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total <20 *\r\n* Le seuil de détection du phosphore peut être plus élevé dans certains échantillons. Ceci est observé dans les situations où de la terre ou des algues ont été recueillies lors du prélèvement, ce qui apporte une coloration à l’eau prélevée. Dans de telles circonstances, le laboratoire considère que le taux de phosphore est en trace et difficile à être quantifié","checked":"qc_complete","qa_notes":null,"qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["secchi_depth","chlorophyll_a","dissolved_organic_carbon"],"photos":[],"permalink":"https://data.waterrangers.com/observations/74529","readings":[{"id":"69ccdc16-1f14-4bf1-9d0c-606272e7e573","created_at":"2025-08-19T22:09:01.787Z","updated_at":"2025-08-19T22:09:01.787Z","parameter":"secchi_depth","unit":"m","value":"3.3","equipment":"secchi_disk_20cm","equipment_limit":null},{"id":"ed8297a4-6fab-4871-9226-a347dda97a11","created_at":"2025-08-19T22:09:01.796Z","updated_at":"2025-08-19T22:09:01.796Z","parameter":"chlorophyll_a","unit":"ug_l","value":"1.32","equipment":"fluorometer_ug_l","equipment_limit":null},{"id":"ae41c4a2-ecc2-4fab-ae5f-48609cc20b2c","created_at":"2025-08-19T22:09:01.802Z","updated_at":"2025-08-19T22:09:01.802Z","parameter":"dissolved_organic_carbon","unit":"mg_l","value":"7.4","equipment":"lab_test_doc_infared","equipment_limit":null}]}]