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[DOC File]PHOSPHATE IN OUR WATERS - C-MORE
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Rinse the pre-labeled, acid-washed sample bottle three times and fill two-thirds full with filtered sample water. Rinsing the bottles and syringe lowers risk of contamination. Take duplicate samples from each water source if possible. Store samples in a cooler while in the field; analyze immediately upon return to the class or freeze until ...
duplicate samples epa

[DOC File]EPA METHODS 525/625/8270
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*Based on seven replicate analyses, spiked at 2 µg/L in reagent water. The liquid detection limit is based on reagent water samples spiked with a concentration of 2 µg/L of each of the analyte. The detection limit study was performed in accordance with 40CFR Part 136 Appendix B. Detection limit study performed on JUNE 2, 1994.
difference between duplicate and replicate

[DOCX File]Equis Lab Standard Operating Procedure
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"Lab" for laboratory QC samples. No other values are allowed. Matrix spikes and lab duplicate/replicate are "Lab" samples, even though the parent is a "Field" and the base sample came from the field. The spiking or splitting for duplication is done in the lab. Field duplicates as submitted to the lab by field sampling teams are “Field”
duplicate versus replicate

[DOC File]REFERENCES
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4.0 Field Replicate: Two independent samples were collected from the same location and as close as possible to the same time in the field. Both samples were submitted to WES laboratory “blind”. In order for this data quality objective to be met, the results must be: 1mg/L
field duplicate sample

[DOC File]QUALITY ASSURANCE MANUAL
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When preparing replicate samples for quality control purposes, prepare the replicate at exactly the same dilutions as the original sample. Using a large-tipped pipet for samples less than 50 mL or a graduated cylinder for larger sample volumes, measure the proper amount of well-mixed sample into thoroughly cleaned and rinsed 300 mL bottles.
replicate vs repeat

[DOC File]1 - United States Environmental Protection Agency | US EPA
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Replicate samples should be taken at reaches that are similar in depth, substrate, composition, and gradient. Be careful to not contaminate one site with the other when disturbing substrate (ie. do not disturb the duplicate site with debris from the first site sampled).
field duplicate sample purpose

[DOC File]STUDY PROFILE - United States Environmental Protection …
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Storage Stability: xx sets of samples were spiked in duplicate at three fortification levels. (Describe - e.g., One set was analysed immediately, one at the length of time the field samples were frozen (X days) and two were stored to be analysed "if necessary").
field blank sample

[DOC File]Appendix 4: Vehicle Use List
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Replicate samples are designed to estimate the spatial and/or temporal in-stream variation affording assessment of the representativeness of a single grab sample or measurement. Spatial replicates are preferred. Procure replicate measurements at least 50 m …
trip blank vs field blank

[DOC File]APPENDIX E
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With limited sample mass available for primary TAL analyses, duplicate or replicate sample protocol may not be viable or feasible (if the team leader determines a duplicate sample is viable, he or she will use the extra bags supplied by the field office). If viable, duplicate samples can be taken for 1 in 10-samples. 8.0 SAFETY PRECAUTIONS
duplicate samples epa

[DOC File]SAMPLING AND ANALYSIS PLAN GUIDANCE AND TEMPLATE
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SAMPLING AND ANALYSIS PLAN. GUIDANCE AND TEMPLATE. VERSION 3, Brownfields Assessment Projects. R9QA/008.1. August 8, 2012. This Sampling and Analysis Plan (SAP) guidance and template is intended to assist organizations in documenting the procedural and analytical requirements for Brownfields Assessment projects involving the collection of water, soil, sediment, or other samples …
difference between duplicate and replicate

Replicate vs duplicate environmental samples