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y <br /> i <br /> As discussed in the I" Semi-Annual 2012 Groundwater Monitoring & Remedial Effectiveness <br /> report dated June 29a', 2012, following nine (9) months of the Phase I feasibility study, hydrogen <br /> peroxide injection was chosen for Phase II of the remedial action plan. In the report, GTI <br /> recommends that the 1-year feasibility study (Phase I) cease and begin implementing Phase II of <br /> remediation by expanding the hydrogen peroxide injection scheme. In a letter dated October 9a`, <br /> 2012, SJCEHD approved the recommendations made in the 1"Semi-Annual 2012 Groundwater <br /> Monitoring & Remedial Effectiveness report and directed that GTI prepare and submit a <br /> Corrective Action Plan outlining Phase II of remediation by December 14th, 2012. <br /> GTI completed the final Phase I hydrogen peroxide injection event and monthly groundwater <br /> monitoring event on July 13`h and July 30th, 2012, respectively. GTI began implementing the <br /> interim remedial plan on August 1", 2012, which included: <br /> • Removal of the ORC Advanced socks and start bi-monthly hydrogen peroxide injections <br /> in injection well IW-1. <br /> • Cease researching natural attenuation and start bi-monthly hydrogen peroxide injections <br /> in injection well IW-3. <br /> • Reduce the frequency of hydrogen peroxide injections into injection well IW-2 from bi- <br /> monthly to monthly. <br /> • Continue air sparging in injection well IW-4. <br /> • Reduce groundwater monitoring for remedial performance from monthly to a quarterly, <br /> using the same wells, sampling procedures and laboratory analysis. <br /> GTI continued implementing the interim remedial plan as described above thru October 5`h, <br /> 2012. The interim remedial plan was modified and approved by SJCEHD in an email dated <br /> October 18`h, 2012. The modified interim remedial plan has the following changes: <br /> • Monthly hydrogen peroxide injections into injection wells IW-1, IW-2 and IW-3. <br /> • Continue air sparging in injection well IW-4. <br /> • Omit the 4`h quarter (October) groundwater monitoring event and begin quarterly <br /> groundwater monitoring in the 151 Quarter of 2013 (January). <br /> On August 15, 2012 GTI submitted a change order to the Fund requesting additional funding to <br /> continue the implementation of the interim remedial plan and implement Phase II of the remedial <br /> action plan upon approval from SJCEHD. GTI is currently waiting for a response from the Fund. <br /> Proposed 4th Quarter 2012 Activities <br /> It is anticipated that during the 4th Quarter 2012, GTI will continue implementing the modified <br /> interim remedial plan and submit a Corrective Action Plan outlining Phase II of the remedial <br /> plan by December 14th, 2012 as directed in an SJCEHD letter dated October 9th, 2012. <br /> The 4th quarter 2012 groundwater monitoring event has been omitted per an SJCEHD email <br /> dated October 18'h, 2012. Quarterly groundwater monitoring events will begin in the I't quarter <br /> of 2013. <br /> 3r°QMR 12 letter format 2 of 3 <br />