OREGON STATE UNIVERSITY

Grain-size Analysis of Sediment, Dry Method

This method determines particle size distribution of granular sediments within each horizon of the soil profile. A weighed 
sample of dry granular sediment is separated through a series of sieves with progressively smaller openings. Particle size 
distribution is determined by weighting the material retained in each sieve and dividing these weights by the total dry 
weight of the sample. Fee includes sample preparation, data collection, data analysis, report generation and transmittal of 
data to customer. First sample in a request is charged the Max rate, which includes equipment set-up, supplies and 
equipment tear-down. All additional samples in the same request are charged the lower rate as these activities have 
already been paid for.

RotapThis method determines particle size distribution of granular sediments within each horizon of the soil profile. A weighed sample of dry granular sediment is processed through a nested set of standarized sieves with progressively smaller openings. Particle size distribution is determined by weighing the material retained in each sieve and dividing these weights by the total dry weight of the sample.

Fee includes sample preparation, data collection, data analysis, report generation and transmittal of data to customer. First sample in a request is charged the max rate, which includes equipment set-up, supplies and equipment tear-down. 

Cost: $31.00 for first sample, $10.00 for each additional sample.

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