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FREY ENwRONMENTAL, /NC. <br /> Environmental Geologists,Engineers,Assessors <br /> 2817A Lafayette Avenue <br /> Newport Beach, CA 92663 <br /> (949)723-1645 <br /> Fax(949)723-1854 <br /> Email.FREYincQo FREYinc.com <br /> October 30, 2023 <br /> 1175-01 <br /> Alan M. Buehler <br /> RWQCB Central Valley Region <br /> 11020 Sun Center Dr <br /> Rancho Cordova, CA 95670 <br /> WORKPLAN <br /> INSTALLATION OF A BIOSPARGE WELL <br /> BOULEVARD AUTOMOTIVE <br /> 2151 COUNTRY CLUB BOULEVARD <br /> STOCKTON, CALIFORNIA <br /> RWQCB CASE NO. R-34883 <br /> Global ID #T0607700030 <br /> Dear Mr. Buehler, <br /> FREY Environmental, Inc. (FREY) has prepared this workplan to install a biosparge well at the <br /> Boulevard Automotive Facility located at 2151 Country Club Boulevard in Stockton, California <br /> (Site) (Figures 1 through 3A). This workplan has been prepared pursuant to a directive letter from <br /> the Central Valley Regional Water Quality Control Board (RWQCB) dated August 30, 2023 <br /> (Appendix A). <br /> SITE AND SITE VICINITY DESCRIPTION <br /> The Site is currently a tire/muffler repair shop with a single-story building of approximately 4,900 <br /> square feet on the eastern portion of the parcel with three (3) service bays fronting Country Club <br /> Boulevard. An approximate 360 square foot storage shed adjoins the main building along its <br /> western wall. The remainder of the Site is comprised of an asphalt/concrete parking area. <br /> The Site is located within a mixed residential and commercial area and is bound to the north by <br /> residential houses,to the west and east by commercial buildings, and to the south by Country Club <br /> Boulevard(Figure 2). <br /> GEOLOGY AND HYDROGEOLOGY <br /> REGIONAL GEOLOGY AND HYDROGEOLOGY <br /> The Site is located in the central portion of the Great Valley Geomorphic province, an elongate <br /> alluvial plain extending from the Tehachapi Mountains in Southern California to the Klamath <br /> Mountains in Northern California that is bound by the Sierra Nevada range to the east and the <br /> Coast Ranges to the west. The Great Valley is divided in to the Sacramento Valley in the north <br /> with the San Joaquin Valley occupying the southern portion (Hackel, 1966). The San Joaquin <br />