North East File Collection - NEFC

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===== Request =====

[[https://www.whatdotheyknow.com/request/eir_request_comah_chemical_inven|18th March 2026]]

Dear South Tees Development Corporation,

As the body responsible for the South Tees Site, I am requesting specific data regarding the management of hazardous chemical legacies inherited from the South Tees Site Company and responsible for the site's classification as a COMAH Upper Tier site.

To understand the environmental context of the site’s redevelopment, please provide:

**Request:** Documentation transferred from South Tees Site Company or held by STDC which details the chemical inventory annually related to the COMAH Upper Tier status until COMAH Upper Tier status was removed.

Please handle this request under the Environmental Information Regulations (EIR) 2004, which provide for greater transparency on matters affecting the environment.

===== Response =====

15th May 2026

Environmental Information Regulations (EIR) 2004 Act - Reference: STDC-008-2026.

Thank you for your request for information received on 18/03/2026. In response to your request, we can now provide the attached response and information.

If you have any queries or concerns, please contact [1][STDC request email] in the first instance.  

Please remember to quote the reference number above in any future communications. 

If you are unhappy with the way your request for information has been handled, you may request an internal review within 40 working days by writing to:  
   * Group Interim Monitoring Officer, South Tees Development Corporation, Teesside Airport Business Suite, Teesside International Airport, Darlington. DL2 1NJ. 

If, after your complaint has been determined, you remain dissatisfied with the handling of your request or complaint, you have a right to appeal to the Information Commissioner at:  
   * The Information Commissioner's Office (ICO), Wycliffe House, Water Lane, Wilmslow, Cheshire, SK9 5AF, Telephone: 0303 123 1113, Website: [2][[https://ico.org.uk/make-a-complaint/]]. The ICO does not make a charge for an appeal. 

Yours sincerely,  [4][email address]  

TVCA Governance on behalf of South Tees Development Corporation, Teesside Airport Business Suite | Teesside International Airport, Darlington DL2 1NJ. [5][[https://www.teesvalley-ca.gov.uk]] 

References

Visible links
   - [[https://acrobat.adobe.com/id/urn:aaid:sc:EU:e150af6e-d66b-4bec-ad90-c2a78dcc4ef1|https://acrobat.adobe.com/id/urn:aaid:sc...]]
   - mailto:[stdc%20request%20email]
   - [[https://ico.org.uk/make-a-complaint/]]
   - mailto:[email%20address]
   - [[http://www.teesvalley-ca.gov.uk/]]
==== Summary Presentations ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/2021 Teesworks COMAH Inventory_Rev 1_210820.pdf|210820 Teesworks COMAH Inventory and Demolition Programme - Slide Show]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/2022 Remaining COMAH Inventory_221006.pdf|221006 Teesworks COMAH Inventory and Demolition Programme - Slide Show]]

==== Whole Site COMAH Inventory ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/230111 STSC COMAH Substances Inventory.pdf|230111 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230131 STSC COMAH Substances Inventory.pdf|230131 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230207 STSC COMAH Substances Inventory.pdf|230207 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230214 STSC COMAH Substances Inventory.pdf|230214 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230301 STSC COMAH Substances Inventory.pdf|230301 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230321 STSC COMAH Substances Inventory.pdf|230321 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230323 STSC COMAH Substances Inventory.pdf|230323 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230405 STSC COMAH Substances Inventory.pdf|230405 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230412 STSC COMAH Substances Inventory.pdf|230412 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230502 STSC COMAH Substances Inventory.pdf|230502 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230531 STSC COMAH Substances Inventory.pdf|230531 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230616 STSC COMAH Substances Inventory.pdf|230616 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230629 STSC COMAH Substances Inventory.pdf|230629 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230718 STSC COMAH Substances Inventory.pdf|230718 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230803 STSC COMAH Substances Inventory.pdf|230803 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230807 STSC COMAH Substances Inventory.pdf|230807 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230814 STSC COMAH Substances Inventory.pdf|230814 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230905 STSC COMAH Substances Inventory.pdf|230905 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/230926 STSC COMAH Substances Inventory.pdf|230926 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/231013 STSC COMAH Substances Inventory.pdf|231013 Current Inventory of COMAH Dangerous Substances Present at STSC]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/231121 STSC COMAH Substances Inventory.pdf|231121 Current Inventory of COMAH Dangerous Substances Present at STSC]]



[[this>EIR/STDC/260515COMAH Chemical Inventory/B&M - Waste Compound Tracker 02-05-2023.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/B&M - Waste Compound Tracker 16-05-2023.pdf]]

==== Waste Register ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/BOS Plant - Waste Register 230119.pdf|230119 BOS Plant - Waste Register - Thompsons - Vehicle Movements]] mainly to Highfield Environmental or Augean - 5th August 2021 to 16th February 2023

[[this>EIR/STDC/260515COMAH Chemical Inventory/BOS Plant - Waste Register Rev 1 230323.pdf|230323 BOS Plant - Waste Register - Thompsons - Vehicle Movements]]  mainly to Highfield Environmental or Augean - 5th August 2021 to 22nd February 2023

[[this>EIR/STDC/260515COMAH Chemical Inventory/Comah declassification rev D (002) Signed letter.pdf]]

==== Waste Compound Tracker ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230316.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230330.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230405.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230413.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230420.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230427.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230504.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230511.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230525.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230601.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230608.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230623.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230630.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230707.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230714.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230721.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230728.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Combined Waste Compound Tracker - 230804.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Compound Transfer Tracker - 230202.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Compound Transfer Tracker - 230209.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Compound Transfer Tracker - 230223.pdf]]

==== Waste Inventory ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste inventory 24.02.23.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste inventory current 230303.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste inventory current 230309.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste inventory current 230316.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste inventory current 230323.pdf]]

==== Waste Transfer Tracker ====

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230105.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230112.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230202.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230209.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230223.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230302.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230309 Rev A.pdf]]

[[this>EIR/STDC/260515COMAH Chemical Inventory/Waste Transfer Tracker-230323.pdf]]