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i <br /> Mr. Clint Rogers 310-325 <br /> October 25, 1991 <br /> Page 2 <br /> SAMPLING AND ANALYTICAL RESUL'T'S <br /> The results of the monitoring and laboratory analyses of the <br /> ground water samples for- this quarter, as well as the results <br /> of previous quarterly monitoring and sampling events, are <br /> summarized in Table 1. Based on the previous wellhead <br /> !+' elevation survey data and depth to water measurements <br /> 71 <br /> collected during this monitoring event, ground water <br /> elevations and the general ground water gradient at this site <br /> are presented in Figure 2. <br /> Ground water was not observed in monitoring wells MW-2 and <br /> ww MW-3 as a result of the receding ground water table in the <br /> general vicinity. Consequently, ground water gradient beneath <br /> the site could not be determined. No liquid-phase <br /> hydrocarbons or sheen were observed in monitoring well MW-1. <br /> The official laboratory reports and chain of custody records <br /> are included in Appendix A. <br /> f• Please call John De George at (510) 682-1582 if you have any <br /> t questions concerning this report. <br /> Sincerely, <br /> kLTON GEOSCI£NCE, <br /> f <br /> John De George <br /> Staff Geologist <br /> bert E. Logan R. G. 5088 <br /> Manager, Concord Operations <br /> wp96155jd <br />