MPA is applied to determine groundwater under the direct influence of surface water (GWDI) (EPA 910-9- 92-029, Oct. 1992) and assess performance of a surface water treatment plan (EPA 910/R-96-001, Apr. 1996)
MPA involves the identification, sizing, and population estimates of microorganism and organic or inorganic debris found in water.
EMSL Test Code: M653
Turnaround Time: One week or two weeks
Holding time: 48 hours
Sampling and Shipping: Filter a minimum of 500 gallons (recommend 1,000 gallons) over an 8–24 hour period per EPA requirement; ship filter overnight on ice to the lab