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• Injection wells IW-1 through IW-4 were thoroughly developed using mechanical surging, <br /> pumping and flushing methods on September 8,2011. <br /> • GTI is currently waiting the receipt and approval of the Waste Discharge permit before <br /> implementing Phase I activities. <br /> • A report of well installation is in process and will be completed by mid-October. <br /> Additionally, GTI would like to propose the following changes to the groundwater monitoring <br /> for the fiscal year 2011/2012. Our goal is to minimize costs for groundwater monitoring, <br /> allowing us to redirect funds toward remediation of the plume and still obtain pertinent data for <br /> making technical decisions on the operation and success of the remediation. <br /> We propose the following: <br /> 1. Discontinue monitoring for the following wells: MW-1, -2, -3, -7, -10 & -109. These well <br /> have been non-detect for several years and do not provide pertinent information on remedial <br /> activities. <br /> 2. Four wells to be monitored semi-annually on the second and fourth quarters for TPH-G, <br /> BTEX & MtBE, using method 8015m/8021b: MW-4, -6, -8 & -9. These wells are center to <br /> the contaminant plume and will provide important information on the remedial activities on <br /> the extended portions of the plume. <br /> 3. Four remedial observation wells to be monitored monthly forTPH-G,BTEX&MtBE, using <br /> method 8015m/8021b: MW-5,OW-1, -2 &-3. These wells will provide rapid analysis of the <br /> impact the various remedial activities are having on the contaminant plume. <br /> 4. These same observation wells to be monitored semi-annually on the second and fourth <br /> quarters for metals: MW-5, OW-1, -2&-3 <br /> 5. Based on the analytical results from the composited soil samples collected at the site between <br /> June 27 and June 29, 2011, the metals analysis will be limited to As, Ba, CrVI, Fe, K and <br /> Mg. Please refer to the attached data table of previous metals analysis of the soil. <br /> 6. Semi-Annual groundwater monitoring will include depth to water measurements in all <br /> monitoring wells. <br /> 7. The above monitoring schedule was also submitted in the NOI and associated Monitoring <br /> and Reporting Program that was sent to the Regional Board for review on September 8, <br /> 2011. In the event the RB requires additional monitoring, GTI will adjust the monitoring to <br /> adhere to the NOI. <br /> Please let me know if you have any questions or need additional information, <br /> Respectfully Subm'tted, <br /> Ra 0e,"1 11, ignW by Ra I.Habim. <br /> ,� ON: = ynold n <br /> Kablla�lA�w"ff' .M-11 z: . <br /> Raynold 1. Kablanow 11, Ph.D. <br /> Vice President <br /> PG,CHG <br /> cc: George Betker <br /> Catherine Kahler <br />