Sam Ziemann From - Region of Waterloo

HYDROGEOLOGICAL ASSESSMENTSTRANGE STREET WATER SUPPLY CLASS EA UPDATEREGIONAL MUNICIPALITY OF WATERLOOResults for Test WellMarch 19, 2012The following presents a detailed interpretation of the aquifer response:Pumping Well Response• Prior to the start of the performance testing a static water level of 336.6 m AMSL(8.70 m BGS) was observed at K-SS-TW1-11;• As shown in Figure 8, a rapid drawdown was observed with each increase in pumping rateassociated with the variable rate pumping test. Within the first 10 minutes of the constantrate pumping test a drawdown of 4.1 m was observed. The water level remained relativelystable throughout the remainder of the pumping test with a maximum drawdown of 4.3 mobserved at the end of the test. As shown in Figure 8, water levels remained relativelystable for the remaining 12 hours of the pumping test indicating steady-state conditions; and• Following shutdown on June 14, 2011 at 14:20, water levels at K-SS-TW1-11 recovered93% (3.99 m) after 1 minute of pump shutdown. Monitoring was completed 30 minutes afterpump shutdown when 95% recovery in the pumped well was observed.Aquifer 1 (AFB1/AFB2) Response• An immediate and clear response to pumping was observed at Monitoring WellsK-SS-OW1B/C-11 located adjacent to the pumped well. At K-SS-OW1B-11 andK-SS-OW1C-11, drawdowns of 0.74 m and 0.44 m were observed, respectively, by the endof the pumping test. Water level declines of about 0.01 m/hr were observed at the end ofthe pumping test indicating near steady-state conditions were reached;• Monitoring Well K-SS-OW1-82 is located 600 m east of K-SS-TW1-11. There was no clearresponse to pumping observed at K-SS-OW1-82;• Monitoring Well STOW2-07 is located approximately 500 m northwest of K-SS-TW1-11.There was no clear response to pumping observed at this well;• Production Well K13 is located approximately 450 m west of K-SS-TW1-11. There was noclear response to pumping at this well;• Monitoring Well K-SS13-99 is located 400 m east of K-SS-TW1-11, in the northeast cornerof Gzowski Park. The logger installed in K-SS13-99 malfunctioned during the pumping test.There was no clear response to pumping observed at K-SS13-99 based on the four manualwater level measurements obtained from the monitoring well during the pumping test; and• Following pump shutdown, 80% recovery was observed within 2.5 days and 4.25 days atK-SS-OW1B-11 and K-SS-OW1C-11, respectively. Monitoring was discontinued 5.8 days4.6 hls v:\01609\active\161110897_strange_st\planning\report\final hydrogeo assessment\final\fnl_rpt_120319.docx