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455 Grant Line Road, Tracy, California October 27, 1993 <br /> The Southland Corporation Page 3 <br /> magnitude as previous results. Tables 1 summarizes the analytical results of this sampling event <br /> and the historical analytical data. The laboratory analytical reports and the chain-of-custody records <br /> ' for the September 10, 1993 sampling event are included in Attachment 3, <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The potentiometric surface elevation as measured in theroundw t <br /> g a er monitoring wells decreased an <br /> ' average of 1.0 foot since the previous quarter monitoring event. <br /> Based on the groundwater monitoring and analytical data collected to date, Groundwater <br /> ' Technology recommends that quarterly monitoring continue during 1993. A permit application to <br /> discharge treated groundwater to surface waters was submitted to the California Regional Water <br /> Quality Control Board. A treatment system construction design package was submitted to the City <br /> of Tracy Community Development Department for a building permit. Installation of a groundwater <br /> extraction system will commence upon approval of these permits. <br /> ' Please contact Groundwater Technology's West Sacramento Office If you have any questions or <br /> comments regarding this report. <br /> MSincerely, <br /> Groundwater Technology, Inc. Groundwater Technology, Inc. <br /> Written/Submitted by Reviewed/Approved By <br /> s <br /> ' SAILAJA K. Y LAMANCHILJ BRUCE :H EPPLER <br /> Associate Engineer Environmental Geologist <br /> Project Manager <br /> ' E.K SIMONIS, R.G. <br /> Senor Environm ologist <br /> zflERED GEQ. <br /> SKY/BHE/EKS:rz GN S t D)k moo✓ <br /> P � <br /> Attachment 1 Well Survey Data <br /> ' Attachment 2 Field Data Sheets <br /> Attachment 3 Laboratory Report of Analytical Results ,�,JcoNa.4422 <br /> 30TR93.RPr * -7 6-30'54 <br /> CAM�0 <br /> GROUNDWATER <br /> ' TECHNOLOGY <br />