HAMPTON ROADS SANITATION DISTRICT CAPITAL IMPROVEMENT PROGRAM FY 2003 to 2007 PROJECT SUMMARY

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2 Nansemond Project Name Bowers Hill and Deep Creek Pressure Reducing Stations Generator Upgrades Line/PS No. Account No XXXXX-2320 VRLF No. Replacement Design Underway This project will design and construct replacements for both the Bowers Hill and Deep Creek Pressure Reducing Stations Generators. Both Deep Creek and Bowers Hill PRS's have 230 KW generators and as designed in the late 1970s have the capacity of starting and running only 2 of the 3 motors at each station. Early in the design life of the PRS's flows were probably such that only 2 of the 3 pumps, as designed, were necessary. Now that the Bowers Hill PRS is approaching capacity, the third pump is needed especially during intense rain events when I/I starts affecting the system. At the present time this additional pumping capacity is lost when commercial power is lost and the generator must carry the load. An upgrade to the Bowers Hill generator is necessary in order to use the additional pumping capacity provided by the third pump. Additionally, if we are limited to only two pumps we will be unable to effect large diversions using the Elizabeth River Crossing. Both Bowers Hill and Deep Creek PRS's are critical when diverting flows across the river. In order to not be limited to a specific flow, the same upgrade needs to be performed at the Deep Creek PRS. Cost Estimate Construction $340,000 9 % of Const. $ 30, % of Const. $ 30,000 Total $400,000 Schedule Start (mo/yr) 05/01 Duration (mo) Inspection Requesting Dept. Interceptor s Dept. Contact Bob Norris Managing Dept. Engineering Date 3/8/02 57

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4 Nansemond Project Name Carolina Road Interceptor Force Main Pressure Control Valve Line/PS No. Account No XXXXX-2000 VRLF No. New Facility Planning Underway This project will install a new pressure control valve on the Carolina Road Interceptor Force Main. The pressure control valve consists of a pressure actuated valve controlled by an upstream pressure sensor that maintains a positive pressure in the main by restricting low flow conditions. The need for a pressure control valve will become apparent once the new Carolina Road Interceptor Force Main is placed into operation. With the new larger main comes low flows and a significant increase in grade as the force main moves into the Piedmont Area away from flatter Tidewater. The control valve will help prevent the main from creating a vacuum at low flows (night conditions) by restricting flow and keeping the pipe full. Cost Estimate Construction $42, % of Const. $ 8, % of Const. $ 5,100 Total $56,100 Schedule Start (mo/yr) 01/01 Duration (mo) Requesting Dept. Interceptor s Dept. Contact Bob Norris Managing Dept. Interceptor s Date 3/11/02 59

5 Nansemond Project Name Nansemond Treatment Plant Disinfection Chemical Feed Facilities Line/PS No. Account No XXXXX-2400 VRLF No. Replacement Design Underway The purpose of this project is to convert the gaseous chlorine and sulfur dioxide facilities at the Nansemond Treatment Plants to liquid sodium hypochlorite and sodium bisulfite facilities. The project will include provision of temporary sodium hypochlorite and sodium bisulfite feed facilities; removal of ton container storage and scale facilities, gas feed equipment, emergency scrubber, and related piping, duct, and electrical from the Disinfection Building; modifications to the Disinfection Building to accommodate the installation of and access to bulk storage tanks and feed pumps; temporary and permanent chemical feed piping to the application points; and process instrumentation utilizing existing or replacement analyzers. A muriatic acid storage and feed system will be provided for scrubber cleaning. Construction will be accomplished by a contract including Disinfection Chemical Feed Facilities at both the Nansemond and Chesapeake Elizabeth Plants. This project will provide a safer means of chemical disinfection. Cost Estimate Construction $ 900, % of Const. $ 180, % of Const. $ 138,500 Total $1,218,500 Schedule Start (mo/yr) 01/02 Duration (mo) 18 Requesting Dept. Engineering Dept. Contact Bruce Husselbee Managing Dept. Engineering Date 2/12/02 60

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7 PROJECT REQUEST VIP Project Name Berkley Trunk Sewer Section M and South Norfolk Trunk Sewer Section Y Replacement Line/PS No. SG 99, SF 147 Account No. VRLF No. Replacement Not Started This project will replace of pipeline at two locations in the Berkley Section of Norfolk: 1. Berkley Trunk Sewer, Section M (SF-099) - This project will replace 1,064 linear feet of 20 inch CI force main installed in South Norfolk Trunk Sewer Section "Y" - This project will replace 48 linear feet of 20 inch CI force main installed in This section of pipeline crosses in a casing under railroad tracks at the intersection of Halifax Avenue and Bainbridge Boulevard. These two repairs are included in the same CIP project because of their close proximity and similar type of repairs. Estimate does not include over pumping. Study of project will determine if this is necessary and cost will be added at that time. The Berkley Trunk Sewer, Section M, has required four repairs in the last 10 years, each successive repair becoming more extensive. Two repairs, completed in the last five years, involved the replacement of approximately 60 LF of pipe due to inadequate remaining pipe crown thickness. These two repairs were made in the vicinity of a vented high point. The initial length of the replacement has been based on replacing that portion of the high point which could have been affected by the internal corrosion. No pipeline testing has been accomplished yet. On January 29, 2002 a leak was discovered in the end of the cased crossing under the railroad tracks close to the HRSD Bainbridge Boulevard Pump Station. The casing has been filled with concrete therefore locating the exact location of the leak in the pipe was impossible. The leak is being managed by lowering the pressure in the force main by sending it to gravity. Both of these projects need to be accomplished on an urgent basis because there are no alternate routes for the flows if a major break occurs, and the possibility of adverse impact on the system from heavy rainfall events will exist until repairs are effected. Cost Estimate Construction $205, % of Const. $ 20, % of Const. $ 20,500 Total $246,000 Schedule Start (mo/yr) 09/02 Duration (mo) Requesting Dept. Interceptor s Dept. Contact John Wade/Paul Wilson Managing Dept. Engineering Date 3/12/02 62

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9 VIP Project Name Elizabeth River Crossing Section I Replacement Line/PS No. SF 95 Account No XXXXX-2120 VRLF No. Replacement Construction Underway This project will design and replace the 1,652 linear feet interceptor river crossing force main. It will increase the size from 24-inch diameter to 30-inch diameter. This increase in diameter will match the diameter of the pipes it connects to and allow for future diversion capacity. The existing 24-inch IFM under the Elizabeth River failed in November Repairs have been completed, but the failure has raised concern about the integrity of the remaining portion of the 52+ year old force main. Russell Corrosion Consultants, Inc. was retained to investigate the cause of the failure. Their conclusion was that graphitization was a major contribution and that this was probably typical of the pipe under the river. Cost Estimate Construction $1,548,100 3 % of Const. $ 46,400 % of Const. $ 198,500 Total $1,793,000 Schedule Start (mo/yr) /01 Duration (mo) Requesting Dept. Interceptor s Dept. Contact Troy McPherson Managing Dept. Engineering Date 3/11/02 64

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11 VIP Project Name Lamberts Point Influent Reinforcement and North Trunk Section O Rehabilitation Line/PS No. SG 47, SG 53, and SG 48 Account No XXXXX-2160 VRLF No. Rehabilitation Design Underway This project consists of three parts: Lamberts Point 54 Inch Gravity: This project will rehabilitate approximately 3,414 linear feet of 54-inch reinforced concrete gravity main along Bluestone Avenue and 43rd Street to the VIP Treatment Plant in the City of Norfolk. The cost estimate for this project is based on an in-house estimate. Lamberts Point Influent Reinforcement Rehabilitation: This project will rehabilitate approximately 1,111 linear feet of 42-inch reinforced concrete pipe along Bluestone Avenue from 38th Street to 42nd Street in Norfolk. The manholes did not appear to be affected by the corrosive atmosphere and are not expected to be included in any rehabilitation effort. North Trunk Sewers Section O Rehabilitation: This project will rehabilitate approximately 1,100 linear feet of 18-inch reinforced concrete gravity main and rehabilitate manholes along Bluestone Avenue between 43rd and 47th Streets in the City of Norfolk. The cost estimate for this project is based on an in-house estimate. The first project would extend the life of this gravity line, which was constructed in CCTV inspection indicated very heavy hydrogen sulfide attack in the interior of pipe along with steel reinforcement (rebar) exposed or missing in the majority of the pipeline. This pipeline is under or adjacent to a heavily used road adjacent to ODU. This line is in virtually the same condition as the 42 inch gravity line, which experienced a failure in September Directly upstream from the 54 inch gravity line is the 42 inch gravity line. On September 16, 1999 the top of a portion of the gravity main of the second project collapsed due to interior corrosion. The failure in the top of our pipe was covered and backfilled as a temporary repair measure while the rest of this portion of the gravity main was CCTV inspected. The inspection revealed significant corrosion along the crown of the pipe for its entire length, with some areas more severe than others. In fact, some portions of the interior concrete and steel reinforcement have deteriorated to such a degree that only a thin shell of concrete on top remains as a conduit to transport sewage. As with previous failures of this type and similar inspection results, timely rehabilitation action needs to be taken to preclude future collapses. The third project would extend the life of this 18 inch gravity line, which was constructed in CCTV inspection indicated heavy hydrogen sulfide attack in the crown of the pipe, with the steel reinforcement (rebar) exposed or missing at numerous locations. The manholes are standard brick design and are in need of rehabilitation. This pipeline is under a heavily used road on the property of ODU. The 48 inch pipeline discharges into the 54 inch gravity line. Cost Estimate Construction $1,788, % of Const. $ 357,800 0 % of Const. $ 214,700 Total $2,361,300 Schedule Start (mo/yr) /01 Duration (mo) 36 Requesting Dept. Interceptor s Dept. Contact John Wade Managing Dept. Engineering Date 2/15/02 66

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13 VIP Project Name Pinners Point Flow Meter Line/PS No. Account No XXXXX-2130 VRLF No. Relocation Purchase/Negotiations Underway VDOT has a project underway that will affect the 48 inch force main near the Pinners Point portion of the City of Portsmouth. The line will have to be relocated in 3 places. While VDOT is doing their work, HRSD would like to install a flow meter in this line to measure flows. VDOT Installation costs - $70,000. Under the Master Metering Plan, staff has planned to measure this flow with the installation of a flow meter. VDOT will have to install four line stops to handle the flow during the tie-ins of the relocated segments of our line. While the relocated segment is inactive, a flow meter can easily be installed in the segment. Installing the flow meter at a later time will require two line stops which will cost HRSD an additional $80,000 to $100,000. Cost Estimate Construction $ 108,800 % of Const. $ 1,200 % of Const. $ 6,000 Total $ 116,000 Schedule Start (mo/yr) /01 Duration (mo) Meter Installation Requesting Dept. Interceptor s Dept. Contact Bob Norris Managing Dept. Interceptor s Date 3/25/02 68

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15 VIP Project Name Sanitary Sewer Project Rehabilitation Phase V Line/PS No. SG 157 Account No. VRLF No. Rehabilitation Not Started This project will rehabilitate approximately 2,206 linear feet of 18-inch extra strength vitrified clay gravity main from Bainbridge Boulevard and Livingston Avenue to HRSD's Ferebee Avenue Pump Station in the City of Chesapeake. The cost estimate for this project is based on an in-house estimate. This project would extend the life of this gravity line which was constructed in CCTV inspection indicated numerous sections of cracked and broken pipe, drop joints and joint leaks. CCTV inspection also recorded 19 direct connections in this gravity main (not including manhole connections). Most of these connections have been punched into the pipeline instead of using lateral fittings. The 9 manholes are standard brick design and are in need of rehabilitation. This pipeline is under a heavily used section of Bainbridge Boulevard. Cost Estimate Construction $328, % of Const. $ 65, % of Const. $ 32,800 Total $426,400 Schedule Start (mo/yr) 04/03 Duration (mo) Requesting Dept. Interceptor s Dept. Contact John Wade/Jeff Midgett Managing Dept. Engineering Date 3/8/02 70

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17 VIP Project Name South Trunk Sewer Section H Rehabilitation Line/PS No. SF 87 Account No. VRLF No. Rehabilitation Not Started This project will rehabilitate approximately 2,170 linear feet of 12-inch cast iron force main, which discharges from HRSD s Chesterfield Pump Station in Norfolk. This force main will be rehabilitated along Norchester Street, from Chesterfield Boulevard Pump Station to Highland Avenue. This force main passes under Interstate 264, at which point it is encased in concrete for a distance of approximately 244 linear feet. The cost estimate for this project is based on an in-house estimate. Costs include: 2,170 linear feet of $100 per linear foot = $217,000; 2,170 linear feet bypass pumping = $40,000. This project would extend the life of this force main, which was constructed in This force main has suffered one corrosion related failure in 1993 and two corrosion related failures in In each case, the physical condition of the pipe has been observed to be extremely deteriorated from both internal and external corrosion. In the two most recent failures, 5 linear feet and 14 linear feet sections of pipe have been removed and replaced. Soil conditions in this area, adjacent to the Eastern Branch of the Elizabeth River, are very corrosive. The 8-inch cast iron force main which connects to this line and was also constructed in 1947, was replaced in 1976 due to an increasing number of corrosion related failures. Cost Estimate Construction $257, % of Const. $ 51, % of Const. $ 30,900 Total $339,300 Schedule Start (mo/yr) 05/02 Duration (mo) 12 Requesting Dept. Interceptor s Dept. Contact John Wade Managing Dept. Engineering Date 3/8/02 72

18 VIP Project Name VIP Treatment Plant Grit Upgrade Line/PS No. Account No. VRLF No. Improvement Study Underway This project will evaluate and modify the VIP grit system in two phases. 1. Phase I: This phase will install two larger pumps, two fluidizers and one higher capacity classifier. This upgrade will eliminate all plugages of the grit system. 2. Phase II: This phase will purchase a second larger classifier, a larger pump and design and install the existing grit drain systems, which includes the plant drain, grit Pista tank drains and classifiers drain system, grit suction and discharge piping system, and the grit conveyance system to the dumpsters. This project will correct deficiencies with the current grit and drain systems and upgrade the grit system to handle 80 MGD maximum flow. The quantity of grit entering VIP is higher than originally designed. Removing grit to meet design specifications provides a more reliable downstream system. Cost Estimate Construction $640, % of Const. $128, % of Const. $ 77,000 Total $845,000 Schedule Start (mo/yr) 01/01 Duration (mo) 28 Requesting Dept. Treatment Dept. Contact Sami Ghosn Managing Dept. Treatment/Engineering Date 3/11/02 73

19 PROJECT REQUEST VIP Project Name VIP Treatment Plant Monitoring and Control Line/PS No. Account No. VRLF No. Replacement Not Started This project will replace existing obsolete monitoring system with a monitoring and control system. This project includes the replacement of the obsolete computer hardware/software platform, the interface software, data highway and PLCs. In addition the Solids Handling and Generator buildings will be included in the upgrade. This project will provide a reliable and improved integrated monitoring and control system. The current monitoring system is both unreliable and obsolete. Data is frequently lost and replacement parts for the system are rapidly becoming unavailable. The existing computer platform is not upgradeable and is no longer reliable or fault tolerant. The operating system and the platform that it resides on needs to be reconfigured to offer stable connectivity and fault tolerence to the system. The programmable logic controllers are obsolete and require replacement to interface with replaced hardware and software. The generator system and solids handling building need to be included in this project as they are currently not being monitored by the existing system. Cost Estimate Construction $1,440, % of Const. $ 288, % of Const. $ 172,000 Total $1,900,000 Schedule Start (mo/yr) 09/02 Duration (mo) 18 Requesting Dept. Treatment Dept. Contact Sami Ghosn Managing Dept. Engineering Date 4/12/02 74

20 VIP Project Name VIP Treatment Plant Odor Control Improvements, Phase I Line/PS No. Account No XXXXX-2210 VRLF No. Improvement In-House Review Underway This project will develop and implement solutions to the odor problems in the VIP bar screen room, administration building, primary clarifier "dog house" and grit dumpster areas. The project will include a review, design and recommendations from consultants to: 1. Eliminate unacceptably high sulfides levels from the bar screen room 2. Eliminate detectable sulfides and odors from the administration building 3. Reduce excessive odors from the primary clarifier "dog house" and grit Dumpster areas. The project will utilize consultants and a combination of in house forces and contractors to install necessary odor system modifications. Sulfide levels in the bar screen room are unacceptably high. Periodic odors and detectable sulfide levels in the administration building are unacceptable. Continuous odors and periodic high sulfide levels in the primary clarifier doghouse, and the grit classifier and dumpster rooms are a nuisance to plant staff and could at times pose potential worker safety issues. In house evaluation indicates the current system does not meet original design criteria. Cost Estimate Construction $294, % of Const. $ 59, % of Const. $ 35,000 Total $388,000 Schedule Start (mo/yr) / Duration (mo) Requesting Dept. Treatment Dept. Contact Sami Ghosn Managing Dept. Treatment/Engineering Date 3/15/02 75

21 VIP Project Name VIP Treatment Plant Water Reclamation Facility Line/PS No. Account No. VRLF No. New Facility Study Underway This project will design and construct a treated effluent polishing system to meet irrigation needs of the new City of Norfolk Golf Course. Due to the close proximity of the VIP site to the golf course and the anticipated cost savings to the City from using the polished effluent inlieu of potable water, this project appears to be an excellent opportunity for both HRSD and the City to demonstrate the viability of wastewater reuse. Scope of the project will be more specific after the study has been completed. This project will reuse treated effluent as a less expensive resource while conserving potable water. Cost Estimate Construction $ 873, % of Const. $ 174, % of Const. $ 104,900 Total $1,153,500 Schedule Start (mo/yr) /05 Duration (mo) 24 Requesting Dept. Treatment Dept. Contact Rhonda Bowen Managing Dept. Treatment Date 3/8/02 76

22 VIP Project Name VIP Treatment Plant Water Reuse Study Line/PS No. Account No XXXXX-1950 VRLF No. Study Study Underway This study is being done in two Phases. Phase I will determine the capability of spray irrigation of Golf Courses in the Tidewater Area with HRSD wastewater effluent as an alternative to potable water to establish and maintain high quality ornamentals and turfgrasses employed in golf greens and fairways. The Virginia Cooperative Extension will then develop a brochure and display explaining and promoting the beneficial reuse of wastewater effluent on golf course and other industrial turf grasses and ornamentals. A field day will be held to educate turfgrass managers and the public about the benefits of the practice. Phase II will continue to evaluate the benefits of drip irrigation of Golf Courses in the Tidewater Area with HRSD wastewater effluent as an alternative to potable water to establish and maintain high quality ornamentals and turfgrasses employed in golf greens and fairways. This phase will evaluate how much nitrogen and phosphorus fertilization rates can be reduced by applying recycled water, and evaluate whether the irrigation can be based on vegetative water needs rather than nutrient needs to determine the ability of vegetation to "clean" the recycled water of nitrogen and phosphorus. The Virginia Cooperative Extension will then develop a publication and write extensive articles explaining and promoting the beneficial reuse of wastewater effluent on golf course and other industrial turf grasses and ornamentals. A field day and other small tours will be conducted to educate turfgrass managers and the public about the benefits of the practice. This study will provide the necessary data to start a program for the use of wastewater effluent for the watering of golf courses. This will help save a scarce resource, potable water, and help eliminate the waste of another valuable resource, effluent water. Cost Estimate Construction $123, % of Const. $ 13, % of Const. $ 52,000 Total $189,500 Schedule Start (mo/yr) /00 Duration (mo) 60 Requesting Dept. Treatment Dept. Contact Rhonda Bowen Managing Dept. Treatment Date 3/8/02 77