Dissolved Phase Sites in Kentucky

Client:                      Environmental Consulting Firm

Type of Facility:     Service Station

Location:                 Clay City, Kentucky

Thirteen 8-hour EFR^® events were conducted from November 13, 1999 to August 6, 2003 to reduce dissolved-phase petroleum hydrocarbon concentrations in four monitor wells.  Benzene levels were reduced to below allowable limits and “no further action” was issued for the site.

 

Client:                      Environmental Consulting Firm

Type of Facility:      Service Station

Location:                 Simpsonville, Kentucky

Seventeen 8-hour EFR^® events were conducted at a site to remediate soils and reduce dissolved-phase petroleum hydrocarbon concentrations.  Average benzene concentrations (three years of sampling prior to EFR^®) were detected above “Allowable Levels” in two wells (MW-3 and MW-4) prior to EFR^®® analytical results show average benzene reductions of 71% and 97%.  Benzene levels were reduced to “below detection limits” in both wells after five and eleven events, respectively.  Post EFR analytical results show average benzene reductions of 71% and 97%.

 

Client:                      Environmental Consulting Firm

Type of Facility:      Former Service Station

Location:                 Lexington, Kentucky

One 8-hour EFR^® event was conducted at a site to reduce dissolved-phase petroleum hydrocarbon concentrations below action levels in one monitor well.  “No further action” was issued for the site.

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Cecelia, Kentucky

After approximately four years of site monitoring, three 8-hour EFR^® events were performed at a site to reduce dissolved hydrocarbon concentrations in two monitor wells.  “No Further Action” was issued for the site.

 

Client:                      Environmental Consulting Firm

Type of Facility:     Former Service Station

Location:                 Campbellsville, Kentucky

Eight 8-hour EFR^® events were conducted from December 17, 1999 to July 30, 2002 at a site where an active groundwater pump and treatment system had been operating for a period of years.  Prior to the initial event, SPH was detected in one monitor well at a thickness of 0.20 feet.  SPH has not been detected since the completion of the first EFR^® event.  Benzene has been below “allowable levels” in 14 out of the last 18 sampling events.  Currently all wells are below “allowable levels”. 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Winchester, Kentucky

Four 8-hour EFR^® events were performed at a site to reduce dissolved hydrocarbon concentrations in two monitor wells.  Benzene concentrations were reduced to BDL in both wells and “no further action” was issued for the site.

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Louisville, Kentucky

Sixteen EFR^® events were conducted to reduce benzene concentrations in three monitor wells (MW-1, MW-4, and MW-7).  Sixteen events utilizing MW-1 reduced average benzene concentrations (four quarters prior to EFR^®) from 874 ug/l to 260 ug/l (post EFR^® sampling).  Four of the EFR^® events utilizing MW-4 reduced average benzene concentrations from 201 ug/l (10 quarters prior to EFR^®) to 81 ug/l (post EFR^® sampling).  Nine of the EFR^® events utilizing MW-7 reduced average benzene concentrations (four quarters prior to EFR^®) from 158 ug/l to 40 ug/l (post (four quarters prior to EFR^®).

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Louisville, Kentucky

Eight EFR^® events were conducted at two monitor wells (MW-2 and MW-6) from September 11, 2001 to November 10, 2004 to reduce dissolved benzene concentrations.  EFR^® reduced average benzene concentrations of 306 ug/l (MW-2) and 302 ug/l (MW-6) prior to EFR^® (three sampling quarters) to 84 ug/l (MW-2) and 20 ug/l (MW-6) following EFR^® (13 sampling quarters).

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 La Grange, Kentucky

Three EFR^® events were conducted from June 26, 2008 to August 26, 2008 to reduce dissolved benzene concentrations in one monitor well (MW-4R). Average benzene concentrations in MW-4R were reduced from 438 ug/l (thee years of quarterly sampling prior to EFR^®) to 81 ug/l (four quarters following EFR^®).

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Lebanon, Kentucky

Seven EFR^® events were conducted from February 21, 2003 to September 23, 2008 at four monitor wells to reduce dissolved benzene concentrations. Average benzene concentration reductions can be seen in the following table.  Eight sampling rounds (three years prior to EFR^®) and three post EFR^® sampling rounds in 2008 and 2009 were used to calculate the average benzene concentrations.

	MW-1	MW-2	MW-4	MW-9
Prior to EFR®	1,808 ug/l	4,524 ug/l	14,262 ug/l	135 ug/l
Post EFR®	14.6 ug/l	920 ug/l	143 ug/l	54 ug/l

 

Client:                      Environmental Consulting Firm

Type of Facility:      Convenient Station

Location:                 Liberty, Kentucky

Seven EFR^® events were conducted from October 31, 2002 to July 27, 2004 to reduce dissolved benzene concentrations in one monitor well (MW-4). Average benzene concentrations in MW-4R were reduced from 1,012 ug/l (thee years of quarterly sampling prior to EFR^®) to 467 ug/l (four quarters following EFR^®).  “No further action” was issued for the site after six additional dual-phase extraction events by another provider.