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i <br /> ENVIRONMENTAL � � <br /> H]EALTlf DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> U �o <br /> Q. ` Donna K.Heran,R.E.H.S. Unit Supervisors <br /> Director 304 East Weber Avenue, Third Floor Carl Borgman,R.E.H.S. <br /> Al Olsen,R.E.H.S. i Mike Huggins,R.E.H.S.,R.D.I. <br /> Stockton, California 95202-2708 <br /> • c •. v • <br /> Program Manager Douglas W.Wilson,R.E.H.S. <br /> 4�iFOR�� <br /> Laurie A.Cotulla,R.E.H.S. Telephone: (I�09) 468-3420 Margaret Lagorio,R.E.H,S. <br /> Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> FREDERICK CLARK APR 2 6 2004 <br /> CITY OF MANTECA <br /> 1001 CENTER STREET <br /> MANTECA CA 95336 <br /> i <br /> RE: I'v4anteca City Corporation Yard Site Code: #0690 <br /> 210 East Wetmore Street <br /> Manteca CA 95336 <br /> )VL ORK PLAN: `1OZone Injection Pilot Study Work Plan Addendum" <br /> DATED: April 16,2004 <br /> PREPARED BY: Advanced GeoEnvironmental,Inc. <br /> APPROVED: �x] <br /> DISAPPROVED: JJ <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE XVORK1 PLAN [H&S 25299.37,subd(c)(3)]: <br /> 1. This Addendum modifies the previously-approved "Ozone Inject!on Pilot Study Work Plan"dated March 5,2004 by <br /> changing the construction of one of the proposed sparge point borings. The boring proposed for installation in <br /> the truck wash area will be moved to just off the concrete pad of the wash area and will be installed at a 30 degree <br /> angle to reach groundwater contamination under the pad. <br /> 2. The sparge point installed in the angle boring will be installed with the use of centralizers to insure proper placement <br /> of all well constriction materials. <br /> COMMENTS AND CONDITIONS: <br /> 1. Submit a San Joaquin County Well Permit Application and required$89.00 permit fee. <br /> 2. A report of findings must be submitted within 60 days following completion of all fieldwork. <br /> 3. Forty-eight hours notice to SJC/EHD is required prior to all site fieldwork. <br /> V <br /> Lori Duncan,Senior REHS Nuel C.Henderson,Jr.,R.G. <br /> LOP/Site IVlitigadon Unit IV LOP/Site Mitigation Unit IV <br /> cc: James Barton,CVRWQCB <br /> Brian Millman,AGE <br />