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• GROUNDWAI ER CONTOUR MAP AND GRADIENT <br /> A groundwater contour map was prepared from the date and data listed in Table 1 (see <br /> Figure 1) Groundwater elevation contours were plotted from the measurements and <br /> plotted to a known datum The groundwater flow was in a northerly direction under <br /> a calculated gradient of 0 006 <br /> DISCUSSION <br /> Concentrations of TPHG were observed in well MW-1 BTEX components were also <br /> observed in well MW-1 <br /> MONITORING SC14EDULF <br /> The continuation of the quarterly groundwater monitoring program is recommended <br /> for this site and is scheduled for July, 1995 <br /> LIMITA TIONS <br /> This quarterly sampling and report was performed using recommended current <br /> guidance documents of the state of California Regional Water Quality Control Board <br /> The statements, conclusions, and recommendations are based on present site <br /> conditions Conditional changes may occur through time by natural or manmade <br /> processes on this or adjacent properties Future review and interpretations should <br /> consider regulatory changes that any have been enacted subsequent to preparation <br /> • of this report Wright Environmental Services, Inc is not responsible for laboratory <br /> errors, and no warranty or guarantee is implied therein <br /> If you have any questions concerning this report, please call our Tracy office at <br /> (209) 833-0758 <br /> Sincerely, �,RE D �c�p <br /> Wright Environmental Services, Inc R M, �O <br /> U 61 <br /> N° 1262 -A <br /> FIED <br /> i", ENGINEERING ENGNG <br /> Lester Messina Christopher M Palmer GEOLOGIST <br /> Project Manager C E G 1262 ���TF OF ux\- 13 <br /> Attachments Figure 1 Site Map,Groundwater Elevation, Contour Map <br /> A Groundwater Sampling Information Sheets <br /> B Chemical Analytical Date and Chain-of-Custody Forms <br /> cc San Joaquin County PHS-EHD, Attn Steven Sasson <br /> Regional Water Quality Control Board, Attn Ms Elizabeth Thayer <br /> • <br /> M&M Automotive <br /> April 1995 <br />