Sample Handling and Custody. This section addresses how samples will be collected, stored, shipped, and disposed of during field investigations. Table 3-1 presents a summary of required sample containers, sample amounts, pre servation, and holding times for widely used methods.
Sample Handling and Custody a. States maximum holding times allowed from sample collection to extraction and/or analysis for each sample type and, for in-situ or continuous monitoring, the maximum time before retrieval of information NA - B1, pg. 18 There are no data collection efforts or site investigations planned by CDM Xxxxx under this QAPP.
Sample Handling and Custody. Sample handling and custody will be accomplished according to SOPs and using standard forms developed by contractor’s laboratories. Sample container selection will be according to appropriate method guidance and/or SOPs. The site-specific work plan will specify sample handling procedures, sample containers, preservation, holding times, chain-of-custody and field documentation, handling of samples in the field, and transport of samples to the laboratory. All analyses will be conducted within the EPA-specified maximum sample holding time limits. Any data obtained from analyses conducted on samples after the specified holding time limit will be qualified by the laboratory in sample result documentation and discussed in the sampling report.
Sample Handling and Custody. 12.1 Sample handling and transport The field sampler is personally responsible for the care and custody of the samples collected until they are transferred or dispatched properly. Samples to be analyzed in the field or by a lab should include the date and time of collection, sample location, sample identification, sampler, and analysis to be performed. When sampling water, collected samples will be kept in an ice chest (4ºC) with ice or ice packs. Volunteers conducting the sample collection and analysis are required to complete field datasheets. These include the following information: time of sample collection; sample ID numbers, including unique IDs for any replicate or blank samples; the results of any field measurements (e.g., temperature, DO, pH, conductivity, turbidity) and the time that measurements were made; qualitative descriptions of relevant water conditions (e.g., color, flow level, clarity) or weather (e.g., wind, rain) at the time of sample collection; and a description of any unusual occurrences associated with the sampling event, particularly those that may affect sample or data quality. Samples will be clearly labeled with an indelible marker and include the site ID, sampling date and time, and parameter to be analyzed for. For macroinvertebrate samples, 95% ethanol should be added to the sample as soon as possible. Eelgrass samples should be stored in a refrigerator or freezer as soon as possible after collection. After returning from the field, all water samples for water quality, stormwater, bacteria or phytoplankton analysis will be analyzed immediately or transferred to the laboratory refrigerator. Upon completion of sample collection, suspended sediment samples should be capped and transported to the sediment lab. Each bottle will be labeled with the date and time of sample collection and then weighed, without the cap, to determine the total sample weight. Bottles have been pre-weighed and the tare weights are stored in the sediment monitoring database. Samples can then be stored either in the refrigerator or in a dark, cool location until they are processed. All water quality, stormwater and bacteria samples are hand delivered to the labs. Macroinvertebrate samples are drained of alcohol, double-bagged and overnight shipped to the lab. Lab personnel immediately refill the samples with alcohol. Contract laboratories will follow sample custody procedures outlined in their QA plans. Contract laboratory QA plans are on file with the re...
Sample Handling and Custody. Parameter Container Volume Initial Preservation Holding Time E. coli, enterococcus, total coliform Sterile, sealed plastic jar purchased from IDEXX Laboratories 120 mL Sodium thiosulfate, cool to 4°C; dark. 6 hour at 4°C, dark. If not possible to analyze within 6 hours, then analyze within 24 hours. Parameter Container Volume Initial Preservation Holding Time Nitrates as N and Orthophosphate as P Plastic jar provided by Creek Environmental Laboratories 250 mL None 48 hour at 4°C, dark. TDS and TSS Plastic bottle provided by Creek Environmental Laboratories 64 oz. None 7 days at 4°C Oil & Grease Xxxxx xxxxx bottle provided by Creek Environmental Laboratories 32 oz. Sulfuric acid preservative 28 days at 4°C Dissolved metals Plastic bottle provided by Creek Environmental Laboratories 8 oz. None 24 hours at 4°C. Filtered within 2 hours of collection Preserved with HNO3 by the lab within 48 hours. Can hold for 6 months after filtered and acidified. Turbidity Plastic bottle provided by Creek Environmental Laboratories 8 oz. None 48 hours at 4°C Total residual chlorine Glass VOA vial provided by Creek Environmental Laboratories 40 mL None Analyze immediately, transport at 6°C in the dark. Ammonia- nitrogen Plastic bottle provided by Creek Environmental Laboratories 8 oz. H2SO4 preservative 28 days, at 6°C in the dark. Benthic invertebrates Widemouth plastic jar 16 oz. 95% ethanol 5 years Eelgrass Plastic bag Various None 7 days, refrigerate or freeze.
