Sample Handling and Custody Requirements Sample Clauses
The Sample Handling and Custody Requirements clause defines the procedures and standards for collecting, labeling, transporting, storing, and tracking samples throughout a project or investigation. It typically outlines responsibilities for maintaining the integrity of samples, such as using proper containers, documenting chain of custody, and ensuring secure storage conditions. This clause is essential for preserving the validity and traceability of samples, thereby preventing contamination, loss, or disputes over sample authenticity.
Sample Handling and Custody Requirements. The CRMC/CWA SAP contains information on sampling protocols and equipment. Table 4-7 summarizes this information. pH Field Meter In situ None Immediately Field Temperature Field Meter In situ None Immediately Field Specific Conductance Field Meter In situ None Immediately Field Chlorophyll a Field Meter In situ None Immediately Field Oxidation Reduction Potential Field Meter In situ None Immediately Field Dissolved Oxygen Field Meter In situ None Immediately Field Secchi Depth Secchi Disc In situ None Immediately Field Alkalinity ▇▇▇▇▇▇▇ Sampler 100 ml poly 4o±2°C 14 days 2320 B SM20 Carbonaceous Biochemical Oxygen Demand ▇▇▇▇▇▇▇ Sampler 1000 ml poly 4o±2°C 48 hours SM5210 B Suspended Solids, Total ▇▇▇▇▇▇▇ Sampler 1000 ml poly 4o±2°C 7 days SM2540 D, 160.2 EPA Dissolved Solids, Total ▇▇▇▇▇▇▇ Sampler 1000 ml poly 4o±2°C 7 days SM2540 C E. coli Container immersion 250 ml sterile 4o±2°C 6 hours 9223 B SM20 Organic Carbon, Dissolved ▇▇▇▇▇▇▇ Sampler 250 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days SM5310 C Organic Carbon, Total ▇▇▇▇▇▇▇ Sampler 250 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days SM5310 C Phosphorus, Total ▇▇▇▇▇▇▇ Sampler 250 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days QC 10-115-01-4-B, EPA 365.1 Phosphorus, Ortho ▇▇▇▇▇▇▇ Sampler 500 ml poly 4o±2°C 48 hours QC 10-115-01-1-T, EPA 365.1 Phosphorus, Dissolved ▇▇▇▇▇▇▇ Sampler 250 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days QC 10-115-01-4-B Nitrite+Nitrate – Nitrogen ▇▇▇▇▇▇▇ Sampler 500 ml poly 4o±2°C 48 hours QC 10-107-04-1-C, 4500-NO3 F SM20 Constituent Sampling Equipment Sample Container Sample Preservative Hold Time Analytical Method Ammonia – Nitrogen ▇▇▇▇▇▇▇ Sampler 250 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days QC 10-107-06-2-A, 4500-NH3 G SM20 Kjeldahl Nitrogen, Total ▇▇▇▇▇▇▇ Sampler 500 ▇▇ ▇▇▇▇▇ H2SO4 4o±2°C 28 days 4500 Norg B Sulfate ▇▇▇▇▇▇▇ Sampler 250 ml poly 4o±2°C 28 days EPA 375.4 Chlorophyll a ▇▇▇▇▇▇▇ Sampler 1 L amber 4o±2°C 24 hours APHA 10200 H (Modified) Phytoplankton ▇▇▇▇▇▇▇ Sampler 60 ml ▇▇▇▇▇ ▇▇▇▇▇’▇ 4o±2°C 28 days HPMA (▇▇▇▇▇▇▇▇ 1987) Zooplankton Plankton net 250 ml amber Iso-alcohol 4o±2°C 28 days APHA 10200 G Hardness, Total (calculated) ▇▇▇▇▇▇▇ Sampler 250 ml poly HNO3 4o±2°C 180 days SM2340B Cadmium, Dissolved and Total ▇▇▇▇▇▇▇ Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Copper, Dissolved and Total ▇▇▇▇▇▇▇ Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Lead, Dissolved and Total ▇▇▇▇▇▇▇ Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Mercury, Total ▇▇▇▇▇▇▇ Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Selenium, Dissolved and ...
Sample Handling and Custody Requirements. 20 Accountability for a sample begins when a sample is taken from its natural environment.
Sample Handling and Custody Requirements. Sample containers will be labeled at the time of collection. Labels will include the sample number, location, date, time and the field sampler’s initials. A Field Log will be completed during the collection of each sample. Field Log entries will include the following information: • Sample • Sampler's name(s) • Date and time of sample collection • Preliminary sample descriptions • Weather conditions at time of sampling. As conditions in the field may vary, it may become necessary to implement minor modifications to the sampling plan. Any variances will be recorded in a bound field notebook. A Chain-of-Custody form will be completed for each group of samples collected on the same day, and be used to transfer samples to laboratory personnel. Chain-of-Custody entries will include the project name, field samplers, sample numbers, sample types, number of containers, comments and signatures relinquishing the samples. Field documentation will be completed using indelible ink, with any corrections made by drawing a single line through the error and entering the correct value. Water samples will be placed in coolers with ice or ice-equivalent immediately and chilled to 4 °C or less, but not freezing. Preservatives for total mercury and methylmercury, will be added to the appropriate sample bottles by the laboratory prior to sample collection. Any such bottles will be labeled with the parameter name and the specific preservative added (e.g., H2SO4). Fish tissue samples do not need to be chemically preserved in the field, but will be frozen.
Sample Handling and Custody Requirements