REFERENCE CHART: HOLDING TIME, BOTTLE TYPE, …
1000 mL required for RL of 5 mg/L. 250 mL bottle recommended for samples with expected concentrations of 20 mg/L or higher. {11} If unpreserved, must be analyzed within 7 days of sampling {12} Hold time can be extended to 14 days if preserved to pH 4-5 at time of collection.
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