<p> Kennebec Water District – Lab ME00020 DISTRIBUTION SAMPLING LOG & CHAIN OF CUSTODY DATE: ______ANALYST: ______</p><p>Sample Information Chemical Analysis Micro Analysis Sampl Set- Medi P/A Samp Chlorin Residu Analysi Set- P/A Sample e Analysi up a Bottle E- SITE le e al s Date/ Fluorid up Tota ID Date/ C s By NTU pH Phosphate Date/ Lot Lot # Col By Free Total Time e By l Col Time Time # i Control 1 C-1- Spike KWD FinH20- Filtration Pla nt Vassalbor 1- o Post Office 2- ELANCO Libby’s 3- Store Benton Winslow 4- Town Library ME DOT 5- Fairfield Keystone 6- Property Managem ent Waterville 7- City Hall Health 8- First Credit Union Hampton 9- Inn Distance 10- Racing Fairfield Western 11- Avenue Pump Station * Prior to sampling, QC Pocket Colorimeter to DR3800: ______mg/L Pocket Hach : ______mg/L (+/- 10% allowable deviation) Check Western Ave. Chlorine Analyzer & Log. Foxcroft reading: ______mg/L Pocket Hach: ______mg/L Arrival Time:______</p><p>Comments: ______</p><p> evision: May 19, 2016 DIST-HPC SAMPLES KENNEBEC WATER DISTRICT FILTRATION PLANT MONTHLY HPC SAMPLING LOG SAMPLE Sample Sampl Temp. Chlorine Residual Set-up Set-Up Media Filter Pad CFU Verified SITES Date / e By C Free Total NTU pH Fluoride Phosphate Date / By Lot # Lot # Lot # 100/ml Results Time Time Western Ave. Pump Station Freihofer’s Bakery Benton Libby’s Store Crestwood Apt. Maint. Office China Lake TCMF Raw Water China Lake % KILL Raw Water UV Monthly State Sample - CONDP SPCP 1 Sample by Date/Time Cond. uMHOS HTPC/CFU Units pH Cl Total NTU DI/Reagent Water The Conductivity must be < 2 u mhos @ 25c, pH 6.5 – 8.5, HTPC < 500 CFUs, and Total Cl Residual < 0.1 mg/L. LANGLIER INDEX The Langlier index is a ratio of many factors that help to determine the corrosiveness of the water. It reflects the equilibrium of the calcium and alkalinity (as CaCo3) in relation to the pH of the water. If the Langlier index is positive then the water is scale forming and will deposit calcium carbonate and dissolved solids. If the Langlier index is negative then the water is corrosive. If the Langlier index is "zero" then the water is said to be stable. L.I. = pH - pHs 2 Where pHs = A + B - log (ca ) - log (Alky)</p><p>Values of A for temperature Values of B for TDS Values of log Alky or Ca2 Temp. C A mg/L B mg/L Log 10 5 2.27 0 9.63 10 1.00 10 2.20 50 9.72 20 1.30 15 2.12 100 9.75 30 1.48 20 2.05 200 9.80 40 1.60 25 1.98 400 9.86 50 1.70 30 1.91 800 9.94 60 1.78 The Langlier index will be calculated monthly at three representative points. This should provide a representative index of water conditions throughout the KWD.</p><p>Temp TDS COND. Ca2 Log Alky Log Date Location pH C A mg/L MHOS B mg/L Ca2 mg/L Alky pH s L.I. W.A. Station Freihofer Bakery Raw Water</p>