SAMPLE HANDLING AND CUSTODY REQUIREMENTS Sample Clauses

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. ‌ 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 XxxXxxx Sampler 100 ml poly 4o±2°C 14 days 2320 B SM20 Carbonaceous Biochemical Oxygen Demand XxxXxxx Sampler 1000 ml poly 4o±2°C 48 hours SM5210 B Suspended Solids, Total XxxXxxx Sampler 1000 ml poly 4o±2°C 7 days SM2540 D, 160.2 EPA Dissolved Solids, Total XxxXxxx 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 XxxXxxx Sampler 250 xx xxxxx H2SO4 4o±2°C 28 days SM5310 C Organic Carbon, Total XxxXxxx Sampler 250 xx xxxxx H2SO4 4o±2°C 28 days SM5310 C Phosphorus, Total XxxXxxx Sampler 250 xx xxxxx H2SO4 4o±2°C 28 days QC 10-115-01-4-B, EPA 365.1 Phosphorus, Ortho XxxXxxx Sampler 500 ml poly 4o±2°C 48 hours QC 10-115-01-1-T, EPA 365.1 Phosphorus, Dissolved XxxXxxx Sampler 250 xx xxxxx H2SO4 4o±2°C 28 days QC 10-115-01-4-B Nitrite+Nitrate – Nitrogen XxxXxxx 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 XxxXxxx Sampler 250 xx xxxxx H2SO4 4o±2°C 28 days QC 10-107-06-2-A, 4500-NH3 G SM20 Kjeldahl Nitrogen, Total XxxXxxx Sampler 500 xx xxxxx H2SO4 4o±2°C 28 days 4500 Norg B Sulfate XxxXxxx Sampler 250 ml poly 4o±2°C 28 days EPA 375.4 Chlorophyll a XxxXxxx Sampler 1 L amber 4o±2°C 24 hours APHA 10200 H (Modified) Phytoplankton XxxXxxx Sampler 60 ml xxxxx Xxxxx’x 4o±2°C 28 days HPMA (Xxxxxxxx 1987) Zooplankton Plankton net 250 ml amber Iso-alcohol 4o±2°C 28 days APHA 10200 G Hardness, Total (calculated) XxxXxxx Sampler 250 ml poly HNO3 4o±2°C 180 days SM2340B Cadmium, Dissolved and Total XxxXxxx Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Copper, Dissolved and Total XxxXxxx Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Lead, Dissolved and Total XxxXxxx Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Mercury, Total XxxXxxx Sampler 250 ml poly HNO3 4o±2°C 180 days EPA 200.8 Selenium, Dissolved and ...

SAMPLE HANDLING AND CUSTODY REQUIREMENTS