Laserfiche WebLink
John P. Cummings & Associates <br /> Environmental Consultants <br /> Ph. (510) 505-0722 P.O. Box 2847 <br /> Fax (510) 791.3306 Fremont, CA 94536-2847 <br /> File No. 0293015.00 ;-- <br /> February 24, 1994 _ <br /> Peter Wallace <br /> 19431 N. DeVries Road <br /> Lodi, CA 95240 —Y <br /> Re: February Gradient Calculation <br /> 348 West Harding Way <br /> Stockton, CA o <br /> Dear Mr. Wallace: <br /> John P. Cummings & Associates (JPCA) is pleased to present this <br /> report on the revised gradient calculated by the depth to <br /> groundwater measurement data just collected for the Hess-Dubois <br /> site. The site is located at 348 West Harding Way, Stockton, CA. <br /> This work was required by the San Joaquin County Public Health <br /> Services, Environmental Health Division (SJPHS-EHD) . <br /> FIELD WORK <br /> On February 22, 1994, John P. Cummings of JPCA measured the depth <br /> to groundwater in the three wells at the Hess-Dubois site. He met <br /> Michael Infurna, an inspector with the SJPHS-EHD, at the subject <br /> site. The groundwater depth measurements were taken utilizing an <br /> electronic probe measured from a mark located on the top of the <br /> casing. The groundwater gradient data are presented in Table 1. <br /> The corrected gradient is north-northwesterly at 0.020 ft/ft. The <br /> corrected groundwater gradient is depicted in Figure 1. <br /> TABLE 1 <br /> GROUNDWATER DWATER G'RADI E._wm. DAT., <br /> (Elevations Measured on January 18, 1994) <br /> Casing Water W�bw Srfaoe <br /> Well I.D. Elevation Depth_ Elevation <br /> MW 1 10* 42 . 10 -32 . 10 <br /> MW 2 10.63 42 . 17 -31. 54 <br /> MW 3 10. 04 42 . 22 -32 . 18 <br /> Measurements are in feet. <br /> * The top of the casing for MW-1 was arbitrarily set at 10. 00 feet. <br /> 1 � <br />