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Michael Please find enclosed the original construction permit, the abandonment workplan, master file and application. Terrax obtained a Well Construction Permit from the San Joaquin County Environmental Health Department for advancement of the soil borings. A copy of the permit is attached. The permit was issued on October 17, 2016 for the advancement and construction of the soil vapor monitoring wells. Soil vapor probes were constructed within soil borings B1, B2, B3, B4 and B6. No soil probes were constructed in soil boring B5. Following completion of drilling, new 1 -inch diameter polyvinyl chloride (PVC) casing was inserted into the borehole to the desired depth. New 1/4-inch diameter Nylaflow® nylon tubing with a 3/8-inch diameter polypropylene filter at the terminal end was inserted into the borehole through the PVC casing to the desired sampling depth. The PVC casing was used as a guide for the tubing to ensure that the desired sampling depth was achieved. No. #3 Monterey sand was poured into the boring annulus through the PVC casing to form an approximately 1-foot long sand pack around the polypropylene filter, at which time the PVC piping was withdrawn and approximately 1 foot of dry, granular bentonite (bentonite #18) was placed atop the sand pack, poured through the PVC casing. The casing was then slowly removed as hydrated bentonite was added until the borehole was backfilled with hydrated bentonite to the next probe placement point, where the sand pack placement procedure was repeated, or was backfilled to approximately 2-3 inches bgs to form a seal. The sampling end of the tubing was fitted with a valve and the probe was labelled for identification. Nested soil vapor probes were constructed at 5 and 15 feet bgs in the borings. All the best Andrew TERRAX Environmental, Inc. Environmental Engineering and Consulting Andrew Brack 16541 Gothard Street, Suite 111, Huntington Beach, California 92647 Tel cell: 714-717-1037 office: 714 846 2974 andrew(&terraxenv.conn This E-mail is covered by the Electronic Communications Privacy Act,18 U.S.A. sections 2510-2521 and is legally privileged. This information is confidential information and is intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, please contact Terrax immediately. You are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. From: Michael Kith [EH] [mailto:mkith@sicehd.corn] Sent: Tuesday, September 26, 2017 3:12 PM To: Andrew Brack <andrew@terraxenv.com > Subject: RE: Well abandonment permit application. Can you give me more information on this soil vapor probe? When were they installed? Your permit application is incorrect. You need to submit the Site Mitigation Well & Boring Permit Application. See attached. 2