Table 6: Overview of Sample Collection Methods Assessment Type: Quality Parameters NA indicates the category is not applicable for that parameter. In situ indicates the sample is read directly from the water column, a discrete water sample is not collected. Minimum Sample Quantity Container Type(s) Maximum Holding Parameter(s) per Sample Sample Preservation and Preparation Time Depth (unless otherwise noted) transfer to digital format, maintain GPS coordinates in situ 1 / station NA back-up copies of digital data transfer to digital format, maintain station depth in situ 1 / station NA back-up copies of digital data transfer to digital format, maintain sample depth in situ 1 NA back-up copies of digital data multiparameter or single parameter sonde for: 1 / sample + transfer to digital depth a second reading format, maintain temperature in situ for each depth at NA back-up copies of salinity the last station digital data dissolved oxygen of the day turbidity chlorophyll a 1 / sample depth any container is + a second transfer to digital must be sampled acceptable, as long as temperature reading for each format, maintain immediately upon it does not change (thermometer) depth at the last back-up copies of collection of water the temperature of station of the digital data sample the water day if saving for later: opaque or collect 50 mL; read immediately or transparent only a few drops store on ice, warm 60 mL or larger bottle are required salinity (refractometer) to ambient air indefinite (HDPE, HDPC, or note this same sample temperature before – glass), may also be used for analyzing turbidity rinsed 3 with surface water LaMotte Water Sampling Bottle, chemically fix the dissolved oxygen 60 mL, glass 60 mL sample immediately 72 hours (Winkler titration) following collection rinsed 3 times with surface water
Table 6: Overview of Sample Collection Methods Assessment Type: Quality Parameters NA indicates the category is not applicable for that parameter. In situ indicates the sample is read directly from the water column, a discrete water sample is not collected. Parameter(s) Container Type(s) and Preparation Minimum Sample Quantity per Sample Depth (unless otherwise noted) Sample Preservation Maximum Holding Time GPS coordinates in situ 1 / station transfer to digital format, maintain back-up copies of digital data NA station depth in situ 1 / station transfer to digital format, maintain back-up copies of digital data NA sample depth in situ 1 transfer to digital format, maintain back-up copies of digital data NA multiparameter or single parameter sonde for: depth temperature salinity dissolved oxygen turbidity chlorophyll a in situ 1 / sample + a second reading for each depth at the last station of the day transfer to digital format, maintain back-up copies of digital data NA temperature (thermometer) any container is acceptable, as long as it does not change the temperature of the water 1 / sample depth + a second reading for each depth at the last station of the day transfer to digital format, maintain back-up copies of digital data must be sampled immediately upon collection of water sample salinity (refractometer) if saving for later: opaque or transparent 60 mL or larger bottle (HDPE, HDPC, or glass), rinsed 3 with surface water collect 50 mL; only a few drops are required note – this same sample may also be used for turbidity read immediately or store on ice, warm to ambient air temperature before analyzing indefinite dissolved oxygen (Winkler titration) LaMotte Water Sampling Bottle, 60 mL, glass rinsed 3 times with surface water 60 mL chemically fix the sample immediately following collection 72 hours
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