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Page 2 of 4 <br /> mitigation system PVC riser or from the actual crawl space using Summa Canisters as we <br /> have done before? <br /> 3) 1 ask for clarification because I might have confused the situation by just stating we were <br /> going to install a sampling port in the PVC riser to evaluate the air extracted from the <br /> crawl space instead of requesting approval to do that. This was never proposed or <br /> discussed with you; I just thought it might be a good idea to collect one air sample to see <br /> what we are extracting. What do you think about this? Should we collect an air sample <br /> from the PVC riser or just wait and collected a sample from the crawl space in 6 months? <br /> Sorry if I caused any confusion. <br /> And thank you very much for the update regarding the other sites. <br /> Have a good day and talk to you soon. <br /> Sincerely, <br /> Brian W. Millman <br /> California Professional Geologist#8574 <br /> Advanced GeoEnvironmental, Inc. <br /> Stockton • Santa Rosa • Monterey • Brea • Spokane • Reno • Dallas <br /> 1-800-511-9300 <br /> bmillman(a advgeoenv.com <br /> www.advgeoenv.com <br /> This email/fax message is for the sole use of the intended recipient(s)and may contain confidential and privileged information.Any <br /> unauthorized review, use,disclosure or distribution of this email/fax is prohibited. If you are not the intended recipient, please contact <br /> the sender by email/fax and destroy all paper and electronic copies of the original message <br /> From: Vicki McCartney [EH] [mailto:vmccartney@sjcehd.com] <br /> Sent: Thursday, July 26, 2012 2:43 PM <br /> To: bmillman@advgeoenv.com <br /> Subject: RE: LOP Site Updates, Scheduling, and Inquiries <br /> Good afternoon Brian, <br /> I am pleased to learn that the soil vapor intrusion mitigation system is in operation at the Weldon Church <br /> site at 104 Beverly Place in Tracy. I considered driving by this site today but time constraints prevented <br /> me from doing so. <br /> You mentioned that the first application of injecting five percent RegenOx will take place the third week of <br /> August. You will need a boring permit for the 5 boreholes to be injected. I will be on vacation from August <br /> 9th through August 17th, returning to work on August 20th, so I hope you plan to do the injections the week <br /> of August 20th. <br /> I will plan to be at the site on August 2nd for the sampling event. What time will the field technician be <br /> there? <br /> Our department has approved collecting ambient and indoor air samples every six months after the soil <br /> vapor intrusion mitigation system is in operation, but has not responded to AGE's recommendation to <br /> collect crawl-space samples every six months along with the ambient and indoor air samples. Please note <br /> that the Environmental Health Department approves the collection of the crawl-space sample every six <br /> months now that the system is in operation. <br /> Concerning the sites at 2353 Toste Road in Tracy and 1419 East Charter Way in Stockton, our department <br /> has discussed these sites with Jim Barton and I am preparing Case Closure Summaries for both sites to be <br /> sent to the Regional Board for closure concurrence. <br /> 7/26/2012 <br />