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0 4 <br /> ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> 2..• r„��,� .2Unit Supervisors <br /> e. Donna K.Heran,R.E.H.S. man,R.E.H.S. <br /> Director 304 East Weber Avenue, Third Floor Carl Bor g <br /> Al Olsen.R.E.H.S. Stockton, California 95202-2708 Mike Huggins,R.E.H.S..R.D.I.Douglas W.Wilson,R.E.H.S. <br /> C<gC'FOR��P Program Manager Telephone: (209) 468-3420 Margaret Lagorio,R.E.H.S. <br /> Laurie A.Cotulla,R.E.H.S. Robert McClellon,R.E.H.S. <br /> Program tlanager Fax: (2O9) 464-0138 Mark Barcellos,R.E.H.S. <br /> April 6,2004 Sent Certified and U.S.Mail <br /> Oxford Farms Inc. `9 <br /> 6748 E. Kettleman Ln_ FILE <br /> v <br /> Lodi,CA 95240 <br /> RE: Methane gas monitoring requirements at 15100 E.Harney Lane,Lodi,CA. (APN: 06504001) <br /> The San Joaquin County Environmental Health Department(EHD) is sending you this letter regarding the property located <br /> at 15100 E. Harney Lane, Lodi, CA (APN: 06504001). The EHD has determined pursuant to Title 27, California Code of <br /> Regulations (CCR)that a methane gas monitoring system is required inside buildings within 1000 feet of the boundary of <br /> any disposal area. The code section that applies to the above listed property is listed below: <br /> Title 27 CCR Section 21190 Postclosure and Land Use, <br /> (g) All on site construction within 1.000 feet of the boundary of any disposal area shall be designed and <br /> constructed in accordance with the following, or in accordance with an equivalent design which will prevent gas <br /> migration into the building,unless an exemption has been issued: <br /> (1) a geomembrane or equivalent system with low permeability to landfill gas shall be installed between <br /> the concrete floor slab of the building and subgrade; <br /> (2) a permeable layer of open graded material of clean aggregate with a minimum thickness of 12 inches <br /> shall be installed between the geomembrane and the subgrade or slab; <br /> (3) a geotextile filter shall be utilized to prevent the introduction of fines into the permeable layer; <br /> (4) perforated venting pipes shall be installed within the permeable layer, and shall be designed to <br /> operate without clogging; " <br /> (5) the venting pipe shall be constructed with the ability to be connected to an induced draft exhaust <br /> system; <br /> (6) automatic methane gas sensors shall be installed within the permeable gas layer, and inside the s <br /> \� building to trigger an audible alarm when methane gas concentrations are detected;and <br /> Zl(7) periodic methane gas monitoring shall be conducted inside all buildings and underground <br /> utilities in accordance with Article 6,of Subchapter 4 of this chapter(section 20920 et seq.). <br /> After review, the EHD has determined that the established home on 15100 E..Harney Lane is located within 1000 feet of <br /> the closed Harney Lane Landfill,and must comply with Title 27 CCR,Section,21090(gx6)and(g)(7). Because the house <br /> is already constructed and the EHD was unable to comment, conditions'six and seven should be met or complied <br /> with. <br /> Within 30 days of receipt of this notice, a written plan must be submitted to EHD for review and approval how <br /> methane gas monitoring sensors shall be installed inside buildings located within 1000 feet from the closed Harney <br /> Lane Landfill. <br /> r <br /> If you have any questions please contact Ted Tasiopoulos R.E.H.S.,of my staff at(209)953-7698. <br /> qRoe_rtQMcC15ek1on, R.E.H.S. <br /> Environmental Health Department <br /> Certified Letter# <br />