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 class="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

handwritten signature

Dr A. J. Prosser Laboratory Manager