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I <br /> Six-inch Extraction Well EW--1 at Frank's One Stop, 1270 West Yosemite <br /> Avenue, Manteca , San Joaquin County, California. Variable rate <br /> performance test performed August 17 , 2000 between 07 : 15 and 11 : 50 <br /> hours . Depth to static water was 12 . 43 feet below casing top at 07 : 25 <br /> hours on 08/17/00 ( 13 . 02 feet below ground surface) . <br /> The graph below shows controlled nominal flow rates and observed <br /> drawdowns at transient condition times during the test. Projections <br /> based on the polynomial D = BQ + CQP. <br />' Total Available Drawdown 4 0 feet BOTTOM OF WELL <br /> PUMP INTAKE <br /> D : Drawdown feet <br /> 4 a Flow Rate GPM <br /> B,c,P are coefficients 'J <br /> U <br /> For observed data <br /> B O 5886 — <br /> C - O 6632 Obse ed ra d <br /> P 2 2219 I o0 <br /> c -I <br /> O <br /> 0 <br /> L <br /> Q <br /> Q� <br /> U <br /> 9 <br /> 010 <br /> > <br /> V) <br /> 0 <br /> 001 <br /> 2 3 4 5 6 789 2 3 4 5 6 <br /> 01 10 <br /> Flow Rate in gallons {ger minute <br /> ® Step Drawdown Test Data <br /> This test represents aquifer-well system conditions at the time it was conducted and those imposed by the equipment employed Yield is a <br /> function of aquifer characteristics near the well, including storage features both in the well and in the aquifer (e g , dewatering) and <br /> the well design Performance over time is a function of pumping-plant operation features and history screen and filter pack condition <br /> end groundwater/aquifer metrtx geochemistry and geochemioal (end hlogeochemical) reactions to the change in conditions imposed by the well <br /> system All of these factors change through time, therefore, performance will also vary over time <br /> PUMPING PERFORMANCE TEST RESULTS <br /> FIGURE <br /> WELL EW-1 <br /> 2 0 G E 0 1 J p FRANK'S ONE STOP <br /> 2072 WEST YOSEMITE AVENUE <br /> A GROUND WA-ER CONSut TANCY MANTECA, CALIFORNIA <br />