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Monitoring Well Installation Report <br /> Quik Stop Market No 121 <br /> Page 4 <br /> CCI collected information on the municipal well The well is 16 inches 1n diameter and was <br /> drilled to a depth of 360 feet in 1985 The water well drillers' report, obtained from the State of <br /> California, Department of Water Resources, indicates the subsurface lithology consists of <br /> alternating layers of sand and clay to the bottom of the boring The well itself is perforated at <br /> two intervals, the first at 140 to 180 feet and the second at 205 to 265 feet A 2,000-gallon per <br /> minute (gpm) pump is used in the well CCI obtained a monthly production log from the City of <br /> Manteca The log indicates that during the months of May, June and July, 2000, the volume of <br /> water pumped from the well was approximately 24 million, 31 million and 40 million gallons, <br /> respectively <br /> Project Approach <br /> CCI retained PC Exploration of Roseville, California to drill and install the monitoring wells <br /> CCI proposed to install a series of monitoring wells to monitor the groundwater conditions at <br /> selected depth intervals over time CCI installed a total of five wells Two of the wells were <br /> installed to a depth of 25 feet, with a screen interval from 10 to 25 feet, one well was installed to <br /> a depth of 43 feet, with a screen interval from 33 to 43 feet and one well was installed to a depth <br /> of 75 feet, with a screen interval from 65 to 75 feet In addition, one four-inch diameter <br /> extraction well was installed to a depth of 28 feet with a screen interval from 13 to 28 feet <br /> The following scope of work was initiated before and during the well installations <br /> Scope of Work <br /> 1) Secured all appropriate permits from San Joaquin County to perform the field work and <br /> prepared a Health and Safety Plan to conduct field activities at the subject site, <br /> 2) Collected a total of 17 soil samples from the five well locations for laboratory <br /> analysis, <br /> 3) Developed and sampled the five new monitoring wells and collected eight water samples <br /> (including the three existing monitoring wells) for laboratory analysis, <br /> 4) Analyzed all soil and groundwater samples for total petroleum hydrocarbons as gasoline <br /> (TPHg), benzene, toluene, ethylbenzene and total xylenes (BTEX) and fuel oxygenates, <br /> 5) Surveyed the new wells to Mean Sea Level, <br /> 6) Properly disposed of all soil and groundwater drums generated during this field <br /> investigation, <br />