Section_J_-_Datasheet_template.pdf

Fort Belvoir Industrial Stormwater Sampling Datasheet

Outfall: Samplers:

Date: Outfall Arrival Time:

Sample Time:

Field-measured water quality parameters:

pH Temp

°C ɥS/cm ɥmhos/cm

(1 ÷ ɥS/cm)

Temp

°C mg/L

N/A N/A N/A N/A

If collecting dissolved metals, were they filtered? Yes No

Do the bottles you filled match the COC? Yes No

Semi Circle inches width of H2O: Replicate 1 sec Replicate 3 sec

Replicate 2 sec Average sec

Triangle inches width of H2O: 1. Divide volume/avg time:

depth of H2O: 2. Multiply by 0.0864 to get: 0 MGD

Semi Ellipse: inches width of H2O:

depth of H2O: Length: feet

Replicate 1 sec Replicate 3 sec

Trapezoid: inches Replicate 2 sec Average sec top width H2O: Divide length by avg. time to get flow: ft/s bottom width: Compute Flow:

depth of H2O: 1. Find Area in in using info to the left in

2. Divide by 144 to convert to ft ft

Rectangle: inches 3. Multiple by Flow, computed above. ft /s depth of H2O: 4. Multiply by 7.48 to get:

width of H2O: 5. Multiply by 0.0864 MGD concrete asphault grass mud/silt riprap true stream vegetation loose sand

Rain Start Time:

Describe storm pattern (light to heavy, etc.):

pH Probe

All REPs

Specific Conductivity Probe

ONLY REPs 002, 008, 009, 015, 032

Dissolved Oxygen Probe

ONLY REP 002

Time how long to fill the container.

Temp

°C

N/A N/A

Notes:

Estimating Flow: You will complete either the Bucket Method or the Cross Section Method Section of this form.

Timing measurements should be taken three times each!

Cross-Section Timing Bucket Fill

Circle the shape that best describes the channel where you measured flow and measure the water dimensions only.

Give volume/description of the container you filled:

Circle channel material(s): earthen other:

gravel/erodedbramble

Area=π*1/2width /2

Compute Flow:

gallons/sec

Area=1/2width*depth

Cross-Section Timing, continued

Time how long for a ball to move a length of channel.

Area=π*1/2width*depth

Area= 1/2(t. width+b. width)*depth gallons/sec

Area= width*depth