Sam Ziemann From - Region of Waterloo

HYDROGEOLOGICAL ASSESSMENTSTRANGE STREET WATER SUPPLY CLASS EA UPDATEREGIONAL MUNICIPALITY OF WATERLOOMethodology for Test WellMarch 19, 2012Following installation, the respective drilling company developed the wells to removefine-grained material from around the screened interval. Well development was completed to asand-free state using hydraulic air lifting, with the water generated during developmentdischarged to an onsite holding tank then pumped to the sanitary sewer accessed through amanhole on Rossford Crescent under permit from the City of Kitchener (Figure 7).All monitoring wells constructed as part of this investigation were completed in accordance withOntario Regulation 903 (O. Reg. 903). Monitoring well installation details are summarized inTable 1 and presented on the borehole logs in Appendix G. A copy of the completed MOEWater Well Records for each monitoring well is included in Appendix G.3.4 TEST WELL INSTALLATIONGerrits constructed a 154 mm OD well (K-SS-TW1-11) adjacent to K-SS-OW1-11. Constructionof Test Well K-SS-TW1-11 using air rotary drilling techniques was completed fromMarch 1, 2011 to March 9, 2011. Stantec field staff observed the test well drilling andinstallation. Test well installation details are summarized in Table 1 and presented on theborehole log in Appendix G. A copy of the completed MOE Water Well Record is included inAppendix G. Details related to the design and construction of K-SS-TW1-11 and welldevelopment are provided in Section 4.3.3.5 GEODETIC SURVEYGround surface and top of casing elevations and spatial coordinates at MonitoringWells K-SS-OW1A/B/C-11, K-SS-OW13-99, and Test Well K-SS-TW-1-11 were measuredusing a total station GPS unit. Following completion, the accuracy of the survey wasdetermined to be ±0.020 m.3.6 PERMIT TO TAKE WATER APPLICATIONOn behalf of the Region, Stantec prepared and submitted an application for a Category 2 PTTWto conduct a 24 hour performance test (step and constant rate test) at Test Well K-SS-TW1-11.The permit commenced on May 1, 2011 and extended until March 31, 2012, allowingcontinuous pumping over a 7-day period, to provide flexibility in the testing schedule and toaccount for any unforeseen delays. The maximum permitted taking per day was 2,592,000 L(1,800 L/min). A copy of PTTW No. 1160-8FQK6S is provided in Appendix H.3.7 PERFORMANCE TESTINGA variable rate pumping test was completed at K-SS-TW1-11 prior to commencing a 24 hourconstant rate pumping test. The performance testing was designed to evaluate aquiferproperties and water supply potential. Both the variable rate and constant rate pumping testswere completed by Gerrits, under the supervision of Stantec staff.hls v:\01609\active\161110897_strange_st\planning\report\final hydrogeo assessment\final\fnl_rpt_120319.docx 3.3