Lake monitoring bottle guide

Below is a visual guide about what your lake monitoring sampling bottle kit should include and how they should be used.

Note: dependent on our supplier, the 250ml bottle may not be the exact shape.

Level 3 study bottle guide

Order / Sample ID	Bottles	Location	Instructions
1 REG @ 0.5 m		Taken 0.5 m from surface	Lower the water collection device to the depth of 0.5 m and drop the weight to close the ends. Retrieve the water sampler and fill, seal, and label each of the bottles in the photo to the left.
2 REP @ 0.5 m		Taken 0.5 m from surface	Repeat step 1 above or use the remaining water in the water collection device (after filling the regular bottle) to fill your replicate sample. Only one replicate sample is required per lake for each sampling visit.
3 BLF (Blank Sample)		Not applicable	Fill, seal, and label the 250 ml plastic bottle in the photo to the left using DI water while still on the boat.
4  REG @ mid-depth		Taken mid-depth	Lower the water collection device to the mid-level depth for your site and drop the weight to close the ends. Retrieve the water sampler and fill, seal and label the bottles in the image to the left.
5  REG @ bottom		Taken 1 m above bottom	Lower the water collection device to the bottom depth and drop the weight to close the ends. The bottom depth is defined as being either 1 m above the measured lake bottom at sites 50 m or less in depth, or 50 m at sites greater than 50 m in depth. Retrieve the water sampler and fill, seal and label the bottles in the image to the left.
			REG = Regular sample. REP = Replicate sample. BLF = Blank sample

For each regular sample, record any water odour or colour observations on the field sheet.

• Odour: smell water in sampler for odour. Example descriptors: nil (no odour), organic, sulphur (rotten eggs), metallic, etc.
• Water colour: observe water colour in sampler preferably against a white backdrop. Example descriptors: clear, green, brown, cloudy, etc.

Download the bottle guide (PDF)