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J at $ <br /> WATERWORK y d <br /> ILA: <br /> R GEOCHEMIGAL • GEOTECHNICAL. + ENVIRONMENTAL_ Z <br /> 29 7 <br /> May 24 , 1988 Z <br /> Ino <br /> David Caris <br /> Sari Joaquin Focal Health District � zo <br /> 1601 East Hazelton Avenue ;) co <br /> Stockton, CA 95201 <br /> Re : Monitoritlg Well Installations <br /> Navarra Property, 152 East llth Street, Tracy, CA <br /> gear David : . <br /> In reference to the installation of two additional monitoring wells . ` <br /> 'as part of a hydrocarbon assessment of the ak4oVe referenced :< <br /> property, we request a variance in the. 50. foot.._,i•solatian. .:alstance <br /> .from a sanitary sewer line and 10 foot iso,latlo.n distance ' from a <br /> property line . As presented on Figure--V"'.our proposed wells are <br /> located within the public sidewalk -on ' the south side of East 11th <br /> S Street approximately 30 feet. south of a sanitary sewer line running <br /> east west on the north 5,ide .of " 11th Street. In addition, the wells <br /> are within 10 feet of the property lines. The well. locations were <br /> chosen to define the lateral extent of hydrocarbon contamination of <br /> groundwater and placed- in the public right of way to eliminate U"It! <br /> delays associated with obtaining private property gwt►ets permission <br /> for well installation. <br /> As I am sure you are aware or shortly will be, it is very difficult <br /> to drill within city limits and be 50 feet away from a sewer line . <br /> w._._. . _Similarlyi-strategic _placement. of monitoring. w.ell:s.--ond uori: fLxalnts _._ <br /> imposed lay buildings, streets, and ug utlllties often ' require <br /> drilling within 10 feet of a property line. SiOce the . <br /> implementation of isolation distances is, at last In ;part, to <br /> prevent conduits to groundwater from being located adjacent to <br /> sources of contaminant discharge (sewer line's, leach <br /> field, privies ) . I would remind you that the shallow depth ., water <br /> t- in Tracy (approximately 8 feet) precludes such conduits as .being a <br /> major factor when not located immedia�ely adjacent to such source: . <br /> 4 <br /> !, As we are under time constraints set by the California Regional <br /> Water. Quality Control Board - Central Valley Region, piompt <br /> response to our requested variance would be greatly appreciated . <br /> If you have questions or have suggestions as to how we might <br /> resolve this sruat:ion, please contact me at our Sacramento office . <br /> Respectfully, <br /> WaterWark <br /> Robert W. tine <br /> Geo-lo ist : <br /> RWJ :ect <br /> 1485 EXPOSITION BLVD..SUITE 456 SACRAMENTO. CA 95$115 A1C>> 921 115 <br /> FRESNO,-CA (209)4318035 SAN LUIS OBISPO.CA (605):i44.65k36, RENO. NV t702►78 eiL3�U <br />