General InfoInvestigator Name(s): Daryl Kuhn's 7-8 Science ClassCollection Date & Time: Wednesday, May 29, 2013 - 9:15amPresent: Steady RainSchool: Edmunds Middle SchoolWatershed: Lake Champlain Direct & Grand Isle BasinsRiver: Potash Brook (Lake Champlain Direct Flow)Monitoring Site: Potash Brook Champlain Water DistrictLatitude: 44.444627Longitude: -73.214339 Physical AssessmentWater Appearance: MuddySurrounding Development or Land Use: ResidentialIs there a water treatment plant upstream?: NoAppox. Channel Width: 22.00ftAvg. Depth: 1.50ftCurrent Velocity: 0.45ft/secOverhead CanopyCanopy Cover: 25% Biotic AssessmentPT Group 1 (Intolerant)Enter the number of each observedStonefly Nymph: 3Mayfly Nymph: 0Caddis Fly Larvae: 9Dobsonfly Larvae: 0Riffle Beetle: 0Water Penny: 3Right-Handed Snail: 2PT Group 2 (Moderately Intolerant)Enter the number of each observedDamselfly Nymph: 0Dragonfly Nymph: 2Sowbug: 0Scud: 0Cranefly Larvae: 0Clams/Mussels: 0Crayfish: 2PT Group 3 (Fairly Tolerant)Enter the number of each observedMidges: 0Black Fly Larvae: 0Planaria: 0Leech: 0PT Group 4 (Very Tolerant)Enter the number of each observedLeft-Handed Snail: 0Aquatic Worms: 3Blood Midge: 0Rat-Tailed Maggot: 0Pollution Tolerance Index Rating= 4*(Total # in PT Group 1) + 3*(Total # in PT Group 2) + 2*(Total # in PT Group 3) + 1*(Total # in PT Group 4) 23+ (Excellent) 17-22 (Good) 11-16 (Fair) 10 > (Poor) PT Index Rating: 23.0