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(:VVATC <br /> • A S S O C I A T E S I N C <br /> • Discontinue analyzing groundwater samples for TPHd <br /> • ATC recommends attempting to repair the well MWS by chiseling out 6-inches of grout to <br /> expose the intact 2-inch well casing It is ATC's opinion that the well can be repaired by <br /> then adding a schedule 40, 2-inch slip couple fitting and new well casing with fresh concrete <br /> and repair the locking standpipe The well should be additionally protected by installing 3 <br /> protective concrete filled, steel bollards extending at least 3 feet bgs and protruding 4-feet <br /> from the surface In addition, all bollards and well standpipes should be painted bright <br /> yellow to enhance visibility <br /> • Perform subsurface investigation to evaluate vertical extent of petroleum impacted soil and <br /> groundwater ATC is preparing a workplan to address this investigation <br /> • Investigate the domestic monitoring well for total depth, screened interval and pump intake <br /> elevation to see if it could be affecting the surface groundwater gradient and direction <br /> Original well installation logs should be requested from the California Department of Water <br /> Resources <br /> Please contact our office at (209) 579-2221 if you have any questions or comments <br /> Respectfully submitted, <br /> ATC Associates Inc <br /> /'A <br /> Mike Luksic <br /> Staff Geologist <br /> Drew Van Allen €. ;• �-.q. ; <br /> Senior Project Manager 4 `r "NIX <br /> It <br /> Je e Hornsey, <br /> CA Registered Civil Engineer No 47410 rr. <br /> cc Mr Raymond Greer <br /> Mr James Barton, RWQCB <br /> S\Env iromenta11252911rcportsl3QR-2003 doc 4 <br />