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• <br /> 4 Based on data obtained to date, the groundwater plume that <br /> exists beneath the Canteen site has migrated offsite to the <br /> south/southeast toward MW-1 on the U.S . Chemical property This <br /> is consistent with gradient data obtained from both sites <br /> 5 The divergent hydraulic gradient data obtained during prior <br /> samplings on the U S Chemical property may be due to the very <br /> flat gradient that is evident from the latest work <br /> RECOMMENDATION <br /> An analysis of the latest work supports the previous data <br /> obtained on the Canteen site, which shows a consistent gradient <br /> to the south/southeast . Therefore, the following recommendations <br /> are made <br /> I Obtain water samples from monitoring wells #z & #2 on the <br /> U S Chemical site and analyze for BTEX & TPH-G If the results <br /> show no evidence of those compounds, the wells can be destroyed <br /> 2 If BTEX or TPH-G are detected in either or both of those <br /> • wells, they should be kept active for further monitoring <br /> activity <br /> 3 Depending upon the results of the water sampling, additional <br /> soil/groundwater investigative work should be performed to <br /> delineate the lateral extent of the groundwater plume workplans <br /> for future investigation & remediation will depend on the results <br /> of the proposed water sampling. <br /> If you have any questions concerning this brief report, please <br /> give me a call <br /> Sincere y, <br /> Wm J er & Associates <br /> cc r an Stevens <br /> chael Infurna, SJCo EHD <br /> Thomas Miazaga <br /> Harding Lawson Associates <br />