Standard Operating Procedure NPDES WASTEWATER .
Sample means the medium, the sample bottle and preservative or growth reagents. It includes those materials that cannot be readily separated from the medium that is sampled. Sampling equipment is anything the medium contacts before becoming a sample. Grab sample is an individual sample collected over a period of time not to exceed 15 minutes and is
Standard Operating Procedure NPDES WASTEWATER .
At the time you take your first sample, the plant''s flow is 40,000 gal/day, so you can calculate the volume of the 1st aliquot as follows: Aliquot sample volume, mL =.,,, Aliquot sample volume, mL = 133 mL So, 133 mL of sample water from bottle #1 should be added to the composite jug for analysis.