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MEMORANDUMHazardous Materials MESA AddendumPREPARED FOR:CH2M HillPREPARED BY:Pinyon Environmental Engineering Resources, Inc.COPIES:PROJECT:US 6 and Wadsworth Boulevard Interchange EnvironmentalAssessmentDATE:April 17, 2009, updated June 12, 2009SUBJECT:MESA SupplementThe purpose of this supplemental assessment was to perform an evaluation for the potentialpresence of hazardous and/or toxic materials (otherwise known as Recognized EnvironmentalConditions) at the Site properties which may be acquired for the US 6th Avenue andWadsworth Boulevard Interchange project, based on the properties mapped in Appendix A. AModified Environmental Site Assessment (MESA) was completed in April 2008 by Pinyon, andupdated information contained in that report was based on a Site reconnaissance of the Siteproperties on April 8, 2008. The information contained in this Addendum is based on newinformation and supplements the original tech memo.Pinyon completed a survey of the Site addresses on April 8, 2009, by driving to the listedproperties and noting the current Site use. Some possible historical uses were also noted. Allobservations were from public right of ways or publically accessible parking lots. Thefollowing table (Table 1) lists the property, the current use, any potential recognizedenvironmental conditions (RECs) based on current or known historical uses, and arecommendation for additional work, if necessary. Table 1 lists all of the full acquisitions andthe partial acquisitions with RECs. The properties with RECs are mapped in Figure 1 andshown in detail on the project atlas included at the end of this document.Prior to a total acquisition of any property, Pinyon recommends completing an ASTMcompliant Phase I Environmental Site Assessment (ESA). The completion of a compliant PhaseI ESA is required for the ESA user to qualify for the innocent landowner, contiguous propertyowner, or bona fide prospective purchaser liability protection in the ComprehensiveEnvironmental Response, Compensation, and Liability Act (CERCLA).1
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work RecommendedFull AcquisitionsWadsworth Boulevard495 WadsworthCircle S Mini Mart659 WadsworthNational InsuranceCenters, Hot ShotInfrared InspectionsMulti-suite officebuilding, with tenantsJackson Hewitt TaxService, Ace CashExpressBlaze ConstructionCompany (office)699 Wadsworth700 Wadsworth710 WadsworthResidential715 WadsworthDiamond Shamrockgas station720 Wadsworth730 WadsworthGas Station sinceat least 1965, openLUST (akaBoonshaw Gas)UnknownYPhase I ESA prior to acquisition, review on-going monitoringreports to evaluate the need for a Phase II ESA. Currentowner/operator responsible for remediation.NPhase I ESA prior to acquisition.7-Eleven GasStation from atleast 1965 until2002YSite has been issued closure by OPS, tanks removed from thesite in 2002. Review reports identify what levels of residualcontamination remain in the soil. Phase I ESA prior toacquisition.Appears to be aformer residence(site visit04/08/09)UnknownNPhase I ESA prior to acquisition.NPhase I ESA prior to acquisition.YReview on-going monitoring reports to evaluate the need fora Phase II ESA. Phase I ESA prior to acquisition. Currentowner/operator responsible for remediation.ResidentialGas station since2000, open LUST(aka WesternConvenience)UnknownNPhase I ESA prior to acquisition.ResidentialUnknownNPhase I ESA prior to acquisition.2
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work Recommended777 WadsworthEmerald Cash, BailBonds Office, LiquorStoreTaco BellLakewood Muffler &BrakeUnknownNPhase I ESA prior to acquisition.UnknownUnknownNYPhase I ESA prior to acquisition.Phase I ESA prior to acquisition, Phase II ESA likely required.840 Wadsworth1000Wadsworth1190/1180WadsworthEnterprise Rent A CarUnknownNNo fueling or repair activities on site; rental counter andoffices only. Phase I ESA prior to acquisition.1204WadsworthWeeds Thrift StoreNPhase I ESA prior to acquisition.1355WadsworthVacant (formerlyNatural Health)Looks to be aformer residence(site visit04/08/09)Looks to be aformer residence(site visit04/08/09)NPhase I ESA prior to acquisition.UnknownNPhase I ESA prior to acquisition.6th Avenue Frontage Road7717 6th AvenueFrontage RoadOffice Building:Northwest RespiratoryService, SunshineBuilding Maintenance,Supply Efficient, TotalTelco, Colorado Logos,Inc., Moulton ClaimService, Horn BrothersRoofing, AppliedPower Industrial Sales3
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work RecommendedSpecialists7707 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7443 6th AvenueFrontage RoadVacantUnknownNPhase I ESA prior to acquisition.7433 6th AvenueFrontage RoadResidence and vacantparcelUnknownNPhase I ESA prior to acquisition.7423 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7395 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7430 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7420 6th AvenueFrontage RoadErid House - AAClubhouseLooks to be aformer residence(site visit04/08/09)NPhase I ESA prior to acquisition.4
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work Recommended7400 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7390 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisition.7950 6th AvenueFrontage RoadResidenceUnknownNPhase I ESA prior to acquisitionWesternGas station, openConvenience/Diamond LUST. CurrentlyShamrockundergoing aCorrective ActionPlan for cleanupYReview on-going monitoring reports to evaluate the need fora Phase II ESA. Phase I ESA prior to acquisition. Currentowner/operator responsible for remediation.7504 BroadviewDriveVacant, former streetUnknownNPhase I ESA prior to acquisition.7405 BroadviewDriveDriveway for 700WadsworthUnknownNPhase I ESA prior to acquisition.7504 BroadviewDriveVacant/former Street,parking for 710WadsworthUnknownNPhase I ESA prior to acquisition.Vacant, pouredfoundationLooks to be aformer residence(site visitNPhase I ESA prior to acquisition.13th Avenue7603 West 13thAvenueBroadview DriveHighland Drive7525 HighlandDrive5
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work RecommendedUnknownNPhase I ESA prior to acquisition.04/08/09)Webster Street594 WebsterStreetResidenceParcels with no associated address49-023-14-004VacantUnknownNPhase I ESA prior to acquisition.49-024-12-0005VacantUnknownNPhase I ESA prior to acquisition.49-023-00-118VacantUnknownNPhase I ESA prior to acquisition.49-023-00-064VacantUnknownNPhase I ESA prior to acquisition.Partial Acquisitions with RECs IdentifiedWadsworth Boulevard395 WadsworthGrease MonkeyUnknownY401 WadsworthMerchants OilY440 WadsworthWal Mart (with WalMart Service Center)Beauty CollegeLUST report (akaBradley)UnknownYBeauty CollegeY441 WadsworthPhase I ESA prior to acquisition. A Phase II ESA may also berequired.Phase I ESA prior to acquisition. Review on-going monitoringreports to evaluate the need for a Phase II ESA.Phase I ESA prior to acquisition. A Phase II ESA may also berequired.Phase I ESA prior to acquisition. A Phase II ESA may also berequired.6
Table 1Summary of Environmental ConcernsPropertyAddressCurrent UseHistorical Use (ifavailable)RECY/NAdditional Work Recommended815 WadsworthLongs Peak EquipmentUnknownY820 WadsworthU-HaulUnknownY829 and 831WadsworthFlings AutoRepair/CorvetteSpecialistsUnknownYPhase I ESA prior to acquisition. A Phase II ESA may also berequired.Phase I ESA prior to acquisition. A Phase II ESA may also berequired.Phase I ESA prior to acquisition. A Phase II will likely berequired.845 WadsworthJensen’s FlowersYPhase I ESA prior to acquisition. Review reports for closedLUST; a Phase II ESA may also be required.1080Wadsworth1225WadsworthCar WashPine Cove GreenHouse – closedLUSTUnknownYUnoccupied site,formerly a BeautyCollegeUnknownYPhase I ESA prior to acquisition. A Phase II ESA may also berequired.Phase I ESA prior to acquisition. A Phase II ESA may also berequired.1251WadsworthMotorcycle/ScooterSales, possibly serviceon-SiteUnknownYPhase I ESA prior to acquisition. A Phase II ESA may also berequired.Summit Lakewood(Brick Sales)Former motorcyclesales (and possiblerepair)YPhase I ESA prior to acquisition. A Phase II ESA may also berequired.5th Avenue7576 W. 5thAvenueNotes:YNYesNo7
Figure 1-Sites with the Potential to Impact the Project8
#SITES THE PROJECT HAS A POTENTIALTO IMPACT564321Page 9
#SITES THE PROJECT HAS A POTENTIALTO IMPACT12119108Page 107
#SITES THE PROJECT HAS A POTENTIALTO IMPACT17161514Page 1113
#SITES THE PROJECT HAS A POTENTIALTO IMPACTPage 12
Page 13#SITES THE PROJECT HAS A POTENTIALTO IMPACT
Service, Horn Brothers Roofing, Applied Power Industria
