MBP 5394 Boothville Primary School · MBP-5394: NORTHAMPTON SCHOOLS EXPANSION j_m = DRAINAGE ASSESSMENTS ^ Based upon the discharge unit method from BS EN 12056 Part 2 …

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5 December 2012 jáÅÜ~Éä=_~êÅä~ó=m~êíåÉêëÜáé=iim=áë=~=iáãáíÉÇ=iá~Äáäáíó=m~êíåÉêëÜáé=êÉÖáëíÉêÉÇ=áå=båÖä~åÇ=~åÇ=t~äÉë=Ó=oÉÖ=kç=l`=PORNSQ=Ó=oÉÖáëíÉêÉÇ=~ÇÇêÉëë=NMRJNMV=píê~åÇ=içåÇçå=t`Oo=M^^

BOOTHVILLE PRIMARY SCHOOL

NORTHAMPTON PRIMARY SCHOOLS EXPANSION

DECEMBER 2012

MBP-5394: NORTHAMPTON SCHOOLS EXPANSION j_m=

DRAINAGE ASSESSMENTS

^ Based upon the discharge unit method from BS EN 12056 Part 2

* Based upon a 30 year return period.

PREAMBLE

This report has been prepared by Michael Barclay Partnership LLP on the instructions of, and for

the sole use and benefit of, the Client.

Michael Barclay Partnership LLP shall not be responsible for any use of the report or its contents for any purpose other than that for which it was prepared and provided. If the Client wishes to

pass copies of the report to other parties for information, the whole of the report should be copied. No professional liability or warranty is extended to other parties by Michael Barclay Partnership LLP as a result of permitting the report to be copied or by any other cause without

the express written agreement of Michael Barclay Partnership L LP.





BOOTHVILLE PRIMARY SCHOOL (NN3 6JG) FOUL WATER ASSESSMENT

The new building contains 9 WCs, 9 WHBs, 1 cleaner’s sink, & 4 classroom sinks and 1 kitchenette in the staffroom. This will increase the foul flows from the site by approximately 3.5 l/s^.

STORM WATER ASSESSMENT The new building is to be located on the site of an existing brick house. The house is surrounded by grassed areas and as such the impermeable areas will be increased by approximately 375m2. Using the modified rational method, this will increase storm run-off from the site by approximately 4.8 litres per second*. The proposed extension to the car park will be within an area of existing tarmac and will not increase impermeable areas.

FLOODING

The extract below (from EA indicative flood zone maps) shows that the site lies within flood zone 1 and the development site is less than 1 hectare. As such a flood risk assessment is not required.

DRAINAGE STRATEGY

The new building straddles the existing storm water drains. As such the existing pipework will need to be diverted around the footprint of the new building.





Foul flows from the new building will be connected into the existing foul chamber which served the demolished building. However, due to the slope of the existing ground (which slopes away from the proposed foul connection) and the shallow manhole itself (0.6m), it may be necessary to utilise a package pumping station to drain the building (this is dependent on the finished floor level of the new building which will be determined at the detailed design stage).

Storm water from the roof will be collected by drains running around the building. This will discharge into the existing storm drains via a flow controlled attenuation tank. A petrol interceptor shall be provided to improve the quality of the surface water run-off from the extended car park.

Drawing number MBP5394/502a shows the drainage strategy for the new building and extended car park, whilst drawing number MBP5394/502b shows the increased impermeable areas.

This plan is provided by Anglian Water pursuant to its obligations under the Water Industry Act 1991 sections 198 or 199. It must be used in conjunction with any search results attached. The information on this plan is based on data currently recorded but the position must be regarded as approximate. Service pipes, private sewers and drains, and former private sewers and drains transferred to Anglian Water on or after 1 October 2011 are generally not shown. Users of this map are strongly advised to commission their own survey of the area shown on the plan before carrying out any works. The actual position of all apparatus MUST be established by trial holes. No liability whatsoever, including liability for negligence, is accepted by Anglian Water for any error or inaccuracy or omission, including the failure to accurately record, or record at all, the location of any water main, discharge pipe, sewer or drain or disposal main or any item of apparatus. This information is valid for the date printed. The plan is produced by Anglian Water Services Limited from Ordnance Survey © Crown Copyright, 100018507. This map is to be used for the purposes of viewing the location of Anglian Water infrastructure only. Any other use of the map data or further copies are not permitted. This notice is not intended to exclude or restrict liability for death or personal injury resulting from negligence.

Pumping Station

Manhole

Inlet

Outfall

Sewage Treatment Works

Foul Sewer

Final Effluent

Decommissioned Sewer

(Colour denotes effluent type)


Surface Sewer

Combined Sewer(Colour denotes effluent type)



Date: 02/10/12 Scale: 1:1250 Data updated: 01/08/12Map Centre: 478363.4,263976.9Ordnance Survey Mapping © Crown Copyright 1000018507 Wastewater Plan A2Our Ref: 40815 - 8

[email protected]

Boothville

Rising Main

Private Sewer(Colour denotes effluent type)

Manhole Reference Liquid Type Cover Level Invert Level Depth to Invert

0702 F 111.8 110.05 1.75

0802 F 116.018 113.25 2.768

0803 F 116.21 112.906 3.304

0804 F 117.591 114.857 2.734

0805 F 117.841 115.881 1.96

0806 F 118.648 117.838 0.81

0900 F 118.648 117.024 1.624

1001 F 120.639 117.566 3.073

1002 F 119.842 117.076 2.766

1101 F 119.285 116.518 2.767

1704 F 113.766 110.617 3.149

1705 F 115.021 113.382 1.639

1706 F 114.177 111.434 2.743

1801 F -99 -99 -99

1802 F 116.92 114.698 2.222

1901 F -99 -99 -99

2101 F 115.454 113.522 1.932

2102 F 115.57 113.436 2.134

2103 F 115.756 114.003 1.753

2704 F 114.902 112.159 2.743

2705 F 114.915 112.766 2.149

2801 F 115.155 113.343 1.812

2802 F 115.634 113.805 1.829

2803 F 116.161 114.268 1.893

3001 F 116.929 113.741 3.188

3003 F 116.308 114.556 1.752

3004 F 116.039 113.266 2.773

3101 F 110.126 108.779 1.347

3705 F 113.802 112.191 1.611

3801 F 115.131 112.856 2.275

3802 F 115.738 113.375 2.363

4001 F 117.88 115.543 2.337

5001 F 114.455 112.175 2.28

5101 F 113.808 111.851 1.957

5102 F 111.349 110.123 1.226

5103 F 112.281 108.026 4.255

6101 F -99 -99 -99

6102 F 108.106 105.99 2.116

7704 F 97.267 95.027 2.24

0050 S 120.907 119.383 1.524

0051 S 120.681 119.639 1.042

0150 S 121.172 119.877 1.295

0151 S 121.66 120.34 1.32

0751 S 111.8 110.05 1.75

0753 S 114.037 111.967 2.07

0754 S 115.03 112.909 2.121

0755 S 115.939 113.671 2.268

0851 S 117.612 115.226 2.386

0852 S 118.035 115.368 2.667

0853 S 117.63 116.006 1.624

0854 S 118.551 115.911 2.64

0855 S 116.725 114.643 2.082

0951 S 118.834 116.74 2.094

0952 S 118.362 117.624 0.738

0953 S 118.478 116.74 1.738

1050 S 120.73 119.283 1.447

1051 S 119.343 118.481 0.862

1755 S 115.253 113.348 1.905

1756 S 114.165 -99 -99

1757 S 113.912 111.76 2.152

1758 S 115.037 112.726 2.311

1851 S 115.283 113.558 1.725

1852 S 115.995 114.893 1.102

1853 S 116.887 115.058 1.829

1854 S 117.548 115.491 2.057

1855 S 117.024 115.372 1.652

1856 S 116.058 114.838 1.22

1951 S -99 -99 -99

1952 S -99 -99 -99

1953 S 117.707 116.03 1.677

2050 S 117.682 115.32 2.362

2051 S 117.963 116.884 1.079

2052 S 116.396 114.012 2.384



2150 S 115.45 113.51 1.94

2151 S 115.049 112.964 2.085

2153 S 116.067 115.253 0.814

2754 S 113.528 111.534 1.994

2755 S 115.009 113.072 1.937

2852 S 116.149 114.659 1.49

2853 S 116.39 115.034 1.356

2854 S 115.731 113.79 1.941

2855 S 115.698 114.086 1.612

2951 S 117.405 116.289 1.116

2952 S 118.209 117.194 1.015

2954 S 117.438 116.5 0.938

3050 S 116.817 114.329 2.488

3051 S 115.71 114.743 0.967

3756 S 115.343 113.793 1.55

3851 S 115.756 114.36 1.396

3852 S 115.579 113.802 1.777

4150 S 111.251 110.184 1.067

4754 S 113.93 -99 -99

4755 S 114.68 113.177 1.503

4756 S 114.601 113.891 0.71

4851 S -99 115.305 -99

4853 S 116.195 115.28 0.915

4854 S 115.616 114.268 1.348

4855 S 114.982 113.61 1.372

4951 S 116.975 116.289 0.686

4952 S 116.704 115.966 0.738

4953 S 116.24 114.945 1.295

4954 S -99 116.347 -99

5050 S 115.945 114.692 1.253

5051 S 115.506 113.677 1.829

5052 S 115.192 113.058 2.134

5150 S 113.47 112.428 1.042

5751 S 98.494 96.974 1.52

5850 S 114.022 111.864 2.158

5851 S 114.406 113.034 1.372

5950 S 115.366 113.793 1.573

6050 S 110.983 107.935 3.048

6150 S 107.005 105.938 1.067

6850 S 113.327 111.675 1.652

6851 S 111.705 109.776 1.929

6852 S 98.271 96.271 2

6950 S 115.402 112.354 3.048

6951 S 111.8 110.199 1.601

7757 S 97.294 92.224 5.07

7851 S 97.007 92.39 4.617


1.3

denv

er™

pole

denver™ poleap

plic

atio

ns Landscaped areas

Car parks

Amenity areas

Retail parks

Entrance roads

Pedestrian areas

The Denver™ Pole Mount luminaire with its attractive

contemporary styling and exceptional performance

characteristics is unsurpassed in meeting modern

lighting design criteria for striking landscape illumination

at night, coupled with aesthetic appeal by day. The latest

control gear and lamp technology, coupled with a

precisely engineered anodised reflector, achieve

maximum performance and high efficiency. Compliance

with Night Time Friendy requirements is easily achieved

due to precise light control.

1.4

denv

er™

pole

amenity

features and benefits

Contemporary styling

> Unique aesthetic appeal to

complement today’s architecture

High quality construction

> Durability

> Fully Weather Sealed

Controlled upward light

> ‘Night Time Friendly’

Two light distributions

> Maximum efficiency and uniformity

for any application

Extensive choice of bracket permutations

> Unique appearance for every

application

> Flexibility of design

Tool-free access to lamp & gear tray

> Easy maintenance

< grange park school - northampton

lamp types included

35W - 150W metal halide (various)

70W - 150W high pressure sodium

32W - 42W compact fluorescent (twin lamp)

IP rating

IP657

approvals

Complies with EN60598

1.5

denv

er™

pole

short arm- 150mmlong arm - 400mm

0˚ version

5˚ version

600

10 Ø

250

200

200

190

330

short arm- 150mmlong arm - 400mm

515

60mm ø side entry bracket shown

DPS.WB - wall bracket

Photometric data is availableat www.holophane.co.uk

specification

The luminaire shall consist of a polycarbonatelens housed in an ABS alloy door arrangementwith a high pressure die-cast aluminium body,housing integral control gear to suit a wide rangeof high intensity discharge or compactfluorescent lamps. An acrylic lens shall beavailable as an option. The optical arrangementshall consist of an anodised aluminium reflectorand injection moulded polycarbonate or acryliclens. The door shall be secured to the body bytwo concealed latches providing tool free accessfor maintenance. The two sections shall besealed by a closed cell silicone gasket ensuringIP65 is maintained. The luminaire complies withEN60598 and has a range of complementarybrackets and column permutations available.

windage

Code

Denver™ Pole 0.1m2

Asymmetric (.AY)

Street (.NR)

weights & thermal data

Lamp Type Weight (kg) Min. Operating Max. AmbientTemperature (˚C) Temperature (˚C)*

70W High Pressure Sodium 7.1 -30 60100W High Pressure Sodium 7.8 -30 50150W High Pressure Sodium 8.5 -30 5035W CDMTF3 Metal Halide 7.1 -20 5570W CDMT3 Metal Halide 7.1 -20 75100W CDMT3 Metal Halide 7.8 -20 60150W CDMT3 Metal Halide 8.5 -20 5032W (Twin) Compact Fluorescent 5.6 -10 5042W (Twin) Compact Fluorescent 5.6 -10 50

* The maximum ambient temperatures stated are for exterior use only. For interior use deduct 10˚Cfrom the temperature stated. Note: For photocell options please deduct 15˚C for 100 & 150W types.

light distributions

denv

er™

pole

1.6

amenity

Asymmetric

Street

optical versatility

Two choices of optical arrangementsare available for the DenverTM Pole Mountluminaire, asymmetric & street.

Controlled directional light, minimising:

> Light pollution

> Light spill

> Discomfort glare

Precision engineered anodised semi-specularaluminium reflectors ensure either maximumlateral and forward distribution (streetdistribution), ideal for entrance roads, or anasymmetric distribution for car parks,pedestrian areas and retail parks. Both lightdistributions provide excellent uniformity.

easy maintenance

Internal component layout allows easy accessto all critical components. The control gear issecured to a removable geartray which can beeasily lifted out for maintenance purposes.

Tool-free latches allow quick andeasy access for maintenance.

Mains termination block

Reflector & lampholderarrangement

Control gear

Removable geartray

Door retaining strap

1.7

denv

er™

pole

denv

er™

pole

1.8

amenity

ordering details : luminaire

DPS.BLS

luminaire accessories order separately for on-site installation by othersCode

DPS.BLS Back-light Shield (for asymmetric only)

DPS.42 42mm Adaptor (reduces 60mm entry to 42mm)

Example

< milton keynes hospital subway - netherfield

CodeDPS Denver Pole

Code Lamp Type .70XT 70W Clear High Output HPS Lamp (E27) Base.100XT 100W Clear High Output HPS Lamp (E40) Base.150XT 150W Clear High Output HPS Lamp (E40) Base.35CDMTF3 35W Clear CDMT 3000K Metal Halide Lamp (G12) Base*.70CDMT3 70W Clear CDMT 3000K Metal Halide Lamp (E27) Base*.100CDMT3 100W Clear CDMT 3000K Metal Halide Lamp (E27) Base*.150CDMT3 150W Clear CDMT 3000K Metal Halide Lamp (E40) Base*.232PL4 32W Twin 4000K Electronic Compact Fluorescent 4-Pin Lamp**.242PL4 42W Twin 4000K Electronic Compact Fluorescent 4-Pin Lamp**

Code Light Distribution

.AY Asymmetric

.NR StreetCode Colour

.C1 White (RAL 9016)

.C4 Graphite (RAL 7011)

.C6 Grey (RAL 7035)

.C7 Black (RAL 9005)

.C9 Metallic Silver (RAL 9006)

.RAL**** RAL colour (customer choice)***Code Options

.A Acrylic Lens****

.C Enhanced Paint Finish

.T PhotocellDPS .150XT .AY .C9 .C

* All ceramic lamp circuits contain timed ignitors. **.NR distribution only. ***Please specify RAL colour reference. ****For 100W maximum.Note: Luminaires are supplied as standard for use on 240V 50Hz supply and complete with lamp.For 230V 50Hz add prefix ‘N’. Other voltages available onrequest.

0 Degree Wall Bracket

DPS.WB.C1 White

DPS.WB.C4 Graphite

DPS.WB.C6 Grey

DPS.WB.C7 Black

DPS.WB.C9 Metallic Silver

DPS.WB.RAL**** RAL Colour (customer choice)

5º all brackets are available. Configuration e.g DPS.5WB.C7

contactHolophanefor details

1.9

denv

er™

pole

column accessories

Example

Code Tubular Compartment Columns (DPSB)HELB.FS1 J-Anchor bolts for flange base, 3m to 5mHELB.FS2 J-Anchor bolts for flange base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*

Code Conical Steel Columns (DPSC)HELC.FS1 J-Anchor bolts for flange base, 3m to 5mHELC.FS2 J-Anchor bolts for flange base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*

*please contact Holophane for details

Code Mid Hinged Columns (DSPMH)HELMH.FS1 J-Anchor bolts for flange base, 4m to 5mHELMH.FS2 J-Anchor bolts for flange base, 6m to 8m.RLR4 Raise lower rope 4m-5m .RLR6 Raise lower rope 6m.RLR8 Raise lower rope 8m

Conical Aluminium Columns (DSPAC)HELAC.FS1 J-Anchor bolts for Flange Base, 3m to 5mHELAC.FS2 J-Anchor bolts for Flange Base, 6m to 8mHEL.CBEPAC Cut Out Box and Earth Plate for Armoured Cable*

rockingham park - corby >

ordering details : columns & brackets

CodeDPSB Denver Tubular Base Compartment ColumnDPSC Denver Steel Conical ColumnDSPAC Denver Aluminium Conical ColumnDSPMH Denver Steel Mid Hinged Column

Code Luminaire Mounting Height.3 3 metres*.4 4 metres.5 5 metres.6 6 metres.8 8 metres

Code Column Category please refer to page 24.15 for definition of the EN40 guidelines.LMZ For light & medium area wind zones (EN40 rationalised wind zones).HVZ For heavy area wind zones (EN40 rationalised wind zones).HEZ For extra heavy wind zones (EN40 rationalised wind zones)

Code Brackets.1L Single head long bracket.1S Single head short bracket.2L Twin head long bracket.2S Twin head short bracket

Code Bracket Style.A0 Angle at 0°.A5 Angle at 5°

Code Colour.C1 White (RAL 9016).C4 Graphite (RAL 7011).C6 Grey (RAL 7035).C7 Black (RAL 9005).C9 Silver (RAL 9006).RAL**** RAL Colour (customer choice)**

Code Optional Base Type please refer to page 24.1 for details, base is dependant on height and type of column

.FB1 Flange Base

.FB2 Flange BaseCode Optional Column Finish.P1 Black undercoat primed.P2 Undercoat primed

to match RAL colour specified Code Optional paint Finish

(Bracket Only).C Enhanced paint finish

DPSB .3 .LMZ .1S .A0 .C1 .FB1 .P1 .C

*not available with DPSMH. **Please specify RAL colour reference.

for decorativecolumns see

page 24.1

denv

er™

pole

1.10

9.1

gate

way

®

gateway®

appl

icat

ions The Gateway® architectural bulkhead series offers a

variety of styles designed to accent architectural

settings and meet the needs of extreme environments

with its die-cast aluminium and injection-moulded

polycarbonate enclosures. Available in round and oval

shapes for wall or ceiling mounting, Gateway® provides

four distinct designs for a wide array of attractive looks

to enhance the space. The versatile Gateway® series

accepts a wide selection of compact fluorescent and

high intensity discharge lamps to provide superior

performance and uniform illumination, improving

visibility for commercial and institutional public use

facilities.

Public buildings

Entrances

Lobbies

Corridors

Canopies

Multi-storey

Car parks

gate

way

®

9.2

gateway round

opal lens

eyelid design

features and benefits

Contemporary styling in different shapes

> Aesthetic appeal to complement

today’s architecture

High quality construction

> Durable and vandal-resistant

Total lamp obscurity

> Even, glare-free illumination

Polycarbonate lens

> Flexibility of use

Choice of lamp types

> Versatility

Totally enclosed luminaire

> Suitable for wide range of

applications

lamp types included

35W - 70W metal halide

18W - 42W compact fluorescent (various)

IP rating

IP659

approvals

Complies with EN60598

gateway oval

5 kg

interior

9.3

gate

way

®

gateway round slim line gateway round slim line eyelid

gateway oval slim line eyelid gateway oval slim line

light distributions

150mm

weights & thermal data

Unit Lamp Type Weight (kg) Min Operating Max Ambient*Temperature (˚C) Temperature (˚C)

GRC 35W CDMT 5.6 -20 25

GRC 70W CDMT 5.9 -20 25

GRC 26W TRT 5.3 / 4.5* -5 25

GRC 32W TRT 4.5 -10 25

GRC 42W TRT 4.5 -10 25

GRC 2 x 42W TRT 4.8 -5 25

GRS 2 x 26W PL 3.1 -5 25

GRS 32W TRT 2.9 -10 25

GRS 26W TRT 2.9 -5 25

GOC 42W TRT 3.7 -10 25

GOC 18W TRT 4.5 / 3.7* -5 25

GOC 35W CDMT 5.6 -20 25

GOS 32W TRT 2.4 -10 25

GOS 26W TRT 2.4 -5 25

GOS 18W TRT 2.4 -10 25

* Non emergency onlyEmergency below:26W TRT Round Emergency +25˚C26W TRT Emergency +25˚C18W TRT Oval Emergency +25˚C

specification

The (round / oval) bulkhead luminaire shallconsist of a powder coated pressed steel backplate (GRS / GOS) or a die cast aluminiumhousing (GRC / GOC) and a cast aluminiumbezel. The housing encloses a reflector andintegral control gear to suit a choice of 18W,26W, 32W, 42W TRT compact fluorescent lampsor 35W, 70W ceramic metal halide high intensitydischarge lamps, depending on whether this beGRS/GOS or GRC/GOC. The lens shall be a UVstabilised opal diffuser secured in place by a diecast aluminium bezel ensuring environmentalprotection to IP659 (20 joules impactresistance). The luminaire shall be suitable forsurface mounting and complies with EN60598with a choice of options and accessories.

Ø 356

.RF1

.RF1

.RF2

.RF3

175

356

104

229

.OF1

.OF2

.OF3

104

173

GRS

GRC

GOC

GOS

Photometric data is availableat www.holophane.co.uk

gate

way

®

9.4

.RF1

.RF2

.RF3

.OF1

.OF2

.OF3

round style oval style

interior

9.5

gate

way

®

ordering details : luminaire

CodeGRS Round Gateway slim-line bulkheadGRC Round Gateway cast bulkhead

Code Lamp Type .35CDMTF3 35W Clear CDM-T 3000K ceramic metal halide lamp (G12) base*.70CDMT3 70W Clear CDM-T 3000K ceramic metal halide lamp (E27) base*.26TRT 26W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base.32TRT 32W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base.42TRT 42W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-4) base*.242TRT 2 x 42W Triple tube 4000K compact fluorescent 4 Pin lamp (Gx24q-4) base*.226PL4 2 x 26W 4000K Compact fluorescent 4 pin lamp (G24d-2) base**

Code Style.RF1 Round front design with opal polycarbonate lens.RF2 Round front with horizontal eye lid design with opal polycarbonate lens.RF3 Round front with cross design with opal polycarbonate lens

Code Colour.C1 White (RAL 9016).C4 Graphite (RAL 7011).C6 Grey (RAL 7035).C7 Black (RAL 9005).C9 Metallic Silver (RAL 9006).RAL**** RAL Colour (Customer Choice)***

Code Options †.ME Self contained 3 hour maintained emergency battery & invertor.T Factory fitted miniature photocell.TW Through wiring.V Tamper resistant screws†.SHR Decorative shroud††

Code Optional Paint Finish .C Enhanced paint finish*

GRC .70CDMT3 .RF1 .C9 .T .C

*Not available with GRS option. **available with GRC, GRS option. ***Please specify RAL colour reference. †.V option available for to GRC & GRS all otheroption only available to GRC. ††Only available for GRC. Note: Luminaires are supplied as standard for use on 240V 50Hz supply and complete with lamp.For 230V 50Hz add prefix ‘N’. Other supply variations available on request.

Example

gate

way

®

9.6

luminaire accessorires

CodeGOC.VK Vandal key suitable for all Gateway versions

CodeGOS Oval Gateway slim-line bulkheadGOC Oval Gateway cast bulkhead

Code Lamp Type .35CDMTF3 35W Clear CDM-T 3000K ceramic metal halide lamp (G12) Base*.18TRT 18W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-2) base.26TRT 26W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base.32TRT 32W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-3) base*.42TRT 42W Triple tube 4000K compact fluorescent 4 pin lamp (Gx24q-4) base

Code Style.OF1 Oval front design with opal polycarbonate lens.OF2 Oval front with horizontal eye lid design with opal polycarbonate lens.OF3 Oval front with cross design with opal polycarbonate lens

Code Colour.C1 White (RAL 9016).C4 Graphite (RAL 7011).C6 Grey (RAL 7035).C7 Black (RAL 9005).C9 Metallic Silver (RAL 9006).RAL**** RAL Colour (Customer Choice)**

Code Options.ME Self contained 3 hour maintained emergency battery & invertor.T Factory fitted miniature photocell.TW Through wiring.V Tamper resistant screws

Code Optional Paint Finish .C Enhanced paint finish

GOS .18TRT .OF2 .C9 .V .C

*Only available with GOC range. **Please specify RAL colour reference.

Example

interior

The Wool Hall T: 0117 910 5200 12 St Thomas Street F: 0117 926 0221 Bristol [email protected] BS1 6JJ www.ionacoustics.co.uk

Ion Acoustics Ltd. Consultants in Acoustics Registered in England and Wales No. 5920418

BOOTHVILLE PRIMARY SCHOOL

ENVIRONMENTAL NOISE SURVEY

Acoustics Report A532/R06

18th October 2012

Report for: Northampton Schools Ltd

Report issued to:

Architecture Initiative 3rd Floor West 385 Barrett Street W1U 1AY Attention: Rowan Parnell

Prepared by: Checked by: Chris Borak BSc MIOA David O'Neill BEng MSc CEng MIOA

Issue/Revision number Date A532/R06 18/10/2012

Boothville Primary School – Environmental Noise Survey

A532/R06 18th October 2012

Contents

1 Introduction ........................................................................................................................... 1

2 Site Proposal .......................................................................................................................... 1

3 Site and Surroundings ............................................................................................................. 2

4 The Building Regulations and Building Bulletin 93 (BB93) .......................................................... 3

5 Noise Limits ............................................................................................................................ 4

5.1 External Noise Limits ....................................................................................................... 4

5.2 Internal Noise Limits ....................................................................................................... 4

6 Noise Survey .......................................................................................................................... 6

6.1 Procedure ...................................................................................................................... 6

6.2 Measurements ................................................................................................................ 7

6.3 Weather Conditions ........................................................................................................ 7

6.4 Results – External Noise Levels ........................................................................................ 7

7 Implications for Ventilation ...................................................................................................... 8

7.1 BB93 External Noise Sources ........................................................................................... 8

7.2 Nursery Noise ................................................................................................................. 9

8 External Plant Noise Limits ..................................................................................................... 10

9 Summary .............................................................................................................................. 11


A532/R06 18th October 2012 Page 1

1 Introduction

Ion Acoustics is appointed by Architecture Initiative on behalf of Northampton Schools Ltd to

provide acoustic advice on external noise in respect of potential expansion of a number of

primary schools in Northampton. This report relates to an external noise assessment for a

proposed new teaching block for Boothville Primary School in Northampton.

Requirement E4 of the Building Regulations applies to the acoustics of new school buildings and

applies to this project. Detailed advice on meeting the Building Regulations Requirement E4 is

provided in Building Bulletin 93 (BB93). This report relates only to environmental noise

affecting the proposed new teaching block.

Ion Acoustics has carried out a noise survey at the site to determine baseline environmental

noise levels. The results have been used to assess the implications for the ventilation strategy,

building envelope sound insulation and compliance with the noise level performance standards

in BB93. The results have also been used to determine suitable external plant noise limits for

the proposed development. This report documents the survey findings.

2 Site Proposal

The proposal is to construct a new single story teaching block to the south east of the existing

main Boothville Primary School building. The new teaching block will likely comprise four

classrooms and associated ancillary circulation and accommodation space. The current

preferred location for the new block is shown in pink in Figure 1; possible alternative locations

are shown in blue. This report comments in principle on all locations in respect of external

noise but the survey covered only the preferred location.



Figure 1 – Proposed School layout and Survey Locations

3 Site and Surroundings

Boothville Primary School is in a predominantly residential area. The A5123 is the nearest

major trunk road, 285m to the north west of the preferred site. However, Booth Lane North is

25m to the east and also carries fairly significant and mostly continuous traffic. Other local

roads are less busy.

Most of the preferred site is screened from Booth Lane North by the existing nursery block.

While this reduces traffic noise levels its location does mean the new building will be exposed to

noise from the nursery play area. The nursery is a part of Boothville Primary School and

therefore, noise from it would be excluded from applicable noise limits in respect of BB93.

Attended Monitoring Location

3

Unattended Monitoring Location Monitoring Location

Nursery Playground

Boothville Primary School

A532/R06

Figure 2

4 The Building Regulations

Requirement E4 from Part E of Schedule 1 to The Building Regulations 2000

“Each room or other space in a school building shall be designed and constructed in such a way

that it has the acoustic conditions and the insulation against disturbance

its intended use.

Approved Document E provides further information on complying with the Building Regulations

and includes the following statement:

“In the

the values for sound insulation, reverberation time and internal ambient noise which are given

in Section 1 of Building Bulletin 93 ‘The Acoustic Design of Schools’, produced by DfES.”

The performance standards indicated within Section 1 of

for the acoustic design of new schools.

“The overall objective of the performance standards in Section 1.1 is to provide acoustic

conditions in schools that (a) facilitate clear comm

student, and between students, and (b) do not interfere with study activities.

The BB93 standards and regulations are directly applicable to the following rooms and spaces:

Boothville Primary School

A532/R06

Figure 2 – Arial Photograph:

The Building Regulations


Each room or other space in a school building shall be designed and constructed in such a way


its intended use.



In the Secretary of State’s view the normal way of satisfying Requirement E4 wi





The overall objective of the performance standards in Section 1.1 is to provide acoustic




• All teaching and learning spaces.


Arial Photograph: Showing noise sources

The Building Regulations




its intended use.”



Secretary of State’s view the normal way of satisfying Requirement E4 wi









All teaching and learning spaces.

Environmental Noise Survey

18th

Showing noise sources

The Building Regulations and B

















18th October 2012

Showing noise sources

Building Bulletin









for the acoustic design of new schools. Section 1.1







October 2012

ulletin 93 (BB








The performance standards indicated within Section 1 of BB93

Section 1.1 of BB93 states that:


conditions in schools that (a) facilitate clear communication of speech between teacher and



(BB93)



that it has the acoustic conditions and the insulation against disturbance by noise appropriate to





BB93 should, therefore

states that:


unication of speech between teacher and



Requirement E4 from Part E of Schedule 1 to The Building Regulations 2000 states:


by noise appropriate to


Secretary of State’s view the normal way of satisfying Requirement E4 will be to meet



therefore, form the basis



student, and between students, and (b) do not interfere with study activities.”


Page 3


by noise appropriate to


ll be to meet



form the basis






• Administration and ancillary spaces in as much as they affect adjacent learning spaces.

• Adult/Community education spaces (if any).

• Nurseries which are part of a school.

It is useful to note that meeting the numerical standards in BB93 is the normal method of

complying with Requirement E4. However, if alternative standards can be demonstrated to be

appropriate, then it can be acceptable not to comply with the numerical performance standards.

This is subject to agreement with the school and the building control body. Section 1.2.1 of

BB93 describes this process.

5 Noise Limits

5.1 External Noise Limits

BB93 gives fairly conservative advice on noise levels in respect of sites for new schools. Section

2.3 states: “If the noise measurement survey shows that the ambient external noise levels on

the site are below 45 dB LAeq, 30min…, no special measures are likely to be necessary to protect

the building or playing fields from external noise”. However, sites below 45 dB LAeq are rare in

urban areas.

In terms of playgrounds and playing fields, BB93 states “Noise levels in unoccupied

playgrounds, playing fields and other outdoor area should not exceed 55 dB LAeq,30min and there

should be at least one area suitable for outdoor teaching activities where noise levels are below

50 dB LAeq,30min.”

Note that, the recommendations on noise levels in outdoor areas in BB93 do not form part of

the Building Regulations and are, therefore, stated as nonCmandatory guidance only. The

LAeq,30min index is defined as the equivalent steadyCstate noise level with the same energy as the

actual fluctuating noise over the time period (in this case 30 minutes).

5.2 Internal Noise Limits

In schools which are naturally ventilated, the internal noise climate is determined by noise

transmission from the exterior. For mixed mode or fully mechanically ventilated schools, the

noise climate is a combination of the noise from mechanical services and from the exterior. A

sound level difference of 10 dB is often assumed for a façade with open windows and,

assuming an internal noise limit of 35 dB LAeq, as recommended for classrooms in Table 1.1 of

BB93, this translates as a maximum external noise level of 45 dB LAeq as stated in Section 2.3

BB93 (quoted above).

External noise levels at most urban school sites exceed 45 dB LAeq, and hence the application of

the internal noise limits was revised in the Building Bulletin 101 “Ventilation in School Buildings”

(BB101). BB101 states that where natural ventilation is provided, the BB93 noise limits must be

maintained for ventilation rates of 3 l/s/person, but noise levels 5dB(A) higher are permitted at

a ventilation rate of 8 l/s/person (i.e. with windows more fully opened). Therefore, naturally

ventilated teaching rooms now effectively have two noise limits according to the ventilation

rate. These are set out in Table 1 below for various rooms.



The ambient noise limits given in BB93 represent the combined noise levels from the following

sources:

• External noise, e.g. traffic, railways, aircraft, industrial noise

• Mechanical services, e.g. Ventilation systems and Plant.

Noise sources excluded from the targets are:

• Teaching activities within the school premises including in playgrounds

• Equipment noise, e.g. from machine tools, computers, fume cupboards

• Rain noise – however, BB93 states that rain noise should be controlled so that it does

not impinge upon the performance of the school. Numerical targets are not specified.

Table 1 – Internal Noise Targets derived from BB93 and BB101

Room Internal Noise Limit,

LAeq,30mins dB at ventilation

rate of 3l/s/person and for

mechanical ventilation#.

Internal Noise Limit,

LAeq,30mins dB at ventilation

rate of 8l/s/person

(natural vent only)

Primary classrooms, Class bases,

General teaching areas, small

group rooms

35 dB 40 dB

Nursery school playrooms and

quiet rooms 35 dB 40 dB

Music Classroom 35 dB 40 dB

Assembly Hall 35 dB 40 dB

Library (Resource Area) 40 dB 45 dB

Classrooms* designed specifically

for use by hearingCimpaired

students (including speech

therapy rooms)

30 dB* 30 dB*

* C Note that no relaxation is permitted for these rooms

# C Note that with mechanical ventilation the room must meet the lower BB93 target at the design

ventilation rate.

Hence, the general internal noise limit under natural ventilation conditions is LAeq 35 or 40 dB

depending on the ventilation rate for most teaching spaces. Note that, BB93 requires a lower

limit of 30 dB LAeq for rooms “specifically designed” for hearingCimpaired pupils or for speech

therapy and that no relaxation is permitted under BB101. We are not aware of any

requirement for such rooms in the proposed new teaching block, but if there were, this must be

brought to the attention of the designers and the specific room would be subject to the more

onerous acoustic design criteria.

A window only slightly open and providing only background ventilation provides better sound

insulation than one which is fully open. Therefore, taking 10 dB(A) at standard attenuation for

an open window, sites which have external noise levels no greater than LAeq 50 dB are

demonstrably suitable for naturally ventilated teaching accommodation.



BB101 encourages the use of natural ventilation in schools. Where there are difficulties in

meeting these limits BB101 suggests that “alternative performances standards” as permitted

under Section 1.2.1 of BB93 may be appropriate, if agreed with the school and acoustic

specialist. BB101 states in section 1.6.1:

It is recognised that the acoustic needs of classrooms are stringent and may prevent the use

of natural ventilation in some circumstances, even given the suggested addition of 5 dB to the

requirements when providing external air at a rate of 8 l/s per person. Consequently, the

designer is advised to refer to section 1.2.1 of Building Bulletin 93

The aim of quoting this statement of ‘alternative performance standards’ for the acoustic

requirements in this Building Bulletin on ventilation, is to allow some flexibility so that the

ventilation requirements of schools can be met by natural means, wherever it is possible to

maintain a level of acoustic performance that is deemed appropriate by the users of the

school. It is intended that this will lessen the likelihood of an unwanted mechanical

ventilation system being installed, incurring unnecessary capital and running costs.”

It is, therefore, recognised that the benefits of providing natural ventilation may, for some sites

where noise levels are slightly above LAeq 50 dB, outweigh the slightly increased internal noise

levels. However, this would need to be accepted and approved as an “Alternative Performance

Standard” following the procedures of BB93. Effectively the school must agree to accept the

slight reduction in acoustic conditions.

6 Noise Survey

6.1 Procedure

The noise survey was carried out at the existing school site on 10th October 2012. All

measurements were external. The measurement locations are shown in Figure 1.

Measurement microphones were mounted on tripods at around 1.5m above local ground level

and at least 3m from vertically reflective surfaces such as building façades or walls.

To properly assess the site background noise level in accordance with BB93 and BS4142 it is

necessary to exclude activity noise from the existing school and any other nonCtypical noise.

The survey took place on a normal school day; therefore, the attended sound level meter was

paused during periods of school outdoor activity. However, activity noise from the nursery play

area was almost continuous throughout the day and severely disrupted measurements.

An attempt was made to make some measurements after the nursery had closed.

Unfortunately, noise from the afterschool gardening club had an impact on these later

measurements and at 16:47 the school fire alarm was tested. As the primary nonCschool

activity noise source is road traffic noise, measurements were stopped before the start of the

rush hour at 17:00. The continuous school activity noise during and after normal teaching

hours led to very few successful measurements and none that were totally free of school

activity noise.



6.2 Measurements

Measurements at the attended monitoring location were made in octave frequency bands using

a SVANTEK 947 sound level meter. Measurements were generally in 10 minute intervals;

however, some were cut short by interruption. The attended monitoring location was

completely screened from Booth Lane North by the existing nursery block; noise levels

measured here represent the majority of the proposed new teaching block, i.e. all facades

except the southern façade.

A SVANTEK 955 logging sound level meter was setup at the unattended location. This was only

partially screened by the nursery block and is representative of noise levels incident on the

southern façade of the proposed new teaching block. Unfortunately, an equipment failure led

to no data being recovered from this meter. However, the unattended SVANTEK 955 was

attended for some periods and traffic noise levels at this location were noted by observation of

levels on the screen.

Both meters were calibrated using a Brüel & Kjær 4231 calibrator before and after the

measurement period. No drift in the calibration level was noted.

6.3 Weather Conditions

The weather conditions for the survey were recorded using a hand held anemometer and

thermometer and were as follows:

Average temperatures: 12°C

Wind Speed at microphone: 2.5 m/s

Wind direction: Easterly

There was no precipitation and weather conditions were conducive to successful noise

monitoring.

6.4 Results – External Noise Levels

The measured noise levels for the attended monitoring location are given in Table 2, below.

Table 2 – Attended Noise Survey Results

Start Time Duration (seconds)

LAeq, dB

LA01, dB

LA90, dB

10/10/2012 11:40 00:08:04 53.0 65.5 43.5 excess school activity noise

10/10/2012 11:59 00:10:00 49.4 57.6 44.1

10/10/2012 12:11 00:09:45 54.3 64.8 46.0 excess school activity noise

10/10/2012 16:00 00:10:00 51.0 60.3 46.4

10/10/2012 16:13 00:09:44 50.5 58.3 46.2

10/10/2012 16:34 00:10:00 51.7 61.4 46.1 fire alarm (paused too late)

10/10/2012 16:46 00:10:00 50.5 57.3 46.5

Summary: (Average/Minimum)1 50.4 60.3 43.5

Note 1: The summary values are given as the energy average for LAeq, the arithmetic average for LA01 and the lowest measured value for LA90.



The measurements reported in Table 2 are those which were the least affected by school

activity noise during more than 3 hours of attended measurement; however, they were still

affected to some extent by minor distant school activity. Measurements in red have been

excluded from the average for the reason stated. From these measurements the average LAeq

noise level was 50.4 dB. In the absence of all school activity noise this would have been

slightly lower. The ambient noise climate at this location was dominated by continuous but

discrete vehicle movements on Booth Lane North.

Although the meter at the unattended location failed to log, traffic noise levels at this location

were recorded in the survey notes. Road traffic noise levels were consistently 2 dB to 3 dB

higher than those at the attended position because of less screening provided by the existing

nursery building at this location. Therefore, it is expected that the road traffic noise levels

would have been around LAeq 52C53 dB at the most exposed location of the proposed building.

As the dominant offCsite noise source is Booth Lane Road to the east, noise levels at the

alternative location to the west of the existing main school building are likely to be lower than

measured at the preferred site. The alternative site which is closer to booth lane road would be

exposed to noise levels significantly in excess of the previously stated limit for natural

ventilation via openable windows of 50dB LAeq and if this location is chosen noise should be

considered when planning the layout and ventilation strategy.

The noise of activity on the school site is excluded from the BB93 requirements. However, the

dominant noise source affecting the preferred location of the building is from outdoor nursery

noise. During the site visit this occurred for relatively long periods of time, and certainly during

periods when the school would be expected to be teaching internally. The noise from the

nursery is discussed separately below.

7 Implications for Ventilation

7.1 BB93 External Noise Sources

The intention is to naturally ventilate the proposed building. Based on the proposed layout

shown in Figure 3 the reception classroom to the north of the building, and other rooms with

windows in the north, west and east façade only, will be exposed to external noise levels of

50dB LAeq from offCsite noise sources during normal school hours, increasing to around LAeq 53

dB on the south facade.



Figure 3 – Proposed Layout in Preferred Location

Background ventilation of 3 l/s/p can be provided through small window openings where sound

insulation of 15 dB(A) can be achieved. Hence under conditions with small openings, internal

levels will be LAeq 35C38 dB. With windows open to provide higher levels of ventilation (8 l/s/p

+) attenuation of 10dB(A) can be assumed through the façade. This will results in internal

levels which would just comply the LAeq 40 dB limit on three facades obtained by applying the

5dB relaxation allowable under BB101 for naturally ventilated school buildings.

However, using basic natural ventilation with openable windows would result in an exceedance

of the BB93/BB101 limits in the three classrooms with windows in the south façade from road

noise alone.

7.2 Nursery Noise

BB93/BB101 internal noise limits do not apply school activity noise. However, if the nursery

remains operational as it was during the noise survey, most classrooms in the proposed

teaching block will have extremely unsatisfactory acoustic conditions. At the attended

monitoring location noise levels from the nursery play area consistently exceeded 65dBA LA01

and 55dB LAeq. The external noise level would be around LAeq 55C60 dB typically depending

upon the activity.



The measurement location was further from the nursery play area than the proposed southern

façade and therefore actual noise levels incident on the building will be higher. In addition,

noise from young children at play and nursery staff could be considered to be particularly

distracting to children in class and may also have a greater masking effect on teachers’ voices

than traffic noise, reducing speech intelligibility.

Unfortunately, times when the nursery outside play area is likely to be in use coincide with

times when higher levels of ventilation are required. Therefore, if the nursery is to remain

operational, we would recommend that openable windows or other unattenuated ventilation

should not be used for ventilation in the southern façade. As the building is single story,

natural ventilation may be possible through other means, for example via attenuated wind

scoops (eg windcatchers) on the roof. The glazing and façade construction should be

considered at a later design stage to ensure they will provide adequate protection from nursery

noise.

If the nursery is not to remain operational in its present form then adequate attenuation of

Booth Lane North road noise can just about be achieved with openable windows but these

should be side hung casement windows with the hinges to the east to provide some protection

when the windows are open. Alternatively an alternative performance standard could be

sought as described in section 5.2.

8 External Plant Noise Limits

It is unlikely that there will be any mechanical services plant associated with the new scheme,

and therefore, there would be no need for control of external plant. However, if plant were

added then the background noise levels measured can be used to determine the daytime plant

noise limit at nearby sensitive receptors.

This could be a requirement under a planning condition, typically at the nearest housing, or

under BREEAM if that were a project requirement. Under BREEAM 2011 Pol 05 the limit would

apply at either nearby housing or other teaching blocks in the school.

The lowest background noise level measured during the day was LA90 43 dB and this can be

used to set a relative plant noise limit.

We have consulted with Natasha Stanley, senior environmental health officer for Northampton

Borough Council. She has advised that their current criteria for plant noise are as follows:

“Assuming the plant is emitting steady noise levels, whether it cycles on and off or not, we

expect that the operational noise levels (Leq,T) from that plant should be at least 6 dB below

the minimum Background (L90, 1hour), for the times of operation, at the nearest sensitive

location. This could be an amenity space for daytime or the proximity of a bedroom window

for night time.



Ideally this should be specified in octave bands but if assessed on ACweighted levels then

there should be a BS 4142 assessment that accounts for the character.”

Therefore in principle the plant limit to be would be 6 dB below the L90 in each octave band,

which is a relatively onerous criterion. It is not common to measure the background noise level

in L90 octave bands (particularly as many meters do not record this parameter). We have

recorded spectral L90 levels in some locations, but not all.

An alternative more standard criterion has been discussed and agreed with NBC; specifically

that, should there be any plant, then its rating level according to BS 4142 should be 10dB(A)

below the background noise level outside nearby housing or in gardens of housing or other

relevant amenity areas. The limit would therefore be LAr 33 dB.

The limit applies to the aggregate of all new plant operating

The BREEAM 2011 Pol 05 limit requires the rating level as defined by BS 7445 to not exceed the

background noise levels, LA90, by more than 5dB(A) outside nearby noise sensitive

developments. Hence a limit of 48 dB(A) would also apply outside the existing school teaching

room windows and at the nearby housing.

9 Summary

An external noise survey has been carried out at the existing Boothville Primary School in

Northampton. The dominant offCsite noise source affecting the school is Booth Lane North.

Environmental noise levels incident on the southern façade of the proposed building on the

preferred site, from road noise alone will be slightly over LAeq 50 dB. Based on this, the

proposed natural ventilation design could achieve appropriate internal noise levels provided the

suggested mitigation is adhered to. However, there is significant noise from the nursery

outdoor playground and we would recommend that if the new block were to remain in its

current location, then attenuated ventilation should be provided.

Boothville Primary School – Appendix A

Photos

A532/R06 18th October 2012 Page B1

Primary Monitoring Location

Boothville Primary School – Appendix B

Octave Band Survey Data

A532/R06 18th October 2012 Page B1

Primary Measurement Location ( Octave Band Data

63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz

10/10/2012 11:40 00:08:04 53.0 58.2 50.0 46.3 47.7 50.2 46.2 37.8 29.3

10/10/2012 11:59 00:10:00 49.4 57.2 53.1 44.5 43.8 46.6 41.7 34.8 30.7

10/10/2012 12:11 00:09:45 54.3 57.3 52.7 47.7 47.6 50.6 49.0 40.3 32.6

10/10/2012 16:00 00:10:00 51.0 61.6 59.4 51.1 48.4 46.2 39.2 32.9 29.0

10/10/2012 16:13 00:09:44 50.5 58.7 52.6 46.7 45.3 47.6 42.7 36.6 28.1

10/10/2012 16:34 00:10:00 51.7 60.2 56.4 51.2 48.4 48.5 41.4 31.9 25.5

10/10/2012 16:46 00:10:00 50.5 58.9 56.2 46.1 45.1 48.2 40.8 34.3 25.2

Start Time Duration (seconds) LA eq, dBLeq, dB

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