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4.1.2.7 Utility and Soil Analysis
Nauset Regional High SchoolUtility and Soil Analysis
Utility and Soil Analysis
Utility Analysis - Flow Test
A flow test was performed by Architectural Engineers on November 14, 2019. Water pressure was mea-sured at the hydrant in front of the school along Cable Road with no additional hydrants flowing (zero flow). A measurement of 54 psi was recorded. The next step was to flow the hydrant at the back of the school measuring at 750 gpm while taking the pressure measurement at the hydrant in the front of the school. The pressure dropped to 46 psi. There is adequate water to serve the project without a fire pump. A copy of the flow test is attached here.
Soil Analysis - On-site Septic / Sewage Treatment
Per the attached Coastal Engineering Soils Report, “The preliminary test pit findings and infiltrometer test results indicate that the soils present at the property are suitable for subsurface sewage and stormwater disposal.”
FIRE SAFETY DESIGN GUIDE FP.06
Hydrant Flow Test
Report Date: 11/15/19
Project Number 18069
Summary Results
Project Name: Nauset Regional High School
Project Address: 100 Cable Rd, Eastham, mA
Test Date: 11/14/2019
Test Time: 3:00 PM
Static Pressure: 54.00 psig
Residual Pressure: 46.00 psig
Flow: 751 gpm
Hydrant nozzle outlet size 2.50 inches
Hydrant Coefficient 0.90
# Hydrant Butts flowed One
Test Hydrant Location: 100 Cable Drive
Flow Hydrant Location: Parking Lot of NRHS
Elevation of Static Guage 2 feet
Elevation of Building slab 0.00 feet
Elevations are: estimated
Test Performed by: Jim Shannon
Test Witnessed by: Matt Colton
Test
Hydrant
Flow Hydrant
Procedure: Water pressure was measured at the hydrant in front of the school along Cable Road with no additional hydrants flowing (zero flow). A measurement of 54 psi was recorded. The next step was to flow the hydrant at the back of the school measuring at 750 gpm while taking the pressure measurement at the hydrant in the front of the school. The pressure dropped to 46 psi.
Nauset Regional High School - Hydrant Flow Test
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Nauset Regional High School - Hydrant Flow Test
Results: A flow pressure curve is created to evaluate available pressure related to the estimated sprinkler flow. Based on the curve and the height of the building, it is determined that a fire pump is not required.
December 19, 2019 Project No. C13788.07 Flansburgh Associates, Inc. Attn: Kent Kovacs 77 North Washington Street Boston, MA 02114 VIA EMAIL: [email protected] Re: Nauset Regional High School 100 Cable Road, Eastham, MA Assessor’s: Map 82, Parcel: A-1 Dear Kent:
On November 27, 2019 Coastal Engineering Co., Inc. observed preliminary soil testing at the Nauset Regional High School. Excavation and backfill of the test pits were done by Reynolds Excavating of Orleans, MA using a backhoe. A total of six test pits (deep observation holes) were dug to depths ranging from 11.5 feet to 12.0 feet. Beneath the topsoil and subsoil, the soils consist of clean sands, ranging from loose, fine sand to medium to coarse sand with gravel and cobbles. No groundwater was encountered in any of the test pits.
We conducted two infiltrometer tests to determine the soil infiltration capacity. The first infiltrometer test was performed adjacent to Test Pit #1 and the second infiltrometer test was performed adjacent to Test Pit #5. Infiltrometer Test #1 was conducted at a depth of 48 inches in a soil stratum of medium sand with fine gravel and gravel. The measured infiltration rate of medium sand ranged from 80.00 inches per hour to 142.86 inches per hour. Test #2 was conducted at a depth of 36 inches in a soil stratum of loose fine sand. The measured infiltration rate of fine sand ranged from 27.15 inches per hour to 46.88 inches per hour.
The preliminary test pit findings and infiltrometer test results indicate that the soils present at the property are suitable for subsurface sewage and stormwater disposal.
Copies of the test pit logs, infiltrometer test results, and a sketch plan showing the test pit locations are attached. Please contact me if you have any questions.
Very truly yours,
COASTAL ENGINEERING CO., INC. David J. Michniewicz, P.E. Vice President
DJM/mmw
Attachments
D:\DOC\C13700\13788\13788.07\MSBA SD Submission\2019-12-19 Preliminary Soil Report .doc
Page 1 of 4
Project Title: Nauset Rebgional School Date: 11/27/2019DOH#1 Address: 100 Cable Road Designed By: JGS
Town: Eaastham, Ma. Checked By:Project No.: C13788.07
Design Description: DD Stormwater Drainage Design Depth -48 inches
BEFORE AFTER
6 5 0.43 0.43 1 2.3256 139.535 4 0.85 0.42 1 2.3810 142.864 3 1.37 0.52 1 1.9231 115.383 2 1.90 0.53 1 1.8868 113.216 5 2.52 0.62 1 1.6129 96.775 4 3.72 0.58 1 1.7241 103.454 3 5.56 0.63 1 1.5873 95.243 2 8.03 0.64 1 1.5625 93.755 4 8.78 0.75 1 1.3333 80.004 3 10.20 0.67 1 1.4925 89.553 2 10.86 0.66 1 1.5152 90.91
Depth - 48 inches
INFILTRATION CAPACITY (IN/HR)
TIME(MIN)TIME
INTERVAL (MIN)
1/1
WATER LEVEL (IN)TP/TEST
CUMULATIVE TIME (MIN)
INFILTRATION (IN)
INFILTRATION CAPACITY (IN/MIN)
0.0020.0040.0060.0080.00
100.00120.00140.00160.00
0.00 2.00 4.00 6.00 8.00 10.00 12.00
Infil
trat
ion
Capa
city
(in/
hr)
Cumulative Time (min)
DOH #1
Page 1 of 4
Project Title: Nauset Regional High School Date: 11/27/2019Address: 100 Cable Road Designed By: JGS
Town: Eastham, MA Checked By:DOH #5 Project No.: C13788.08
Design Description: DD Stormwater Drainage Design
BEFORE AFTER
8 7 1.28 1.28 1 0.7813 46.887 6 2.65 1.37 1 0.7299 43.806 5 4.22 1.57 1 0.6369 38.225 4 5.88 1.66 1 0.6024 36.148 7 7.63 1.75 1 0.5714 34.297 6 9.41 1.78 1 0.5618 33.716 5 11.43 2.02 1 0.4950 29.705 4 13.25 1.82 1 0.5495 32.978 7 14.87 1.62 1 0.6173 37.047 6 16.60 1.73 1 0.5780 34.686 5 18.37 1.77 1 0.5650 33.905 4 20.58 2.21 1.00 0.4525 27.15
Depth 36 inches
INFILTRATION CAPACITY (IN/HR)
TIME(MIN)TIME
INTERVAL (MIN)
1/1
WATER LEVEL (IN)TP/TEST
CUMULATIVE TIME (MIN)
INFILTRATION (IN)
INFILTRATION CAPACITY (IN/MIN)
0.00
10.00
20.00
30.00
40.00
50.00
0.00 5.00 10.00 15.00 20.00 25.00
Infil
trat
ion
Capa
city
(in/
hr)
Cumulative Time (min)
DOH #5
