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_ Pagel of 5 <br /> Harlin Knoll [EH] <br /> From: Harlin Knoll [EH] <br /> Sent: Wednesday, June 01, 2011 2:01 PM <br /> To: 'Bill Cook' <br /> Cc: Kerry Wasson [GOVB] <br /> Subject: RE: Approved Remedial Feasibility Testing, 1810 E. Hazelton Ave., Stockton, CA(LOP Site Code <br /> 1141) <br /> Bill, <br /> The EHD has reviewed the latest ground water sample results and the request by Condor to modify (expand the <br /> scope)of the work plan (WP)approved 7 March 2003 that was prepared by Ramage Environmental. <br /> Your request is approved. The approved changes are as follows: <br /> 1. Lengthen the duration of the pilot test to 2-3 days period and preferably 24 hours of continuous operation each <br /> day. <br /> 2. To vary/adjust the extraction rate(vacuum)during the test to obtain more comprehensive data. <br /> 3. To perform in-situ air sparging (IAS) below the saturated zone in conjunction with soil vacuum extraction (SVE) <br /> in the vadose zone. <br /> 4. Add a ground water extraction component to the test to determine if this technology is feasible. <br /> In addition to these changes, EHD recommends sampling the ground water from the existing 60-foot IAS well pre <br /> and post pilot testing. The results should be evaluated in the feasibility study report that will be submitted. <br /> Please complete this long over due feasibility pilot test by 15 June 2011. <br /> If you have any further questions regarding this approval, please contact me for clarification. <br /> HARLIN KNOLL <br /> SAN JOAQUIN COUNTY/EHD <br /> 600 E MAIN STREET <br /> STOCKTON, CA 95202 <br /> (209)468-3442 <br /> FAX:468-3433 <br /> From: Bill Cook [mailto:bcook@condorearth.com] <br /> Sent: Wednesday, May 18, 2011 10:05 AM <br /> To: Nuel Henderson [EH]; Harlin Knoll [EH] <br /> Cc: Casey Kipf <br /> Subject: FW: Approved Remedial Feasibility Testing, 1810 E. Hazelton Ave., Stockton, CA (#1141) <br /> 1 am resending this because I missed a letter in the address on Monday. <br /> Bill A. Cook III, P. G., C. E. G. <br /> CWEA certified Environmental Compliance Inspector <br /> Associate Geologist <br /> bcook@condorearth.com <br /> Condor Earth Technologies, Inc. <br /> 6/1/2011 <br />