Physical Parameters AssessmentInvestigator Name(s): Kuhn Edmunds Middle SchoolCollection Date & Time: Friday, April 21, 2017 - 5:45amSchool: Edmunds Middle SchoolWatershed: Winooski BasinRiver: Potash Brook (Lake Champlain Direct Flow)Monitoring Site: Champlain Water District South BurlingtonSite Description: a lot of runoffSurrounding Development or Land Use: ResidentialForestDo you see any pipes entering into the river?: YesIs there a water treatment plant upstream?: YesCanopy Cover: 0-25%Water Appearance: ClearCloudyGreenTea-coloredMuddyFoamyWater Odor: OdorlessAverage Embeddedness: 26-50%Average Velocity: 1.46m/sExact LocationLatitude: 44.45Longitude: -73.22WeatherPresent: OvercastPast 48 Hours: OvercastShowersSteady RainAverage Transparency/Turbidity No Impact: >60 cm - 17cm = 0-50 ntu Possible Impact: 17 - 8cm = 65-150 ntu Impacted: 8 - < 6 cm = >150 ntu Height of Water Column: 31.40cmTurbidity: 16.00NTU Chemical AssessmentAverage Temperature: 10.00°CAverage pH: 7.00Average Orthophosphate PO4-3: 0.10mg/LAverage Dissolved Oxygen: 11.00mg/L Stream Habitat AssessmentStreambed Composition: Mixture of cobbles, gravels, and sand (3)Streambank Stability: Moderately stable banks – some areas of erosion visible (1)Deepest pool is at least: Waist deep (2)Velocity: Fast – quickly takes objects downstream (2)Riparian Vegetation: Mixture of trees, shrubs, and grasses (3)Riparian Vegetative Zone Width: Buffer zone is between 50 and 100 feet (2)Streambed CoverRock ledges: 1Submerged logs, stumps, or tree roots: 1Large rocks: 1Artificial objects: 1Other: 0Stream Habitat Quality ScoreCalculated by adding all of the points from the above fields. 18-22 (Excellent) 11-17 (Good) 6-10 (Fair) 0-5 (Poor)Stream Habitat Quality Score for This Report: 17 Biological AssessmentPT Group 1 (Intolerant)Stonefly Nymph: 0Mayfly Nymph: 1Caddis Fly Larvae: 20Dobsonfly Larvae: 2Riffle Beetle: 21Water Penny: 0Right-Handed Snail: 0# of Taxa: 4PT Group 2 (Moderately Intolerant)Damselfly Nymph: 0Dragonfly Nymph: 1Sowbug: 5Scud: 2Cranefly Larvae: 6Clams/Mussels: 0Crayfish: 0# of Taxa: 4PT Group 3 (Fairly Tolerant)Midges: 10Black Fly Larvae: 0Planaria: 0Leech: 0# of Taxa: 1PT Group 4 (Very Tolerant)Left-Handed Snail: 0Aquatic Worms: 5Blood Midge: 0Rat-Tailed Maggot: 0# of Taxa: 1Pollution Tolerance Index RatingCalculated as follows: 4*(# of Taxa in PT Group 1) + 3*(# of Taxa in PT Group 2) + 2*(# of Taxa in PT Group 3) + 1*(# of Taxa in PT Group 4) 23+ (Excellent) 17-22 (Good) 11-16 (Fair) 0-10 (Poor) PTI Rating for This Report: 31.00