Task 1. Flanders Road Transfer Station: Water Quality Sampling, Data Analysis, & Reporting • Conduct a total of two rounds of annual groundwater and surface water sampling at the Flanders Road Landfill in accordance with the recommendations of CDM Smith’s report titled “Phase II Hydrogeological Study” dated October 1995. • Measure static water level and depth to bottom of each monitoring well during each sample round. The static water level and depth to well bottom will be measured from top of the inner well casing. • Samples will be collected from the drinking water supply well, WS-1, and four (4) groundwater monitoring wells identified as: CDM-2A, CDM-2B, CDM-3A and CDM-3B. • Samples will be collected from two (2) surface water locations in Fort Hill Brook identified as SW-A and SW-B. Surface water samples will not be collected within 48 hours after a precipitation event. • Subcontract with a state-certified laboratory to perform the laboratory analysis. Groundwater and surface water sample parameters include o Field parameters (pH, temperature, dissolved oxygen, specific conductivity, turbidity and redox potential) o Total Metals (antimony, arsenic, barium, beryllium, cadmium, chromium, copper, iron, lead, manganese, mercury, nickel, selenium, silver, thallium and zinc) o Leachate indicators (alkalinity, chloride, sulfate, nitrate as nitrogen, nitrite as nitrogen, ammonia as nitrogen, total dissolved solids, total suspended solids, chemical oxygen demand, and hardness) o Volatile Organic Compounds (VOCs) by EPA Method 8260C plus MTBE • For quality assurance/quality control (QA/QC) purposes, each sample round will include one duplicate sample, one field blank and one trip blank. The duplicate QA/QC sample will be analyzed for all parameters listed above and the trip blank will be analyzed for VOCs only. • After each sampling event, evaluate the environmental data collected. The data analysis will include a summary letter report including the following: o Tabulations of all environmental sampling data, o Evaluation of groundwater and surface water quality with respect to ▪ Connecticut and EPA Drinking Water Standards Maximum Contaminant Levels (MCLs) ▪ Historical results ▪ Condition of monitoring wells, and ▪ Identification, if possible, of any contamination / leachate plumes. • Submit draft Monitoring Report to Town, incorporate comments, and deliver Final Report to Town. • Prepare and submit CT DEEP Landfill Monitoring Report Transmittal Form with Final Report.
