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California Regional Water IWhrd 3 ' <br /> QU; Central Valley Region <br /> Robert Schneider,Chair 03 MAR 20 PM 12: 52 �01 <br /> Winston H.Hickox Gray Davis <br /> Secretary for Sacramento Main Office Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> March 18, 2003 <br /> Former Busy Bee Cleaners <br /> c/o Mr. Joseph Salazar, Jr., Attorney at Law <br /> Mayall,Hurley, Knutsen, Smith and Green <br /> 2453 Grand Canal Blvd., Second Floor <br /> Stockton, CA 95207-8253 <br /> PHASE 2 GROUNDWATER CHARACTERIZATION WORK PLAN AND UPGRADIENT SITE <br /> CHARACTERIZATION WORKPLAN, FORMER BUSY BEE CLEANERS;SAN JOA QUIN <br /> COUNTY <br /> We have reviewed your submittals entitled"Phase 2 Groundwater Characterization Workplan"and <br /> "Upgradient Site Characterization Workplan, City of Lodi Parks and Recreation Facility"both of which <br /> are dated January 30,2003 and prepared by E2C Remediation. Our comments on the documents are <br /> provided below. <br /> Phase 2 Groundwater Characterization Work Plan <br /> We concur with work proposed the Phase 2 Groundwater Characterization Work Plan to install four <br /> shallow monitoring wells. The boring for the downgradient well will be advanced to 90 feet below <br /> ground surface for the collection of"grab" groundwater sample to evaluate VOC contamination in the <br /> deeper groundwater zone. <br /> The work plan also indicates that a fifth monitoring well will be installed at a yet-to-be-determined <br /> location if the groundwater sample from downgradient well exceeds a PCE concentration of 20 <br /> micrograms per liter. We may also request another downgradient well if the hydrographs constructed <br /> from the measured water levels in the new wells indicates that the downgradient well is not properly <br /> positioned so as to be directly downgradient from the contaminant release area. <br /> Upgradient Site Characterization Work Plan <br /> The groundwater sample from boring C-52, adjacent to the City of Lodi Parks and Recreation Facility <br /> (PRF), contained PCE at 1 microgram/liter. This data point is insufficient to demonstrate that there have <br /> been contaminant releases from the PRF that may have an effect on Busy Bee's remedial efforts. <br /> We have reviewed the investigation scope and methodologies presented in the work plan and concur that <br /> California Environmental Protection Agency <br /> �a�Recycled Paper <br />