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0 I. INTRODUCTION <br />C <br />This report presents a ground -water detection monitoring plan for a <br />proposed Class III sanitary landfill (referred to as the North County <br />Sanitary Landfill) in northeastern San Joaquin County, California (see <br />Figure 1). The plan was prepared in compliance with Article 5, Sub- <br />chapter 15, Chapter 23 of the California Administrative Code (referred <br />to as Subchapter 15). Included within this document are (1) a brief <br />summary of the geologic and hydrogeologic conditions at the site, <br />(2) a description of the proposed detection monitoring system, <br />(3) justification for the locations of monitoring points, and (4) de- <br />tails of field procedures, sampling protocol, and laboratory analysis. <br />San Joaquin County currently operates the Harney Lane Sanitary Land- <br />fill, a Class III disposal facility located about 7 miles east of <br />Lodi, California. The landfill is expected to reach full capacity by <br />late 1990. For future development of a replacement landfill, the <br />County purchased a 320+ acre parcel about 1-1/2 miles east of the <br />existing landfill (see Figure 1). <br />EMCON Associates performed a detailed geologic and hydrogeologic <br />investigation of the replacement site during the summer of 1987. This <br />followed investigations by J.H. Kleinfelder and Associates at the <br />currently proposed site (1986) and the adjacent Arizcuren property <br />(1980x). A report, entitled 6pa agic aod Hydrogeoloaic Report, Pro- <br />posed Landfill Development Site. San Joaquin CountX. California, was <br />prepared by EMCON Associates (1987b) to fulfill data requests con- <br />tained in Article 9 of Subchapter 15. That report forms the basis for <br />this monitoring plan. <br />PJ9 9390207.00D 1 <br />