Notes
AR024885. Field measurement records and flow weighting calculation worksheet from Port of Seattle (POS) Water Quality Datalog 55-2912-01(61), site Miller DS (downstream), dated 01/14/99. Sampler initials R.P.; weather noted as light rain, 0630. Twelve water samples (bottles 1A–12B) collected between 0635 and 0920; water level measurements taken from top of culvert to water surface, with 53 inches from top of culvert to substrate noted. Field measurements include pH 6.10, DO 7.8 mg/l, temperature readings. Water levels ranged from 21.5 to 27.0 inches; flow values ranged 8–16. Flow weighting calculation worksheet records pipe size 4×4.3, total storm flow 122,400, subsample volumes summing to 6000 mL. Document is part of PCHB Third Runway EIS administrative record.