{"id":"38eec7a8-bac1-4406-a509-8980190e39b6","created_at":"2025-09-04T17:45:11.874Z","updated_at":"2026-01-20T21:22:00.392Z","owner_id":"15a4d0b8-d75c-43ff-a9b6-7ddef297b02b","location_id":"77acfa66-a8de-4f73-8495-d08185e8ac2a","dataset_id":"b1189ca2-c55d-44eb-a716-d22c1db254cc","form_id":"6f469672-9367-46ab-bf16-25ef6445a46d","observed_at":"2024-09-16T11:30:00.000Z","notes":"just noticed that my Chemetrics dissolved oxygen reference samples have an exp date of June 2021.  The self-filling ampules expire next month. I'm wondering if the expiration of the reference samples accounts for the negligible difference along the array is what makes this measurement so subjective.","checked":"qc_complete","qa_notes":null,"qa_admin_notes":"","qa_admin_notes_author_id":null,"qa_admin_notes_updated_at":null,"tested_parameters":["ph","oxygen","secchi_depth","hardness","alkalinity","water_depth","conductivity","air_temperature","water_temperature","current_weather","current_weather_description","previous_weather","previous_weather_description","chlorine"],"readings":[{"id":"3fe88471-7a6d-4a2e-80cf-9c92d3a90df2","created_at":"2025-09-04T17:45:11.993Z","updated_at":"2025-09-04T17:45:11.993Z","parameter":"ph","unit":"std_units","value":"7.8","equipment_limit":null},{"id":"7b49d6e4-91af-451b-bef0-e7242f70856a","created_at":"2025-09-04T17:45:12.014Z","updated_at":"2025-09-04T17:45:12.014Z","parameter":"oxygen","unit":"mg_l","value":"9","equipment_limit":null},{"id":"db334ac4-33ba-412b-bd35-ccbf8403aeb0","created_at":"2025-09-04T17:45:12.062Z","updated_at":"2025-09-04T17:45:12.062Z","parameter":"secchi_depth","unit":"m","value":"bottom_visible","equipment_limit":null},{"id":"61f12d19-ea21-4aba-a55e-e7a35cfcfa1f","created_at":"2025-09-04T17:45:12.100Z","updated_at":"2025-09-04T17:45:12.100Z","parameter":"hardness","unit":"ppm","value":"150","equipment_limit":null},{"id":"b427892d-e0b9-4ea2-bda2-a8d109dd467c","created_at":"2025-09-04T17:45:12.116Z","updated_at":"2025-09-04T17:45:12.116Z","parameter":"alkalinity","unit":"ppm","value":"180","equipment_limit":null},{"id":"479003f3-7eea-44bd-bb61-9796bc8aa837","created_at":"2025-09-04T17:45:12.131Z","updated_at":"2025-09-04T17:45:12.131Z","parameter":"water_depth","unit":"m","value":"1.4","equipment_limit":null},{"id":"9fed3ba3-3151-4cd7-b441-2d447b669fc4","created_at":"2025-09-04T17:45:12.146Z","updated_at":"2025-09-04T17:45:12.146Z","parameter":"conductivity","unit":"us_cm","value":"209","equipment_limit":null},{"id":"c2adbc6c-b2b2-44f1-a9d5-c42b1b27c7d5","created_at":"2025-09-04T17:45:12.172Z","updated_at":"2025-09-04T17:45:12.172Z","parameter":"air_temperature","unit":"deg_c","value":"25","equipment_limit":null},{"id":"01827be0-f5fd-47e0-876e-22476329ba0f","created_at":"2025-09-04T17:45:12.190Z","updated_at":"2025-09-04T17:45:12.190Z","parameter":"water_temperature","unit":"deg_c","value":"22.4","equipment_limit":null},{"id":"fdd60f08-7fd7-4e01-ad9e-a8f899db2233","created_at":"2025-09-04T17:45:12.206Z","updated_at":"2025-09-04T17:45:12.206Z","parameter":"current_weather","unit":"nil","value":"sunny","equipment_limit":null},{"id":"5736e846-f4f1-4f13-9b66-1671ee4b74e2","created_at":"2025-09-04T17:45:12.221Z","updated_at":"2025-09-04T17:45:12.221Z","parameter":"current_weather_description","unit":"nil","value":"wind 0 kmh, 63% humidity","equipment_limit":null},{"id":"4a10ea3a-2207-472c-9914-1be81ad524c9","created_at":"2025-09-04T17:45:12.235Z","updated_at":"2025-09-04T17:45:12.235Z","parameter":"previous_weather","unit":"nil","value":"sunny","equipment_limit":null},{"id":"b674e2c3-5865-4152-b8f9-6bcc06a7c38c","created_at":"2025-09-04T17:45:12.297Z","updated_at":"2025-09-04T17:45:12.297Z","parameter":"previous_weather_description","unit":"nil","value":"clear and warm for several days. yesterday 29c high","equipment_limit":null},{"id":"34737e44-b486-42fd-9920-728234b5ce18","created_at":"2025-09-04T17:45:12.085Z","updated_at":"2025-11-19T15:02:48.109Z","parameter":"chlorine","unit":"ppm","value":"0","equipment_limit":"<="}]}