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0 C�) Limited Subsurface Investigation anteagroup Work Plan 908 East Scotts Avenue Stockton, California 1.0 INTRODUCTION Antea TmGroup has prepared this work plan for conducting a limited subsurface investigation for the site located at 908 East Scotts Avenue,Stockton, California. This subject property (parcel ID#15130001) encompasses the entire city block (1.72 acres) bounded to the north by East Scotts Avenue, the west by South Aurora Street, and to the east and south by railroads. As a follow up to a recent environmental assessment conducted at the subject site,Antea Group plans to complete this limited subsurface investigation to establish baseline soil conditions prior to a potential property transaction. This planned investigation focuses only on soil testing at certain features or in general areas identified as potential environmental concerns (PECs) due to the historical industrial occupancy of this property and the surrounding areas.. Soil testing locations will focus on those PECs with the highest potential for soil contamination, based on the findings of the Phase I ESA. In addition,Antea Group will evaluate the possible presence of subsurface features that may indicate PECs not identified during a recent Phase / Environmental Site Assessment (ESA). Planned activities at the site include a site walk, utility clearance and ground-penetrating radar (GPR) survey, shallow soil boring advancement,and soil sampling/analyses. 2.0 SITE BACKGROUND In February 2012,Antea Group completed a Phase I ESA for the subject site. The report concluded that based on the available historical information dating back to 1895, industrial development of the subject property and surrounding area occurred prior to 1895. Specifically, the subject property's usage has included various industrial operations for well over 100 years,including the following(all dates are approximate): • Prior to 1895 to 1920s—agricultural implement manufacturing (Houser & Haines Manufacturing Co. and The Holt Manufacturing Co.). • 1920s to late 1950s—truck and tractor or implement repair and manufacturing. Original buildings were razed sometime in this period,and newer buildings were constructed. • Late 1950s to present—various truck/tractor or agricultural implement repair facilities, a helicopter blade repair shop, machine shops, and other miscellaneous commercial and industrial operations, including furniture manufacturing and glass repair. The recent Phase I ESA revealed the following recognized environmental conditions (RECs), as defined by the American Standard for Testing and Materials(ASTM)standard E1527-05,in connection with the subject property: 1 www.anteagroup.com