Laserfiche WebLink
Metadata
Document management portal powered by Laserfiche WebLink 9 © 1998-2015 Laserfiche. All rights reserved.
v o <br /> A S S O C I A T E S I N C <br /> TPHg was not detected in the groundwater samples collected from wells MW 1 through MW6 <br /> BTEX were not detected in the groundwater samples collected from wells MW1 through MW7 <br /> The samples from wellsMW5, MW6, and MW7 had concentrations of MTBE at 290 ppb, 2,700 <br /> ppb, and 48,000 ppb, respectively There appear to be correlations between groundwater elevations <br /> and MTBE concentrations in MWS (Figure 4) and MW7 (Figure 5) <br /> Analytical results are summarized in Table 2 Laboratory reports with chain-of-custody documents <br /> are included in Attachment 2 <br /> RECOMMENDATIONS <br /> ATC recommends continued quarterly monitoring and sampling of all site wells (MW1 through <br /> MW7) for TPHg, TPHd, and BTEX by EPA Methods 8015/8021 and fuel oxygenate additives by <br /> EPA method 8260 ATC also recommends evaluation of the vertical extent of impacted <br /> groundwater and will implement the workplan approved by the San Joaquin County Environmental <br /> Health Department upon receipt of approval by the Reclamation District <br /> If you have any questions or comments regarding this project, please contact our office at (209) <br /> 579-2221 <br /> . Respectfully submitted, <br /> ATC Associates Inc <br /> �Q <br /> Nathan Christman <br /> Staff Geologistv. <br /> ';'' <br /> " . w " <br /> jrt! 1 <br /> M.�F • y r+ -'T <br /> Jeanne Homsey, P E <br /> CA Registered Civil Engineer No C47410 ,r <br /> Attachments01' <br /> cc Mr Jim Barton, CRWQCB <br /> James"J "Mills, Westrec Properties <br /> S 1625141quan1y14gr-2003 doc 4 <br />