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PUBLIC HEALTH SERVICES N <br />' SAN JOAQUIN COUNTY Q ,` <br /> S ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D , M P.H , Health Officer <br />' 304 East Weber Avenue, Third Floor • Stockton, CA 95202 44rFo�ri <br /> 209/468-3420 <br />' PAUL SUPPLE GARY SCANNAVINO <br /> ARCO PRODUCTS COMPANY SCANNAVINO PROPERTIES <br /> P O BOX 6549 5463 CHEROKEE LANE <br /> MORAGA CA 94570 STOCKTON CA 95215 <br /> RE ARCO Station#595 Site Code # 0707 <br />' 6100 N Hwy 99 ti <br /> Stockton CA 95209 <br /> WORK PLAN Work Plan fot \�d nal Site Assessment <br /> DATED November 30,2u 1 i it i DEC <br /> PREPARED BY SECORInternauonal Incorporated {j <br /> ; _ <br />' APPROVED <br /> ED rl <br /> EDEL? Su mit b <br /> lie ADE LATE AND hM SSARY ELEMENTM OF THE WORK PLAN(H&S 25299 37,subd(c)(3)) <br /> 1 Installation of three groundwater monitoring wells to fust water for lateral assessment of the shallow groundwater contaminant <br /> plume in the down-gradient direction from the subject site Selected soil samples will be submitted for analysis Following <br /> completion the wells will be surveyed by a licensed surveyor <br /> 2 Installauon of two soil borings to 100 feet bsg The sod borings will be continuously cored from 50 to 100 feet bsg for geological <br /> profiling No soil samples will be submitted for analysis Discrete groundwater samples will be collected by simulprobe at depths <br />' of 75,90 and 100 feet bsg <br /> 3 Water samples collected with the sunulprobe,and from the monitoring wells following development,will be analyzed for TPF% <br /> (EPA Method 8015rn),BTEX and MtBE (EPA Method 8020)and fuel oxygenates, 1,2-DCA and EDB(EPA Method 8260) <br /> 4 San Joaquin County well installation permits and any necessary encroachment permits and access agreements will be obtained <br />' 5 A report of findings detailing the proposed work will be completed and submitted to PHS/EHD within 60 days following the <br /> completion of all fieldwork <br /> 6 A 500-foot radius door-to-door sensitive receptor survey will be conducted to locate all potential receptors in the area,including <br />' undocumented domestic,irrigation,municipal and industrial wells <br /> MIVIENTS AND CONDITIONS <br />' 1 Shallow groundwater monitoring wells will be completed with a maxnnum of 20 feet of screened casing <br /> 2 Following review of the continuous core soil borings and the analytical data from the sunulprobe mvesugation,deep discretely <br /> screened monitoring wells will be installed <br />' 3 Foity�eight hours notice to PHS/EHD u required prior to initiating fieldwork <br />' DATED k-L 1- too BY «Tl� GL l roi <br /> • n Dun S ru r RENS209 468-0 7 <br /> ' cc Marry Hartzell,CVRWQCB <br /> RustyBenknosky;SECOR <br /> ' A Division of San Joaquin County Health Care Services <br />