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sin <br />EWRONMENiALiEGHNDLOGIESCORPORA710h! <br />APS 17 1995 <br />..-- ril 14 --1995 - <br />ENVIRONMENTAL NEALTH <br />A <br />P PERMIT/SERVICES <br />95-107 <br />{-MS. Linda Turkatte y <br />San Joaquin County Public Health- Services <br />Environmental-Health Division- <br />--P:O::Box"388 <br />­Stockton, CA 95201-0388 <br />"— Subject: Site Closure Workplan, .Corrigan .Property, 620- Sari Juan_ Drive, Stockton, <br />l California, Site Code.2001 <br />II r <br />Ms. Turkatte: _. <br />On behalf ofyMs. =.Zona Corrigan;'Canonie/SmithaEnvironmental .Technologies Corporation <br />II4 (SMTH) is submittin this site closure"wor lafi_ and well destruction application in accordance <br />g kP PP <br />with San'Joaquin County Pub lic.Health-,Services`;-Environmental Health -Division'(PHSIEHD) <br />correspondence dated Fe6rua`ry 22; 1995. r- - w <br />r ' SMTH proposes, to abandon site _mon itaring W1; <br />wells M#MW-.21 and-MW3 by-filling :each well <br />casing -and filter pack with . a . neat: cement/bentonite . grout.' The grout - will be emplaced by- <br />pressure grouting -with a pressure groutir►g tool: Forprotection of the seal at the land surface a <br />_ - hole at least two feet in diameter will.be excavated around.the,outside of., each well casing'to a <br />-. - <br />-depth of approximately three feet below ground'-surface. The -sealingmaterial"used to seal the <br />well will' be:allowed to spill over: into the excavations_ After the sealing material'has set, the - , <br />` 'excavation will be filled with native soil to restore thesite. <br />, _-_Based upon swell construction details and assuming the filter pack-for each -well­: has. an - <br />estimated'porosity�of,25.17 (Heath; R..C., :1983)., an estimated volume of_,71-gallons:-of'gout = . <br />will.be.used`to abandon -the.three wells. This estimated volume includes a contingenc <6ased <br />. upon:;.the ..formation ;,-type.:...,Moriitoringwell' construction -data,-- soil boring logs, -and grout.. - <br />- -volume calculations are attached: - <br />— 15005411wP-0495.doc <br />1710 Main Street Escalon, CA 95320 . • (209) 838-3507= • fax (209) 838-3509 <br />Engineering --Consulting Remediation - Construction - <br />