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FILE COPY <br /> PUBLIC HtALTH SERVICES a.u�N <br /> SAN JOAQUIN COUNTY 4P` c <br /> ENVIRONMENTAL HEALTH DIVISIONILA <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> JAMES GIOTTONINI <br /> PUBLIC WORKS DIRECTOR <br /> CITY OF STOCKTON <br /> 425 N EL DORADO ST <br /> STOCKTON CA 95202 <br /> RE: 110 W SONORA ST SITE CODE: 1253 <br /> FIRE STATION#2 <br /> STOCKTON CA <br /> WORKPLAN: DsignPlarr and S tfuatiomfur Sal and GanndzwerRmniiation DATED: October 5,2000, <br /> PREPARED BY: ATC Associates Inc. <br /> APPROVED <br /> DISAPPROVED <br /> ADDENDUM ❑ Submit by: <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN(H86 25299.37,subd.(c)(3).): <br /> 1. Three 2-in shallow vapor wells,a Gast R6P155R 50 vacuum blower(max.85 cu in of H2O and 280 <br /> std.cu.ft/min),subsurface piping,extraction control system within a remediation shed will be <br /> installed and connected with existing vapor wells on site. <br /> 2. Granular activated carbon will be used for off-gas abatement. <br /> 3. Three 2-in.air sparge wells,a Gast 6066-PI22A rotaryvance compressor(max.201b./sq.in.and 55 <br /> std cu.ft/min) and associated piping and valve control will be installed for the air sparge component <br /> of the remediation system. <br /> 4. Trenches will be dug for the piping layout of the remediation system. <br /> 5. Electrical power source (220V 150 am)will be installed for the system. <br /> 6. Periodic sampling(influent and effluent air samples)to evaluate the effectiveness of the system and <br /> emission level. <br /> CONIMENTS AND CONDITIONS: <br /> 1. Obtain well permits from PI-IS/EM and any other required permits from appropriate agencies <br /> before commencement of work. <br /> 2. Provide all measurements,sample results,and all other information on the state and effectiveness of <br /> the system to PHS/EHD as soon as possible within the first month after start-up. Coordinate all site <br /> visits with PHS/EHD. <br /> 3. Work should commence no later than March 31,2001. <br /> 4. A public notice will be posted by PHS/EHD on January 19,2001 providing information and <br /> decisions on the proposed corrective action in accordance to CCR,Title 23,Section 2728. <br /> REASONS FOR DISAPPROVAL OF THE WORKP 0-186 25299.37,subd.(Q(3)): <br /> None � <br /> DATED j& BY <br /> Cc: CRWQCB,Central ValleyRegion—Marty <br /> c <br /> Cc: ATC Associates,Inc.—Drew Van Allen <br /> A Division of San Joaquin County Health Care Services <br />