DD: Phase I ESA & Phase II ESAs: SW Topeka Boulevard
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Phase I & Phase II ESAs: SW Topeka Boulevard



Emily Smart


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Project Summary

Blackstone Environmental, Inc., (Blackstone) completed Phase I Environmental Site Assessment (Phase I ESA) and Phase II ESAs for the property located on SW Topeka Boulevard in Topeka, Kansas.

The approximate 0.52-acre Site is a commercial property consisting of two single story buildings. The Shawnee County parcel reports indicated that the two commercial structures were built in 1951. Based on the city directory review, historical occupants of the subject Site included a phone repair shop, a financial group, a custom motorcycle company, several pool supply companies, a flooring company, a copy center, several auto supply stores, a shoe store, a tavern, and an oil & gas station. The presence of a historical gas station at the Site was not identified by the EDR Report or in the Kansas Department of Health and Environment (KDHE) Tanks or Kansas Environmental Interest Finder (KEIF) databases. Information provided by the current owner of the property did not indicate the previous use of the Site as a gas station.

Based on the historical use sources reviewed, the Phase I ESA identified one REC associated with historic use of the subject Site. Blackstone developed a scope of work for environmental sampling based on the REC identified in Phase I ESA and in general accordance with ASTM Standard E1903 - 11 Standard Practice for Environmental Site Assessments: Phase II Environmental Site Assessment Process (Ref. 1). Five soil borings were drilled and sampled during Phase II ESA activities. Groundwater was encountered in three of the five soil borings. Six soil samples and three groundwater samples were collected from the soil borings and were submitted for the analysis of contaminants of concern (COCs) including volatile organic compounds (VOCs) including benzene, toluene, ethylbenzene, total xylenes, methyl tert-butyl either (MtBE), ethylene dibromide (EDB), and 1,2 dichloroethane (1,2-DCA), total petroleum hydrocarbons (TPH) low range hydrocarbons (LRH), mid-range hydrocarbons (MRH), and high range hydrocarbons (HRH), polycyclic aromatic hydrocarbons (PAHs), and lead.

Several COCs were detected above non-residential Risk-Based Standard for Kansas (RSK) in the soil and groundwater samples. The analytical results of the sampling conducted as part of the Phase II ESA did not indicate gross or widespread petroleum contamination; however the results confirmed the historic use of the site for petroleum sales is a REC, as identified in the Phase I ESA.

Blackstone worked with our client to prepare an application for a Certificate of Environmental Liability Release (CELR) for submittal to KDHE. The application was approved and the sale of the property was completed.