Kirkhollow Analytical Laboratories Ltd

Braithe Road, Vardenne BR7 2HD 01632 960118 · reception@kirkhollow-labs.example

Ms R. Sandiman Braithe Estuary Partnership Estuary House, Vardenne Quay Braithe BR3 4LN

Our reference: KAL-11938/26
Date of report: 4 February 2026

### Certificate of analysis

Dear Ms Sandiman

Thank you for the four water samples delivered to this laboratory on 28 January 2026. They were booked in as batch KAL-11938 and analysed by the methods shown. The results below relate only to the samples as received.

<table>
  <tbody>
    <tr>
      <td>Sampling point</td>
      <td>Vardenne Channel, station VQ1</td>
    </tr>
    <tr>
      <td>Date and time of sampling</td>
      <td>27 January 2026, 09:40</td>
    </tr>
    <tr>
      <td>Total suspended solids</td>
      <td>41.6 mg/l (method KAL-M04)</td>
    </tr>
    <tr>
      <td>Chloride</td>
      <td>18,200 mg/l (method KAL-M11)</td>
    </tr>
    <tr>
      <td>Ammoniacal nitrogen</td>
      <td>0.42 mg/l (method KAL-M12)</td>
    </tr>
    <tr>
      <td>Dissolved organic carbon</td>
      <td>5.9 mg/l (method KAL-M22)</td>
    </tr>
  </tbody>
</table>

The suspended solids figure is higher than those reported for this station in December and January, which were both below 30 mg/l. The samples were taken on the ebb, two days after the last placement at Kellow Sands, and the result is consistent with that.

The remaining samples will be held until 4 March 2026 and destroyed after that date unless you ask us to keep them.

Yours sincerely

Dr A. J. Prosser
Laboratory Manager

Registered in England 2214887 · Results relate only to the samples as received