Department Of Transport Oiled Shoreline Assessment Form Page 2
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1
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4Shoreline descriptors
Shoreline type
Abbr.
Note
Cliff
Cl
Height & slope
Platform
Pl
Height relative to tide
Reef
Reef is an intertidal platform
Re
Beach
Be
Dune
Du
Flats
Fl
Artificial
A
e.g. wharf, sea wall
Shoreline
Abbr.
Size
Note
substrate
Bedrock or rock
R
Boulder
B
Larger than head
Cobble
C
Fist to head-size
Pebble
Pen diameter to fist size
P
Gravel
G
2-4mm diameter
Sand
S
0.06-2mm diameter
Mud / silt / clay
M
Less than 0.06mm
Mix with water, if it goes cloudy = mud, if it sinks = sand
Earth
E
Usually cliffs only
Shellgrit
Sh
Usually with sand (i.e. Sh/S)
Dead coral, i.e. coral rubble. (If corals are live, record as coral in both substrate type and
Coral
Co
biological character.)
Artificial
A
e.g. Rip-rap
Note: S/B would indicate boulders and sand in equal amounts. S(B) would indicate sand was the dominant substrate.
Biological character
This is flora and fauna living on the shoreline. Document this and indicate location on sketch map.
Oil description/character
• Colour
• Viscosity: Solid (doesn’t flow); Viscous (flows slowly); Fluid (flows easily).
• Stickiness: Very sticky (can’t be wiped / washed off); Sticky (partly removed by wiping / washing); Non sticky
(wipes off easily).
Percentage oil cover
Oil thickness
Name
Abbr.
Thickness
Description
Pooled
Po
Can be measured in mms or cms Pooled fresh or emulsified oil
Cover
Over 1mm
Coverage of oil of measurable thickness but not pooled
Co
Thin coat of oil that masks colour of substrate and can be scratched off with
Coat
Ct
Less than 1mm
fingernail
Stain
St
Less than 1mm
Very thin stain of oil which cannot be scratched off substrate with fingernail
Film or
Fi or
Substrate can usually be seen through oil. Can be described as brown,
Extremely thin film or sheen
sheen
Shn
rainbow or silver
Tar balls
Tb
Variety of sizes
Balls or clumps of weathered oil
• To describe thickness of subsurface oil:
• Depth = distance from substrate surface to top of buried layer
• Thickness of lens = distance between top and bottom of buried layer.
Shoreline Tidal Zones
February 2015
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