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Soil vapor probes were constructed within soil borings B1, B2, B3, B4 and B6. No soil probes were constructed in soil <br />boring B5. Following completion of drilling, new 1 -inch diameter polyvinyl chloride (PVC) casing was inserted into the <br />borehole to the desired depth. New 1/4-inch diameter Nylaflow® nylon tubing with a 3/8-inch diameter polypropylene <br />filter at the terminal end was inserted into the borehole through the PVC casing to the desired sampling depth. The PVC <br />casing was used as a guide for the tubing to ensure that the desired sampling depth was achieved. No. #3 Monterey <br />sand was poured into the boring annulus through the PVC casing to form an approximately 1-foot long sand pack around <br />the polypropylene filter, at which time the PVC piping was withdrawn and approximately 1 foot of dry, granular <br />bentonite (bentonite #18) was placed atop the sand pack, poured through the PVC casing. The casing was then slowly <br />removed as hydrated bentonite was added until the borehole was backfilled with hydrated bentonite to the next probe <br />placement point, where the sand pack placement procedure was repeated, or was backfilled to approximately 2-3 <br />inches bgs to form a seal. The sampling end of the tubing was fitted with a valve and the probe was labelled for <br />identification. Nested soil vapor probes were constructed at 5 and 15 feet bgs in the borings. <br />All the best <br />Andrew <br />TERRAX Environmental, Inc. <br />Environmental Engineering and Consulting <br />Andrew Brack <br />16541 Gothard Street, Suite 111, Huntington Beach, California 92647 <br />Tel cell: 714-717-1037 office: 714 846 2974 <br />andrew(@terraxenv.com <br />This E-mail is covered by the Electronic Communications Privacy Act,18 U.S.A. sections 2510-2521 and is <br />legally privileged. This information is confidential information and is intended only for the use of the <br />individual or entity named above. If the reader of this message is not the intended recipient, please <br />contact Terrax immediately. You are hereby notified that any dissemination, distribution or copying of this <br />communication is strictly prohibited. <br />From: Michael Kith [EH] [mailto:mkith@sjcehd.com] <br />Sent: Tuesday, September 26, 20173:12 PM <br />To: Andrew Brack <andrew@terraxenv.com > <br />Subject: RE: Well abandonment permit application. <br />Can you give me more information on this soil vapor probe? When were they installed? <br />Your permit application is incorrect. You need to submit the Site Mitigation Well & Boring Permit Application. See <br />attached. <br />Michael Kith, Lead Sr REHS <br />San Joaquin County <br />Environmental Health Department <br />mkith@sicehd.com <br />Phone: (209) 468-3444 <br />Fax: (209) 468-8392 <br />2