SAMPLE HOLDING TIME Sample Clauses

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. Nutrient Group 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 Rainwater Group 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
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SAMPLE HOLDING TIME. Listed below are the maximum sample holding times for the most commonly requested or critical analyses. In cases where the published holding times, as shown in approved methods, are in conflict with the holding times listed herein, the lesser holding time shall take precedence. In general, all samples should be analyzed by CONTRACTOR as soon as possible after submission by COUNTY. The times listed are the maximum times that samples may be held before analysis and still considered valid. The COUNTY may request “rush” analyses under the conditions noted in Section 2 above, whereas the maximum sample holding times may not apply.
SAMPLE HOLDING TIME. All samples shall be analyzed by Contractor as soon as possible after submission by County. The times listed are the maximum times that samples may be held before analysis and still considered valid. 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. County may request "rush" analyses where the maximum sample holding times do not apply. Maximum Holding Time Aqueous toxicity samples 36 hours Sediment toxicity samples 14 days Chemist shall refrigerate samples when required by EPA standard methods.
SAMPLE HOLDING TIME. All samples shall be analyzed by Contractor as soon as possible after submission by County. The times listed are the maximum times that samples may be held before analysis and still considered valid. 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. County may request "rush" analyses where the maximum sample holding times do not apply. Maximum Holding Time Aqueous toxicity samples 36 hours Sediment toxicity samples 14 days Chemist shall refrigerate samples when required by EPA standard methods. Minimum Sample Volumes Upon County request, Contractor shall provide County with a table of minimum sample volumes required to conduct each of the analysis listed in the Group and Individual analyses County and Contractor will discuss program requirements and develop a mechanism to insure adequate sample volume is collected to complete required number of dilutions with each sample. Contingencies for unexpected volume changes due composite sample collections will be developed.
SAMPLE HOLDING TIME. Listed below are the maximum sample holding times for the most commonly requested or critical analyses. In cases where the published holding times, as shown in approved methods, are in conflict with the holding times listed herein, the lesser holding time shall take precedence. In general, all samples should be analyzed by CONTRACTOR as soon as possible after submission by COUNTY. The times listed are the maximum times that samples may be held before analysis and still considered valid. The COUNTY may request “rush” analyses under the conditions noted in Section 2 above, whereas the maximum sample holding times may not apply. Maximum Sample Holding Time General Mineral Group: Sodium 6 Months Potassium 6 Months Calcium 6 Months Magnesium 6 Months Carbonate 6 Months Bicarbonate 24 Months Chloride 28 Days Sulfate 28 Days Nitrate 48 Days Fluoride 28 Days Silica 28 Days Boron 6 Months Total Dissolved Solids 4 Weeks Conductivity 24 Hours Trace Metals 6 Months Purgeable Halocarbons 7 Days Purgeable Aromatics 7 Days Purgeables 7 Days Base/Neutrals & Acids 7 Days (extraction); 40 Days (analysis) Bacteriological Group 6 Hours Nutrient Group 48 Hours Rainwater Group 24 Hours Pesticides, Herbicides, PCBs 7 Days (extraction); 40 Days (analysis)

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