Common use of SAMPLE HOLDING TIME Clause in Contracts

SAMPLE HOLDING TIME. Listed below is the maximum sample holding time for the most commonly requested or critical analyses. The times listed are the maximum times that samples may be held before analysis and the data still considered valid. The times listed are in accordance with the analysis methods and sample preservation described in the preceding section. Samples may be held longer only if Contractor can show by historical data that samples with the specific matrix under consideration are stable longer than listed below. Conductivity 28 days Turbidity 48 hours pH 6 hours NO2+NO3 28 days NH3 28 days TKN 28 days Total PO4 28 days Orthophosphate 48 hours TSS 7 days VSS 7 days General Mineral Group (except NO3) 24 Days NO3 48 hours Conductivity 28 days pH 6 hours NO2/NO3 28 days NH3 28 days TKN 28 days Total PO4 28 days XXX 0 days Sulfate 28 days Chloride 28 days Sodium 6 months Metals (Cd, Cr, Cu, Fe, Ni, Pb, Zn) 6 months Odor and Taste 1 day MBAS 48 Hours TOC 28 Days PCB's 7 Days (aqueous) 14 Days (sediment) Pesticides and Herbicides 7 Days (aqueous) 14 Days (sediment) Extractable Organics 7 Days (aqueous) 14 Days (sediment) Volatile Organics 14 Days Phenolics 28 Days Oil and Grease 28 Days

SAMPLE HOLDING TIME. Listed below is the maximum sample holding time for the most commonly requested or critical analyses. The times listed are the maximum times that samples may be held before analysis and the data still considered valid. The times listed are in accordance with the analysis methods and sample preservation described in the preceding section. Samples may be held longer only if Contractor can show by historical data that samples with the specific matrix under consideration are stable longer than listed below. Conductivity 28 days Turbidity 48 hours pH 6 hours NO2+NO3 28 days NH3 28 days TKN 28 days Total PO4 28 days Orthophosphate 48 hours TSS 7 days VSS 7 days General Mineral Group (except NO3) 24 Days NO3 48 hours Conductivity 28 days pH 6 hours NO2/NO3 28 days NH3 28 days TKN 28 days Total PO4 28 days XXX 0 TFR 7 days Sulfate 28 days Chloride 28 days Sodium 6 months Metals (Cd, Cr, Cu, Fe, Ni, Pb, Zn) 6 months Odor and Taste 1 day MBAS 48 Hours TOC 28 Days PCB's 7 Days (aqueous) 14 Days (sediment) Pesticides and Herbicides 7 Days (aqueous) 14 Days (sediment) Extractable Organics 7 Days (aqueous) 14 Days (sediment) Volatile Organics 14 Days Phenolics 28 Days Oil and Grease 28 Days