In the case an unexpired secondary source standard (with a unique manufacturing lot#) is not commercially available for any of the required analytes, can a secondary standard prepared from the same source material be used?
Yes
Multiple part question
Section 1D, Work Plan (page10 of RFP). Based on your knowledge (research or experience) of the chemical behavior and stability characteristics of these analytes in water samples, please provide any guidance on the following:
You should develop your methods to provide us the best results.
1. recommended water sample preservatives and dechlorination procedures
You should develop your methods to provide us the best results.
You should develop your methods to provide us the best results.
2. recommended maximum hold times
You should develop your methods to provide us the best results.
You should develop your methods to provide us the best results.
3. recommended sampling containers (if not amber glass jars)
You should develop your methods to provide us the best results.
You should develop your methods to provide us the best results.
4. whether water sample aliquots can be frozen in polypropylene containers to extend hold time, especially in cases where retesting is needed
You should develop your methods to provide us the best results.
