle – Irrigation Duty Rain Bird Model 65 PJ - ADJ - TNT with ¼ ” nozzle , Walla - Walla P65 with ¼ ” nozzle , or approved equal Units shall be rated approximately 14 GPM at 60 psi with wetted radius of 58 ’ to 64 ’ 32153 Full Circle – Dust Control Senniger Model 5023 with 7 32 ” nozzle , Rain Bird 14070WH with 7 32 ” nozzle , Nelson F43APV with 7 32 ” nozzle , or approved equal Units shall be rated approximately 11 GPM at 60 psi with a wetted diameter of 110 ’ SECTION 7 - 14 RECLAIMED WATER 2022 REVISIONPage6SECTION 7 – RECLAIMED WATER 32154 Part Circle – Dust Control Rain Bird Model 35A - PJDA - TNT with 3 16 ” nozzle , Walla - Walla Model P35 with 3 16 ” nozzle , or approved equal Units shall be rated approximately 8 GPM at 60 psi with a wetted radius of 50 ’ 3216 Drip Irrigation – Dripline piping 32061 The dripline shall consist of nominal sized one - half inch linear low - density polyethylene tubing , with turbulent flow , drip emitters bonded to the inside wall The tubing shall have an outside diameter OD of approximately 63 - inches and an inside diameter ID of approximately 54 - inches 32062 The tubing shall consist of three layers ; the inside layer shall be a bactericide protection ; the middle layer shall be black and the outside layer shall be purple pantone 522 for easy identification 32063 The dripline shall have emitters regularly spaced 18 ” apart The pressure compensating emitters shall be molded from virgin polyethylene resin with a silicone rubber diaphragm The pressure compensating emitters shall have nominal discharge rates of ½ gallon per hour 322 Storage Facilities 3221 Storage facilities shall not be placed within 100 feet of a private or public water source Water storage ponds shall not be placed within 50 feet of a property line 3222 Setbacks from property lines may be waived if the pond was constructed prior to July 18 , 2011 Setbacks from property lines and existing wells may be waived with the express written consent of the adjacent property owner 3223 Storage facilities shall meet all riparian buffer rules pursuant to 15A NCAC 02B and Johnston County Ordinances 323 Color Coding System 3221 All distribution mains associated with this project shall be tagged or labeled to warn the public that the water is not intended for drinking Piping , valves , hydrants , outlets and other appurtenances shall be purple Pantone 522 color - coded , taped or otherwise marked to identify the source of water as being reclaimed water in accordance with the requirements of 15A NCAC 02U – Reclaimed Water Minimum requirements are as follows 32211 All reclaimed water piping and appurtenances shall be installed with identification tape Identification tape shall be at least 3 inches wide and have white or black lettering on purple Pantone 522 field stating “ CAUTION RECLAIMED WATER – DO NOT DRINK ” Identification tape shall be installed on top of reclaimed water SECTION 7 - 15 RECLAIMED WATER 2022 REVISIONPage7SECTION 7 – RECLAIMED WATER pipelines , fastened at least every 10 feet to each pipe length with nylon or polypropylene straps and run continuously the entire length of the pipe 32212 An approved Pantone 522 purple is required to meet identification under NC 15A NCAC 02U and referenced herein as the color code identification for reclaimed water piping , valves , and other appurtenances In all cases a minimum film thickness of 10 - mils of a two - coat system consisting of apart high solids cured epoxy as a primer shall be applied For application open to daylight , the paint shall be UV protection with a polyurethane top coat 32213 All valve boxes , manhole covers , hatch covers , sprinklers , hydrants , and above ground piping and appurtenances shall be integrally colored or painted purple Pantone 522 PART 4 – INSTALLATION , INSPECTIONS AND TESTS 41 Locations Pipe work shall be installed at the locations shown on the Plans and to the position , alignment , and grade shown thereon Prior to beginning work at any location , the Contractor shall consult with the Owner to determine that all rights - of - way , permits , or other legalities are in order He shall familiarize himself with all conditions and or limitations of such rights - of - way or permits and shall fully comply with all such requirements All work shall be confined to rights - of - way or permit limits and any encroachment beyond such limits shall be the Contractors liability 411 RELATION OF RECLAIMED WATER MAINS TO WELLS 4111 Reclaimed water mains shall not be less than 50 ’ from a well Where the required minimum separation from wells cannot be met , Johnston County Public Utilities must approve the piping and integrity testing procedures to meet portable water main standards In no case shall it be less than 25 ’ from a private well Reclaimed water utilization areas shall not be less than 100 ’ from a well 412 LOCATION OF RECLAIMED WATER MAINS TO WATER MAINS 4121 Reclaimed water lines shall be laid with 10 ’ horizontal separation from water line and water main at least 18 ” vertically above reclaimed water line When lateral separation cannot be met , provide minimum 3 ’ separation and ferrous material shall be used for both pipelines 4122 Crossing a Water Main over a Reclaimed Water Main Whenever it is necessary for a water main to cross over a reclaimed water main , the reclaimed water main shall be laid at such an elevation that the bottom of the water main is at least 18 above the top of the reclaimed water main , unless RECLAIMED WATER SECTION 7 - 16 2022 REVISIONPage8SECTION 7 – RECLAIMED WATER local conditions or barriers prevent an 18 vertical separation , in which case the water main and reclaimed water main shall be constructed of ferrous materials and with joints that are equivalent to water main standards for a distance of 10 on each side of the point of crossing Ferrous materials shall be wrapped with purple polyethylene wrap as specified herein 4123 Crossing a Water Main Under a Reclaimed Water Main Whenever it is necessary for a water main to cross under a reclaimed water main , both the water main and the reclaimed water main shall be constructed of ferrous materials and with joints equivalent to reclaimed water main standards for a distance of 10 on each side of the point of crossing A section of ductile iron pipe shall be centered at the point of crossing Ferrous materials shall be wrapped with purple polyethylene wrap as specified herein 4124 Reclaimed water mains shall be laid with at least 2 ’ of horizontal separation from existing sanitary sewer lines , unless the elevation of the bottom of the reclaimed water main is at least 18 ” above the top of the sanitary sewer In cases where a reclaimed water main must cross within 18 ” of an existing sewer main , the reclaimed water main shall be constructed of ductile iron with joints that are equivalent to water main standards for a distance of 10 ’ on each side of the point of crossing 42 Clearing & Grubbing Clearing and grubbing , where required , shall be done prior to beginning of pipe installation It shall be done in accordance with applicable portions of items of General Conditions and the following The Contractor shall consult with the Owner and Engineer prior to starting clearing and a full understanding is to be reached as to procedure The Contractor shall then conduct clearing and grubbing operations in strict accordance with these agreements • Clearing of trees and brush along the pipeline shall be carefully done so that no damage will occur outside of the limits of the right - of - way Trees and brush must be cut by hand and trees felled within the right - of - way limits Trees 6 or more in diameter shall be trimmed , cut into usable lengths of 3 , or as DIRECTED BY THE OWNER disposed of in a manner approved by the Engineer • Brush , laps , roots , etc , shall be disposed off - site in a manner approved by the Engineer Burning of trees , brush and debris will not be permitted , unless the appropriate permits have been obtained • Grubbing of stumps that are in the way of construction shall be done in any convenient manner which will not cause damage to remaining trees or adjacent property Stumps shall be disposed as for brush or RECLAIMED WATER SECTION 7 - 17 2022 REVISIONPage9SECTION 7 – RECLAIMED WATER laps above • Limits of the pipe - laying operation shall be confined to the right - of - way and easements The width of clearing shall be held to a minimum and in no case more than the width of the easement , without the written consent of the Engineer 43 Work on Highway Right - Of - Way 431 The Contractor shall not begin work on any property of the Department of Transportation until necessary right - of - way encroachment permits are in hand Prior to any construction in the NCDOT right - of - way , the contractor shall videotape the proposed utility route in order to verify pre - existing conditions and provide the County with a dated digital copy He shall conform to all requirements of the Department of Transportation or its authorized representatives in the prosecution of this portion of the work It shall be the responsibility of the contractor to contact the local highway representative and to determine the exact requirements for work to be done Requirements shall include , but are not limited to the following 4311 Where a pipeline crosses under a highway , it shall be installed either by open cut , in tunnel , or in encasement under the highway Materials and method of crossing shall be indicated on the Plans for each crossing Where pipe is installed by open cut , at least one full lane for traffic shall be kept open and clear at all times The contractor shall be responsible for any certifications and testing required for open - cut installations ? The Contractor shall provide full - time flagmen , with appropriate stop signs , at all times when work is in progress ? Necessary warning and descriptive signs shall be provided and placed at each end of the working area while work is in progress along highways These signs shall be well tended and shall be placed at sufficient distances from the site of the work so that ample warning is given to approaching traffic Signs shall be removed when daily work is completed ? The Contractor shall keep all streets open to traffic at all times unless permitted otherwise by County Representative or Department of Transportation as applicable The Contractor shall provide , place and maintain temporary traffic control devices as directed by the County Representative or Department of Transportation The latest edition of the Manual on Uniform Traffic Control Devices for Streets and Highways as prepared by the National Joint Committee on Uniform Traffic Control Devices shall be used as a guide in the placement of devices and all devices shall meet the requirements of said manual ? Where pipe is installed in open cut across a highway , the cut shall be RECLAIMED WATER SECTION 7 - 18 2022 REVISIONPage0SECTION 7 – RECLAIMED WATER immediately backfilled with ABC stone and compacted per NCDOT specifications All the work of repairing the pavement must be completed immediately Any subsequent settlement shall be immediately corrected and repaired ? Where pavement is cut and replaced , the Contractor shall cut the edges to a straight and even line before repairing the pavement No ragged edges will be allowed or accepted ? Where asphalt pavement or bituminous surfacing is cut , the entire area to be repaired shall be primed with an asphalt prime coat , acceptable to the Department of Transportation before the pavement is replaced ? When required , the Contractor shall furnish to the Department of Transportation a 100 Performance Bond for the amount of work to be undertaken boring or paving to be cut and replaced along highways Bond is required in North Carolina ? Unless otherwise indicated , no excavated material shall be placed on the pavement side of the ditch , along State Highways The least possible amount of trench will be left open when work is not in progress and equipment shall be removed from the pavement and shoulders during shutdown periods ? Screenings shall be used where excavated material is placed on the pavement ? Roadways shall be completely cleaned at the end of each workday ? Shoulders of roadways shall be left in good , acceptable condition and all topsoil and grass that is disturbed shall be replaced The Contractor shall pay the cost of all Department of Transportation inspectors time if required on the job 44 Work on Railroad Right - Of - Way 441 The Contractor shall not begin work on any property of the railroad until he has secured necessary permits Prior to any construction in the railroad right - of - way , the contractor shall videotape the proposed utility route in order to verify pre - existing conditions He shall conform to all requirements of the railroad , or its authorized representatives , in the prosecution of this portion of the work 45 Bored Encasement Installation 451 No bore pits or equipment shall be placed outside the right - of - way or easement without expressed consent of landowner 452 Encasement pipe which is dry bored under highways and railroads for installation of RECLAIMED WATER SECTION 7 - 19 2022 REVISIONPage1SECTION 7 – RECLAIMED WATER water lines shall be installed at the locations , to the gradients , and within the tolerances if any , as shown on the plans In event the encasement is installed off grade or seriously out of line , then another encasement pipe will be dry bored as close as practical to the original pipe with no additional compensation allowed therefore The original encasement must be sealed with a watertight concrete plug min 3 deep at each end When boring equipment is removed , compacted material 95 should be brought up to the invert of the pipe 453 Pipelines installed through steel encasement shall meet specifications herein described and all Department of Transportation or Railroad specifications and guidelines for installing pipelines through steel encasement pipe Upon insertion of the pipeline through the encasement pipe , the ends of the encasement pipe shall be sealed with brick and mortar Brick and mortar shall be as herein specified , and the seal shall be such to withstand hydrostatic pressure from ground water and all backfill loads Contractor shall provide means to prevent water line from floating within the encasement pipe Grouting procedure will not be allowed 454 Casing pipe and joints shall be of leak proof construction , capable of withstanding railway or traffic loading The diameter of the casing pipe shall be at least 4 greater than the largest outside diameter of the carrier pipe , joints , or couplings for carrier pipe less than 6 in diameter and at least 4 greater for carrier pipe , 6 in diameter and greater , unless indicated differently on drawings Further , the casing pipe shall be of great enough diameter to allow carrier pipe to be removed subsequently without disturbing the case pipe and immediate areas 455 Steel encasement and carrier pipe shall be as specified in item 26 of this section or as required by the railway owner , whichever is greater 46 Trench Excavation 461 Trenches for pipe shall be dug true to line and grade and to the following requirements Depth of cover shall not be less than 3 - 0 for pipe up to 8 in diameter and 3 - 6 for pipe 10 and larger in diameter , measured to the top of pipe , unless shown differently on the profile or authorized by the Engineer The depth of cover shall be measured from edge of pavement or finished grade , whichever is deeper If the water main is installed in the bottom of the ditch , the depth of cover shall be measured from the bottom of the ditch 462 Sides of trenches shall be kept as nearly vertical as possible They shall be at least 12 and not more than 18 wider at the top of the pipe than the outside diameter of the pipe , plus sheathing where it is necessary Where paving is to be cut , it shall be cut in advance of trenching 1 wider than the specified width of the trench 463 Where soil conditions prohibit vertical walls , the trench width at the bottom and at 1 above the top of the pipe shall be as specified above with the remainder being held to the least possible width greater than that specified Where soil conditions prevent ditch excavation without excessive widths , or where directed by the Engineer , wood RECLAIMED WATER SECTION 7 - 20 2022 REVISIONPage2SECTION 7 – RECLAIMED WATER sheeting , as hereinafter specified , shall be driven to support the trench walls or a suitably reinforced steel trench box shall be employed 464 Trench bottoms shall be hand graded to provide uniform and continuous bearing for the pipe along its entire length , with bell holes being dug for pipe bells No ridges , sags , or undercutting will be allowed Excess excavating below grade shall be backfilled with suitable material , which shall be thoroughly tamped 465 If approved by the Engineer and subject to suitable soil conditions , the trench may be excavated a few inches below the established subgrade and backfilled with select material from the excavation , if available well compacted and so shaped as to give the pipes uniform bearing throughout their lengths at the established grade Bell holes shall be dug to relieve the bells of load and to provide for completing the joints 466 Where the material at grade is unstable , soft , and incapable of supporting the pipe , the trench shall be excavated below grade , as directed by the Engineer , and refilled to grade with crusher - run stone or gravel to form a firm foundation for the pipe Stone shall be compacted and graded to provide a stable foundation and a uniform bearing for pipe Bell holes shall be provided as in other types of foundations 467 When authorized by the Engineer , the Contractor shall dispose of material excavated from the trench that is unsuitable for backfill material The Contractor shall provide select borrow material to replace unsuitable material for backfilling the trench as directed 468 Should ground water be encountered in the bottom of the trench , causing the trench bottom to be unstable , the material , as directed by the Engineer , shall be excavated below grade sufficiently to allow a bed of crushed rock or gravel to be place in which to bed the pipe The crushed rock or gravel shall be placed up to the spring line of the pipe The work shall be done as for unstable foundations The depth of cut below grade shall be only the minimum amount to accomplish the purpose , and shall be as directed by the Engineer 469 The Contractor shall furnish all machinery for pumping , bailing , and or well pointing and shall pump , bail , or otherwise remove any water which may be found or shall accumulate in the trenches , and shall perform all work necessary to keep them clear of water while the pipe is being laid The disposal of water after removal shall be satisfactory to the Engineer 4610 Whenever necessary , the side of the trench shall be braced and rendered secure and either open or closed sheeting used to the satisfaction of the Engineer ; such sheeting and bracing to be left in place until the trench is refilled to a safe limit , not less than 2 above the top of the pipe The top portion may then be cut off , but the lower portion shall remain undisturbed In lieu of sheeting , suitable trench boxes may be employed All sheeting , bracing , trench boxes , and trench construction methods shall conform to the latest Department of Labor Safety and Health Regulations for construction RECLAIMED WATER SECTION 7 - 21 2022 REVISIONPage3SECTION 7 – RECLAIMED WATER promulgated under the Occupational Safety and Health Act of 1970 4611 All existing water , sewer , and gas lines , buried electrical and telephone cable , and other known utilities intersecting the lines of construction , if requested by the Engineer or County’s representative , shall be uncovered by the Contractor at his expense and exposed to the Engineer at least 100 ahead of pipe laying operations to insure the correctness of grades 4612 The Contractor shall at all times take necessary precautions in preventing gutters , catch basins , ditches and other drainage facilities from being clogged that might cause flooding conditions and damage to public or private properties 4613 Rock Removal , Blasting 46131 In rock or other unyielding material , the excavation shall be made at least 6 below subgrade elevation The trench shall be refilled with select material compacted in place as specified for ordinary excavation Suitable material from excavation may be used , if available If not , it shall be hauled in 46132 All blasting , where required , shall be done under the personal supervision of someone thoroughly skilled in this class of work All necessary measures to protect life and property shall be taken When in close proximity to buildings , transmission lines , telephone lines or other facilities , timber mats or other means of preventing damage from flying debris shall be used Ample and suitable signals shall be given in proximity to the work before each blast , and flagmen shall be placed on all roads , beyond the danger zone , in every direction to warn traffic All responsibility for damage rests on the Contractor A Prior to any blasting , a pre - blast survey must be conducted including an evaluation of any structures within 500 ’ of the proposed blasting The survey shall also determine well recover rates for any water supply wells within 100 ’ of the proposed blasting The Contractor shall not contact property owners directly for pre - blast surveying until the County has first provided notification to affected residents The County is not responsible for any delays associated with pre - blast surveying or notifications B The approved NCDOT Encroachment Agreement for the project does not allow blasting in the NCDOT right - of - way If the contractor wishes to perform blasting in the right - of - way , it shall be the responsibility of the contractor to provide any necessary information to NCDOT and acquire the revised encroachment agreement The Owner shall not be responsible for any delays associated with seeking blasting approval from NC DOT RECLAIMED WATER SECTION 7 - 22 2022 REVISIONPage4SECTION 7 – RECLAIMED WATER C Submittals required for blasting approval a Names , addresses , telephone numbers , and qualifications of the blasting subcontractor s and explosive supplier s that will be used Contact and licensing for the designated Blaster - In - Charge b Copies of certificates of completion of specialized training for the handling of explosives for the designated Blaster - In - Charge , blasting foreman and any other key personnel responsible for the work c A blasting plan , indicating the methods , materials , and equipment to be used The blasting plan shall indicate the types of explosives , drilling patterns , and general layout to be used to execute the work A licensed blaster shall select the materials and design the blasting pattern The blasting plan shall include a schedule The plan shall meet all State regulations and be sealed by a professional engineer licensed in the North Carolina d A ground vibration and air blast monitoring plan , indicating structures that will be monitored , monitoring equipment that will be used , and personnel responsible for the monitoring D A minimum of 24 hours prior to each round of blasting , the Contractor shall submit a detailed blast round design plan to the Engineer’s on - site representative The blasting plan submitted is for quality control and record keeping purposes Review by the Engineer shall not relieve the Contractor of his responsibilities as provided herein The blast round design submittals shall include a Location state grid coordinates and limits of the shot b Number , diameter , and depth of blast holes to be detonated in the round , and a plan showing drill hole pattern , spacing and distance to the free face c Depth of overburden d Types and total weight of the explosives to be used in the round e Loading diagram showing the location of explosives , primers , and initiators ; location , depth , and type of stemming to be used in each hole f Initiation sequence , including delay timer and delay system , total weight of explosive to be detonated on each delay , and a list of timing of delays g Manufacturer’s data sheet for all explosives , primers , and initiators used h Planned seismic monitoring positions , distances RECLAIMED WATER SECTION 7 - 23 2022 REVISIONPage5SECTION 7 – RECLAIMED WATER from the blast round , and seismograph types to the used to monitor vibrations and air blast overpressures i Type and amount of blasting mats and or depth of soil cover to be used over the top surface of the shot j Any other information required by applicable State and Federal regulations E The Contractor and subcontractor s shall comply with all applicable Federal , State , and local codes , laws , rules and regulations as well as professional society standards for the storage transportation and use of explosives F Blasting is subject to the following warning levels and not to exceed limits Variable Warning Level Not - to - Exceed Limit Vibration PPV gt; 40 Hz 075 in sec 19 mm sec 10 in sec 25 mm sec Vibration PPV lt; 40 Hz 040 in sec 10 mm sec 05 in sec 13 mm sec Air - overpressure noise 120 dBL 133 dBL G Post - Blast Reporting – within three 3 days of each blast , the Contractor shall submit post - blast reports including the following information at a minimum a Results and effectiveness of the blast and any proposed changes to subsequent site specific blast plans b Blast monitoring report i Type , identification and specific location of monitoring equipment ii Distance and direction of blast iii PPV in each direction and peak vector sum iv Maximum air - overpressure c Blast damage report when necessary d Drilling records including blast pattern and blast hole drill logs 46133 Rock Excavation for trenches and pits includes removal and disposal of materials and obstructions encountered that cannot be excavated with a track - mounted power excavator , equivalent to Caterpillar Model No 320 CL , and rated at not less than 138 HP flywheel and 44,000 - pound drawbar pull and equipped with a short stick and a 30 - inch - wide , tight tip radius rock bucket with rock teeth rated at 075 cubic yard heaped capacity RECLAIMED WATER SECTION 7 - 24 2022 REVISIONPage6SECTION 7 – RECLAIMED WATER i Typical of materials classified as rock are boulders one - half 1 2 cubic yard or more in volume , solid rock , rock in ledges , and rock - hard cementitious aggregate deposits ii Intermittent drilling , blasting , or ripping performed to increase production and not necessary to permit excavation of material encountered will be classified as earth excavation iii Do not perform rock excavation work until material to be excavated has been cross - sectioned and classified by the Owner’s representative , and such information provided to the Engineer for approval 46134 Rock shall be defined as that solid material that cannot be excavated under the conditions stated above All blasting shall be done after coordination with the County representative and subject to all applicable regulations The County reserves the right to require the removal of rock by means other than blasting where any pipe or conduit is either too close to or so situated with respect to the blasting as to make blasting hazardous Rock taken from the ditch shall immediately be hauled away and disposed of by the contractor at his expense 47 Pipe Installation 471 The Contractor shall haul the pipe and appurtenances to the site of the work and distribute them neatly along the trench prior to laying The pipe shall be carefully handled to prevent damage Mechanical hoists or other approved methods shall be used in the handling Depth of cover shall not be less than 3 ’ for pipes 8 ” in diameter or less and 3 - 6 for pipes 10 and larger in diameter , measured to the top of pipe , except where shown