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Appendix K: Engineering Report: Water Supply and Sewage Treatment

ENGINEERING REPORT WATER SUPPLY AND SEWAGE TREATMENT

Vista Technology Campus

Town of Bethlehem Albany County New York September 29, 2006

Prepared for: BBL Development Group 302 Washington Avenue Extension Albany, New York 12203 Prepared by: Saratoga Associates 443 Broadway Saratoga Springs, NY 12866 Project No. 2005-104.10M

Landscape Architects, Architects, Engineers and Planners, P.C.

©Copyright All Rights Reserved Saratoga Associates 2006

ENGINEERING REPORT - WATER SUPPLY AND SEWAGE TREATMENT

Vista Technology Campus Table of Contents Section 1 - Introduction ........................................................................................................................1 Section 2 - Water Supply ..................................................................................................................... 1 Section 3 - Sewage Treatment..............................................................................................................3

Appendices A ­ LOCATION MAP B ­ CONCEPT MASTER PLAN C ­ WATER DISTRIBUTION PLAN D ­ WATER SUPPLY CALCULATIONS E ­ SANITARY SEWER SYSTEM PLAN F ­ SEWAGE TREATMENT CALCULATIONS

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Section 1 - Introduction

The Vista Technology Campus (Vista) project consists of the construction of approximately 1.4 million square feet of mixed office/technology, manufacturing, retail, restaurant and hotel use in the Town of Bethlehem and New Scotland, Albany County, New York. The site is located west of New Scotland Avenue at the intersection with LaGrange Road. Refer to Project Location Map in Appendix A for additional geographic reference of the project site. > > > > > The Project consists of the following components: Retail ­ 212,220 sf. Seven (7) mixed-use buildings from 1 to 4-stories for medical offices, restaurants, hotel, bank and standard retail uses. Office/Technology ­ 491,400 sf. Six (6) buildings with 2 to 3-stories designed for technology oriented businesses. Office ­ 624,380 sf. Eleven (11) buildings with 2 to 3-stories designed for standard office use. Manufacturing ­ 72,000 sf. One (1) building dedicated to technology oriented manufacturing.

The Concept Master Plan for the Project is included in Appendix B for building identification reference. It is anticipated that full build-out of the project will occur by 2018.

Section 2 - Water Supply

Water service to the project site is proposed from the existing 12-inch diameter water main located along New Scotland Avenue. The project will be served by the Town of Bethlehem's New ScotlandMcCormack Road Water District. A small portion of the Site along the proposed frontage is currently located within the water district. An extension of the water district in Bethlehem, and into the Town of New Scotland, will be required to serve the project site. The Bethlehem water system is supported by six (6) million gallon of storage in New Salem and is supplemented by interconnection to the City of Albany water system. The Town Water Plant has the capacity to treat 5 million gallons per day (mgd). The peak daily demand for the Town is in the range of 6 mgd. Water is purchased from Albany when the demand exceeds the capacity of the Town's system. Water will be supplied to the Site from the existing 12-inch water main located on the west side of New Scotland Avenue. The main is owned and operated by the Town of Bethlehem. The Town's engineering consultants are currently evaluating the Town's water system in the vicinity of the Site. Information concerning capacity available to the Project and current usage will be made available at the completion of the study in the fall of 2006. The study will determine the need for upsizing the water main crossings from 12-inch to 16-inch at the New Scotland/Cherry Avenue roundabout and the Maher Road roundabout. The larger water mains were requested by the Town as a "betterment"

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to be included in the Route 85 Bypass construction by the NYDOT. The water study will determine the need for the 16-inch mains at the roundabouts as well as the need for a 16-inch main to serve the Vista Project and future development along the Route 85 corridor. It is proposed that two new 12-inch water mains, originating at the New Scotland and Maher Road roundabouts, serve the Project from the south and north respectively. The 12-inch onsite mains will follow the site roadway system and will be owned and maintained by the Town of Bethlehem. The 12-inch water main from the south will enter the site at the west entrance to the Site along the New Scotland Bypass extension. The 12-inch water main from the north will enter the site at the east entrance along the Bypass at the Vista Roundabout intersection. See Appendix B ­ Water Distribution Plan. The new 12-inch mains would form a looped system for the portion of the main being extended for the Project. However, the system will function as dead end system in relation to the entire Town water network. Smaller diameter service lines will branch off the main to serve the proposed buildings along the proposed public roads through the site. The creation of a localized looped system in this area will help stabilize the flow and pressure within the extended portion of the system. It would also allow for maintenance on the system with minimal interruption of water service. Hydrant flow test information in the vicinity of the project site shows a static pressure of approximately 76 psi in the main, residual pressure of 71 psi with a flow of 750 gpm. The required fire flow demand at the base of the riser, including hose stream, for a sprinklered building is 1500 gallons per minute (gpm) minimum with 20 psi at the main. Daily domestic flow for the project at full build-out is approximately 200 gpm resulting in a total demand of 1,700 gpm. The calculations included in Appendix C show that approximately 2,008 gpm is available at the first floor of the highest floor elevation on the Site (Building "E'). It should be noted that the referenced hydrant is located in front of the post office at the intersection of New Scotland and Cherry Avenue. Based on the preliminary water system data, there should be sufficient flow to serve the proposed development. The water supply analysis will be reevaluated at the conclusion of the Town's water system study. At the direction of the Town, this information will be addressed in the FEIS portion of the SEQRA Process. Based on New York State Department of Environmental Conservation criteria, plus a 20 percent increase to account for a potential increase for technology uses that may have higher water demands, the domestic average daily demand is estimated to be 36,262 gpd for Phase One and 139,156 gpd for Phase Two (including Phase One flows) or total Project build-out. The Water/Sewer Demand Table for the proposed buildings is included in Appendix C. The proposed water system will be designed in accordance with the Recommended Standards for Water Works ­ 2003. Plans and Engineering Reports will be submitted to the Town of Bethlehem and the Albany County Health Department for review and approval.

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Section 3 - Sewage Treatment

A majority of the proposed project is located within Sewer District Extension 13, Area 1 in the Town of Bethlehem. Effluent from the development will ultimately be received, treated and discharged to the Hudson River by the existing Town-owned wastewater treatment plant located at the confluence of the Normanskill and Hudson River. An extension of the existing Sewer District into the Town of New Scotland will be required to serve the balance of the Project lands. This action will require the appropriate legal process with the Towns of Bethlehem and New Scotland for extension of the existing district. The Water/Sewer Demand Calculations included in Appendix D estimate that the maximum daily flow from the development is at approximately 139,156 gallons per day (gpd). According to Town officials, there is currently excess capacity at the wastewater treatment plant. The Plant has a design capacity of 5.9 million gallons per day (mgd) and an average daily loading of only 4.5 mgd. The proposed on-site and off-site sanitary sewer system for the new development is shown on the Sewer System Map in Appendix E. The proposed system will consist of 6,175 lineal feet of onsite gravity sewer main and 3,750 lineal feet of force main in the proposed public road to service each of the buildings on the Site. Each of the buildings will utilize a lateral connection to reach the public main in the right-of way. The on-site system will include three (3) pump stations to convey effluents from the low points on the site. Pump stations will be required in the north end of the site near Building `S', near Building `D' in the east side of the site and near the west entrance to the site. During Phase One, the west entrance station will be designed to pump all of the effluent from the Project through a force main along the proposed Bypass to the existing gravity sewer near the intersection of New Scotland and Cherry Avenue. The same station will need to be upgraded to convey the Phase Two flows to the 10-inch force main near the intersection of McCormack Road and Cherry Avenue. The force main along the Bypass may need to be designed with a 4-inch and 8-inch pipe to effectively convey the Phase One and Phase Two flows to the ultimate discharge point. Approximately 2,925 lineal feet of offsite force main will be constructed with the NYSDOT right-ofway. The Town is currently conducting and analysis of several existing pump stations impacted by the Project sewage generation. At the conclusion of the study, the impact of the Vista flows and other sources of sewage generation from potential development within the Route 85/New Scotland corridor will be analyzed to determine the appropriate mitigation measures. At the direction of the Town, this information will be addressed in the FEIS portion of the SEQRA Process.

The optimal operational velocities for a sanitary force main are generally between 2 and 5 feet per second (fps). The Phase One flow of 36,262 gpd will need to be conveyed by in a 4-inch force main to maintain minimal velocities. At full build-out, an 8-inch force main will be required to meet the upper range of allowable velocities. Force main capacity calculations are included in Appendix D. The gravity portion of the sewer system will consist of 8-inch diameter, SDR 35, plastic sewer pipe, bell and spigot joints with elastomeric gaskets and appropriate fittings. The onsite force main will

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consist of a combination of 4, 6 and 8-inch force main pipe to meet the design flows of the on-site pump stations. The onsite sewer mains and the pump stations will be located in the public right-ofway and will be owned and operated by the Town of Bethlehem. The results of the preliminary calculations indicate that the proposed sewage system can be constructed to serve the project. The sanitary sewer facilities will be designed in accordance with NYSDEC requirements and the Recommended Standards for Wastewater Facilities ­ 2004. Plans and Engineering Reports will be submitted to NYSDEC, Albany County Health Department and the Town of Bethlehem for review and approval.

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Appendix A Location Map

Information

Appendices

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