Laserfiche WebLink
l <br /> laboratory method detection limits from vapor sampling will be input into the model to evaluate <br /> the Hazard Quotient for carcinogens and non-carcinogens. Analytes of interest not detected will <br /> be input into the model using the lowest'applicable laboratory method detection limit. For the <br /> purpose of this indoor air risk assessment, ATC will assume the building is slab on grade. ATC <br /> will compare Hazard:Quotient Ratios to conservative and action levels established by the SF <br /> RWQCB and evaluate if additional sampling, modeling, and/or mitigation efforts are necessary. <br /> Report Preparation <br /> Upon completion of the soil vapor study activities,'a summary report will be prepared and will <br /> include a description of field activities, laboratory analytical data in tabular form, boring logs, site <br /> pians, laboratory report sheets, a comparison of soil vapor analytical data to the RWQCB San <br /> Francisco Bay Region ESLs, CHHSLs, and any additional modeling, if necessary. <br /> Projected Schedule <br /> Once approval of this workplan has been received, ATC will confirm a schedule for drilling <br /> activities. ATC will notify the SJCEHD at least 48 hours prior to beginning any field activities. <br /> The summary report will, be submitted to the SJCEHD approximately 45 days following the <br /> completion of all field activities. <br /> i <br /> Please contact our office at (209) 579-2221 if you require additional information. <br /> Respectfully submitted, <br /> ATC Associates Inc. <br /> Jim Kundert <br /> Staff Geologist <br /> ist 4ESSlp �: <br /> g <br /> NN <br /> . `�,� JCAE 1 .. <br /> HOM�I `! <br /> 4 Z5 <br /> Jeanne Hornsey, F.E. Na 604741;0 m <br /> > Exp:4-z 3t olr Z.17 ., , <br /> CA Professional Engineer No. 47410 . iz . <br /> Attachments <br /> F F <br /> 1. <br /> 4F.GAI. <br /> cc: Ms..Lori Shields, Diesel Performance <br /> Mr.'Jim Barton, RWQCB <br /> f <br /> I$ SoilGasWorkPlan.doc 5 ATC Associates Inc. <br /> E <br />