appendix a – figures

Grenfell Stage 2 Investigation into Project number: 60632092Potential Land Contamination Impacts

Prepared for: Royal Borough of Kensington and Chelsea AECOM

Appendix A – FiguresA1 - Grenfell Tower Site Location Map

A2 - Grenfell Tower Sampling Areas for Stages 1 and 2

A3 - Sampling Areas for Stages 1 and 2 with Historical Potentially Contaminative Land Uses

A4 - Average Antimony Concentrations

A5 - Average Dioxin-like PCB Concentrations

A6a - Average Chlorinated Dioxins and Furans Concentrations – Shallow samples on Grass/Turfand Bare Soil

A6b - Average Chlorinated Dioxins and Furans Concentrations – Shallow samples on Bare Soilonly

A7a - Individual Chlorinated Dioxins and Furans Concentrations – Shallow samples on Grass/Turfand Bare Soil

A7b - Individual Chlorinated Dioxins and Furans Concentrations – Shallow samples on Bare Soilonly

A8a - Lead Concentrations with GSC and Background Data – Shallow samples up to 5km

A8b - Lead Concentrations with GSC and Background Data – Shallow samples up to 500m

A8c - Chlorinated Dioxins and Furans Concentrations – Shallow samples up to 5km

A8d - Chlorinated Dioxins and Furans Concentrations – Shallow samples up to 500m

A8e - BaP Concentrations with GSC and Background Data – Shallow samples up to 5km

A8f - BaP Concentrations with GSC and Background Data – Shallow samples up to 500m

A8g - Dioxin-like PCB Concentrations with GSC and Background Data – Shallow samples up to5km

A8h - Dioxin-like PCB Concentrations with GSC and Background Data – Shallow samples up to500m

A8i - Antimony Concentrations with GSC and Background Data – Shallow samples up to 5km

A8j - Antimony Concentrations with GSC and Background Data – Shallow samples up to 500m

A9a - Box and whisker plots of chlorinated dioxins and furans summary statistics

A9b - Box and whisker plots of lead summary statistics

A9c - Box and whisker plots of benzo(a)pyrene summary statistics

A9d - Box and whisker plots of antimony summary statistics

A9e - Box and whisker plots of dioxin-like PCB summary statistics

Oxford Gardens Primary School 1km500m250m100m50m

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MidpointAlençon Link, BasingstokeHampshire, RG21 7PPTelephone (01256) 310200Fax (01256) 310201www.aecom.com

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FIGURE A1 01

THIS DOCUMENT HAS BEEN PREPARED PURSUANT TO AND SUBJECT TO THETERMS OF AECOM'S APPOINTMENT BY ITS CLIENT. AECOM ACCEPTS NO LIABILITY

FOR ANY USE OF THIS DOCUMENT OTHER THAN BY ITS ORIGINAL CLIENT ORFOLLOWING AECOM'S EXPRESS AGREEMENT TO SUCH USE, AND ONLY FOR THE

PURPOSES FOR WHICH IT WAS PREPARED AND PROVIDED.

AECOM Internal Project No. Scale @ A3

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Tower Cordon

Radial Distance from Tower

GRENFELL TOWER SITE LOCATION MAP

ROYAL BOROUGH OF KENSINGTON & CHELSEA

THIS DRAWING IS TO BE USED ONLY FOR THE PURPOSE OFISSUE THAT IT WAS ISSUED FOR AND IS SUBJECT TO AMENDMENT

Copyright

Contains Ordnance Survey Data © Crown Copyright and database right 2019.Contains public sector information licensed under the Open Government Licence v3.0. © Crown Copyright and Landmark Information Group Limited 2019. All rights reserved. Service Layer Credits: © OpenStreetMap (and) contributors, CC-BY-SA

GRENFELL STAGE 2ASSESSMENT

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Tower Cordon

Sample Areas

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Investigation area indicativeboundary

Indicative Plume ExtentDeposition (g/m^2)

1.0e+00 - 3.2e+00

3.2e-01 - 1.0e+00

1.0e-01 - 3.2e-01

3.2e-02 - 1.0e-01

1.0e-02 - 3.2e-02

3.2e-03 - 1.0e-02

1.0e-03 - 3.2e-03

GRENFELL TOWER SAMPLING AREAS FOR STAGES 1 AND 2



Copyright



Solid investigation area indicative boundarydelimits a 500m radius from Grenfell Tower

Dashed investigation area indicativeboundary shows area encompassing core ofmodelled plume and specific sites identifiedfor sampling in the Stage 2 detailed design

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LEGENDTower CordonSampleRadial Distance from Tower

Landmark Envirocheck datainformation

Above Ground Storage TanksHistorical Map InterpretationTrade Directory InformationBelow Ground Storage Tanks

Historic Tanks") Electrical Sub Station Facilities") Potential Tanks") Tanks

Potentially Infilled Land (Non-Water)Unknown Filled Ground (Pit, quarry etc)

Potentially Contaminative IndustrialUses (Past Land Use) - Point Features!( Coal storage and depot!( Metal casting/foundries

RailwaysSewageClay bricks & tiles [manufacture]Factory or works - use not specifiedHospitalsRailwaysRoad haulageRBKC identified potentially contaminatedlandLBHF identified potential contaminatedsitesRBKC identified areas ofGeoenvironmental interestRBKC registered trade directory entriesRBKC Sites of Geoenvironmental Interestbased on Historic Maps

SAMPLING AREAS FOR STAGES 1 AND 2 WITH

HISTORICAL POTENTIALLY CONTAMINATIVE LAND USES



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500m Buffer Intervals

Mean antimony concentration (mg/kg)

0--2

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1.0e-02 - 3.2e-02

3.2e-03 - 1.0e-02

1.0e-03 - 3.2e-03

STAGE 2 AVERAGE ANTIMONY

CONCENTRATIONS

GRENFELL PHASE 2ASSESSMENT

ROYAL BOROUGH OFKENSINGTON & CHELSEA


Copyright

Contains Ordnance Survey Data © Crown Copyright and database right 2020

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Stage 1 and Stage 2 Sites Average Dioxin likePCBs (µg/kg)

0.4 - 1.0

1.0 - 2.0

2.0 - 3.0

3.0 - 4.0

4.0 - 5.0

6.0 - 33.0


1.0e+00 - 3.2e+00

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1.0e-01 - 3.2e-01

3.2e-02 - 1.0e-01

1.0e-02 - 3.2e-02

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1.0e-03 - 3.2e-03

STAGE 1 AND 2 AVERAGE DIOXIN-LIKE PCBS TOPSOIL

CONCENTRATIONS




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LEGEND

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Concentration range (ng/kg)

<500

500-1500

1500-3000

3000-4500

4500-6000

6000-7500

>9000

Indicative Plume Extent

Deposition (g/m^2)

1.0e+00 - 3.2e+00

3.2e-01 - 1.0e+00

1.0e-01 - 3.2e-01

3.2e-02 - 1.0e-01

1.0e-02 - 3.2e-02

3.2e-03 - 1.0e-02

1.0e-03 - 3.2e-03

STAGE 1 & STAGE 2 AVERAGE SUM OF 17

CHLORINATED DIOXINS & FURANS CONCENTRATION




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LEGEND

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Concentration range (ng/kg)

<500

500-1500

1500-3000

3000-4500

4500-6000

6000-7500

7500-9000

>9000


1.0e+00 - 3.2e+00

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3.2e-03 - 1.0e-02

1.0e-03 - 3.2e-03

STAGE 1 & STAGE 2 AVERAGE SUM OF 17

CHLORINATED DIOXINS & FURANS CONCENTRATION,

BARE SOIL ONLY




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GTCS2-S140A724

GTCS2-S012A153

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GTCS 1-37 1156

GTCS 1-38 215

GTCS2-S251A174 GTCS2-S256A 686

GTCS2-S261A 1139 GTCS2-S266A 175

GTCS2-S294A272

GTCS2-S299A341

GTCS2-S361A128

GTCS2-S363A 229

GTCS2-S365A208GTCS2-S367A

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GTCS2-S377A160 GTCS 1-39 758

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Sum 17 Chlorinated dioxins & furans(ng/kg)

!( >2000

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SOIL SAMPLE RESULTS SUMOF 17 CHLORINATED DIOXINS& FURANS CONCENTRATION




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GTCS 1-21 650

GTCS 1-49 966

GTCS 1-45 619

GTCS 1-04 453

GTCS 1-03 429GTCS 1-02 272

GTCS 1-32 772

GTCS 1-36 762GTCS 1-35 528

GTCS 1-34 416

GTCS 1-10 866

GTCS 1-08 830

GTCS 1-07 939

GTCS 1-26 289

GTCS 1-25 622

GTCS 1-14 435GTCS 1-13 491

GTCS 1-28 578

GTCS 1-27 498

GTCS 1-20 530

GTCS 1-19 581

GTCS 1-17 727

GTCS 1-16 1149

GTCS 1-48 4961GTCS 1-09 2499

GTCS 1-12 1761

GTCS 1-06 1212

GTCS 1-05 1689

GTCS 1-18 1228

GTCS2-S089A 151

GTCS2-S062A 601

GTCS2-S381A 586

GTCS2-S360A 493

GTCS2-S327A 869

GTCS2-S322A 663

GTCS2-S305A 902

GTCS2-S028A 310

GTCS2-S023A 784

GTCS2-S272A 651

GTCS2-S239A 651GTCS 1-11 11771

GTCS2-S216A 615

GTCS2-S195A 631

GTCS2-S141A 673

GTCS 1-30 11347GTCS2-S128A 227

GTCS2-S117A 573

GTCS2-S112A 534

GTCS2-S006A 436

GTCS2-S084A 1022

GTCS2-S034A 2255

GTCS2-S338A 9317

GTCS2-S223A 2006

GTCS2-S189A 1592

GTCS2-S184A 1810

GTCS2-S106A 3240

GTCS2-S101A 7600

GTCS2-S100A 3969 GTCS2-S283A 15507

GTCS 1-51 829GTCS 1-52 728GTCS 1-53 644GTCS 1-54 853GTCS 1-55 731GTCS 1-56 792

GTCS 1-57 1408GTCS 1-58 1361GTCS 1-59 1314

GTCS 1-44 625

GTCS 1-01 154

GTCS 1-33 448

GTCS 1-15 1410GTCS 1-50 5413

GTCS 1-47 2407

GTCS 1-46 5824GTCS 1-43 6949

GTCS 1-31 2102

GTCS2-S389A 206GTCS2-S388A 255

GTCS2-S386A 362

GTCS2-S383A 334

GTCS2-S349A 866

GTCS2-S317A 280

GTCS2-S311A 248

GTCS2-S245A 631

GTCS2-S234A 175

GTCS2-S200A 264

GTCS2-S344A 2677

GTCS2-S310A 1299

GTCS2-S288A 2419

GTCS2-S095A 3544

GTCS2-S123A 1422

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GTCS2-S101A7600

GTCS2-S106A3240

GTCS2-S123A1422

GTCS 1-3011347

GTCS2-S141A673

GTCS 1-17 727

GTCS 1-181228

GTCS2-S223A2006

GTCS 1-1111771

GTCS 1-121761

GTCS 1-25 622

GTCS 1-26 289

GTCS2-S245A631

GTCS 1-371156

GTCS2-S261A1139

GTCS2-S272A651

GTCS2-S283A15507

GTCS2-S288A2419

GTCS2-S023A784

GTCS2-S311A248

GTCS2-S327A869

GTCS2-S338A9317

GTCS2-S386A362

GTCS2-S034A2255

GTCS 1-472407

GTCS 1-48 4961

GTCS 1-49 966

GTCS 1-591314

GTCS 1-23 522

GTCS 1-39 758

GTCS 1-401252

GTCS2-S051A336

GTCS2-S062A601

GTCS2-S084A1022

GTCS2-S089A151

1km

500m

Project Title

Drawing Title

Drawn Checked


AECOM

DateApproved

RevDrawing Number

FIGURE A7B 01





60632092 1:5,000

GM GC DD 02/06/2021

Client

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A7B

- Su

m 17

Chlo

rinate

d diox

ins fu

rans

Bar

e Soil

.mxd

±

0 100 200 300 400 500 600 m

LEGEND

_̂ Grenfell Tower


Sum 17 Chlorinated dioxins & furans (ng/kg) -Bare Soil

!( >2000

!( 2000-4000

!( 4000-6000

!( 6000-8000

!( 8000-10000

!( 10000-12000

!( >14000

SOIL SAMPLE RESULTS SUM OF 17 CHLORINATED DIOXINS &

FURANS CONCENTRATION, BARE SOIL ONLY




Copyright


!(

!(GTCS2-S140A 724

GTCS2-S138A 6324km

3.5km

Grenfell Investigation into Potential Land Contamination Impacts Figure A8a - Lead concentrations comparison with GSC and backgrounddata - shallow samples, up to 5km radius from Grenfell Tower

Project number: 60632092


0

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0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

Lead

(mg/

kg)

Distance from Grenfell Tower (m)

0-0.05m depth excluding raised beds 0-0.02m depth excluding raised bedsLondon Earth datapoints GSC for Resi+HPLondon Earth Background Minimum London Earth Background MaximumLondon Earth Background Mean Normal Background Concentration

London Earthbackground range

Grenfell Investigation into Potential Land Contamination Impacts Figure A8b - Lead concentrations comparison with GSC and backgrounddata - shallow samples, up to 500m radius from Grenfell Tower



0

500

1000

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0 50 100 150 200 250 300 350 400 450 500

Lead

(mg/

kg)


0-0.05m depth excluding raised beds 0-0.02m depth excluding raised bedsLondon Earth datapoints GSC for Resi+HPLondon Earth Background Minimum London Earth Background MaximumLondon Earth Background Mean Normal Background Concentration

London Earthbackground range

Grenfell Investigation into Potential Land Contamination Impacts Figure A8c - Chlorinated dioxins and furans concentrations comparison withbackground data - shallow samples, up to 5km radius



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10000.00

12000.00

14000.00

16000.00

18000.00

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

Sum

of C

hlor

inat

ed D

ioxi

ns a

nd F

uran

s (ng

/kg)


0-0.05m depth excluding raised beds 0-0.02m depth excluding raised beds EA Background MinimumEA Background Maximum EA Background Mean

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8d - Chlorinated dioxins and furans concentrations comparison withbackground data - shallow samples, up to 500m radius



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2000.00

4000.00

6000.00

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10000.00

12000.00

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16000.00

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0 50 100 150 200 250 300 350 400 450 500

Sum

of C

hlor

inat

ed d

ioxi

ns a

nd fu

rans

(ng/

kg)


0-0.05m depth excluding raised beds 0-0.02m depth excluding raised beds EA Background Minimum

EA Background Maximum EA Background Mean

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8e - Benzo(a)pyrene concentrations comparison with GSC and backgrounddata - shallow samples, up to 5km radius from Grenfell Tower



0.00

5.00

10.00

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20.00

25.00

30.00

35.00

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

BaP

(mg/

kg)


0-0.05m depth excluding raised beds 0-0.02cm depth excludin graised beds GSC - Resi+HP

EA Background Minimum EA Background Maximum EA Background Mean

Normal Background Concentration

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8f - Benzo(a)pyrene concentrations comparison with GSC and backgrounddata - shallow samples, up to 500m radius from Grenfell Tower



0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

0 50 100 150 200 250 300 350 400 450 500

BaP

(mg/

kg)


0-0.05m depth excluding raised beds 0-0.02m depth excluding raised beds GSC - Resi+HP

EA Background Minimum EA Background Maximum EA Background Mean

Normal Background Concentration

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8g - Sum of 12 dioxin-like PCBs concentrations comparison with backgrounddata - shallow samples, up to 5km radius



0.00

50.00

100.00

150.00

200.00

250.00

300.00

0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

Sum

of 1

2 Di

oxin

-like

PCB

s (µg

/kg)


0-0.05m excluding raised beds 0-0.02m excluding raised beds EA Background Minimum EA Background Maximum EA Background Mean

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8h - Sum of 12 dioxin-like PCBs concentrations comparison with backgrounddata - shallow samples, up to 500m radius



0.00

50.00

100.00

150.00

200.00

250.00

300.00

0 50 100 150 200 250 300 350 400 450 500

Sum

of 1

2 Di

oxin

-like

PCB

s (µg

/kg)


0-0.05m excluding raised beds 0-0.02m excluding raised beds EA Background Minimum EA Background Maximum EA Background Mean

EA backgroundrange

Grenfell Investigation into Potential Land Contamination Impacts Figure A8i - Antimony concentrations - shallowsamples, up to 5km radius from Grenfell Tower



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50

100

150

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0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000

Antim

ony

(mg/

kg)


0.05m depth excluding raised beds 0.02m depth excluding raised beds Antimony GSC

Grenfell Investigation into Potential Land Contamination Impacts Figure A8j - Antimony concentrations - shallowsamples, up to 500m radius from Grenfell Tower



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50

100

150

200

250

0 50 100 150 200 250 300 350 400 450 500

Antim

ony

(mg/

kg)


0.05m depth excluding raised beds 0.02m depth excluding raised beds Antimony GSC

Grenfell Investigation into Potential Land Contamination Impacts Figure A9a - Box and whisker plots of chlorinated dioxins and furans summary statistics Project number: 60632092


Grenfell Investigation into Potential Land Contamination Impacts Figure A9b - Box and whisker plots of lead summary statistics Project number: 60632092


Grenfell Investigation into Potential Land Contamination Impacts Figure A9c - Box and whisker plots of BaP summary statistics Project number: 60632092


Grenfell Investigation into Potential Land Contamination Impacts Figure A9d - Box and whisker plots of antimony summary statistics Project number: 60632092


Grenfell Investigation into Potential Land Contamination Impacts Figure A9e - Box and whisker plots of dioxin-like PCB summary statistics Project number: 60632092


appendix a – figures

Documents