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BruscaAssociates.com ● P.O. Box 332, Roseville, CA 95661 ● Phone (916) 677-1470 <br /> <br /> <br /> <br /> <br />June 25, 2019 <br /> <br /> <br />Buzz Oates Development and Construction Services <br />Attention: Cybil Bryant <br />555 Capitol Mall, Ninth Floor <br />Sacramento, CA 95814 <br /> <br />2nd QUARTER 2019 SOIL GAS MONITORING <br />MURPHY PARKWAY PROPERTY <br />APN 198-120-009 <br />17100 Murphy Parkway <br />Lathrop, California <br />Brusca Project No. 137-002 <br /> <br /> <br />INTRODUCTION <br /> <br />In accordance with your request, we performed monitoring/sampling of the two soil gas <br />monitoring wells (SGMW1 and SGMW2) at the subject property in June 2019. Implementation <br />of a soil gas monitoring program has been required by regulatory agencies overseeing <br />environmental conditions at the site. Specifically, the soil gas monitoring program has been <br />required to evaluate whether soil gas contaminants, including methane and volatile organic <br />compounds (VOCs), exist at the westerly margin of the property as a result of uncharacterized <br />subsurface wastes that reportedly exist offsite to the west of the subject property. <br /> <br />A Vicinity Map showing the location of the subject property is presented as Plate 1. Plate 2 is a <br />Site Map showing the layout of the property, a light -industrial/warehouse building recently <br />constructed at the site, and the locations of the two onsite soil gas monitoring wells. A detail <br />drawing of the far westerly portion of the property showing the locations of the soil gas <br />monitoring wells and the layout of planned pavements in this area is presented as Plate 3. Soil <br />gas field screening data and analytical laboratory results are summarized on the attached Table I. <br />The laborato ry reports and chain-of-custody documentation also are attached. <br /> <br /> <br /> <br /> <br /> <br /> <br />