The Environmental

Agent

Daisy Maddison

My principal aims within this project are to provide information concerning the work of the Environment Agency in their bid to protect and improve the environment. This is an educational leaflet providing further information about the tests that the Environment Agency carry out on water sources around the UK. All information with in this booklet is accurate and was obtained whilst with a genuine Agent of the Environment.

The Environmental

Agent

Flooding is possible

Typical range

Current level

1.26

1.01

0.75

0.50

0.25

0.0006:00

09:00

12:00

15:00

18:00

21:00

00:00

03:00

06:00

09:00

12:00

15:00

18:00

21:00

00:00

03:00

01/01/2013 02/01/2013 03/01/2013

Time

Highest Recent

Current

1.26

1.01

0.75

0.50

0.25

0.00

Typical Range Flooding Possible

Leve

l in

met

res

Washford River at Beggearn Huish

The river level at Beggearn Huish is 0.6 metres. This measurement was recorded at 04:00 on 03/01/2013. The typical river level range for this location is between 0.15 metres and 0.80 metres.The highest river level recorded at this location is 1.05 metres and the river reached 1.04 metres on 30/04/2012

Highest recent Highest recorded

NH4 Testing

0 0.5 1 2 3 5 7 10 0 0.4 0.8 1.6 2.3 3.9 5.4 7.8

mg/l NH4+mg/l NH4-N

Colorimetric determination with colour sliding card and sliding comparator.Ammonium nitrogen (NH4-N) occurs partly in the form of ammonium ions and partly as ammonia. A pH dependent equilibrium exists between two forms. Ammonia ions react with Neßler’s reagent to form a yellow-brown compound. The ammonia concentration is measured semiquanititively by visual comparison of the measurement solution with the colour fields of a colour card.

1. To take readings, insert the probe into the sample. Move the probe in the sample to release any air bubbles and to provide a fresh sample to the sensor cap. This movement is only necessary when first inserting the probe into the sample. Since the ProODO utilizes optical luminescent technology, continuous sample movement or stirring is not required. The probe will fit into a 300 mL BOD bottle for taking initial and final BOD readings. For best results in a BOD bottle, a stirring device should be used to properly mix the sample and to keep solids from settling at the bottom.2. Allow the temperature readings to stabilize and wait approximately 25-35 seconds for the DO readings to stabilize.3. Log One Sample is already highlighted in Run mode. Press Enter to open a submenu. Highlight Sites or Folders and press Enter to select the site or folder to log the sample to.4. If necessary, use the keypad to create a new Site or Folder name. If Site List and Folder List are disabled in the System menu, you will not see these options when logging a sample.5. Once the Site and/or Folder name is selected, highlight Log Now and press Enter. The instrument will confirm that the data point was successfully logged.

Oxygen Metering

Bromine, Total, LR

Sampling and StorageAnalyze samples immediately. Do not collect samples in plastic containers.

Standard Additions Method1. Snap the neck off a low range Chlorine Standard Solution PourRite® Ampule, 20–30 mg/L Cl2.

2. Use a TenSette® pipet to add 0.1, 0.2, and 0.3 mL of standard to three 10-mL samples. Swirl gently to mix. (For AccuVac Ampules, use 0.3, 0.6, and 0.9 mL of standard and a 30-mL sample in a 50-mL beaker.)

3. Analyze each sample as described in the procedure. Each 0.1 mL of standard will cause an incremental increase in the apparent bromine concentration. The exact value depends on the concentration of the ampule standard. Check the certificate enclosed with the standard ampules for the chlorine concentration. Multiply the expected chlorine concentration by 2.25 to determine the expected increase in bromine concentration.

Indicator Strips pH 0 - 14 non-bleeding

Dip in-read while still moist. With weakly-buffered solutions, immerse until there is no further colour change (1 - 10 min).

With highly coloured samples, rinse strip briefly with clean water before reading.

0 1 2 3 4 5 6 7

7 8 9 10 11 12 13 14