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Table 10CDCR-EW-4 Combined Shallow/Intermediate Water-Bearing Zone Parameter Results Well Installation and Interim Remedial Action ReportCalifornia Department of Corrections and RehabilitationStockton, CaliforniaTest Pumped WellTest Type Well IDDistance from Pumping Well (ft)Well Screened IntervalPumping Test Rate(s)(gpm)Specific Capacity (gal/ft drawdown)Well Sustainable Yield (gpm)Drawdown Radius of Influence (ft)Saturated Thickness (ft)aAquifer Type per MethodSolution Used for AnalysisTransmissivity (ft2/day)Hydraulic Conductivity (ft/day)Hydraulic Conductivity (cm/s)Storativity Step CDCR-EW-4 0 Intermediate 7.5 / 13 /15 /17 / 23 0.5 - 0.9 15-20 -- 30 UnconfinedTheis (Step Test)b264 9 3.1E-03 2.7E-08UnconfinedTheisc 192 6 2.3E-03 1.2E-03UnconfinedCooper-Jacobd136 5 1.6E-03 1.5E-04Leaky Hantushe93 3 1.1E-03 4.1E-04UnconfinedTheisc 7,993 266 9.4E-02 4.8E-03UnconfinedCooper-Jacobd8,924 297 1.0E-01 1.7E-01Leaky Hantushe8,339 278 9.8E-02 4.6E-03UnconfinedTheisc 10,008 334 1.2E-01 3.7E-02UnconfinedCooper-Jacobd5,311 177 6.2E-02 1.9E-03Leaky Hantushe4,456 149 5.2E-02 2.7E-03Average All Data 4,572 152 5.4E-02 2.2E-02Average CRT MWs 7,505 250 5.4E-02 3.7E-02Notes:a The saturated thickness has been interpreted as equivalent to the permeable thickness for the purpose of calculation of the hydraulic conductivity.b Theis (1935) step-drawdown test - type curve solution for a step-drawdown test in an confined aquifer with variable rate and well losses.c Theis (1935) - type curve solution for a pumping test in an unconfined aquifer with variable rate and partial penetration. Jacob's correction for partial dewatering of aquifer applied to displacement data.d Cooper-Jacob (1946) - straight line solution for a pumping test in a unconfined aquifer with variable rate.e Hantush (1960) with aquitard storage - type curve solution for a pumping/recovery test in a leaky confined aquifer with storage in the aquitard(s) with variable rate.Acronyms and Abbreviations: > = greater than ft/day = feet per day< = less thanft2/day = square feet per day-- = not applicable gal/ft drawdown = gallon per foot of drawdownCDCR = California Department of Corrections and Rehabilitation gpm = gallon per minutecm/s = centimeter per second ID = identificationCRT = constant rate test MW = monitoring wellft = feetReferences:Cooper, H.H. and C.E. Jacob, 1946. A generalized graphical method for evaluating formation constants and summarizing well field history, Am. Geophys. Union Trans., vol. 27, pp. 526-534.Hantush, M.S., 1960. Modification of the theory of leaky aquifers, Jour. of Geophys. Res., vol. 65, no. 11, pp. 3713-3725.Theis, C.V., 1935. The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using groundwater storage, Am. Geophys. Union Trans., vol. 16, pp. 519-524.CDCR-EW-4Intermediate Constant Rate30CDCR-EW-4AMW-58SAMW-58M21110 VariableShallow >10 and <430CDCR-EW-4 pumped at 16.5-- --Page 1 of 1