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GROUNDWATER CONTOUR MAP AND GRADIENT <br /> A groundwater contour map was prepared for September 14, 1995 from the data listed in Table <br /> 1 (see 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 a calculated <br /> gradient of 0 002 <br /> DISCUSSION <br /> Concentrations of TPHG were observed in well MW-1 BTEX components were also observed in <br /> well MW-1 <br /> MONITORING SCHEDULE <br /> The continuation of the quarterly groundwater monitoring program is recommended for this site <br /> and is scheduled for December, 1995 <br /> LIMITATIONS <br /> This quarterly sampling and report was performed using recommended current guidance <br /> documents of the state of California Regional Water Quality Control Board The statements, <br /> conclusions, and recommendations are based on present site conditions Conditional changes may <br /> occur through time by natural or manmade processes on this or adjacent properties Future <br /> review and interpretations should consider regulatory changes that any have been enacted <br /> subsequent to preparation of this report Wright Environmental Services, Inc is not <br /> responsible for laboratory errors, and no warranty or guarantee is implied therein <br /> If you have any questions concerning this report, please call our Tracy office at (209) 833- <br /> 0758 <br /> Sincerely, <br /> Wright Environmental Services, Inc <br /> L L Vvter-- OAAi-lq�, A <br /> Lester Messina Christopher M Palmer t`'ya*R M <br /> Project Manager C E G 1262 <br /> t N° 1262 .� <br /> OMWIED <br /> Attachments: Figure 1 Site Map,Groundwater Elevation, Contour Map ENGINEERING <br /> A Groundwater Sampling Information Sheets GEOLOGIST <br /> B Chemical Analytical Date and Chain-of-Custody Forms <br /> OF IbA <br />• cc' San Joaquin County PHS-EHD, ATTN Steven Sasson <br /> Regional Water Quality Control Board, ATTN Ms Elizabeth Thayer <br />