Sam Ziemann From - Region of Waterloo

July 23, 2010Lisa Lachuta, P.Eng.Page 6 of 7Reference: Technical Memorandum A1 –Strange Street Well Field Water Quality Assessment• Phenolics, styrene, trichloroethylene, 1,1,1-Trichloroethane and 1,1-Dichloroethanewere historically detected at Production Wells K12 and K17, located on the easternedge of the well fieldBased on the 2010 water quality samples collected from monitoring wells throughoutthe Strange Street Well Field, and considering that most detections of organiccompounds have been found from the eastern portion of the well field from formerProduction Wells K12 and K17, VOCs are not considered to be a concern to waterquality at the Strange Street Well Field, and is not considered to be a problem in any ofthe proposed test drilling locations.IMPLICATIONS OF WATER QUALITY ON TEST DRILLING LOCATIONSFollowing the review of water quality parameters throughout the aquifer, the waterquality was assessed with respect to each previously identified potential test drillinglocation (Stantec, 2010). These test drilling locations are indicated on Figure 1. Thesepotential drilling locations are:• TW1 – Knell Drive between K11A and K13 (owned by the Regional Municipality ofWaterloo);• TW3 – Gzowski Park (owned by the City of Kitchener); and• TW4 – Driving Range at the Westmount Golf and Country Club.TW1 – KNELL DRIVEGiven the proximity of the potential test drilling location at Knell Drive to currentProduction Wells K11/K11A and K13, it is expected that groundwater at this locationwould be similar in composition to Production Wells K11/K11A and K13, with the onlypotential water quality concerns being elevated iron and manganese, which would betreatable with the proposed water treatment plant. Water samples collected at nearbySS06-99 during the 2010 monitoring program also exhibited low chloride, sodium, iron,manganese, sulphate and was non-detect for nitrate. Therefore, it is not expected thatwater quality would be a concern if a new production well were installed in this locationTW3 – GZOWSKI PARKThe potential drilling location is located in a green space between Production Wells K13and K10A. It is approximately 250 m west of monitoring well SS13-99, and 350 m eastof monitoring well SS01-99, and therefore the water quality at this potential test drillinglocation is anticipated to be reflective of the water quality at these monitoring andproduction wells. In general, west of TW3, the aquifer water quality is interpreted to behigh quality, with low concentrations of chloride and sodium, and generally lowconcentrations of iron and manganese. However, east of TW3, towards SS13-99 andin the vicinity of Production Well K10A, water quality is generally poorer, withcomparable iron and manganese concentrations, but elevated chloride and sodium. Itis unknown whether groundwater in the vicinity of TW3 will be more reflective ofgroundwater to the east or to the west.