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MW4, MW7, and MW8 Samples were not collected from wells MW3, MWS, and MW6 <br /> Analytical results for the reporting period are summarized in Table 2 Laboratory data sheets <br /> and chain of custody documentation are included in Attachment B <br /> San Joaquin County Public Health Services, Environmental Health Division approved <br /> modifications to the groundwater monitoring and sampling programs at the site as follows wells <br /> MW6 and MW7 will be temporarily removed from the sampling program, wells MW3 and <br /> MW5 will be sampled on a semi-annual basis during first and third quarters, wells MW2 and <br /> MW4 will be sampled on a semi-annual basis during second and fourth quarters, and wells MW1 <br /> and MW8 will be sampled on a quarterly basis Fluid levels will be monitored in all site wells <br /> on a quarterly basis Site status reports will be submitted quarterly <br /> VAPOR EXTRACTION TEST <br /> Ground Zero is planning to perform a limited vapor extraction test on well MW4 to determine <br /> if sufficient air flow rates are achievable in the fine-grained soils which remain impacted by <br /> residual hydrocarbons The current depth to water in well MW4 is approximately 47 5 feet <br /> Ground Zero anticipates that the limited vapor extraction test on this well will not be feasible <br /> until the depth to water is approximately 50 feet <br /> The next quarterly monitoring and sampling is scheduled for February 1996 <br /> Please contact John Lane or Greg Stahl at your convenience if you have any questions or <br /> comments regarding the site <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> 4jq ,Lov' If% RED GF-� <br /> John P Lane <br /> Sem Geologist GREGORY P <br /> JSTRHL <br /> N <br /> o. 5023 <br /> Gregory P Stahl �TgTf OF CAI�����\Q <br /> CA Registered Geologist No 5023 <br /> CA Certified Hydrogeologist No 264 <br /> Attachments <br /> PC Mr Carl Knowles <br /> Mr David Isola, Riddle & Isola <br /> Ms Elizabeth Thayer, CRWQCB Sacramento <br /> groundzelknowles ham14gm1995 2 <br />