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DISCUSSION: <br /> TPHg was reported in six of the nineteen wells Sampled this quarter at concentrations ranging from 64 4 ppb (E-11) <br /> to 6,830 ppb(E-10) Benzene was reported in five of the nineteen wells sampled this quarter at concentrations <br /> ranging from 0 865 ppb (E-1 1)to 1,770 ppb (E-10) MtBE was detected in six of the nineteen wells sampled this <br /> quarter at concentrations ranging from 2 61 ppb(E-8) to 19,600 ppb(E-10) Groundwater elevations across the <br /> site increased by an average of 1 99 feet this quarter The groundwater flow direction was primarily toward the <br /> northeast at a gradient of 0 002 ft/ft Attachment A contains SVE/AS system operational data <br /> This report presents our understanding of existing conditions at the subject site The conclusions contained herein <br /> are based on the analytical results and professional judgment, which are in accordance with current standards of <br /> professional practice, no other warranty is expressed or implied SECOR assumes no responsibility for exploratory <br /> borings or data reported by other consultants or contractors <br /> ATTACHMENTS: <br /> • Table 1 -Groundwater Elevation and Analytical Data <br /> • Table 2 -Historical Groundwater Oxygenate Analytical Data <br /> • Table 3 -Historical Groundwater Gradient Data <br /> • Figure 1 -Groundwater Elevation Contour Map <br /> • Figure 2-Groundwater Chemical Results <br /> • Attachment A-Remedial System Performance Evaluation <br /> • Attachment B -Field and Laboratory Procedures <br /> • Attachment C—Certified Laboratory Analytical Reports,Chain-of-Custody Documentation,and Field <br /> Data Sheets <br /> cc Mr Bob Cochran,Chevron Products Company <br /> Ms Lon Duncan,San Joaquin County Health Department <br /> Mr Marty Hartzell,California Regional Water Quality Control Board-CVR <br />