SAMPLING INSTRUCTIONS FOR NITRATE ANALYSIS OF DRINKING WATER SAMPLES

 

·         The samples should be taken as close to the source as possible.  If there is a spigot in the well house, use that rather than a tap in a residence on the distribution system.

 

·         Disconnect any garden hose or appliance that may be connected to the spigot.

 

·         From the spigot or tap, run the water 2 to 3 minutes before taking the sample.

 

·         Write the necessary information (time, date, location, etc.) on the label attached to the bottle (this information should match the corresponding information on the request form)

 

·         Fill the sample container to the shoulder of the bottle

 

·         Complete the accompanying form (Public water systems must include the system ID number, the system name, the source number, whether group A or B and the date and time of sampling if the sample is to be used for compliance purposes).

 

·         Deliver the water sample and the analysis request form to the laboratory within 24 hours of sampling.

 

Please contact Twiss Analytical Labs at (360) 779-5141 if you have any questions.