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Pagel of 2 Lori Duncan [EH] From: Art Deicke[adeicke@advgeoenv.com] Sent: Friday,April 02, 2010 2:43 PM To: Lori Duncan [EH] Cc: rmarty@advgeoenv.com Subject: Ernie's GS Interim Remediation System Installation Status Update#3 Lori, Last week, we reported we sent out the Engineering Advance to PG&E. Today (4/2), Thomas from PG&E called to further discuss the progress. He stated that his field crews are reserved 5 weeks out and are not immediately available to remove the vault cover so Thomas and a PG&E engineer inspect the conduits and wiring. However, Thomas stated that the engineering plans indicate that the PG&E service wiring to Ernie's building and by the way to McDonald's is direct lay wiring. In other words, the wiring is in the native material and not in conduit. This means, that to either upgrade the service to the building or to only install minimum service that goes directly to the back where the remediation system is would require trenching. For upgrade to existing service, the old wiring would have to be dug out and new, up to current code wiring and conduits would be installed. For Additionally for upgrade to service, a transformer (above ground pad)would have to be installed. Each of these options is considered time- consuming and expensive. Another option being considered is to use a generator to power the electrical needs of the system with propane remaining as the fuel for the oxidizer. Short term costs for this method might be feasible for 60 days or so. Once the highest concentrations are knocked down, we would switch to carbon treatment with a less power intensive blower. Monthly costs for this method would include the generator rental and fuel. The generator can be powered by propane so we would only have one fuel source. After 60 days, we would switch to carbon treatment to reduce costs and change to a smaller blower. We are researching diesel versus propane costs for the generator. If feasible, we may be able to draw enough electrical from the existing service and install a dedicated meter. Carr Electric, PG&E reps and AGE are trying to schedule a meeting at the site for Monday to review the more permanent (trenching) options. I will let you know the outcome of that meeting. Would SJCEHD consider the 60-day generator option? If so, we could be installed and running in a short period of time. Best regards, Art Arthur Deicke Advanced GeoEnvironmental, Inc. Stockton - Santa Rosa * Monterey * Brea • Spokane 1-800-511-9300 ade i c k e@ad vgegmv.conn 4/2/2010