Domestic and Wastewater Samples

Preparation:

  • Domestic Water: Run tap for several minutes to collect fresh water. Use clean containers.
  • Bacteriological (Coliform): Remove the aerator from the spigot, sanitize spigot, run tap for several minutes, fill sterilized container to the 100 ml line and chill.
  • Wastewater: Use clean containers.
  • Completely fill bottles unless procedures state otherwise. Do NOT overfill or partially fill bottles because it will affect the results of the test.
  • It is often easiest to complete the information on the bottles before filling them. Be sure to use an indelible pen.
  • Print a Work Request Form, complete and return it with your sample.
  • Place samples in cooler with plenty of ice.
  • Deliver samples promptly to Dellavalle .

Hold times to remember:

BOD, NO3-N, NO2-N48 hrs
Total Coliform, Fecal Coliform & E. coli, MPN6 hrs
pH15 min
(impossible, unless done in field); lab within 24 hrs of receipt

If you are unsure of collection procedures, please call Dellavalle.