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11 <br /> SIERRA <br /> Table 1 Water Level Data and Well Construction Details - Chevron Service Station #9-6171, 6633 Pacific Avenue, Stockton, <br /> California (continued) <br /> Well Date DTW TOC GWE Product Screen Sand Pack Bentonite/Grout <br /> ID Measured (ft) (ft) (msl) Thickness* Interval Interval Interval <br /> (ft) <----------------feet below grade---------------------------> <br /> MW-4 9/5/90 5525 1301 -4224 0 48 - 68 455 - 68 0 - 455 <br /> 11/29/90 5551 -4250 0 <br /> 3/14/91 5577 -4276 0 <br /> 6/6/91 5563 -4262 0 <br /> ,- 8/29/91 5627 -4326 0 <br /> 12/6/91 5513 -4212 0 <br /> 3/12/92 5385 -4084 0 <br /> 6/11/92 5526 -4225 0 <br /> 9/3/92 5643 -4342 0 <br /> 12/17/92 55.34 -42.33 0 <br /> MW-5 9/5/90 5474 1251 -4223 0 49 - 69 46 - 69 0 - 46 <br /> 11/29/90 5502 -4251 0 <br /> 3/14/91 5525 -4274 0 <br /> 6/6/91 5511 -4260 0 <br /> 8/29/91 5577 -4326 0 <br /> 12/6/91 5458 -4207 0 <br /> 3/12/92 5353 -4102 0 <br /> 6/11/92 5474 -4223 0 <br /> 9/3/92 5591 -4340 0 <br /> 12/17192 5480 -42.29 0 <br /> MW-6 9/3/92 5630 1278 -4352 0 50 - 70 48 - 70 0 - 48 <br /> 12/17/92 5522 -42 44 0 <br /> EXPLANATION NOTES <br /> DTW=Depth to water TOC elevations were surveyed by Ron Miller, Licensed land Surveyor, <br /> TOC =Top of casing elevation CE#15816 on September 5, 1990 <br /> OWE s Ground water elevation <br /> msl=Measurements referenced relative to mean sea level • Product thickness was measured with an MMC flexi-dip interface probe <br /> ---=Not measured/not applicable Monitoring well abandoned on July 31, 1992 <br /> I4604T WL <br />