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e <br /> v <br /> j <br /> 3) Reduce sampling frequency of well MW4 from quarterly to semi-annually Although MW4 is <br /> located roughly down gradient of the contaminant source, gasoline constituents in the well are <br /> generally at or below laboratory detection limits Semi-annual sampling of well MW4 and <br /> continued quarterly sampling of well MW8, located further downgradient, will sufficiently track <br /> potential migration of the contaminant plume Well MW4 would be sampled on alternating <br /> quarters with wells MW3 and MWS, which are currently being sampled semi-annually, <br /> 4) Reduce sampling frequency of well MW2 from quarterly to semi-annually MW2 is located <br /> cross-gradient (southwest) of the contaminant source and consistently contains relatively low <br /> levels of gasoline constituents Well MW2 would be sampled in conjunction with well MW4, <br /> on alternating quarters with wells MW3 and MW5, <br /> Wells MW3 and MWS will continue to be sampled on a semi-annual basis, wells MW1 and MW8 will <br /> be sampled on a quarterly basis Fluid levels will be monitored in all site wells on a quarterly basis <br /> Site status reports will be submitted quarterly <br /> Please contact John Lane or Greg Stahl at your convenience if you have any questions or comments <br /> regarding the site <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> ` RED GE <br /> John P Lane ���� 0��� <br /> Sen r Geologist <br /> GREGORY P. <br /> STAHI- <br /> No 5023 <br /> Gregory P Stahl <br /> CA Registered Geologist No 5023 OF CALF <br /> JPL <br /> Attachments <br /> cc Mr Carl Knowles <br /> Mr Mike Buck, Riddle & Isola <br /> Ms Elizabeth Thayer, CRWQCB <br /> ground7elknowles haml3gmr1995 1p] 3 <br />