ARCHIVED REPORTS_2018 REV SITE INV WK PLAN+

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t DAssociates, Brusca L. Inc. Environmental Engineering Geology February 12, 2018 Buzz Oates Development and Construction Services Attention: Cybil Bryant 555 Capitol Mall,Ninth Floor Sacramento, CA 95814 SOIL GAS MONITORING WELLS INSTALLATION MURPHY PARKWAY PROPERTY APN 198-012-009 17100 Murphy Parkway Lathrop, California Brusca Project No. 137-002 INTRODUCTION In accordance with your request, we recently installed two soil gas monitoring wells at the subject property. The soil gas well installations and subsequent monitoring have been required by regulatory agencies overseeing environmental review of the site. Specifically, the soil gas monitoring program has been required to evaluate whether soil gas contaminants, including methane and volatile organic compounds (VOCs), exist at the westerly margin of the property as a result of uncharacterized subsurface wastes that reportedly exist offsite to the west of the subject site. As required, an existing soil gas monitoring well (identified as VP-1) was abandoned in conjunction with the recent soil gas monitoring well installation work. A Vicinity Map showing the location of the subject property is presented as Plate 1. Plate 2 is a Site Map showing the layout of the property, the location of a planned light-industrial building at the site, the locations of the recently-installed soil gas monitoring wells, and the abandoned soil gas monitoring well. A detail drawing of the far westerly portion of the property showing the locations of the two recently installed soil gas monitoring wells and the layout of planned pavements in this area is presented as Plate 3. Logs of the two recently-installed soil gas monitoring wells are presented on Plates 4 and 5. Well permit documentation also is attached. BruscaAssociates.com• P.O.Box 332,Roseville,CA 95661 • Phone(916)677-1470