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j Clayton <br /> ENVIRONMENTAL <br /> CONSULTANTS <br /> Fate of Monitoring Well <br /> Installed for Groundwater Sampling <br /> at � Mvi <br /> 222 North El Dorado Street <br /> in APR g <br /> Stockton, California hNViRdNMENTAL H �"� TII <br /> - RVIC['S <br /> 1.0 INTRODUCTION <br /> American Savings Bank retained Clayton Environmental Consultants, Inc. to install . <br /> and sample a monitoring well at its property located at.222 North"El Dorado Street <br /> in Stockton, California. This work is being done after a Phase I environmental <br /> assessment conducted by Clayton revealed that there was a car repair shop with <br /> documented environmental-problems within 200 feet upgradient to crossgradient of <br /> the subject site. <br /> 2.0 PROCEDURES <br /> The objective of this work will be to determine whether the groundwater beneath { <br /> the site is contaminated with petroleum hydrocarbons that have migrated from the <br /> car repair shop. We will install one groundwater monitoring well to obtain soil <br /> samples and a groundwater sample. <br /> If the laboratory results indicate that the groundwater has been impacted with <br /> hydrocarbons, and they are present above their action levels, more work will be done <br /> to characterize the site-and the well will be left in place. <br /> If the laboratory results show hydrocarbons at low levels and below action levels, the <br /> well will be left in place for groundwater monitoring until it is no longer deemed <br /> necessary or further site characterization is-required. If the groundwater sample <br /> from the monitoring well is below detection limits for the constituents for which it is <br /> analyzed, or after it is no longer needed for groundwater monitoring, the well will be <br /> properly abandoned. <br /> If the well will be abandoned, it will be done by following these steps: <br /> 1. The well will be overdrilled with a larger auger than used to install the <br /> original borehole for the well. <br /> ' - I <br /> 2, The casing will be removed through the center of the auger. <br /> i <br /> 3. The borehole will be backfilled with a neat cement slurry. <br /> 4. The top foot of the borehole will be capped with concrete. <br /> The necessary permits will be obtained before any additional wells are installed or <br /> the existing well is abandoned. j <br /> i <br /> i <br />