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t • • Page 2 of 2 <br /> From: Ezaria Nona [mailto:EzariaNrrlagtienv.com] <br /> Sent: Tuesday, February 14, 2012 8:37 AM <br /> To: Vicki McCartney [EH] <br /> Cc: Jenny Weese; Ray Kablanow <br /> Subject: George's Service (1600 Durham Ferry Road) <br /> Good Morning Vicky, <br /> I would like to give you an update on the status of the Phase I implementation at the George's Service <br /> site. In summary,your November 14, 2011 letter directed implementing the following tasks: <br /> 1. Contact the RWQCB to determine the need to submit a permit for Waste Discharge <br /> Requirements <br /> 2. Perform annual GWM in wells SW-101 and MW-7 only and include DTW measurements in MW-5 <br /> and MW-8. <br /> 3. Assemble the Air Sparging equipment <br /> 4. Inject air into OS-1, OS-2 and possibly MW-2 <br /> 5. Operate the air sparge system in bio-treatment mode (15 min in OS-1,followed by 15 min in OS- <br /> 2, then off for 30 min) <br /> 6. Monitor arsenic and hexavalent chromium in groundwater collected from OW-2, MW-2 and <br /> MW-106 prior to operating the air sparge system, and subsequently during the 2nd and 4th <br /> quarters of 2012 <br /> 7. Measure DO levels monthly in OW-2, MW-2 and MW-106 <br /> 8. Monitor the air sparging system monthly <br /> Based on the available funds and costs to do the above work,GTI, on behalf of the Teranishi s, can <br /> perform items 2,3,4,5,7 and 8 between now and June 30, 2012. Task 1 is not required by the RWQCB, <br /> therefore GTI will not monitor for arsenic and hexavalent chromium in groundwater(task 6), per your <br /> November 14,2011 letter. With respect to task number 4, GTI will only inject air into OS-1 and OS-2 <br /> during Phase I implementation to avoid the lateral spreading of contaminants as MW-2 is the most <br /> contaminated well at the site. The Air sparge system installation is tentatively scheduled for Monday <br /> February 20 and GTI anticipates system start up shortly after. <br /> Ezaria Nona, B.S. <br /> Geology <br /> Geological Technics Inc. <br /> 1172 Kansas Avenue <br /> Modesto, CA 95351 <br /> 209-522-4119 - phone <br /> 209-522-4227- fax <br /> ezarian@gtienv_com <br /> Web Site: gtienv.com <br /> 2/29/2012 <br />