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ARCHIVED REPORTS XR0006109
EnvironmentalHealth
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COUNTRY CLUB
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1876
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2900 - Site Mitigation Program
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PR0542421
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ARCHIVED REPORTS XR0006109
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Last modified
6/21/2019 12:55:13 PM
Creation date
6/21/2019 10:35:52 AM
Metadata
Fields
Template:
EHD - Public
ProgramCode
2900 - Site Mitigation Program
File Section
ARCHIVED REPORTS
FileName_PostFix
XR0006109
RECORD_ID
PR0542421
PE
2950
FACILITY_ID
FA0024377
FACILITY_NAME
COUNTRY CLUB BLVD/295950
STREET_NUMBER
1876
STREET_NAME
COUNTRY CLUB
STREET_TYPE
BLVD
City
STOCKTON
Zip
95204
APN
12319101
CURRENT_STATUS
01
SITE_LOCATION
1876 COUNTRY CLUB BLVD
P_LOCATION
01
QC Status
Approved
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SJGOV\wng
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EHD - Public
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DOWiihole pressure transducers were used to collect drawdown information from PZ 1 A, PZ 1 B, <br /> PZ2A, PZ2B MW3, RW i A, and RW 1 B Depth to water in the other surrounding wells was <br /> measured periodically with the depth to water meter and recorded <br /> TEST SCHEDULE <br /> I Week prior to start test Place pressure transducers in RW 1 A and RW 1 B and MW3 and <br /> barometric transducer in RW 1 A <br /> 2 Day one, Step drawdown test RW1A performed The well was pumped 3 43 hours, the <br /> formation was then allowed to recover over night <br /> 3 Day two, step drawdown test RW 1 B performed The well was pumped for 5 95 hours, the <br /> formation was then allowed to recover overnight <br /> 4 Day three, constant rate test RW1A Test lasted into day four (24 hours) The formation was <br /> allowed to recover for one day <br /> 5 Day Five, constant rate test RWIB Test lasted into day six (24 hours) Formation allowed <br /> recover for one day <br /> Results <br /> STEP DRAWDOWN TEST RWIA <br /> The step drawdown test in RWIA indicated that the well had to be pumped at less than 1 gpm in <br /> order to perform a constant drawdown test At a rate faster than this the well was quickly drawn <br /> down below the intake of the pump <br /> STEP DRAWDOWN TEST RWIB <br /> During the test the pump rate was increased from 0 8 gpm to 5 0 gpm At 5 gpm the well was <br /> drawn down a total 4 72 feet From the results of the test, it was determined that the optimal <br /> pumping rate for RW 1 B during the constant rate test should be approximately 4 gpm <br /> CONSTANT RATE PUMP TEST RW1A <br /> RW I was pumped at a rate of 0 725 gpm The most striking thing seen during the test was that <br /> drawdowns occurred both in the upper sand and the lower sand The pumping well was quickly <br /> drawn down 4 25 feet were it reached equilibrium The drawdowns seen in the observations wells <br /> were so strongly influenced by leakage between the two aquifers that only the early data from the <br /> pumping well could be used to produce an estimate of the Transriussivity (T) of the upper aquifer <br /> Using the Cooper and Jacob straight-line method the T was calculated to be 28 ftZ/day At RW1A <br /> the upper sand is approximately 5 5 feet thick so the resulting Hydraulic Conductivity is 5 1 May <br /> (28ft /day/5 5ft) This value is only an estimate because of the presence of cross-aquifer leakage <br /> 4 <br /> Pump Test 1/20-27103 <br />
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