Laserfiche WebLink
Because of the complex interaction of the two groundwater zones and the interconnecting <br /> "cross zone" wells a number of test will be preformed <br /> EXCAVATION DEWATERING <br /> To test the possibility of dewatering the A-Zone ui the former UST area, a step draw <br /> down test will be performed in RW i A <br /> A step draw down test will be performed in MWI, to test the possibility of dewatering <br /> the area next to the former UST excavated area into the top of the B-Zone. <br /> STEP DRAWDOWN TEST RW1A <br /> In order to get some idea of the practicality of dewatering the A-zone sand a step <br /> drawdown test will be performed in RW1A The test will be performed by placing a <br /> variable speed Grunfose pump in RW I A. The water will be pumped through carbon to <br /> the sanitary sewer under variance from the Stockton sewer district. This test will be <br /> carried out for a period of eight hours. During the test, the pump rate will be increased m <br /> steps, starting at one gallon per minute As the drawdown in the well reaches <br /> equilibrium, the pump rate wdl be increased in one gallon per minute increments <br /> Down hole pressure transducers will be used to collect drawdown infor-oration from <br /> MW6A, MW6B, RW1A, RWIB and MW 1 Depth to water in the other Surrounding <br /> wells will be measured periodically with the depth to water meter and recorded to 0 01 <br /> foot accuracy The results of the test will be evaluated by developing both distance <br /> drawdown and drawdown over time graphs for the wells. <br /> STEP DRAWDOWN TEST MWI <br /> In order to get some idea of the practicality of dewatering both A and B Zones a Step <br /> Drawdown test will be performed in MWI The test will be performed by placing a <br /> variable speed Grunfose pump m MWI The water will be pumped through carbon to <br /> the sanitary sewer under variance from the Stockton sewer district This test will be <br /> carried out for a period of eight hours. During the test, the pump rate will be increased in <br /> steps, starting at one gallon per rmnute As the drawdown in the well reaches <br /> equilibrium, the pump rate will be increased in one gallon per minute increments. <br /> Down hole pressure transducers will be used to collect drawdown information from <br /> MW6A, MW6B, RWIA, RWIB and MW I Depth to water in the other surrounding <br /> wells will be measured periodically with the depth to water meter and recorded to 0.01 <br /> foot accuracy. The results of the test will be evaluated by developing both distance <br /> drawdown and drawdown over time graphs for the wells <br /> 27 Sanchez 2nd QM 2001 <br />