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T <br /> Advanced } << : <br /> GeoEnvironr , <br /> Mc. <br /> I:.00 <br /> 26 May 2004 <br /> .. AGE-NC.Project No. 98-0492- <br /> Mr..Jeff <br /> 8-0492Mr..Jeff Wong- - <br /> SAN JOAQUIN COUNTY PHS-EHD <br /> 304 East Weber Avenue, Third Floor- <br /> Stockton, CA 95201 = <br /> Subject: Monitoring Well Destruction Work Flan <br /> t <br /> -QUICKI-KLEEN CAR WASH <br /> 707 East Yosemite Avenue, Manteca, California . <br /> Dear Mr. Wong:_ <br /> At` the request of Mrs.:. MaryLou' Pontes 'of t e Quicki-Kleen Car Wash, Advanced <br /> GeoEnviror mental,Inc:(AGE)has prepared this work Ian for the destruction of three ground water <br /> monitoring-wells at-:707 East Yosemite Avenue, Mant ca, California (the site). <br /> INTRODUCTION/RACKGROUND <br /> Three two-inch diameter groundwater monitoring we s (MW 1 through MW3)-located at the site <br /> were part of a subsurface investigation of the form r underground storage tank (UST) area. <br /> Monitoring-well MW 1 was installed to a maximum'-depth of 29 feet below surface grade (bsg) and <br /> MW2 and MW3 were installed_ to maximum"depths f 30 feet bsg:.The monitoring wells .were <br /> installed using-8-inch.diameter hollow stem augers.. The location of the site is illustrated in Figure <br /> 1. A site plan is illustrated in Figure 2. In accordance with the San Joaquin County Environmental <br /> Health Department (EHD):requirements, all wells mi 't be properly destroyed to:obtain final site <br /> closure. The well locations are illustrated on Figure 2. <br /> -' 'PROCEDURES . <br /> Each well will be over-drilled to"at least 1 foot below the total boring depth utilizing a-CME-75.drill <br /> rig equipped with 8-iricli diameter hollow stem augers d subsequently backfilled with neat cement. <br /> The grout mixture will consist o_fType 1/11 portland neat cement and notmo e.than:6 gallons of water <br /> per-94-pound sack of cement. <br /> 837 Shaw Road,Sfocktori,C lifornia 95215 <br /> Telephone-(209)467-1006 F (209)467-1118 <br />