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l-ri RCUiondl Recommendation, Page of 24 <br /> \ppendix 1 <br /> • Completing a Quality Assurance! Quality Quality ASSui•arice/Quality Control plan in- <br /> Control plan including chain-of-custociv cludin2 chain-of-custod),•rrocedures for <br /> procedures for'field sampling and analysis. field sampling and analysis. <br /> Shccific to 1110 21'01.111(lWater inyesti2ation. the 3.2 Preliminary Investigation and Evaluatioo Re- <br /> workplan is to include the folloxvine: port (PEER}- §2654. X2723 <br /> • A proposal to complete.a sensitive receptor The soil and groundwater data collected from im- <br /> suryev to SNOW water supply wells and sur-• plementing the Site Investigation Workplan is to be <br /> face eater bodies within 2.0.00 feet of the presented in the:PIER and used'to create the Site; <br /> site. With field observation and verification Conceptual Model. Infonmtion.developed for this <br /> of an\- wells within 500 feet .of the leaking report will be used to determine what additional <br /> underground storage tank site and attempt- xaork is needed at the site. 1-he PIER is to contain: <br /> ing to obtain depth of annular seal for those <br /> wells. Summarized background information devel- <br /> oped.from the Site.Investigation \\%orkplan <br /> • A rationale for installing .m6nitorin2 'veils and results of the completed sensitive recep- <br /> induding \yell location. total depths. screen torSurvey. <br /> intervals. and, P1nnular sea.l depth. " <br /> i "I-he area of investigation is to be accurately <br /> • A Construction diagram for ally proposed delineated on.maps and cross sections to _ <br /> monitoring wells including the well diame- scale to depict the lateral and vertical e.xtem <br /> ier. casing and screen type, annular sealing of impacted soil and gi-ounclwater identified <br /> method ;incl depth. to date. <br /> • d 110 drilling m <br /> method to be implemented and Cross sections must include stratigraphy <br /> decontamination procedures used between based upon boreholes.trenches. +»onitorin2 <br /> borings. wells. or am.:.other supporting. information. <br /> and must shoe+ analytical results and con- <br /> 1-he method,of well'developnient. and the struction details for all monitorin�y wells-to <br /> criteria for selecting the proposed method. demonstrate the degree of impact to ground- <br /> water and site soils. ' <br /> • Disposal plans for soil and purge water. <br /> • Tables summarizing analytical data and j <br /> • Plans for completing a location surrey of the methodologies used to collect and analyze <br /> -installed monitorin(` wells. the samples. <br /> I <br /> • Depth to groundwater. and calculated <br /> Free product measurement method. <br /> groundwate elevation. <br /> Water level measttremet)t:procedtn-e. <br /> • Groundwater quality contoured on a.site <br /> Well purging procedure., map for each groundwater unit investigated. . <br /> • SBmjJle collection prooedure•c. A,graphica[.and narrative site conceptual' <br /> model (SCM)•showing the extent of known <br /> • ,'analytical methods to be used and appropri- soil contamination and groundwater degra- <br /> me detection limits. (Analytical.laboratories dation relative to the leaking USI'system <br /> are to report all peaks idemitied from the, and potential receptors. The SCM should be <br /> S61 and groundwater testing, and provide updated as characterization data becomes <br /> chromatoi2raills as necessary) - available; and used to make determinations. <br /> for future investigations.. <br />