WATER SYSTEM ENGINEER’S REPORT

PLUM II Block 28, Lot 1.05

210 Somerset Street City of New Brunswick, Middlesex County, New Jersey

Applicant/Owner:

Somerset Urban Renewal, LLC 111 Magee Avenue

Lavallette, NJ 08735

Prepared By:

Langan Engineering & Environmental Services, Inc. 989 Lenox Drive, Suite 124 Lawrenceville, New Jersey 08648

Dulce S. Miguel, P.E., LEED AP New Jersey Professional Engineer

License No. 24GE05066600

Christian Roche, P.E., LEED AP New Jersey Professional Engineer

License No. 24GE04988100

28 October 2019 Revised 20 December 2019

130139001

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TABLE OF CONTENTS PAGE NO.

INTRODUCTION ............................................................................................................ 1

EXISTING SITE DESCRIPTION ...................................................................................... 1

PROPOSED DEVELOPMENT ......................................................................................... 1

PROJECTED DOMESTIC WATER DEMANDS .............................................................. 1

SURROUNDING WATER INFRASTRUCTURE ............................................................. 2

PROPOSED WATER SERVICE SYSTEM ....................................................................... 2

PROPOSED WATER DESIGN SUPPORTING CALCULATIONS ................................... 2

CONCLUSION ................................................................................................................ 3

LIST OF FIGURES

FIGURE NO. DESCRIPTION

Figure 1 USGS Site Location Map

LIST OF DRAWINGS

DRAWING NO. DESCRIPTION

CS101 Site Plan

CU101 Utility Plan

1

INTRODUCTION

This Engineer’s Report has been prepared on behalf of Somerset Urban Renewal, LLC by Langan

Engineering and Environmental Services, Inc. (Langan) to support the design, permitting, and

construction of the proposed Plum II project, in New Brunswick, New Jersey. The project proposes

the construction of a multi-story medical office building. The project will have an at-grade footprint of

7,700 square feet (SF) and will provide approximately 227,000 gross (sf) of medical office space. The

proposed expansion will be serviced by a proposed 8-inch-diameter ductile iron pipe (DIP) water

pipe.

A summary of the site’s existing conditions, proposed development scope, surrounding water

infrastructure, and the project’s proposed water system are given herein.

EXISTING SITE DESCRIPTION

The property (approximately 0.3±-acre per the City tax map) is located in the City of New

Brunswick, Middlesex County, New Jersey. The project site is bound by Somerset Street to the

north, Prospect Street to the west, Plum Street to the east and the Plum Street Parking Garage to

the south, see Figure 1. The site is currently occupied by a surface parking lot.

PROPOSED DEVELOPMENT

The proposed improvements will consist of a multi-story medical office building and will result in

227,000 gross SF of medical office space.

PROJECTED DOMESTIC WATER DEMANDS

Based on the New Jersey Administrative Code (NJAC) Section 7:10-12.6(b)2, typical medical office

space will generate a domestic water service demand at the rate of 0.125 gallons per day (gpd) per

square foot. We have estimated the proposed domestic water demand of 28,375 gpd based on

the net increase of 227,000 SF of new space.

ESTIMATED AVERAGE WATER DEMAND

Medical Office Space – 227,000 sf x 0.125 gpd/sf = 28,375 gpd

TOTAL ESTIMATED AVERAGE WATER DEMAND 28,375 gpd

2

Based on a peaking factor of 3, the peak daily water demand will be approximately 85,125 gallons

per day (see breakdown below).

ESTIMATED PEAK DAILY WATER DEMAND

Medical Office Space – 227,000 sf x 0.125 gpd/sf x 3 = 85,125 gpd

TOTAL ESTIMATED PEAK DAILY WATER DEMAND 85,125 gpd

Based on a peak daily water demand of 85,125 gpd, the estimated hourly water demand for the

proposed development will generate a peak hour demand of 10,641 gallons per hour (gph).

ESTIMATED PEAK HOURLY WATER DEMAND

Estimated Peak Daily Demand – 85,125 gpd x (1 gph/8 gpd)= 10,641 gph

TOTAL ESTIMATED PEAK HOURLY WATER DEMAND 10,641 gph

SURROUNDING WATER INFRASTRUCTURE

City-owned water mains exist around the project site. The existing water mains below Prospect

Street and Plum Street are both 6-inch-diameter ductile iron pipe. A 12-inch-diameter water main

exist below Somerset Street.

PROPOSED WATER SERVICE SYSTEM

The proposed development will be serviced by an 8-inch-diameter tap to the existing 12-inch main

within Somerset Street, see Drawing CU101.

PROPOSED WATER DESIGN SUPPORTING CALCULATIONS

Based on NJAC 7:10-11.10, water main shall be designed to carry peak demand flow with a

maximum velocity of 5 feet per second (excluding fire service flow). The proposed water pipe have

been sized to comply with this requirement.

3

CONCLUSION

Water demand and the proposed water system has been calculated and designed in accordance

with NJDEP regulations. The City of New Brunswick’s Potable Water Connection Fee Form has

been enclosed with this application. A Simplified Water Main Extension Permit will be filed with

NJDEP.

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NJ Certificate of Authorization No.24GA27996400

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DRAWINGS

(BOUND SEPERATELY)