transaction screen - denver e1528-14 transaction screen questionnaire national western stock show...

Transaction Screen National Western Complex Redevelopment

Environmental Quality Project Number: 2015-BRN-JOB-0001 Fund/Organization/Account Number: 78100/6506200/600400

Contract Number: ENVHL-201207453-00

March 13, 2015 Terracon Project No. 25157711

Prepared for: City and County Denver

Department of Environmental Health Division of Environmental Quality

Denver, Colorado

Prepared by: Terracon Consultants, Inc.

Wheat Ridge, Colorado

March 13, 2015 Department of Environmental Health Division of Environmental Quality 200 West 14th Avenue, Department 310 Denver, Colorado 80202 Attn: David Wilmoth, P.E., P.G. P: (720) 865-5438 [email protected] Re: Modified Transaction Screen

National Western Complex Redevelopment Property Environmental Quality Project Number: 2015-BRN-JOB-0001 Fund/Organization/Account Number: 78100/6506200/600400 Contract Number: ENVHL-201207453-00 Terracon Project No. 25157711

Dear Mr. Wilmoth: Terracon has completed a Modified Transaction Screen (MTS) of the above-referenced property performed in accordance with our proposal dated January 12, 2015, and American Society for Testing and Materials (ASTM) E1528-14, Standard Practice for Limited Environmental Due Diligence: Transaction Screen Process. This MTS is based on a visit to the property by Terracon personnel to only those parcels identified as accessible by the client, questionnaires completed by an the property owner and/or occupant of the facility (only to those owners and occupants identified to receive the questionnaires by the client), Terracons review of an environmental database report provided by Environmental Data Resources, Inc. (EDR), and Terracons review of historical Sanborn maps, aerial photographs and three prior reports for portions of the site that were provided to Terracon by the client. As noted above, the site visits and questionnaires were not completed for the private parcels, thus the scope is modified from the ASTM standard. In addition, other scope considerations that deviate the ASTM standard were utilized in the preparation of this MTS. Terracon globally recommends Phase I Environmental Site Assessment for each address/parcel with the site polygon prior to acquisition or development. Site Reconnaissance Celeste M. McCoy and Diana L. Carr of Terracon conducted the site visit on February 11, 2015. The property consists of approximately 300 acres of land developed with industrial, residential, and commercial facilities. Ron Rohr, Vice President of Administration, escorted Terracon to the facilities owned by the National Western Stock Show and provided information regarding current

ASTM E1528-14 Transaction Screen Questionnaire National Western Stock Show Redevelopment Denver, Colorado March 13, 2015 Terracon Project No. 25157711

and historical site operations. The site is bisected by three railroads and mainly consists of stock yards, parking lots, and arenas. Terracon observed one gasoline aboveground storage tank (AST) and one diesel AST, located at both 1101 East 46th Avenue and 5012 Packing House Road (2 ASTs at each property). In addition, an automotive repair facility located in the northern portion of the site (5012 Packing House Road) services a fleet of tractors and maintenance vehicles. According to Mr. Rohr, the repair facility has no hydraulic lifts and performs standard repair operations including oil and hydraulic oil changes and parts replacements. PECs identified during the site reconnaissance and affirmative answers from the owner/occupant questionnaires are discussed in Table 1. A water recycling facility was observed at 4701 Packing House Road. According to Mr. Rohr, he does not have knowledge regarding operations at the facility, which is owned by McDonald Farms. Based on the readily available information, Terracon is unaware of the exact processes of the water recycling facility. Water recycling, in and of itself, is not a PEC, and it is unclear from where the water comes from at this time. Terracon recommends that if a Phase I Environmental Site Assessment is completed for this facility that a detailed synopsis of the processes of this facility is completed. Adjoining Properties The property is adjoined to the north by industrial facilities (5100, 5120, 5140, and 5150 Race, and 5151 Franklin Street), to the east by multiple industrial facilities (4901, 5001 Race Street, 4800 High Street, 4400, 4900, 4910, 4980, 5040 Brighton Boulevard), and residential homes, to the south by industrial facilities (2060 38th Street and 3801, 4101, 4301, 4303, 4375 Brighton Boulevard), and to the west by the South Platte River, followed by multiple industrial facilities. Vasquez Boulevard and I-70 Operable Units 1 and 2 The site is located within the boundaries of the Vasquez Boulevard and I-70 Superfund site, specifically within Operable Unit 1 (OU1) Residential Soils and Operable Unit 2 (OU2) Omaha and Grant Smelter. OU1 According to the United States Environmental Protection Agency (USEPA), soil samples have been collected and analyzed for arsenic and lead at 4,500 homes or approximately 99 percent of the homes within the National Priority Listing (NPL) OU1 polygon. The USEPA completed removing and replacing contaminated soils on approximately 18 percent of the 4,500 homes that had actionable levels of arsenic and/or lead. The USEPA placed institutional controls on one percent of those homes (or approximately 69 homes) where access for sampling was not feasible. The controls are in-place to provide protection to those individuals living in the area, both present residential tenants and future residential tenants.


Terracon contacted Paula Schmittdiel, Remedial Project Manager, with the USEPA Region 8 regarding USEPA soil sampling for residential properties located within the site polygon. Terracon submitted 54 addresses to the USEPA for review. According to the USEPA, 12 of the addresses were included in the USEPA study, three of which required removal of arsenic and/or lead contaminated soils (4660 Baldwin Court, 4681 Baldwin Court, and 4727 Brighton Boulevard). None of the above-referenced 69 homes were located on the site.

Addresses Sampled within the Site Boundary by USEPA for Lead and Arsenic

Address Soil Sampled Removal Required

Removal Complete

Arsenic Concentration

(mg/kg)

Lead Concentration

(mg/kg) 4656 BALDWIN CT Yes No N/A 22 387

4660 BALDWIN CT Yes Yes 2004 30 501 4665 BALDWIN CT Yes No N/A 6 384

4667 BALDWIN CT Yes No N/A 7 303

4681 BALDWIN CT Yes Yes 2006 16 897 4709 BRIGHTON BLVD

Yes No N/A 7 280


4717 BRIGHTON BLVD

Yes No N/A

39 396

4727 BRIGHTON BLVD

Yes Yes 2004 17 445

4741 BRIGHTON BLVD

Yes No N/A

10 380


4772 BALDWIN CT Yes No N/A 26 268 The USEPA action level for arsenic is 70 mg/kg and the lead action level is 400 mg/kg. Three of the addresses located on the property exceeded the action level for lead; however, none of the properties exceeded the action level for arsenic. The remaining addresses submitted to the USEPA were not zoned for residential purposes or the address was not in the USEPA database. According to the USEPAs second five-year review report (September 2014), the residential portion of Vasquez Boulevard and I-70 Superfund site (OU1), is protective for human health and the environment. However, official deletion from the Superfund NPL has not been completed.


OU2 According the USPEA, the Omaha and Grant Smelter was located in the area outlined within the OU2 polygon and operated from 1882 until 1903. The facility was demolished in the early 20th century. The smoke stack remained and was used to incinerate municipal waste from 1933 to 1945. The smoke stack was demolished around 1950. The USPEA, State of Colorado, and the City and County of Denver (CCoD) are investigating OU2 for potential heavy metals in the facilitys environmental media as part of a proposed upgrade to the areas drainage. Terracon reviewed the Feasibility Summary for Redevelopment of the Denver Coliseum: Environmental Condition and Remediation Estimates report dated November 2013. In addition to the findings outlined below, the report summarizes the immediate surrounding areas known environmental concerns and projects that will impact the facility. Additionally, the potential remedial costs are discussed in the report.

Superfund Site The Denver Coliseum facility has been studied extensively as it is part of OU2. The historical studies indicate that the facility has petroleum hydrocarbons in the

soils, metals (arsenic and lead in the soil, and municipal solid waste and building debris/urban fill) in the soil.

The Concept is to remove approximately 30,000 cubic yards (cy) from the areas impacted by arsenic and lead contaminated soil and urban fill

The historical location of the smelter (the footprint of the historical structure) was partially located beneath the existing Denver Coliseum. The soils beneath the existing structure are potentially contaminated with arsenic and/or lead and may contain urban fill.

Urban Fill Historical investigations in the coliseum parking lot have identified urban fill

debris, including bricks, fly ash, wood and municipal solid waste. Historical investigations in the parking lot have identified asbestos in the soil,

polyaromatic hydrocarbons (PAHs), and explosive levels of methane in soil vapor.

Groundwater Five groundwater monitoring wells were installed to collect and analyze

groundwater for contaminates. Additional wells may be installed in the future for quarterly sampling of the

facilitys groundwater.


Metals (arsenic and/or lead), chlorinated hydrocarbons, PAHs, and lubricating oils and greases were detected in the samples collected, some of which exceed the State of Colorado groundwater standards.

Groundwater was encountered at nine feet to 12.5 feet below ground surface. Regulated Building Materials Regulated building materials are believed to exist in the Denver Coliseum

structure. Asbestos Containing Building Materials (ACBMs) were identified during a 1998

asbestos survey. Based on the review of the reports regarding OU1 and OU2, the facility listings pertaining to the Vasquez Boulevard and I-70 Superfund site is a PEC. Historical Review Terracon reviewed the historical Sanborn maps and historical aerial photographs to identify PECs associated with the site. Historical fire insurance maps produced by the Sanborn Map Company were requested from EDR to evaluate past uses and relevant characteristics of the site and surrounding properties. EDR provided Sanborn maps and the information obtained from the historical aerial photography is summarized in Table 1. Terracon reviewed the EDR reports Physical Setting Source Summary, for the presence of water wells in the Primary Study Area (PSA). Based on the information reviewed, approximately 60 monitoring wells were identified within PSA, excluding monitoring wells listed as abandoned. Additionally, six industrial wells are listed in the PSA. Domestic and commercial wells were excluded due to the nature of use. Injection wells were not specifically listed in the report, and were therefore not identified during the review. Terracon recommends contacting the USEPA Underground Injection Control (UIC) Division to obtain UIC permits issued for locations within the PSA. Domestic water well locations should also be evaluated if impacted groundwater (chemical of concern concentrations greater than regulatory standards) is identified during subsurface investigations. To assist the client with PECs identified during the historical review, Terracon has provided a discussion of the operations conducted on-site, and the significance of the related processes with respect to potential environmental impacts.

Animal processing/rendering facilities: Rendering is a process in which waste animal tissue is converted to, or rendered into useful products, such as lard, tallow, and meat and bone meal. The rendering process can be done a number of ways, but consists of separating fatty materials from proteins and water. These processes generate a protein and water sludge, which can be further utilized for inedible rendering (not fit for human


consumption), or sent to a wastewater treatment plant. Additional wastes generated by rendering include air emissions from volatile organic compounds (VOCs), such as organic sulfides. Depending on the animals rendered at the facility, other wastes, such as blood, carcasses, feathers, and particulate matter, may have been generated. There is the possibility that these wastes were not properly disposed, and may exist at the site. The potential for impacts associated with these processes include worker safety, such as contact with wastes, putrescence, and odors. The rendering facilities present a PEC.

Railroads: Potential impacts from railroad uses include fuel spills, hazardous waste and/or materials, herbicide use around the rail spurs to prevent vegetative growth, heavy metals from coal spillage and railroad beds, and creosote leachate (toxic) from railroad ties.

Building demolition: Based on the numerous facilities historically represent on the site,

there is the possibility that demolition debris from the buildings exists in the sites soil. As such, asbestos-containing materials and lead-based paint products are a concern. An additional concern with ACBMs is the thermal system insulation (TSI), such as pipe wrapping for boiler systems. These materials are generally friable, and present a risk for inhalation of asbestos fibers, and for asbestos fibers in soils.

Petroleum storage: Petroleum storage tanks, such as gasoline tanks, underground storage tanks (USTs) and oil sheds/houses present an environmental concern, due to the potential for leaks and spills to the surface and subsurface soils. Oil houses are related to railroads for fueling and maintenance purposes. Based on the readily available information, the contents, quantities and storage methods are unknown. The oil house presents a PEC. The USTs related to the residential and commercial facilities for fueling and/or heating purposes are typically given a GT designation or gasoline tanks on Sanborn maps. Heating oil tanks were not identified in the Sanborn maps reviewed, nor are they regulated with the Colorado Department of Labor and Employment Division of Oil and Public Safety (CDLE-OPS).

Landfilling: Potential landfilling concerns include methane gas, hazardous materials and petroleum products, building demolition debris (asbestos and lead-based paint), and geotechnical concerns associated with the decay of matter relating to compression issues (see rendering discussion above).


If the user is different from the preparer(s), the user shall sign below affirming that the completed questionnaire has been received. It is the users responsibility to draw conclusions regarding affirmative or unknown answers. ______________________________________ ____________________ Users Signature Date General Comments The user is advised that this MTS is not intended to identify recognized environmental conditions associated with the property and will not satisfy the practices that constitute All Appropriate Inquiries into the previous ownership and uses of the property consistent with good commercial or customary practice as defined in 42 U.S.C. 9601(35)(B) to establish the Comprehensive Environmental Response, Compensation and Liability Act Landowner Liability Protections. This MTS report has been prepared for the exclusive use and reliance of the City and County of Denver (Client). Use or reliance by any other party is prohibited without the written authorization of the Client and Terracon. Reliance on the MTS by the Client and all authorized parties will be subject to the terms, conditions and limitations stated in the proposal, MTS report, our agreement dated October 30, 2012, amended on September 10, 2013 and our task order dated January 14, 2015. This report represents our service to you as of the report date and constitutes our draft document. Certain indicators of the presence of hazardous substances or petroleum products may have been latent, inaccessible, unobservable or not present during the most recent reconnaissance and may subsequently become observable (such as after property renovation or development). Further, these services are not to be construed as legal interpretation or advice.

Appendix A

Table 1 Summary of FindingsNational Western Complex Redevelopment

Figure 1 Site Map

Task # NWSS Map Designation Address(es)PECs identified during the site visit and/or

questionnaireUses commonly associated as PECs

(Sanborns)Uses commonly associated as PECs

(Aerials)Recommendations Additional Comment

1 D, E, F and AK1101 East 46th Avenue, 4665 HumboldtStreet (E&F), 1400 East 47th Avenue

Pole mounted transformers in theassociated parking lots (map designationsD, E, F and AK), One 500-gallon diesel andone 500-gallon gasoline AST (mapdesignation D), 55-gallon drums of kitchenwaste grease,emergency generators withASTs, transformers throughout thebuilding, pad-mounted transformersoutside of the building (map designation E)

Demo of structures between 1951and 1968

Several buildings demo'd between1970 and 1977; additional buildingdemo'd between 1988 and 1991

Area D: SB, SVP, ExistingMW Area E: SVP Area F:MW, SVP Area AK: SBSoil: VOCs, TPH, RCRA8+Zinc, PACM GW: VOCs,Dissolved RCRA 8+Zinc, SoilVapor: VOCs, Methane

None

2 10, 11, 12 and 134701, 4709, 4717, & 4727 Brighton

BoulevardNone Oil house

Tree canopy prevents determinationof on-site structures

Located on privateproperty. To be addressedby proposed MW-06

None

3 25 and 26900 East 48th Avenue, 4647 Packing HouseRoad

None None None None None

4 29, 30 Includes 334680 Packing House Road, 4700 PackingHouse Road, 33 - no address

NoneGas tank; no Sanborn coverage formap designation 29

One building, located along therailroad tracks in map designation30, was demolished between 1977and 1984. Map designation 29appeared undeveloped from at least1937 until approximately 1984 whenthe current structure is present - noRECs.

Located on privateproperty. To be addressedby sampling existinggroundwater monitoringwell (if access granted).

No Sanborn map coverage atall for map designation 29

5 5 4601 Franklin Street None None None None None

6 A, B, and C901 East 46th Avenue, 1301 East 46thAvenue (B&C)

A current water recycling facilty in theadjoining property to the north (confirmedas the former rendering plant noted inSanborn review). Mr. Rohr has noknowledge regarding operations at thefacility, which is owned by McDonaldFarms. Off-site soils are stockpiled on-sitefor use by the National Western StockShow (map designation A)

Slaughter house, rendering plant

Demolition of two large structures inmap designation A between 1984and 1988; small structures alsonoted in B & C, which appear to betemporary or semi-truck trailers

Area A: SB, MW, TP, SVPArea B: SVP Area C: SB Soil:RCRA 8 +Zinc, PACM, GW:VOCs, Dissolved RCRA8+Zinc, Nitrates Soil Vapor:VOCs, Methane

None

7 BM Includes BN 4701 Packing House Road

A current water recycling plant in theadjoining property to the south which wasconfirmed as the former rendering plantnoted in Sanborn review

Slaughter house, rendering plant,lard refinery, fertilizer operations,animal blood processing, gas tank,auto repair, misc. concrete USTstorage, demo of structure between1951 and 1968

Demolition of the on-site structuresbetween 1970 and 1977; appearsundeveloped in 1977 and utilized forstorage or parking in 1984.

Area BM: MW, SVP AreaBN: TP, 2-SB, Soil: VOCs,TPH, RCRA 8+Zinc, PACMGW: VOCs, Dissolved RCRA8+Zinc, Nitrates Soil Vapor:VOCs, Methane

Unspecified "basement"(assumed UST) large concretestorage. Visible from aerialand sanborns

Responsive Resourceful Reliable MW= Monitoring Well, SVP = Soil Vapor Point, SB=Soil Boring, TP = Test Pit 1 of 6





8 AL, AM, AN, AO, AP, AQ and BH

4700 Humboldt Street, 4700 LafayetteStreet (AM & AN), 1515 East 47th Avenue,4775 Baldwin Court, 4785 Baldwin Court,4700 Franklin Street

Emergency generators with associatedASTs (map designation AL), transformersthroughout the building (map designationAL and AO), pad-mounted transformersoutside of the building (map designationAL), pole mounted transformers in theassociated parking lots, confirmedadjoining former automotive repair facilitynoted in Sanborn review

Several auto and truck repairfacilities, camper bodymanufacturing, gasoline tanks,railroad, demo of structuresbetween 1903 and 1929, 1929 and1951, and 1951 and 1968

Demolition of several commercial-sized structures in map designationsAL, AM, and AN between 1970 and1984; numerous residential andsmall commercial structuresappeared demolished between 1970and 1984 in map designations AOand AP (tree canopy preventsdetailed assessment of area)

Area AL: MW, SVP AreaAM: 2-SB, Area AN: TP AreaAO: MW Area AP: MWSoil: VOCs, TPH, RCRA8+Zinc, PACM GW: VOCs,Dissolved RCRA 8+Zinc SoilVapor: VOCs, Methane

None

9 BJ, BK, BL, and BO4800, 4875, 5000, 5010, & 5012 PackingHouse Road

Currently an automotive repair shop with:storage of small amounts ofpaints/chemicals, 55-gallon drums ofoil/used oil/hydraulic fluid, and one 1,000gallon diesel and one 1,000 gallon gasolineAST; manure storage (map designation BO),pole-mounted transformers throughoutassociated parking lots and paddock areas,a building previously used an automotiverepair facility (map designation BJ),adjoining properties currently have awindshield wiper fluid manufacturer andpreviously had a biofuel refinery andrubber tire manufacturer

None None

Area BJ: SB, MW, TP, 2-SVPsArea BK: SB, TP Area BL:Existing MW, SB, SVP AreaBO: MW, SB, TP, 2-SVPsSoil: VOCs, TPH, RCRA8+Zinc, PACM GW: VOCs,Dissolved RCRA 8+Zinc,Nitrates Soil Vapor: VOCs,Methane

None

10 BC, BD, BE, BF, BG4701 Brighton Boulevard, 4701 & 4801Franklin Street, 4799 & 4900 BrightonBoulevard

Pole-mounted transformers throughoutassociated parking lots, confirmed as theformer slaughter house and renderingplant noted in Sanborn review, adjoiningproperty to the east was formerly agarbage collection facility with anautomotive repair facility

Slaughter house, rendering plant,fertilizer storage, eight iron (steel) oilASTs, auto repair, demo of structuresbetween 1903 and 1921

None

Areas BC, BD, BE, BG: NAArea BF: MW, 2-SB, TP, 3-SVPs Soil: VOCs, TPH, RCRA8+Zinc, PACM GW: VOCs,Dissolved RCRA 8+Zinc, SoilVapor: VOCs, Methane

None

11 6 5125 Race Court None Railroad None None None12 7 5130 Franklin Street None Railroad None None None

13 35 5131 Race Court

Prior and current industrial use (site andadjoining), prior landfill (site and adjoining),prior existence of hazardous/petroleumproducts, Prior existence of environmentalviolations, prior ESA indicating RECs,multiple unknown responses

Railroad None None None

14 17 5135 Race Court NoneRailroad, railroad spur, manuredump platform

Demolition of northern-moststructure in map designation 28between 1977 and 1984

Located on privateproperty

None

15 22 5115 Race Court None None None None None16 15 5100 Race Court None Railroad None None None






17 28, BS, and BT5185 & 5000 Packing House Road, 5125Franklin Street

Prior and current industrial use (site andadjoining), prior landfill (site and adjoining),prior existence of hazardous/petroleumproducts, prior ESA indicating RECs,multiple unknown responses

Railroad, auto facility, fertilizerfacility, auto repair, demo ofstructures between 1929 and 1951

None

Areas BS & BT: City ROWMW Soil: VOCs, TPH, RCRA8+Zinc, PACM, GW: VOCsDissolved RCRA 8+Zinc,Nitrates

None

18 9 5055 West River Drive None Animal blood processing, Railroad NoneLocated on privateproperty

None

19 BQ 4701 Packing House Road None See task 53 None None None20 4 5001 Packing House Road None None None None Near railroads to southeast

21 37 5000 Packing House Road

Prior and current industrial use (site andadjoining), prior landfill (site and adjoining),prior existence of hazardous/petroleumproducts, prior ESA indicating RECs, priorexistence of environmental violations,multiple unknown responses


22 39 and 40Owned by NWSS, DRIIR owns the Right-of-Way

None Railroad None None None

23 BR 5001 River Drive

Prior industrial use (site and adjoining),prior landfill (site and adjoining) , priorexistence of hazardous/petroleumproducts, prior ESA indicating RECs,multiple unknown responses

Railroad None NoneCurrent above-ground sewagepipes

24 21 4877 Packing House Road None RailroadDemolition of the western portion ofthe southern building between 1970and 1977


None

25 24 4747 Packing House Road None Railroad None None None

26 27 4701 Packing House Road

Prior industrial use (site and adjoining),prior landfill (site and adjoining) , priorexistence of hazardous/petroleumproducts, prior ESA indicating RECs,multiple unknown responses

Railroad, slaughter house NoneLocated on privateproperty

None

27 G, H, J, S, T, U, V, W, and X4654 & 4638 Humboldt Street, 4632Franklin Street; 4639, 4655, 4601, 4671,4679, and 4695 Franklin Street

Pole-mounted transformers throughoutassociated parking lots

Auto repair, oil shed, demo ofstructures between 1903 and 1929,1929 and 1951, and 1951 and 1968

Demolition of numerous structuresin map designations G & H between1970 and 1984; potential foradditional demolition on remainingmap designations (tree canopyprevents detailed assessment of thearea)

Area G: SB Soil: VOCs, TPH,RCRA 8+Zinc, PACM None






28 I, K, and O1300 East 46th Avenue, 4619 & 4631Franklin Street

None

Gasoline tanks on south/southwestadjoining, solvent/oil blended tankon south adjoining, demo ofstructures between 1903 and 1929,and 1929 and 1951

Demolition of at least one structurein map designation K between 1970and 1984; demolition of onestructure in map designation Ibetween 1984 and 1988; potentialfor additional demo in mapdesignation O (tree canopy preventdetailed assessment of the area)

Area K: SB Soil: VOCs, TPH,RCRA 8, PACM None

29 31 4645 Franklin Street None None

Potential for demo of a structurebetween 1970 and 1984 (treecanopy prevent detailed assessmentof the area)


None

30 M, P 4611 Baldwin Court, 4638 Franklin Street None

Oil shed (also located in mapdesignation L in another year), autorepair, demo of structures between1929 and 1951, and 1951 and 1968

Potential for demo of structuresbetween 1970 and 1984 (treecanopy prevent detailed assessmentof the area)

To be addressed by SB-03located in area K

None

31 AA, AB, AC, AD, Y and Z4658 & 4600 Franklin Street, 4643 & 4655Baldwin Court, 4644 & 4650 Franklin Street Pole-mounted transformers throughout

associated parking lots

Demo of structures between 1929and 1951, and 1951 and 1968


Area AB: SVP, MW AreaAD: TP Soil: VOCs, TPH,RCRA 8+Zinc, PACM GW:VOCs, Dissolved RCRA8+Zinc

None

32 AH (includes AG, AI) and AI 4647 & 4655 Brighton Boulevard NoneAuto repair, demo of structuresbetween 1903 and 1929, and 1951and 1968


GPR Survey/2 Test Pits Current above ground piping

33 AE 4665 Baldwin Court None None


GPR Survey/Test Pit None

34 AF 4646 Baldwin Court Pole-mounted transformers throughoutassociated parking lots

None


Structures appear tounderneath roadway

None

35 1 1650 East 47th Avenue NoneDemo of structures between 1929and 1951

NoneLocated on privateproperty

None

36 34 4656 Baldwin Court None NoneTree canopy prevents determinationof on-site structures

None None

37 32 1670 East 47th Avenue NoneGas tank, demo of structuresbetween 1903 and 1929, 1929 and1951, and 1951 and 1968.


None

38 19 4681 Baldwin Court None None None None None39 14 1632 East 47th Avenue Dry Cleaner None None Monitoring well in AB None

40 8 4667 Baldwin Court None NonePre 1954 building demo'ed between1963 and 1984


None






41 AS, AT, AU, AV, AW, AX, AY, AZ, and BB4716, 4744, 4764, 4770, 1772, 4778, &4780 Baldwin Court; 4731 & 4701 BrightonBoulevard

Pole-mounted transformers throughoutassociated parking lots, adjoining propertypreviously an automotive repair facility Demo of structures between 1903

and 1929, and 1951 and 1968

Pre 1954 buildings in mapdesignators AY, AX, AW, AV, and AUwere demo'ed by 1999 and pre 1970building in map designator demo'edbetween 1984 and 1991

GPR Survey/2 Test pits None

42 AR 1655 East 47th Avenue

Pole-mounted transformers throughoutassociated parking lots, a building withknown asbestos containing material (mapdesignation AR)

None None None None

43 AJ 4661 Brighton Boulevard

Pole-mounted transformers throughoutassociated parking lots, adjoining propertyis currently a petroleum station

Demo of structures between 1903and 1929, and 1951 and 1968

Pre 1954 building demo'ed. Due totree canopy, date of demo can onlybe narrowed down to before 2005.

GPR Survey/Test Pit None

44 BA 4751 Brighton Boulevard None

Auto repair/auto wrecking on site;auto repair/filling station on eastadjoining, demo of structuresbetween 1929 and 1951

Tree canopy prevents determinationof on-site structures

Area BA: MW, SVP Soil:VOCs, TPH, RCRA 8+Zinc,PACM GW: VOCs, DissolvedRCRA 8+Zinc, Nitrates SoilVapor: VOCs, Methane

None

45 16 4712 Baldwin Court None NonePre 1953 building was demo'edbetween 1970 and 1984.


None

46 L 4600 Franklin Street None

Oil shed (also located in mapdesignation J in another year), demoof structures between 1929 and1951

None Soil Vapor Point None

47 36 4800 Brighton Boulevard None

Truck repair and landfill on site;junked cars on south adjoining,demo of structures between 1951and 1968

None

Located on privateproperty. Soil VaporPoints SV-11 and SV-12positioned inferreddowngradient

None

48 2 4699 Marion Street None Garage None None None49 3 5000 Packing House Road None None None None Near railroads to southeast50 BW and BX 4600 Franklin Street None None None None None51 BU and BV 4701 & 4700 Baldwin Court None None None None None52 BI 4850 Brighton Boulevard None None None None None

53 BQ 4701 Packing House Road

Confirmed as the slaughter house noted inSanborn reviewed, adjoining properties arewindshield wiping fluid manufacturer andautomotive repair facility

Railroad, machine shop, oil room,engine room, fertilizer dryer, lardrefinery and slaughter house

Pre 1937 building demo'ed between1984 and 1991.

Area BQ: MW, SB, TP, 2-SVPs Soil: VOCs, TPH, RCRA8+Zinc, PACM GW: VOCs,Dissolved RCRA 8+Zinc,Nitrates Soil Vapor: VOCs,Methane

None

54 BP 5100 Packing House Road

Pole-mounted transformers throughoutassociated parking lots, currently adjoiningproperties are industrial, historicallyadjoining properties were slaughter house,automotive repair and landfill







55 23 4741 Brighton Boulevard NoneDemo of structures between 1903and 1929, and 1951 and 1968


None

56 20 4660 Baldwin Court None None None None None

57 N Includes 3 parcels 4625 Baldwin Court NoneAuto body repair, demo of structuresbetween 1903 and 1929, 1929 and1951, and 1951 and 1968

NoneGroundwater Monitoringwell

Filling station to the east(1929, 1951), auto repair toeast (1929, 1951, 1968)

58 SA, SB, SC, SD, SE, SF, SG, SH, SI, SJ, SK

4600 Humboldt Street, 1300 E 44thAvenue, 801 E 45th Avenue, 3801 ArkinsCourt, 900 East 46th Avenue, 700 East 46thAvenue, 3901 Arkins Court

Prior industrial use (site), prior and currentindustrial use (adjoining), prior landfill (siteand adjoining) , prior ASTs/USTs, priorpresence of waste treatment/disposal,prior and current existence ofhazardous/petroleum products, priorexistence of environmental violations, priorESA indicating RECs, prior hazardoussubstances/petroleum dumping above-grade, multiple unknown responses

Wood and coal yard NoneProperty located south ofI-70

None

59 SL, SM, SN, SO, SP, SQ, SR, SS, ST, SU, SV

1500 East 46th Avenue, 1610 East 46thAvenue, 1670 East 46th Avenue, 1686 East46th Avenue, 4435 Brighton Boulevard,4501 Brighton Boulevard, 4415 BrightonBoulevard

NoneASTs, oil and grease warehouse, oilstorage buildings

Pre 1953 buildings were demo'edbetween 1994 and 1999

Property located south ofI-70

None

60 SW 5040 Baldwin CourtAppears to be a salvage yard (1970-present)

Located outside ofprimary study area

Historical landfill identified ingoogle maps overlay


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!(19!(14

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Former Biofuel Refinary

Currently Automotive/Tractor Repair

Lard Refinary

Garage

Lard Refinery

Wood and Coal Yard

Garage

Fertilizer

Slaughter House

Garage

Auto Repair

Killing Building

Engine Room

Rendering

Slaughter House ExtensionRendering

Automotive House

Truck Repair

Rendering

Rendering

Filling Station

Truck Repair

Fertilizer Dryer

Fertilizer

Garage and Truck Repair

Auto Repair

Machine Shops

Auto Repair

Formerly Manufactured Rubber

Slaugher House Extension

Animal Processing

Slaughter Operation

Animal Processing

Rendering Plant

Auto Repair

Blood Processing

Animal Processing

Truck Repair

Manure Dump Platform

Truck Repair

Fertilizer Warehouse and Facility

Truck and Tire Repair

Auto Repair

Camper Body Manufacturing

Drycleaner

Fertilizer Storage

Oil Room

Coal Storage

Automotive Repair

Auto Repair

Auto Repair

Oil Storage

Filling Station

Paints and OilOil Storage

Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS, AEX,Getmapping, Aerogrid, IGN, IGP, swisstopo, and the GIS User Community

FILE NAME: FINAL DRAFT REV 5

DATA SOURCES:

0 400 800200Feet

25157010

MMT

MEW

March 2015

Project No.:

Drawn By:

Checked By:

Date:PH. (303) 423-3300 terracon.com

10625 FRONTAGE RD., STE 3 WHEAT RIDGE, CO

FIGURE

01

FIGURE 1POTENTIAL ENVIRONMENTAL CONCERNSNATIONAL WESTERN COMPLEX

REDEVELOPMENT PROJECTVARIOUS ADDRESSESDENVER, COLORADO

Legend!P

Current Above GroundStorage Tanks

!PCurrent Above GroundGrease Drums

!PCurrent NWSS ManurePile

!P Historical Gas Tank

!PHistorical Oil StorageTanks

Current Buildings Areasof Concern

Historical Buildings Areasof Concern

Historic Fill Area

Primary Study AreaBoundary

Secondary Study AreaBoundary

Parcel TypePrimary Study AreaParcels

Owner-Occupied Parcels

Parcels Not-Owner-Occupied

Railroad Properties

Property IdentifierNumbers = PrivateParcelsLetters = CCOD andNWSS Parcels

Appendix B

Questionnaires Completed by CCoD Personnelfor CCoD Facilities/Parcels

ASTM E1528-14 Transaction Screen Questionnaire for Owner/Occupant 5000 Packing House Road Denver, CO

Responsive Resourceful Reliable 1

Questions Owner

Occupant (if applicable)

Yes No Unk Yes No Unk 1a. Is the property used for an industrial use? 1b. Is any adjoining property used for an

industrial use?

2a. Did you observe evidence or do you have any prior knowledge that the property has been used for an industrial use in the past?

2b. Did you observe evidence or do you have any prior knowledge that any adjoining property has been used for an industrial use in the past?

3a. Is the property used as a gasoline station, motor repair facility, commercial printing facility, dry cleaners, photo developing laboratory, junkyard or landfill, or as a waste treatment, storage, disposal, processing, or recycling facility (if applicable, identify which)?

3b. Is any adjoining property used as a gasoline station, motor repair facility, commercial printing facility, dry cleaners, photo developing laboratory, junkyard or landfill, or as a waste treatment, storage, disposal, processing, or recycling facility (if applicable, identify which)?

4a. Did you observe evidence or do you have any prior knowledge that the property has been used as a gasoline station, motor repair facility, commercial printing facility, dry cleaners, photo developing laboratory, junkyard or landfill, or as a waste treatment, storage, disposal, processing, or recycling facility (if applicable, identify which)?

4b. Did you observe evidence or do you have any prior knowledge that any adjoining property has been used as a gasoline station, motor repair facility, commercial printing facility, dry cleaners, photo developing laboratory, junkyard or landfill, or as a waste treatment, storage, disposal, processing, or recycling facility (if applicable, identify which)?



Questions Owner


Yes No Unk Yes No Unk 5a. Are there currently any damaged or

discarded automotive or industrial batteries, pesticides, paints, or other chemicals in individual containers of >5 gal (19 L) in volume or 50 gal (190 L) in the aggregate, stored on or used at the property or at the facility?

5b. Did you observe evidence or do you have any prior knowledge that there have been previously any damaged or discarded automotive or industrial batteries, or pesticides, paints, or other chemicals in individual containers of >5 gal (19 L) in volume or 50 gal (190 L) in the aggregate, stored on or used at the property or at the facility?

6a. Are there currently any industrial drums (typically 55 gal [208 L]) or sacks of chemicals located on the property or at the facility?

6b. Did you observe evidence or do you have any prior knowledge that there have been previously any industrial drums (typically 55 gal [208 L]) or sacks of chemicals located on the property or at the facility?

7a. Did you observe evidence or do you have any prior knowledge that fill dirt has been brought onto the property that originated from a contaminated site?

7b. Did you observe evidence or do you have any prior knowledge that fill dirt has been brought onto the property that is of an unknown origin?

8a. Are there currently any pits, ponds, or lagoons located on the property in connection with waste treatment or waste disposal?

8b. Did you observe evidence or do you have any prior knowledge that there have been previously, any pits, ponds, or lagoons located on the property in connection with waste treatment or waste disposal?

9a. Is there currently any stained soil on the property?



Questions Owner


Yes No Unk Yes No Unk 9b. Did you observe evidence or do you have

any prior knowledge that there has been previously, any stained soil on the property?

10a. Are there currently any registered or unregistered storage tanks (above or underground) located on the property?

10b. Did you observe evidence or do you have any prior knowledge that there have been previously, any registered or unregistered storage tanks (above or underground) located on the property?

11a. Are there currently any vent pipes, fill pipes, or access ways indicating a fill pipe protruding from the ground on the property or adjacent to any structure located on the property?

11b. Did you observe evidence or do you have any prior knowledge that there have been previously, any vent pipes, fill pipes, or access ways indicating a fill pipe protruding from the ground on the property or adjacent to any structure located on the property?

12a. Is there currently evidence of leaks, spills or staining by substances other than water, or foul odors, associated with any flooring, drains, walls, ceilings, or exposed grounds on the property?

12b. Did you observe evidence or do you have any prior knowledge that there have been previously any leaks, spills or staining by substances other than water, or foul odors, associated with any flooring drains, walls, ceilings or exposed grounds on the property?

13a. If the property is served by a private well or non-public water system, is there evidence or do you have prior knowledge that contaminants have been identified in the well or system that exceed guidelines applicable to the water system?

13b. If the property is served by a private well or non-public water system, is there evidence or do you have prior knowledge that the well has been designated as contaminated by any government environmental / health agency?



Questions Owner


Yes No Unk Yes No Unk 14. Does the owner or occupant of the property

have any knowledge of environmental liens or governmental notification relating to past or recurrent violations of environmental laws with respect to the property or any facility located on the property?

15a. Has the owner or occupant of the property been informed of the past existence of hazardous substances or petroleum products with respect to the property or any facility located on the property?

15b. Has the owner or occupant of the property been informed of the current existence of hazardous substances or petroleum products with respect to the property or any facility located on the property?

15c. Has the owner or occupant of the property been informed of the past existence of environmental violations with respect to the property or any facility located on the property?

15d. Has the owner or occupant of the property been informed of the current existence of environmental violations with respect to the property or any facility located on the property?

16. Does the owner or occupant of the property have any knowledge of any environmental site assessment of the property or facility that indicated the presence of hazardous substances or petroleum products on, or contamination of, the property or recommended further assessment of the property?

17. Does the owner or occupant of the property know of any past, threatened, or pending lawsuits or administrative proceedings concerning a release or threatened release of any hazardous substance or petroleum products involving the property by any owner or occupant of the property?



Questions Owner


Yes No Unk Yes No Unk 18a. Does the property discharge waste-water (not

including sanitary waste or storm water) onto or adjacent to the property and/or into a storm sewer system?

18b. Does the property discharge waste-water (not including sanitary waste or storm water) onto or adjacent to the property and/or into a sanitary sewer system?

19. Did you observe evidence or do you have any prior knowledge that any hazardous substances or petroleum products, unidentified waste materials, tires, automotive or industrial batteries, or any other waste materials have been dumped above grade, buried, and/or burned on the property?

20. Is there a transformer, capacitor, or any hydraulic equipment for which there are any records indicating the presence of PCBs?



Transaction Screen Questionnaire answers were provided by the following persons: Owner Questions Name: Agatha Linger Title: Environmental Analyst Firm: City and County of Denver Address: 200 W. 14th Avenue, Denver CO 80204 Phone Number: 720.865.5356 Date: 2/3/15 Role(s) at the property: NA

Number of years at the property: 0 Relationship to user (for example, principal, employee, agent, consultant):

Employee

Occupant Questions Property Occupied at time of site visit: Yes No Occupant / Firm Name: Responders Name: Title:

Address: Phone Number: Date: Role(s) at the property: Number of years at the property: Relationship to user (for example, principal, employee, agent, consultant):

ASTM E1528-14 Transaction Screen Questionnaire for Owner/Occupant 5001 River Drive Denver, CO


Questions Owner



industrial use?









Questions Owner
















Employee



ASTM E1528-14 Transaction Screen Questionnaire for Owner/Occupant 5125 Franklin Street Denver, CO


Questions Owner



industrial use?









Questions Owner
















Employee





Questions Owner



industrial use?









Questions Owner
















Employee



ASTM E1528-14 Transaction Screen Questionnaire for Owner/Occupant

5001 River Drive Denver, CO


Questions

Owner

Occupant

(if applicable)

Yes No Unk Yes No Unk

1a. Is the property used for an industrial use?

1b. Is any adjoining property used for an

industrial use?

2a. Did you observe evidence or do you have

any prior knowledge that the property has

been used for an industrial use in the past?

2b. Did you observe evidence or do you have

any prior knowledge that any adjoining

property has been used for an industrial use

in the past?

3a. Is the property used as a gasoline station,

motor repair facility, commercial printing

facility, dry cleaners, photo developing

laboratory, junkyard or landfill, or as a waste

treatment, storage, disposal, processing, or

recycling facility (if applicable, identify

which)?

3b. Is any adjoining property used as a gasoline

station, motor repair facility, commercial

printing facility, dry cleaners, photo

developing laboratory, junkyard or landfill, or

as a waste treatment, storage, disposal,

processing, or recycling facility (if applicable,

identify which)?


any prior knowledge that the property has

been used as a gasoline station, motor repair

facility, commercial printing facility, dry

cleaners, photo developing laboratory,

junkyard or landfill, or as a waste treatment,

storage, disposal, processing, or recycling

facility (if applicable, identify which)?


any prior knowledge that any adjoining

property has been used as a gasoline station,

motor repair facility, commercial printing

facility, dry cleaners, photo developing

laboratory, junkyard or landfill, or as a waste

treatment, storage, disposal, processing, or

recycling facility (if applicable, identify

which)?




Questions

Owner

Occupant

(if applicable)


5a. Are there currently any damaged or

discarded automotive or industrial batteries,

pesticides, paints, or other chemicals in

individual containers of >5 gal (19 L) in

volume or 50 gal (190 L) in the aggregate,

stored on or used at the property or at the

facility?


any prior knowledge that there have been

previously any damaged or discarded

automotive or industrial batteries, or

pesticides, paints, or other chemicals in

individual containers of >5 gal (19 L) in

volume or 50 gal (190 L) in the aggregate,

stored on or used at the property or at the

facility?

6a. Are there currently any industrial drums

(typically 55 gal [208 L]) or sacks of

chemicals located on the property or at the

facility?



previously any industrial drums (typically 55

gal [208 L]) or sacks of chemicals located on

the property or at the facility?


any prior knowledge that fill dirt has been

brought onto the property that originated from

a contaminated site?


any prior knowledge that fill dirt has been

brought onto the property that is of an

unknown origin?

8a. Are there currently any pits, ponds, or

lagoons located on the property in connection

with waste treatment or waste disposal?



previously, any pits, ponds, or lagoons

located on the property in connection with

waste treatment or waste disposal?

9a. Is there currently any stained soil on the

property?




Questions

Owner

Occupant

(if applicable)



any prior knowledge that there has been

previously, any stained soil on the property?

10a. Are there currently any registered or

unregistered storage tanks (above or

underground) located on the property?



previously, any registered or unregistered

storage tanks (above or underground)

located on the property?

11a. Are there currently any vent pipes, fill pipes,

or access ways indicating a fill pipe

protruding from the ground on the property or

adjacent to any structure located on the

property?



previously, any vent pipes, fill pipes, or

access ways indicating a fill pipe protruding

from the ground on the property or adjacent

to any structure located on the property?

12a. Is there currently evidence of leaks, spills or

staining by substances other than water, or

foul odors, associated with any flooring,

drains, walls, ceilings, or exposed grounds on

the property?



previously any leaks, spills or staining by

substances other than water, or foul odors,

associated with any flooring drains, walls,

ceilings or exposed grounds on the property?

13a. If the property is served by a private well or

non-public water system, is there evidence or

do you have prior knowledge that

contaminants have been identified in the well

or system that exceed guidelines applicable

to the water system?

13b. If the property is served by a private well or

non-public water system, is there evidence or

do you have prior knowledge that the well

has been designated as contaminated by any

government environmental / health agency?




Questions

Owner

Occupant

(if applicable)


14. Does the owner or occupant of the property

have any knowledge of environmental liens

or governmental notification relating to past

or recurrent violations of environmental laws

with respect to the property or any facility


15a. Has the owner or occupant of the property

been informed of the past existence of

hazardous substances or petroleum products



15b. Has the owner or occupant of the property

been informed of the current existence of

hazardous substances or petroleum products



15c. Has the owner or occupant of the property

been informed of the past existence of

environmental violations with respect to the

property or any facility located on the

property?

15d. Has the owner or occupant of the property

been informed of the current existence of

environmental violations with respect to the

property or any facility located on the

property?


have any knowledge of any environmental

site assessment of the property or facility that

indicated the presence of hazardous

substances or petroleum products on, or

contamination of, the property or

recommended further assessment of the

property?


know of any past, threatened, or pending

lawsuits or administrative proceedings

concerning a release or threatened release of

any hazardous substance or petroleum

products involving the property by any owner

or occupant of the property?




Questions

Owner

Occupant

(if applicable)


18a. Does the property discharge waste-water (not

including sanitary waste or storm water) onto

or adjacent to the property and/or into a

storm sewer system?

18b. Does the property discharge waste-water (not

including sanitary

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