- All new construction or renovation projects which necessitate modification of or an addition to existing utility systems must be coordinated with and approved by Engineering Services in the Utilities Division of OPP.
- Instructions to Professionals
- Once-thru cooling using potable water is not permitted on any equipment.
- Planning Modules (PADEP Chapter 71) are required for any project when new flows are projected. The Professional shall obtain the standard planning module documents from PADER and complete them for processing. Documents will be submitted to Engineering Services for review and approval. If the project will discharge to a PSU Waste Water Treatment Plant, it requires a letter of documentation by PSU that the conveyance and treatment facilities have adequate capacity to accept the additional sewage flows generated by the specific project.
- Following approval of Engineering Services, the Project Manager shall direct submission to the appropriate municipality with the proper request for resolution and submittal to PADER.
- Approval by PADER is required prior to commencement of project construction.
- Wires shall extend above grade and shall terminate at a building wall, the top of catch basins or manholes, or similar, visible locations. Precise location of termination shall be approved by Engineering Services.
- Tracer wiring shall be installed with all utility lines, regardless of material or service. Where multiple electrical conduits are installed in a single concrete ductbank, only one tracer wire shall be installed per ductbank.
- Utilities serving existing buildings, installations, or facilities shall not be interrupted until the Contractor has made the necessary arrangements with, and has received approval from, the University.
- In the event that interruption of any existing utility service is necessary, the responsible Contractor shall be required to make all the arrangements for shutdown and start-up of such service with the University representative.
- University crews must be used to shut down and start up all University owned services which require interruption for temporary or permanent connections.
- All planned interruptions to University services must be scheduled two (2) weeks in advance and the work will generally be done outside of normal working hours.
- The Contractor shall provide a certification that all plumbing materials are lead-free and meet the requirements of the Pennsylvania Plumbing System and Lead Ban Notification Act where the building will be serviced by a University water system (University Park, Mont Alto, and Wilkes-Barre Campuses). This certification shall be signed by the Contractor, notarized, and submitted to the University before the water service is turned on. Return completed form (see Figure 15G-I) to Director, Utilities Division, Office of Physical Plant.
- The consultant must provide digital (AutoCAD) as-built surveys of the all new utilities to the University. Red line mark-ups are not acceptable.
.02 Temporary Utility Service
- Water Providers
- The University produces, treats, and distributes its own water at University Park Campus, Mont Alto Campus, Wilkes-Barre Campus, and other small remote University owned locations.
- The remaining Campuses and Facilities purchase water from the local public water supplier. The level of water system ownership and point of ownership varies from campus to campus. Please contact the PSU Engineering Services’ Utility Systems Engineer – Water for specific information.
- Sources and Treatment at University Owned Systems
- The source and treatment standards for the University Owned Systems will be site specific. Please contact the PSU Engineering Services’ Utility Systems Engineer – Water for specific requirements.
- The design by the Design Professional and installation by the Contractor shall comply with Pennsylvania State University's Design and Construction Standards Division 33 10 00 Water Utilities (University Standards), and in the event of a conflict between the American Water Works Association (AWWA) Standards and University Standards, the University Standards shall supersede.
- For Water Utilities Standards not covered in this section, please contact the PSU Engineering Services’ Utility Systems Engineer – Water for specific requirements.
- University Water Service and Water Line Extension Plan Approval Requirements.
- As part of the Project Design process, a plan shall be submitted to the PSU Engineering Services’ Utility Systems Engineer – Water for review and approval for the following proposed modification of the University owned water distribution systems/service lines:
- Modification of existing water services including meters and backflow preventers.
- Installation of new water services.
- Modification and relocation of existing water distribution system piping.
- Installation of new water distribution system piping.
- The plan submission shall include the PSU Project Name and Number, proposed construction dates, estimated average and peak domestic demand, estimated fire protection demands, and drawing/plans for the proposed modification. Refer to “PSU Water Service and Water Line Extension Plan Approval Requirements” document in .04 Guideline details for all of the specific requirements of the plan submission.
- A Water Services System Modification Permit will be issue for each approved plan. The permit and installation must be followed and adhered, failure to comply with the permit, design standards, and required inspections and testing will result in refusal of activation of the water service.
- Distribution Systems
- Building domestic and fire service sizing, including, but not limited to, meters, backflow preventers, valves, etc., shall be performed by the Engineer of Record. At University Park, the building shall be serviced with a common service line for both domestic and fire services from the distribution system to the building. The domestic and fire services shall be separated in the building’s mechanical room. At all Penn State locations other than University Park, the building shall be serviced with a common service line for both domestic and fire services from the distribution system to the building, unless otherwise required by the public water supplier or local building code. The common service line shall be separated in the building’s mechanical room for the domestic and fire services.
.02 System Requirements
- Waterlines three inches in diameter and greater shall be ductile iron pipe meeting all requirements of ANSI/AWWA C110/A21.10 (latest version) and ANSI/AWWA C111/A21.11 (latest version). The class for ductile iron pipe shall be thickness Class 52. Fittings shall be Class 350#, ductile iron compact or full body mechanical joint fittings. All ductile iron pipe and fittings shall be double cement lined and coated outside with a bituminous seal coat all according to ANSI/AWWA C104/A21.4 (latest version) and ANSI/AWWA C151/A21.51 (latest version) respectively. All pipe joints shall be fully restrained either by mechanical joint (“Megalugs” style restraint) or push-on joint type with gasket conforming to ANSI/AWWA C111/A21.11 (latest version) and shall be American Pipe Flex-Ring/Field-Loc, Fast-Grip gasket or equal as approved by Engineering Services. All ductile iron pipe must be installed in accordance with ANSI/AWWA C600 (latest version). The design must be approved by PSU Engineering Services’ Utility Systems Engineer – Water. At University Park, the installation must be inspected by Water Services prior to backfilling the excavation; the inspection shall be scheduled with the Water Services Supervisor a minimum of three (3) business days prior to the planned inspection. At other locations than University Park, the installation must be inspected by University Personnel prior to backfilling the excavation. Failure to have the inspection performed will result in refusal of services until the pipe is re-excavated and inspected at the Contractor’s expense.
- Waterline services connections smaller than three inches shall be constructed of high density polyethylene pipe (HDPE) and must conform to ANSI/AWWA C901 (latest version). The minimum acceptable pressure class is 200 psi. The preferred installation will be a continuous section of pipe from the ductile iron isolation valve on the water main tap to the inside of the building. All underground splices must be a heat fusion connection. The design must be approved by PSU Engineering Services’ Utility Systems Engineer – Water. At University Park, the installation must be inspected by Water Services prior to backfilling the excavation; the inspection shall be scheduled with the Water Services Supervisor a minimum of three (3) business days prior to the planned inspection. At other locations than University Park, the installation must be inspected by University Personnel prior to backfilling the excavation. Failure to have the inspection performed will result in refusal of services until the pipe is re-excavated and inspected at the Contractor's expense.
- Pipe fitting other than mechanical joint restraint ("Megalugs") shall be accomplished by the utilization of adequate concrete thrust blocks as approved by both the National Board of Fire Underwriters "Standard for Outside Protection" and Penn State Engineering Services. The Design Professional shall submit the thrust block restraint calculations to PSU Engineering Services. All fittings shall be wrapped with polyethylene encasement to prevent concrete thrust blocking from contacting the joint fittings.
- Connections and Tapping of Water Lines
- At University Park Campus, all taps and connections must be made by Water Services, refer to section “K. Operation and Connection to Existing Waterlines”, and the requirements in this section regarding material standards. At all Penn State locations other than University Park, connections to existing waterlines shall be done by the contractor, but only in the presence of PSU Office of Physical Plant staff, and the requirements in this section regarding material standards.
- Taps shall be made using tapping sleeves for the connection piping two (2) pipe diameter sizes and smaller than the pipe to be tap. Taps shall be made by the installation of the appropriate sized tee for the connection piping of equal size and one (1) pipe diameter size smaller than the pipe to be “tapped”.
- Tapping sleeves shall be either full circumferential all stainless steel flanged outlet style, Ford FTSS, Romas SST III, or approved equal; or full circumferential all ductile iron flanged outlet style, American Flow Control Series 2800, or approved equal. Tapping Sleeve and Tapping Valve shall be a complete assembly, including tapping sleeve, tapping valve, and bolts and nuts.
- Tapping valves shall be in conformance with the applicable provisions of AWWA C509 or C515 (latest version), and the exterior of valve shall be coated with fusion bonded epoxy coating complying with AWWA C550 (latest version). Tapping valves shall OPEN IN THE COUNTERCLOCKWISE direction. The mechanical joint end of the tapping valve shall be in accordance with the applicable provisions of AWWA C111 (latest version). Tapping valves shall be furnished with a raised male face on the end flange, which fits into a recess on the tapping sleeve. This fit shall assure proper alignment between the sleeve and valve and facilitate passage of the cutter during the tapping procedure. The mating valve flange to the tapping sleeve outlet must have a raised male face, conforming to MSS SP-60, to ensure there alignment of valve and tapping machine. All interior and exterior ferrous surfaces shall be protected against corrosion by fusion-bonded-epoxy coating complying with AWWA C550 (latest version).
- Boring and Encasement Piping
- The University shall require steel pipe encasement for water lines placed under critical roadways, tunnels, utility tunnels, and utility duct banks. For other boring applications to minimize ground surface damage and restoration costs, shall comply with this section.
- A steel encasement pipe shall be installed for water lines in each of these applications. All casing pipe, up to and including 24-inch diameter, shall be new uncoated, steel pipe in accordance with ASTM Specification A-53, Grade B and AWWA C200 (latest version); diameter as required to accommodate the water line and casing spacers; wall thickness as required; and minimum yield strength of 35,000 psi. Pipe larger than 24-inches shall be fabricated using ASTM, A283, Grade C steel with straight longitudinal welding seams. Casing pipe shall be furnished in 18 to 20-foot lengths. All casing pipe joints shall be butt welded completely around or along the joint by a certified welder in accordance with all applicable provisions of the American Welding Society and the American Water Works Association C-206 (latest version). The ends of the casing shall be sealed with a wrap-around casing end seal as to prevent the entrance of foreign material. Refer to Boring and Encasement Piping Detail in .04 Guideline Details.
- Casing pipe shall have a minimum wall thickness as listed below; note any local, state, federal, and railway transportation corporation permit requirements supersede the dimensions listed in the table below.
Encasement Pipe Outside
Road and Utility Crorssing Wall
Railroad Crossing Wall
8 0.250 0.250 12 0.250 0.250 16 0.250 0.281 20 0.312 0.344 24 0.312 0.375 30 0.370 0.469 36 0.469 0.532 42 0.469 0.625 48 0.625 0.688
- The water lines place in the encasement piping shall be ductile iron pipe meeting all requirements of ANSI/AWWA C110/A21.10 (latest version) and ANSI/AWWA C111/A21.11 (latest version). The class for ductile iron pipe shall be thickness Class 56. Fittings shall be Class 350, ductile iron compact or full body mechanical joint fittings. All ductile iron pipe and fittings shall be double cement lined and coated outside with a bituminous seal coat all according to ANSI/AWWA C104/A21.4 (latest version) and ANSI/AWWA C151/A21.51 (latest version) respectively. All pipe joints shall be fully restrained either by mechanical joint (“Megalugs” style restraint) or push-on joint type with gasket conforming to ANSI/AWWA C111/A21.11 (latest version) and shall be American Pipe Flex-Ring/Field-Loc, Fast-Grip gasket or equal as approved by Engineering Services.
- The boring and pipe installation shall adhere to the following requirements.
- The Contractor shall use an experienced crew to operate the boring equipment being used. The crew shall have at least two (2) years of boring experience with this equipment.
- The Contractor shall excavate the boring pit of a width and length as required for that specific boring equipment. The Contractor shall be required to provide adequate protection for all existing utilities and structures encountered. The Contractor shall provide adequate sheeting/shoring on all of the walls of the boring pits. All sheeting/shoring must be in compliance with all local, state, and federal safety requirements, including U.S. OSHA standards.
- If water is known or expected to be encountered, pumps of adequate capacity to handle the flow of water shall be maintained at the boring location(s). These pumps shall be in attended and operated continuously until operation can be safely stopped.
- In an obstruction is encountered during installation, which stops the forward action of the pipe, and it becomes impossible to advance the pipe, the pipe shall be abandoned in place. The abandoned pipe must be completely filled with grout.
- If voids should develop or if the bored hole diameter is greater than the outside diameter of the pipe by more than one (1) inch, these voids shall be filled with grout.
- The grouting requirements to fill the annular space and void area between the disturbed earth and casing pipes and for abandoned casings shall be a uniform mixture of one (1) part of cement to six (6) parts of sand placed under pressure through the grout holes to fill any voids that exist between the casing pipe and disturbed earth.
- The waterline shall have casing spacers install around the circumference of the pipe prior to installation into the casing pipe. The casing spacers shall be made of high density polyethylene (HDPE) with tensile properties meeting or exceeding ASTM D638, and shall be installed according to manufacturer’s recommendations and specifications. The casing spacers shall be RACI (Public Works Marketing, Inc., Dallas, TX), Ranger II (Pipeline Seal and Insulator, Inc. Houston, TX), or approved equal.
- The encasement piping shall have both ends of the pipe seal around the water line to prevent any material entering the encasement piping. The end seals shall consist of 0.125-inch minimum thickness synthetic neoprene rubber with self-adhesive/self-curing mastic applied rubber and specifically fabricated for the casing pipe/condition carrier dimensional condition with stainless steel bands to secure around the piping. The end seals shall be installed according to manufacturer’s recommendations and specifications. The casing end seals shall be as manufactured by Public Works Marketing, Inc., Pipeline Seal and Insulator, Inc., or approved equal.
- Provide combination air release/vacuum breaker devices at all high points in new distribution piping. Combination air release/vacuum breaker devices shall be automatic float operated valves designed to exhaust large quantities of air during the filling of a piping system and close upon liquid entry. The device shall open during draining or if a negative pressure occurs. The device shall also release accumulated air from the piping system while the system is in operation and under pressure. The device shall perform the functions of both air release and vacuum breaker and furnished as a single body or dual body type. The device shall be constructed of 304 or 316 stainless steel. The manufacture shall be Crispin, or approved equal. The air release/vacuum breaker devices shall conform to AWWA C512 Standard (latest version). The device shall be connected to the distribution pipe via an appropriately sized ductile iron tee fitting located on the distribution piping, have an isolation valve, OS&Y resilient–seated gate valves, epoxy coated, for water supply service conforming to AWWA C509 Standard (latest version), and be located in a concrete vault. Refer to the Air Release Detail in .04 Guideline Details.
- For non-looped and dead-end water lines, a blow off/flushing piping shall be provided. The blow off/flushing piping shall consist of ductile iron piping from a tee fitting, a gate valve, and other required fittings on the water line to be flushed. The blow off/flushing discharge pipe shall be above grade, directed away from waterways and streams, and installed to minimize velocity disturbance to land and structures. For blow off/flushing piping that does not drain by gravity, a “bleeder” hole shall be drilled in the pipe. Refer to Blow-off Detail in .04 Guideline Details.
- All water lines shall be designed from the crown of the pipe to be a minimum of 4 feet and a maximum of 8 feet below finished grade. The trench shall be backfilled on the bottom and sides of the pipe to a height of one foot above the top of the pipe with crushed stone dust or PennDOT 2B stone. Refer to Water Pipe Trench Details for the applicable conditions in .04 Guideline Details . The remaining backfill material shall be earth, free of wood, ashes and other debris, but may contain rock pieces not larger than eight inches in their greatest dimension, but consisting of not more than twenty-five percent rock by volume. No other material shall be used as backfill.
- Backfill material in non-structural areas must be placed in lifts as to exceed 12 inches and compacted to a minimum of 95 percent of the maximum dry density as determined by the Standard Proctor method (ASTM D698).
- Backfill material in structural areas is defined as all fill placed under and around foundations, utilities, floor slabs, sidewalks, roadways and parking lots. Any borrow material utilized as fill should not contain rock greater than 3 inches in diameter, and should not contain more than 1 percent (by weight) of organic matter or other deleterious material. Unified Soils Classifications (ASTM D2487) of GW, GM, GC, SW, SM, SC, CL (LL<40) and combinations thereof are considered suitable for use as structural fill. Lateral confinement of poorly-graded sand and gravel will be required in order to limit horizontal movement and subsequent settlement or instability of the structural fill. Uniformly graded materials, such as PennDOT 2B or AASHTO #57 stone, are not considered an appropriate structural fill material. Potentially expansive materials such as mine tailings, pyritic shale and slag should not be used as structural fill material. All fill should have less than 0.1% total sulfur by weight as determined by ASTM D4239. Additional evaluation of suspected expansive shale should include wet-dry durability testing in accordance with PennDOT Test Method No. 519. Other materials should be considered on a case-by-case basis; alternate materials should be approved by the project’s geotechnical engineer. All structural fill should be placed in horizontal lifts not exceeding 8 inches in loose thickness and within 2 percent of optimum moisture for compaction. The fill should be compacted to 100 percent of maximum dry density as determined by the Standard Proctor method (ASTM D698). Compaction testing shall be submitted to Engineering Services for review.
- Clay Dikes shall be required on pipe runs over 300 feet in length. The clay dikes shall be placed a maximum of every 300 feet. The clay dikes shall not cover or be within three (3) feet of any pipe joint, fitting, valve, or tap. The clay dike shall be constructed perpendicular to the trench, the base shall be constructed directly on top of undisturbed material, shall be the width of the trench, shall be the five (5) feet in length, and at least three (3) feet in height above the crown of the water pipe. The clay dike shall consist of clay containing no more than 15% (by volume) stone not larger than two (2) inches in diameter. The clay shall be placed in six (6) inch lifts and compacted by mechanical tamper to not less than 95% of maximum density at optimum moisture content. Refer to the Trench Plug Installation in .04 Guideline Details.
- All water lines shall have a #10 tracer wire attached to the pipe in accordance with section Division 33 01 00.01 B. Metallic warning tape shall be installed in the trench approximately 18 inches above the crown of the pipe.
- Provide adequate thrust blocks as approved by both the National Board of Fire Underwriters "Standard for Outside Protection" and PSU Engineering Services. All fittings shall be wrapped with polyethylene encasement to prevent concrete thrust blocking from contacting the joint fittings.
- For pipe connections and modifications to existing cast iron that is not mechanical retrained, a “reinforced concrete deadman” shall be installed to secure the existing pipe prior to cutting into the cast iron pipe. Refer to Deadman Detail in .04 Guideline Details.
- The design professional must submit as-built digital surveys of all water piping, valves, fittings, etc. to the Engineering Services Department, including pipe elevation and finished surface grade. The digital as-built surveys must be in AutoCAD, using Pennsylvania State Plane NAD 83.
- Valves - Underground
- Gate valves shall be manufactured in accordance with ANSI/AWWA C509 or C515 (latest version). The type shall be RESILIENT SEATED and shall have a nonrising stem (NRS). THE DIRECTION TO OPEN SHALL BE COUNTERCLOCKWISE. The operating nut shall be two inches square. Valves shall have ends suitable for use with mechanical joint pipe. Exterior of valve shall be coated with fusion bonded epoxy coating complying with AWWA C550 (latest version).
- Valve boxes shall be cast iron of the three piece screw type installed over the bonnet and operating nut, and of sufficient length to reach the surface of the ground but not extend above the ground surface. The word "water" shall be cast in valve box lid.
- Valves – Water Distribution and Water Services
- Valves, four (4) inches and larger, located in vaults and inside of buildings, including for water meters and backflow preventers shall be OS&Y resilient–seated gate valves, epoxy coated, for water supply service conforming to AWWA C509 Standard (latest version).
- Valves, three (3) inches and smaller, located in vaults and inside of
buildings, including for water meters and backflow preventers shall be
full port ball valves approved for water supply service. The valves
bodies shall be constructed of either 304 or 316 stainless steel, or
brass/bronze. The valves must comply with the US EPA definition of
being lead free; the 2011 amendments to Section 1417 of SDWA (the
Reduction of Lead in Drinking Water Act). All components in contact
with drinking water shall be listed by a third party agency to NSF 61
- Fire Hydrants
- At University Park Campus, fire hydrants shall have National Standard (NH) threads. Fire hydrants shall conform to AWWA C-502 (latest version). Fire hydrants shall have two (2) 2.5-inch hose outlets and one (1) 4.5- inch pumper connection, NO CHAINS on hose outlet caps, and a 1.5-inch pentagon operating nut, open “LEFT”. Hydrants shall be American Flow Control (formerly American Darling) No. B-62-B-5 fire hydrants with traffic feature, or other as approved by Engineering Services.
- At locations other than University Park Campus, coordinate threads and outlet size with fire department serving that location. Fire hydrants shall conform to AWWA C-502 (latest version). Hydrants shall be American Flow Control (formerly American Darling) No. B-62-B-5 fire hydrants with traffic feature, or other as approved by Engineering Services. Refer to Fire Hydrant Detail in .04 Guideline Details.
- At the University Park Campus, fire hydrant flow for existing hydrants may be available from the Engineering Services’ Utility Systems Engineer – Water. All fire hydrant flow tests must be scheduled through Engineering Services’ Utility Systems Engineer – Water. At University Park Campus, all fire hydrant flow tests must be performed by Water Services’ Employees. At locations other than University Park Campus, Engineering Services’ Utility Systems Engineer – Water shall coordinator with the respective water supplier.
- The fire hydrants at University Park shall be painted as per the following requirements:
- Barrel shall be painted yellow.
- If the 2.5-inch outlets have national standard hose (NH) thread, paint the 2.5-inch caps silver. If another thread pattern, paint all of the caps the same color.
- Test hydrant by measurement of the flow from a single 2.5-inch outlet.
- For flow less than 500 gallons per minute (gpm); the steamer cap and top shall be painted Red.
- For flow greater than or equal to 500 gpm, but less than 1,000 gpm; the steamer cap and top shall be painted Orange.
- For flow greater than or equal to 1,000 gpm, but less than 1,500 gpm; the steamer cap and top shall be painted Green.
- For flow greater than or equal to 1,500 gpm; the steamer cap and top shall be painted Light Blue.
- For questions regarding fire hydrant flows, contact the PSU Engineering Services’ Utility Systems Engineer – Water.
- Water Meters
- The water flow to each building shall be metered with a cyclometer counter giving a direct reading in gallons. All meters larger than 2" shall be compound meters. A touch read remote transmitter shall be provided and the counter located in an approved location.
- Meters shall conform to AWWA Standards C700, C702, or C703 (latest version). A full-size bypass shall be provided around the meter to allow for servicing. Refer to Water Meter and Backflow Preventer Details for the applicable conditions in .04 Guideline Details. Provide a meter manufacturer recommended strainer with each meter.
- At locations served by the University Park Utility Water Services
system, meter and associated strainer shall be a manufactured by Neptune
Technology Group provided by Water Services for installation by the
contractor, and billed to the Project at cost. The meter and strainer
must be ordered from Water Services at least thirty (30) days prior to
the planned installation. The current standard at University Park
Campus for meters less than two inches is the Neptune Technology Group
T-10 Meter with an E-Coder Head. The current standard at University
Park Campus for meters greater than two inches is the Neptune Technology
Group TRU/FLO Compound Meter with E-Coder Heads. The Engineer of
Record shall be responsible for the proper sizing the meter and
strainer. The remote radio transmitter shall be “T-Clarity”, which
shall be provided and installed by Water Services, and shall be billed
to the Project at cost. For new buildings and building renovations, the
water meter data shall be brought into the University’s BAS System
instead of using the “T-Clarity” Radio Transmitter. This data will be
brought into the BAS system via a single SCADAmetrics’ EtherMeter from
the water meter’s E-coder registers. The contractor shall install a
120-volt, single phase, 20 amp circuit and 0.5-inch EMT conduit within
five (5) feet of the water meter. The 0.5-inch EMT conduit shall extend
from the water meter to a telecommunication junction point. The
connection of the E-coder registers to the BAS System shall be performed
by University’s Office of Physical Plant Personnel, and the cost of
installation shall be billed to the Project at cost. Meters shall be
inspected by Water Services prior to service activation.
- At all other locations, the meter and strainer manufacturer shall be Neptune Technology Group, unless otherwise required by the local water authority. The Engineer of Record shall be responsible for the proper sizing the meter and strainer.
- Backflow Prevention
No water service connection shall be installed or maintained to or at any building where actual or potential cross-connections to the system would result, unless such actual or potential cross-connections are abated or controlled to the satisfaction of PSU Engineering Services’ Utility Systems Engineer – Water.
No connection shall be installed or maintained whereby water from an auxiliary water supply may enter the University water system unless such auxiliary water supply and the method of connection and use of such supply shall have been approved by PSU Engineering Services’ Utility Systems Engineer – Water.
- An approved backflow prevention device(s) shall be installed prior to the first branch line leading off each service line to a building water system. Double check backflow prevention devices shall comply with AWWA Standard C510 (latest version). Reduced pressure zone backflow prevention devices shall comply with AWWA Standard C511 (latest version). Refer to Water Meter and Backflow Preventer Details for the applicable conditions in .04 Guideline Details.
- An approved double check or reduced pressure zone backflow prevention device shall be installed on each service line to a building water system. Type of backflow prevention device shall be determined by PSU Engineering Services’ Utility Systems Engineer – Water. Backflow prevention devices shall be installed at a location and in a manner approved by the PSU Engineering Services’ Utility Systems Engineer – Water and shall be installed by a person properly qualified. At University Park Campus, buildings shall have two backflow prevention devices installed in parallel. At University Park Campus, Apollo/Conbraco brand reduced pressure zone backflow preventers shall be furnished by Water Services for installation by the contractor on the potable water service, and billed to the Project at cost. The backflow prevention device(s) must be ordered from Water Services at least thirty (30) days prior to the planned installation. Reduced pressure backflow preventers shall not be located in pits or other areas that can fill with water unless previously approved by PSU Engineering Services’ Utility Systems Engineer – Water. Backflow prevention devices shall be located on the building side of the water meter, as close to the meter as is reasonably practical and prior to any other connection. Refer to Water Meter and Backflow Preventer Detail for the applicable conditions in .04 Guideline Details. At University Park, backflow prevention device(s) shall be inspected and tested by Water Services prior to service activation.
- An ASSE certified double check valve shall be installed on each fire service. Double check backflow prevention devices shall comply with AWWA Standard C510 (latest version), and have FM Global Approval. At University Park Campus, Ames Fire & Waterworks Model 3000SS brand double check backflow preventers. Fire service backflow preventers shall NOT be furnished by Water Services, regardless of location. At University Park, backflow prevention device(s) shall be inspected and tested by Water Services prior to service activation.
- Constant Pressure Pumps
- See Division 22 00 00.
- Operation and Connection to Existing Waterlines
- The operation of all existing water valves and hydrants shall be performed only by University’s Water Services Operators. The Contractor and any other personnel are expressly forbidden from operating the water system components.
- At University Park, all connections to existing waterlines shall be done by the University. These connections shall be done as follows: The Contractor shall provide all required fittings, excavate a pit of sufficient size to install the tapping machine, provide shoring, as required, to comply with U.S. OSHA Standards, provide equipment to place and remove the tapping machine, backfill the excavation after the tap is made, restore the surface area, and pay the University a fee for the tap. The fee shall be based on the actual cost incurred by Water Services, including, but not limited to manpower, materials, and equipment; and billed to the Project at cost. The University will provide the tapping machine and perform the tapping, and/or the connection to the existing waterline.
- At all Penn State locations other than University Park, connections to existing waterlines shall be done by the contractor, but only in the presence of PSU Office of Physical Plant staff.
- Temporary Water Service
- Temporary service is defined as a water service provided for events, food vending, construction, or maintenance supplied from a building or hydrant using temporary piping for 30 days or less. Nonpermanent service (greater than 30 days) will be addressed and approved by the Office of Physical Plant, Engineering Services’ Utility Systems Engineer – Water, on a case-by-case basis.
- The Pennsylvania State University, Water Services, will provide customer hook-up to an existing source such as a building hose bibbs or fire hydrant, including a reduced pressure principal (RPZ) backflow preventer, and water meter.
- The University will ensure proper disinfection by sampling at the existing hose bibb for chlorine residual and coliform bacteria prior to customer use of the water.
- It is the customer's responsibility to ensure that proper disinfection continues from the existing hose bibb to their equipment and to the consumer. The University will provide a procedure with recommendations to the customer to ensure proper disinfection.
- The temporary tap and sampling costs will be the responsibility of the customer.
- System Tests and Disinfection
- All water lines and services shall be hydrostatically tested to conform to AWWA C-600 (latest version). Water Services and PSU Engineering Services’ Utility Systems Engineer – Water shall be notified of the testing a minimum of three (3) business days prior to the testing to allow scheduling for observation of the testing. At University Park, all hydrostatic tests must be observed and approved by Water Services personnel. At locations other than University Park Campus, all hydrostatic tests must be observed and approved by University Personnel.
- Disinfection shall conform to AWWA C-651 (latest version). Contractor shall retain the services of a PA DEP certified water testing laboratory to sample and test the potable water system. The water line must be thoroughly flushed after disinfection and achieve ambient free chlorine residual concentrations prior to collecting the sample. Water Services shall be notified of the testing a minimum of three (3) business days prior to the testing to allow scheduling for observation of the testing and perform chlorine residual testing. At University Park, all flushing and sampling/field tests must be performed by Water Service Personnel. At locations other than University Park Campus, all flushing be performed by University Personnel and sampling/field tests must be observed and approved by University Personnel. All test results shall be provided to Engineering Services prior to activation of services by Water Services at University Park or University Personnel at other locations.
- Meter and backflow prevention device(s) shall be inspected and tested by Water Services prior to service activation by Water Services.
- Professional shall carefully review and edit the guideline installation details below, adapting them as needed to achieve application-specific, fully developed details for each project.
|PSU Water Service and Water Line Ext Plan Approval Req.pdf
||Requirements for the submission of plans for new water services and water lines.
|33 10 00 Boring & Encasement Piping Detail.pdf
33 10 00 Boring & Encasement Piping Detail.dwg
||Design detail requirements for boring and encasement piping for water lines.
|33 10 00 Air Release Detail.pdf
33 10 00 Air Release Detail.dwg
||Design detail requirements for air releases and vacuum breakers on water lines.
|33 10 00 Blow-off Detail.pdf
33 10 00 Blow-off Detail.dwg
||Design detail requirements for blow offs and flushing piping.
|33 10 00 Waterline Trench Detail in Paved Areas.pdf
33 10 00 Waterline Trench Detail in Paved Areas.dwg
||Design detail requirements for Waterline Trenches in paved areas.|
|33 10 00 Waterline Trench Detail in Non-Paved Areas.pdf
33 10 00 Waterline Trench Detail in Non-Paved Area.dwg
||Design detail requirements for Waterline Trenches in non-paved areas.|
|33 10 00 Trench Plug Installation.pdf
33 10 00 Trench Plug Installation.dwg
||Design detail requirements for trench plug/clay dike installation of water lines over 300 feet in length
|33 10 00 Deadman Detail.pdf
33 10 00 Deadman Detail.dwg
||Design detail requirements for reinforced concrete deadman piping on existing cast iron water lines.
|33 10 00 Fire Hydrant Installation & Relocation.pdf
33 10 00 Fire Hydrant Installation & Relocation.dwg
||Detail design requirements for the installation of fire hydrants.
|33 10 00 Domestic Meter-Backflow Assembly Detail.pdf
33 10 00 Domestic Meter-Backflow Assembly Detail.dwg
|October 2013||Design detail requirements for the install of water meters and backflow preventors on building water services for domestic services.
|33 10 00 Fire Domestic Meter-Backflow Assembly Detail.pdf
33 10 00 Fire Domestic Meter-Backflow Assembly Detail.dwg
||Design detail requirements for the install of water meters and backflow preventors on building water services for domestic/fire services.
- At University Park, the University supplies the University Park Campus, the Research Park, and Mount Nittany hospital drinking water from deep wells located on PSU property near campus. These wells produce very high quality water at pumping rates from 200gpm to 1200 gpm per well. The University considers these wells a valuable resource that must be protected. In addition, the University Park water withdrawal is regulated by the Susquehanna River Basin Commission and its rules and regulations. All well drilling activity shall comply with SRBC regulations.
- In keeping with its focus on environmental stewardship, the University considers groundwater a valuable resource that must be protected at all locations, not just those where groundwater is used for potable water services.
- Any project that is considering geothermal, production, test or monitoring wells shall meet the following:
- The Project shall retain the University’s registered geologist during the early planning phase to determine the feasibility of installing geothermal wells, and set preliminary limitations on wells drilled within the project area.
- If geo-thermal wells are feasible, the Project can retain another registered geologist to provide a Drilling Plan.
- No drilling shall be done before this Plan is approved by Engineering Services.
- All drilling shall be under the direction of a registered professional geologist.
- The Plan shall include but not limited to the following as a minimum:
- Details of the exploratory and finished wells.
- Number proposed
- Proposed location
- Proposed depth
- Proposed construction: The Plan must address how the drilling contractor will deal with conditions such as lost circulation during drilling and loss of grout during the grouting operation.
- Material used in the construction and chemical composition of all material used in the well.
- Name and contact information for the drilling contractor.
- Proposed dates of drilling.
- Name and contact information of the geologist representative that will be on site during drilling.
- All open drill holes shall be equipped with a locking cap.
- Abandonment Plan for test wells in the event geothermal wells are deemed to be infeasible.
- Upon completion of the drilling, drilling logs for each well shall be provided to Engineering Services. Electronic copies are encouraged. The drilling log shall include the following: description of geologic material encountered (limestone, dolomite, etc.), depth to competent bedrock, static water level, depth and flow rate of water bearing zones, depth interval of voids or significant fracture zones, depth interval and diameter of boreholes, casings (both inside and outside).
- If an exploratory/test well is completed, the results shall be provided to Engineering Services along with any changes to the approved Drilling Plan resulting from data collected from the test well.
.01 Sanitary Systems
- Collection Systems
- Provide manhole at change of directions. Note: See Manhole Details 15G-A and 15G-B. Details are not yet available in WEB-based manual.
- Sanitary sewer lines shall be either PVC, vitrified clay, or ductile iron. All pipe shall have a premium watertight joint.
- Minimum size storm and sanitary lines shall be six (6) inch.
- All storm and sanitary lines shall be a minimum of 4 feet below grade and backfilled on the bottom and sides of the pipe to a height of one foot above the top of the pipe with PennDOT 2A Stone. The remaining backfill material shall be earth, free of wood, ashes and other debris, but may contain rock pieces not larger than one cubic foot in volume, but consisting of not more than twenty-five percent rock by volume. No other material shall be used as backfill.
- All sanitary manholes shall be tested to establish no infiltration using either a hydraulic or pneumatic test. All sanitary sewer lines shall be tested to establish no infiltration using a low pressure air test. Coordinate with Engineering Services.
- Provide clean-outs on building sanitary sewer laterals at changes in direction and at maximum intervals of 150 feet.
- House Traps
- House traps are not required unless a specific request is made by the codes official.
- Sanitary Manholes.
- Manholes shall be provided at changes in direction.
- Manholes shall be fitted with non-locking type or locking type (as required by service and indicated on drawings) heavy frame and cover. The type of service shall be cast in each cover in three (3) inch high letters.
- Provide manholes with cast-in-place rungs made of aluminum conforming to ASTM B221, alloy 6061T-6. Coat the embedded ends of aluminum rungs with two coats of bituminous paint. Space rungs 12" center to center. Steps shall be 12" wide with five (5) inch projection from the wall and 4 1/2" projection into the wall.
- Manholes shall be reinforced precast concrete and conform to ASTM C-478. Provide suitable rubber gasketed joints which meet ASTM C443 between sections. Manhole bases shall be cast-in-place concrete. The top section of the manhole shall be of the eccentric cover type so that manhole steps form a straight ladder, for manholes 5'-0" and deeper. Openings required that are not cast in the manholes must be machine core bored.
- Provide invert channels of cast-in-place 3500 psi concrete. The channel shall be smooth and accurately shaped to conform to the inside surfaces of the incoming and outgoing pipes.
- Provide outside drop connections where the difference between the inflow and outflow elevation exceeds 2'0". Encase the drop pipe and fittings in 3,500 psi concrete.
- Joining of pipes to manholes shall be made thru rubber gaskets cast integrally in the manhole wall and located as required. Joints shall meet the requirements of ASTM C443 and ASTM C425.
- Refer to Details 15G-A and 15G-B (15G changed to Division 33). Details are not yet available in WEB-based manual.
- Oil/Water Separators
- Oil/water separators shall be used wherever mandated by Federal, State, local, or University criteria. Under no circumstance shall any oil/water separator be installed without being reviewed by Engineering Services.
- The use of enzymes or chemicals shall not be permitted without the approval of the required regulatory authority.
- Oil/water separators shall discharge to the sanitary sewer.
- Operations and Maintenance (O&M) manual shall be provided to the University for any Oil/water separator. The O&M manual will also include design assumptions used, sizing computations, and recommended cleaning schedule.
- Refer to section 33 56 00.
|Fox Hollow Drainage Basin Stormwater Management Design Manual
|This manual includes technical standards and criteria that apply to the development of a Storm Water Management Plan (SWMP) for all land development activities within the University Park Campus Fox Hollow Drainage Basin. All Projects that impact the land areas or drain to the Fox Hollow Drainage Basin (area as defined in this manual) shall conform to the requirements listed herein.|
|Penn State Stormwater Management Summary||
|All projects that have stormwater must submit this form completed to Engineering Services.|
|Penn State Stormwater Operations and Maintenance Summary Sheet||
|All projects that have stormwater BMPs (structural and non-structural) must submit this form completed to Engineering Services.|
|Penn State Stormwater Green Roof Summary Sheet||
|All projects that have green roofs must submit this form completed to Engineering Services.|
.01 Stormwater Systems Performance Standards
- Stormwater Management
- Design Requirements
- All projects that modify land cover, land use, hydrologic condition, or modify existing drainage patterns, no matter what size, must consider stormwater management with the goal of improving existing stormwater conditions and preventing new flooding and/or impairments.
- All projects shall include a stormwater management plan that meets the requirements of the most recent applicable municipal stormwater management ordinance.
- Projects that trigger a National Pollution Discharge Elimination System (NPDES) permit for earth disturbance activities shall also meet applicable PaDEP stormwater requirements; however, the methods used to meet PaDEP volume requirements must be pre-approved by OPP’s Division of Energy and Engineering, Engineering Services (from here on referred to as Engineering Services).
- Under no circumstances shall surface water be directed towards a building. All designs shall include gravity flow away from building entrances in the event that all inlets are clogged.
- The University has developed peak runoff rate requirements that exceed local and State regulations in some University Park Campus drainage basins, which must be adhered to as indicated below. Where the University’s special requirements below are triggered, but would not normally trigger a submission to the municipality, the design will be submitted directly to Engineering Services for review and approval.
Main Campus Drainage Basin: In the entire Main Campus drainage basin, all redevelopment projects over 0.5 acres of total disturbance shall assume that 100% of the existing impervious areas are meadow in good condition for the consideration of peak runoff rate computations for determining extended detention storage requirements, when there is a land use/cover change proposed. Computations for water quality or volume shall use existing impervious areas. Any project that increases imperviousness by 1,000 sf shall provide peak runoff rate control for the new imperviousness (refer to section 33 40 00.01.B.5 for design guidelines). Using impervious area credits in the Main Campus drainage basin are prohibited.
Fox Hollow Drainage Basin: Any project upslope of storm manhole #252 (STMH252) located at the intersection of Park Ave and Shortlidge Road in the Fox Hollow drainage basin over 1.0 acre of total disturbance shall assume that 100% of the existing impervious areas are meadow in good condition for the consideration of peak runoff rate computations for determining extended detention storage requirements, when there is a land use/cover change proposed. Computations for water quality or volume shall use existing impervious areas.
West Campus Drainage Basin: No future major development is permitted within the pond’s drainage area without the West Campus Pond being improved or reconstructed. Major development is defined as any “new” building, building addition, parking lot, or road. Only minor sidewalk work or maintenance activities will be permitted without triggering this requirement.
Bathgate Drainage Basin: The Bathgate dam was designed as a drainage basin peak runoff rate and water quality control facility and currently has reserve capacity. All increases will be tracked by Engineering Services and proposed impervious area must first be approved in writing by Engineering Services.
- The University promotes foremost the use of conservation design practices that preserve and use natural critical hydrologic areas, including, but not limited to, floodplains, wetlands, streams, minor drainageways, natural recharge areas, carbonate closed depressions and sinkholes. Therefore, site designers shall make every effort to preserve these areas, and any disturbance is only permitted at the approval of Engineering Services.
- Filling in low areas or closed depressions to spoil project fill or remove ponding in natural or landscaped areas is discouraged and is only permitted at the approval of Engineering Services.
- The University promotes the use and application of sound science in our stormwater management practices and Low Impact Development (LID) practices where appropriate; however, it does not believe that every BMP or LID method can be used anywhere, or that we can engineer replacements to complex natural hydrologic areas. Therefore, site designers shall set up a pre-design kick off meeting with Engineering Services to determine what stormwater practices are permitted in the project area.
- Adequate treatment must be accomplished prior to stormwater runoff being injected into an engineered infiltration BMP or areas where infiltrated runoff can rapidly bypass the soils and enter fractures or the groundwater. Water quality pretreatment facilities must be visible and accessible to provide a means to monitor their efficiency, and replace if necessary in case of failure.
- Construction practices must be utilized so as to minimize the compaction of existing soils. In addition, a) soil at grade should be managed and b) vegetative cover and organic amendments should be utilized to enhance the restoration of infiltration capacity of disturbed soils. However, the use of soil amendments or restoration as a NPDES permitted activity that would be required for perpetuity under a NPDES permit is prohibited. In other words, soil protection or amendments are encouraged, but they shall not be made part of a NPDES permit.
- The University’s recommended practices for land development activities shall be based on a thorough understanding of the watershed, soils, geology, site density, existing conditions, and the local regulatory requirements. Examples of recommended practices are available for the University Park Campus from Engineering Services.
- The use of porous (asphalt) pavement is prohibited at the University Park Campus for parking lots, driveways, or roads. Porous (asphalt) pavement may be used for recreational surfaces, such as basketball courts, if approved by Engineering Services.
- Stormwater use will be evaluated for projects using the University’s Drainage Basin Stormwater Management Design Manual.
- The use of structural stormwater best management practices that replace existing subsoils with inert material or gravel are discouraged unless it can be documented that the remaining soils are stable and can renovate pollutants in the stormwater.
- Engineering Services will determine the level of acceptable risk on all University Park Campus projects for ponds, bioswales, rain gardens, or other volume control facilities; and if the facility should be lined or unlined.
- Where multiple stormwater BMPs are used on a project site, only those BMPs specifically required to meet NPDES permit requirements will be included as part of the permit. The plans and PCSM reports will clearly state which practices are voluntary and can be removed or replaced by the University at will.
- Where storm drain conveyance systems are undersized, the University will not simply increase pipe sizes to solve the problem. Such actions are counterproductive to the goals of the University and result in pushing more flooding downstream (flood transference) to both University and non-University properties. In these cases, detention storage or other methods will be used to reduce overall peak runoff rates.
- All stormwater management final reports and plans shall be provided directly to Engineering Services by the design professional within 30 days after the approval by the reviewing agency. In addition to the stormwater reports required by a municipality and/or PaDEP, the professional must fill out and submit the Penn State Stormwater Management Facility Summary Sheets, and the Penn State Green Roof Summary Sheets, if applicable. Final payment can be held until documentation is received.
- Digital as-built surveys in AutoCAD format of all stormwater management facilities, including but not limited to, surface ponds, underground detention facilities, BMPs, and conveyance pipes will be provided directly to Engineering Services.
- All stormwater BMPs need to be properly installed, operated, and maintained. The professional shall provide the University with copies of all stormwater Operations and Maintenance Manuals. Additionally, the designer shall fill out the Penn State Stormwater Operations and Maintenance Summary Sheet, for each BMP.
- All copies of NPDES stormwater facilities certifications of critical BMPs shall be provided directly to Engineering Services by the design professional.
- Copies of all approvals of testing required by these standards shall be submitted directly to Engineering Services by the design professional.
- As a nationally recognized institution of higher learning, the University requires comprehensive computations that defend a design’s function above and beyond those required for regulatory approval in order to protect health, safety, and welfare. Fox example, where a stormwater BMP is designed using PaDEP worksheets to meet regulatory requirements, the designer is still required to provide comprehensive hydrologic and hydraulic computations and a summary of the BMP’s permitted volume, and the drainage basin characteristics including overall imperviousness that drains specifically to the BMP.
- Collection Systems
1. Pipes, Culverts and, Conveyance Systems
- All storm pipes, culverts, conveyance channels, and appurtenances shall conform to Pennsylvania Department of Transportation Standards for Roadway Construction (RC), and Publication 408 specifications with exceptions as noted below.
- Storm drain pipe and culvert material shall be either corrugated metal pipe (CMP), reinforced concrete (RCP), duel walled high density polyethylene (HDPE), polyvinyl chloride (PVC), high performance polypropylene (HPPP), or ductile iron pipe (DIP). CMP is only permitted to be used to match existing CMP systems. If CMP is used, a minimum of 14 gauge shall be used and the pipe must be coated with bituminous or aluminized, and use gasketed pipe collars. PVC pipe is only permitted up to 10” in diameter. HDPE is prohibited for roof drains or in diameters smaller than 12” in diameter unless perforated pipe is being used. Single wall polyethylene is prohibited except for athletic field drain line applications.
- Storm drain pipes inside occupied structures shall be in accordance with the most recent building codes.
- Pipe material used for pipes or culverts greater than 24” diameter shall be at the exclusive direction of Engineering Services and RCP should always be initially assumed from an initial cost estimate perspective.
- Ductile iron pipe (DIP) shall be used for storm drains wherever storm drains cross steam or condensate lines closer than 3’-0”. The DIP shall run from structure to structure.
- Reinforced concrete pipe (RCP) shall be used for all pipes crossing roadways, except where steel casings are used.
- All pipes shall have watertight joints, except where the pipes are intentionally perforated. Pipes considered “soil tight” by the manufacturer are prohibited.
- Wherever possible, the pipe material and diameter shall remain constant between inlets and/or manholes.
- The minimum size storm drains conveyance lines shall be fifteen (15) inch, with the exception of underdrains, BMP distribution systems, and properly sized roof leaders. Where the lines tie into a smaller existing downstream storm drain, the storm drains can be reduced to a minimum size of eight (8) inches.
- The minimum pipe slope for new storm drains shall be 0.5% (0.005ft/ft). The crowns of all storm drain lines shall be a minimum of 2 feet below grade and meet manufactures depth recommendations.
- Any structure placed on an existing storm line equal to or greater than a 24” diameter, or an existing RCP pipe shall use a “dog box” structure. Under no circumstance shall these pipes be cut and repaired for the structure installation without the written approval of Engineering Services.
- Foundation or footer drains are prohibited from tying directly into storm lines unless it can be guaranteed that backwater conditions in the storm lines cannot back flood the drains.
- Trench plugs are to be included along storm lines as required to prevent the migration of water along the pipe bedding. Impervious trench plugs should be employed prior to any utility entering a building underground.
- All pumps, including sump pumps, are prohibited on the storm drain system with the exception of sump pumps located inside buildings.
- Some storm drains may require exfiltration testing where there are known sinkholes. Coordinate with Engineering Services.
- Provide cleanouts/inspection ports at the end of all pond, bioswale, or rain garden underdrains.
- All storm pipe or culvert outlets must have stable erosion resistant energy dissipaters. Where hydraulically possible, outlets should use sumped pre-formed scour holes.
- Any new storm culvert or pipe outlet must have a concrete endwall and/or endsection.
- All storm drain hydraulic computations must be done in accordance with the Federal Highway Administration’s Urban Drainage Design Manual, Hydraulic Engineering Circular No. 22 (HEC-22). Hydraulic grade lines for all new storm drain lines must be computed and included in final stormwater management reports.
- All new minor storm drains shall be designed to pass the 10-year event discharge without surcharging. Surcharging is defined as the maximum permissible water surface elevation in a manhole or inlet one (1) foot below the top of grate elevation.
- All new major storm drains (generally greater than or equal to 24” diameter) shall pass the design event defined by Engineering Services.
- Vegetated stable open channels shall be used whenever possible. All channels greater than or equal to 10% slope shall be designed by shear stress methods.
2. Storm Inlets and Storm Manholes
- All inlet and manholes criteria shall conform to Pennsylvania Department of Transportation Standards for Roadway Construction (RC), and Publication 408 specifications with exceptions as noted below.
- The maximum spacing between storm drain manholes or inlets shall be 300 ft.
- Inlet spacing on new roadways in curbed sections should be based on an allowable spread of ½ the travel lane or a maximum of 6’ during a 10 year return period event.
- All storm drain inlet grates located in travel areas or lawns to be PennDOT bicycle safe.
- Inlets shall not contain weep holes.
- All yard drains, including those in landscaped areas, shall be concrete with minimum interior dimensions of 12” x 12” and shall be H20 load rated. Yard drains located in landscaped areas with material other than concrete shall be used only when approved by Engineering Services.
- The use of plastic combination yard drains/pipes are prohibited except for use as single yard drains or in minor landscaped areas. Where used, the designer must still provide for rover type camera access from at least one side of the pipe run.
- All storm drain structures including manholes and inlets deeper than four (4) ft shall have access steps per the PennDOT Roadway Construction standards, and Publication 408 specifications. The top step shall be a maximum of 18” from the top of grate/manhole cover.
- Provide manholes or inlet boxes at all horizontal or vertical changes of direction for storm drain lines except for roof leader collection systems made from PVC or ductile iron. Roof leader systems will provide cleanouts at every other bend or junction. Where a project conducts work in an area that existing blind connections exist, reasonable effort should be made to install a structure to remove the blind connection.
- All manholes and inlet boxes shall have a smooth flow line channel formed of cast-in-place 3500 psi concrete for all storm drains 24 inch or larger. The channel shall be smooth and accurately shaped to conform to the inside surfaces of the incoming and outgoing pipes for ½ the pipe diameter.
- Under certain conditions, Engineering Services may request 24 inch manhole covers be placed on inlet boxes.
- Under no circumstance is an inlet or manhole permitted to be buried (prohibiting access) without the approval of Engineering Services.
- Sumped inlets on roads or other critical areas should have at least one flanking inlet in the event of clogging.
- Under no circumstance is spray foam to be used anywhere near a storm drain structure. Where used “temporarily” by the contractor, all foam must be removed prior to backfill.
- A maximum of three riser sections are permitted on inlets or manholes. Only one layer of bricks and mortar is permitted for grade adjustment.
- The use of porous concrete bricks is strictly prohibited on any storm drain structure for any purpose. All bricks must meet AASHTO M91.
- All structure openings shall be sealed with AASHTO M91bricks and parged on both sides.
- Manholes shall be fitted with 30” diameter non-locking type or locking type (as required by service and indicated on drawings) heavy frame and cover. The word “STORM” shall be cast in each cover in three (3) inch high letters.
- Openings required that are not cast in the manholes must be machine core bored if concrete. All material that falls into a manhole or inlet due to a penetration must be removed. Utility Services reserves the right to bill contractors for material not removed or that may be carried down pipes.
3. Water Quality Inlets and Hydrodynamic Devices
- Specialized water quality inlets or hydrodynamic structures (such as CDS units, Baysavers, Stormceptors, Ecostorm Plus, Snouts, etc.) are permitted to meet water quality criteria; however, they must be constructed water tight. Structure leakage will be tested by OPP.
- Concrete septic tank type systems are permitted for use where appropriate. Structure leakage will be tested by the contractor per section 33 40 00.01.C.2.
- Permanent inlet bags or basket type inlet inserts are prohibited without the written approval of Engineering Services.
- Under no circumstance are systems that use replaceable filters, cartridges, or replaceable soil media, etc. to be used for any project.
- Structural plant type systems (such as Filterra, BioFilter, Modular Wetlands, etc.) are permitted to be used on Campus with the approval of Engineering Services; however, they will never be included as a permanent component of an ordinance requirement or NPDES permit.
- All water quality inlets and hydrodynamic devices must be accessible on a permanently stabilized surface by vacuum trucks that are the approximately the size and weight of a fully loaded concrete truck.
4. Oil/Water Separators
- Oil/water separators shall not be used for stormwater management systems except at the direction of Engineering Services. Refer to sections 33 30 00.01.P and 33 56 00 if required.
5. Subsurface Detention Facilities
- The layout and design of all subsurface detention facilities shall be reviewed by Engineering Services prior to being submitted to outside review agencies.
- Under no circumstance are any plastic built up types of detention structures permitted with or without liners.
- All subsurface detention facilities at the University Park Campus are to be constructed from reinforced concrete (Class 3 minimum pipe) or approved equal. Only Engineering Services is permitted to determine what constitutes an approved equal.
- All subsurface detention facilities are to have access points located on each end of the facility. Access points are to be a minimum of 24” diameter manhole cover or 2ft x 4ft inlet grate. Larger facilities (generally greater than 20ft x 50ft) should have an access point at each corner.
- The hydraulic control weir should preferably be part of the subsurface detention structure. Contact Engineering Services for typical examples.
- The control weirs are to have an access immediately on both sides of the weir for cleaning and maintenance.
- Any low flow orifice 3” or smaller shall have a trash rack per the University’s standards. Contact Engineering Services for acceptable trash rack types and details.
- All subsurface detention systems must be accessible on a permanently stabilized surface by vacuum trucks that are the approximately the size and weight of a fully loaded concrete truck.
- All subsurface detention systems are to be water tight as defined in 33 40 00.01.C.2. and will be tested by OPP.
- The University has a pre-designed subsurface detention system for peak runoff rate control of impervious drainage areas from 1,000 sf to 1,500 sf with a total contributing drainage area of less than 2,500 sf. The designer is permitted to use this standard facility without conducting hydrologic and hydraulic routings and computations. Any area greater than 1,500 sf of imperviousness or 2,500 sf total area will require an analysis by the engineer; however, the pre-designed facility concept may be used. Contact Engineering Services for details and the performance calculation summary design requirements which are included in the Water Resource Publication OPP-WRP-SR-SUB:2017.
- Acceptance and Inspection
- The design engineer is to conduct a comprehensive punch list of all storm drains components visible from the ground surface including the interior of manholes, inlets, and other structures. The design engineer is not required to enter confined spaces unless previously arranged as part of the contract scope of work. A copy of the punch list and corrective actions completed are to be provided to Engineering Services.
- Subsurface detention systems will be inspected internally by Utility Services or Engineering Services. Deficiencies will be provided to the design engineer for inclusion in the punch list record.
- All storm drain pipes will be inspected and accepted by Utility Services from interior camera inspection after the pipe has been installed and backfilled to approximately final grade for 30 days. Deficiencies will be provided to the design engineer for inclusion in the punch list record. The contractor is to coordinate with Utility Services for on-site access. Approval or rejection of storm drains will be based on the following standards, which must be included on the construction document plans or specifications.
· The maximum allowable deflection of the storm pipe shall be 5% of the pipe’s internal diameter.
· Any pipe belly greater than 1” deep will be rejected.
· Any adverse (negative or uphill) slopes will be rejected unless installed by design, or with written approval and acceptance by Engineering Services. Under no circumstance are designers, construction representatives, or other University staff permitted to authorize adverse sloped storm pipes at utility or other conflicts.
· Any new storm pipe damaged and repaired by any method other than approved by the manufacturer will be rejected. In all instances, OPP reserves the right to submit the information to the manufacturer to determine if they stand by the original warranty following the damage.
· Any joint not completely seated or where bedding material can be observed at or inside the joint will be rejected.
· Any joint observed to leak trickle flows will be rejected.
· Any joint with an offset elevation or misalignment where the downstream pipe can obstruct flow or trap material will be rejected.
· Any blind connection type joint where a manufacturer approved saddle tee or fitting has not be used will be rejected.
2. Subsurface Detention Leak Testing
- All subsurface detention systems at the University Park Campus will have their water tightness measured by Engineering Services over a minimum of 48 hours during periods of no precipitation. Engineering Services will provide the design engineer with the processed elevation data for a final leakage acceptance determination, which is made by the design engineer. The permissible leakage rate for all concrete systems is defined as 1x10-5 cm/sec over the entire system. The permissible leakage rate for all plastic pipe systems shall be based on ASTM D3212 and shall be measured in the field as meeting a leakage rate less than 1x10-6 cm/sec over the entire system. Leakage tests are to be conducted at a minimum depth of 12” deep at the shallowest end. Stormwater or potable water may be used for the test and the contractor will be required to fill the structure with water. If potable water is used, it will be tested by the contractor for zero residual chlorine before being released into the storm system. The contractor will also be responsible for plugging the outfall and providing access during testing.
- Concrete septic tanks used for small subsurface detention systems will be tested by the contractor using the vacuum testing method in ASTM C-1227. The contractor will coordinate with Utility Services to have the test observed and verified.
3. Critical Stormwater BMP Certifications
- Any stormwater BMP installed as part of a NPDES permit and requiring a Final Certification of the Licensed Professional for inspection of critical stages of implementation associated with the approved PCSM Plan must be submitted to Engineering Services along with Appendix A of the NPDES Notice of Termination Form at the end of the project and prior to final payment.
- Underground natural gas systems at University locations may be owned and operated by either the University, or by the local natural gas distribution company. At some locations, both conditions may exist.
- University owned gas piping network on University Park Campus is carried at 5 psi. Gas is natural with heating value at 1050 btu/cu. ft. Parts of the system owned by Columbia Gas of Pennsylvania will be carried at 35-50 psi.
- At all locations consult with Engineering Services for gas system ownership and procedures to be followed.
- Distribution Systems
- All underground pipeline installations will be in accordance with the U.S Department of Transportation, Pipeline and Hazardous Materials Safety Administration, Pipeline Safety Regulations Part 192, Transportation of Natural and Other Gas by Pipeline: Minimum Federal Safety Standards and the International Fuel Gas Code.
- All contractors installing underground pipelines must be certified under the Pipeline Safety Regulations Part 192 and will provide copies of the certification to the University.
- The design professional will provide gas loads and pressure requirements to Engineering Services for meter and regulator sizing. The meter and regulator will be provided by the University and the contractor will perform the installation.
- The piping material to be used will be determined by Engineering Services.
- When it is determined in a project that a pipeline owned by the local gas distribution company will be within the contract limits of that project a site utility drawing will be provided to the company for review and comment.
.01 Underground/Aboveground Storage Tank Design
- EHS shall be contacted to provide guidance in the planning and design of facilities that include any new aboveground or underground storage tanks or modification/replacements of any existing tanks. This includes tanks that are used for petroleum products and other oils as well as those used for other hazardous materials (i.e., caustic soda). Site-specific requirements will be provided by EHS.
- All new fuel storage tanks shall be aboveground, unless specifically reviewed and approved by EHS.
- All new tanks shall have a Spill Prevention, Control, and Countermeasures (SPCC)Plan or a Preparedness, Prevention and Contingency (PPC) Plan prepared under the direction of EHS.
- Provide a copy of equipment, materials and installation details submittals to EHS in timely manner for review prior to installation.
- All tank installations shall provide complete startup and training services coordinated and scheduled well in advance with Owner’s representative(s) to attend. Obtain certification that startup and training was completed with Owner’s representative signature(s) and submit completed certification of training to Project Manager.
.02 Aboveground Storage Tanks
- Provide aboveground storage tank installations in accordance with current EPA, DEP, Department of Labor and Industry Flammable and Combustible Liquids Section (or Philadelphia or Allegheny County, where they take precedence), township/borough requirements (where applicable), NFPA, and EHS requirements.
- Contractor shall be required to provide the University with necessary Department of Labor and Industry Fire Safety Permit and DEP Storage Tank Registration, where applicable.
- All new aboveground stage tanks shall meet the appropriate UL standard.
- Tanks shall be set on a concrete pad to prevent the settling of the tank. The pad shall be in accordance with the tank manufacturer’s recommendations.
- All aboveground storage tanks shall have secondary containment, fill drop tube, spill prevention, overfill prevention, and mechanical leak detection (electronic monitoring/alarming not required).
- Any work on DEP regulated aboveground storage tanks shall be performed by DEP certified tank installer/inspector.
- “No Smoking” and “Stop Motor” signs shall be posted in all fuel dispensing areas, and a “No Smoking” sign shall be displayed on the tank. Fuel pumps and aboveground storage tanks shall be protected from vehicles with bollards. If the tank is to be located in a trafficked area, bollards shall be installed around the tank.
- Bollards shall be 6” diameter standard strength steel pipes filled with concrete, with rust inhibiting coating on entire exterior surface. Bollards shall be securely at least 3 feet into the ground, 4 feet high, 4 feet apart, set at least 2 feet from the shell of the tank. If the tank is located in a grassed area away from travel lanes, bollards shall not be required.
- Contents of the tank shall be identified on the tank exterior, and all ports, vents, etc. shall be labeled.
- Piping (single wall) shall be run completely exposed to allow for complete visual inspection. Otherwise if piping must be enclosed, it shall be double-wall with interstitial piping space draining back to a sump monitored by an automatic leak detection system.
.03 Underground Storage Tanks
- Provide underground storage tank installations in accordance with current EPA, DEP, Department of Labor and Industry Flammable and Combustible Liquids Section (or Philadelphia or Allegheny County, where they take precedence), township/borough requirements (where applicable), NFPA, and EHS requirements.
- Contractor shall be required to provide the University with necessary Department of Labor and Industry Fire Safety Permit and DEP Storage Tank Registration, where applicable.
- All new underground storage tanks shall meet the appropriate UL standard.
- All underground storage tanks shall have secondary containment, fill drop tube, spill prevention, overfill prevention, and automatic electronic leak detection. Provide audible and visual alarms annunciated in a normally occupied space.
- All work on DEP regulated underground storage tanks shall be performed by DEP certified tank installer/inspector.
- “No Smoking” and “Stop Motor” signs shall be posted in all fuel dispensing areas, and a “No Smoking” sign shall be displayed on the tank. Fuel dispensers and pumps shall be protected from vehicles with bollards.
- Bollards shall be 6” diameter standard strength steel pipes filled with concrete, with rust inhibiting coating on entire exterior surface. Bollards shall be securely at least 3 feet into the ground, 4 feet high, 4 feet apart, set at least 2 feet from the fuel dispenser or pump.
- Contents of the tank shall be identified on the tank fill pipe and all ports, vents, etc. shall be labeled.
- Piping shall be double-walled suction piping. Interstitial space shall drain to a sump monitored by the automatic leak detection system. Piping shall not be under positive pressure.
33 62 00 CAMPUS CHILLED WATER DISTRIBUTION
- Much of University Park Campus is, or will be, served by a campus look chilled water system. The chilled water system of each new building must be designed so as to be compatible with the characteristics of the campus chilled water system.
- Coordinating building connection requirements and proposed loads with Engineering Services, Office of Physical Plant.
- Details: Refer to miscellaneous typical guideline details below. Adapt to project specific requirements.
|SK1 (AutoCAD file) (PDF Document)
||February 2012||Campus chilled water system service entrance detail for buildings that do NOT require a heat exchanger.
|Sequence of Operation||August 2012||Sequence of Operation for campus chilled water system service entrance detail for buildings that do NOT require a heat exchanger.|
|SK-2 (AutoCAD file) (PDF Document)
||March 2012||Campus chilled water system service entrance detail for buildings that require a heat exchanger.|
|Sequence of Operation||August 2012||Sequence of Operation for campus chilled water system service entrance detail for buildings that require a heat exchanger.|
Isolation Valve (AutoCAD file)
Details of a campus chilled water isolation valve installation.
Air Vent (AutoCAD file)
|Detail of a campus chilled water air vent.
Sediment Blowoff (AutoCAD file)
|Detail of a campus chilled water sediment blowoff.
| Building Wall Penetration (AutoCAD file)
|Detail of a campus chilled water building penetration.|
- Characteristics at University Park Campus
- Low pressure steam (where available) 10-12 psi summer, 5-12 psi winter; design for 5 psi.
- High pressure steam (where available) 150 psi. Pressures may fluctuate to a low of 90 psig in winter.
- Characteristics at other locations
- For characteristics at other locations, discuss with Engineering Services.
- Distribution Systems
- Steam Mains
- Use concrete trench design for steam, condensate, and compressed air. For details, contact Engineering Services. Any other types of underground piping systems must be discussed with Engineering Services.
- Expansion shall be taken up with expansion joints in manholes. Expansion joints shall be Advanced Thermal Systems Type TP2, no substitutions. Underground offsets and loops will be permitted on a case by case basis. Design piping expansion for 250 psi.
- Ball joints are not normally used. Where they must be used, because of field requirements, use the injectable packing type. Advanced Thermal Systems Series "P2" ball joint shall be used with no substitutions.
- Drip stations shall be provided at all low points and every 150'-200' of run. Refer to Division 23 22 00 for arrangement of drip station.
- Steam manholes require specific discussions with Engineering Services.
- Steam Meters
- Steam meters shall be selected and sized by Engineering Services. The professional shall provide building steam load to Engineering Services for steam meter sizing.
- Steam meters shall be provided and installed by Utility Services. Contractor shall install orifice flanges supplied by Utility Services. Location of orifice flanges shall be specified by Engineering Services. Utility Services shall install the meter transmitter. Contractor shall provide and connect power to the transmitter from the building BAS system.
- The Professional shall provide for and indicate an adequate straight run of pipe on drawings for an orifice meter installation.
- Condensate Pumps
- Condensate pumps shall be duplex, not to exceed 1,800 rpm, with alternator; both pumps to come on at high level. Discuss discharge head with the University. Install check valves to prevent circulation through inactive pump. See Detail 15G-C for piping at meter and condensate return pumps.
- Discharge shall have a ball or plug valve with memory stop to provide for pump discharge pressure adjustment.
- Steam valves shall be steel laminated seat zero leakage triple offset butterfly valves. All valves to have gear operators. Steam valves shall be ANSI Class 150 for low pressure steam and ANSI Class 300 for high pressure steam. Valves material and construction shall be approved by Engineering Services. Cast iron valves shall not be used. Acceptable manufacturers are Adams, Tricentric, Zwick and Vanessa.
- Condensate valves 2 inch and smaller shall be stainless steel ball valves; e.g., Apollo. Larger valves shall be high performance butterfly valves; e.g., Jamesbury or Keystone. Valves material and construction shall be approved by Engineering Services. Cast iron valves shall not be used.
- Compressed air valves shall be stainless steel ball valves.
- New steam distribution piping systems which connect to existing hot steam lines shall be tested as follows:
- The new system shall be installed and the ends of the lines blanked off prior to making the connection to the existing hot line.
- The line shall then be hydrostatically tested as specified and thoroughly flushed out.
- Make final connections to existing hot lines, energize, and waste condensate.
- De-energize and open and clean all dirt legs and strainers.
- (The purpose of this test is twofold: (1) To stress line under expanded conditions prior to hydro test; and (2) To knock off and then flush out as much mill scale and debris as possible.)
- Line pressure 60-80 pounds. This is central plant air and is available on most of the University Park Campus. Provide proper dryer and separator tanks with automatic blowdown piped to nearest drain, and provide refrigerated air dryer with automatic blowdown piped to nearest drain.
- Oil removal equipment must be provided in the building.
- Central air is not available at other locations.
- Distribution Systems
- Underground compressed air piping shall be fiberglass reinforced plastic (Fibercast, Centricast Plus RB-2530). Where piping passes through manholes, convert to steel with flanges.
- Piping shall have a trap, with a half-inch ss ball valve and an automatic drain located at the low point where the piping enters the building. In addition, half-inch ss ball valves with brass plugs shall be provided at all low points to bleed entrapped moisture. Provide oil filters in the lines as needed.
- All underground fiberglass piping shall have a twelve gauge stranded copper tracer wire attached to the top of the pipe.
- System Tests
- All air lines shall be tested at 100 psi air pressure for a period of four (4) hours using test connections and testing equipment furnished by the Contractor. The only permissible drop in pressure shall be that due to temperature drop.
.01 Electric (See Division 26)
See Division 27.