DERR-2024-004309

State of Utah
SPENCER 1. COX
Governor
DEIDRE HENDERSON
Lieutenant Governor
Department of
Environmental Quality
Kimberly D. Shelley
Executive Director
DIVISION OF ENVIRONMENTAL
RESPONSE AND REMEDIATION
Brent H . Everett
Director
February 7, 2024
ERRL-0038-24
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
Darnen Burnham, Redevelopment Manager
Community and Economic Development
2549 Washington Boulevard, Suite 420
Ogden, Utah 84401
Re: Release File Review
Former Super Sonic Carwash, located at 2534 South Wall Avenue, Ogden, Utah
Facility Identification No. 1200607, Release Site MJG
Dear Mr. Burnham:
The Division of Environmental Response and Remediation (DERR) completed its review
of Ogden City Redevelopment Agency's (RDA) May 2023 and October 2023, Limited Subsurface
Investigation reports, submitted to the DERR on December 26, 2023, by Wasatch Environmental,
for the above-referenced facility. The review also included soil and groundwater data from 2008
through 2014, from multiple site studies, and information about an underground storage tank (UST)
closure (2008) and soil excavation work (2009).
The review indicates that in-place soil and groundwater contamination remains exceeding
DERR' s Initial Screening Level (ISL) cleanup standard.
Conclusions drawn from the DERR review are :
1. Groundwater impacts from total petroleum hydrocarbons, diesel range organics
(TPH-DRO) and or total petroleum hydrocarbons, gasoline range organics (TPH-
GRO) are above the ISL, and remain near direct-push sample GP-4 (April 2023),
and GP-2, GP-3, GP-4, GP-5, GP-7, and GP-12 (August 2023). Your submitted
reports and historic information show that the impacted groundwater from about
10-14 feet below grade (bg), does not have its limits defined, and currently consists
of a plume approximately 75' by 45' with a historic gradient of 0.0015 feet/foot and
a flow direction of north-northeast, last measured, September 2008.
2. Soil contamination above the ISL remains in-place for TPH-DRO and or TPH-GRO
near direct-push samples GP-2, GP-3, GP-4 and GP-12 (August 2023). Historic and
current data indicates the petroleum affected soil is from about 9-14' bg. The lateral
195 North 1950 West• Salt Lake City, UT
Mailing Address: P .O . Box 144840 • Salt Lake City, UT 84114-4840
Telephone [phone] • Fax [phone] • T.D.D . [phone]
www.deq.utah.gov
Printed on I 00% recycled paper
Facility ID# 1200607
Page2
extent of contamination is not fully defined and the vertical extent of contamination
is not defined, with several samples showing petroleum contamination at 14' bg.
Therefore, more work is needed before a site cleanup plan can be considered, or that of a
site management plan prior to RDA's planned residential community. The DERR requires the
following work, including the installation of groundwater monitoring wells (MWs) and a regime of
groundwater monitoring:
1. Obtain representative soil samples from soil borings that define the lateral and
vertical extent of contamination at the release site. Samples collected shall be
analyzed for:
[x] Diesel and Gasoline: TPH-DRO, TPH-GRO, Benzene, Toluene, Ethyl-
benzene, Xylene and Naphthalene.
2. Obtain representative groundwater samples that define the lateral extent of
contamination at the release site. Samples collected shall be analyzed for:
[x] Diesel and Gasoline: TPH-DRO, TPH-GRO, Benzene, Toluene, Ethyl-
benzene, Xylene and Naphthalene.
3. Install groundwater MWs, as needed to define the plume limits, and commence a
quarterly groundwater monitoring program for at least two quarters. Samples
collected shall be analyzed for:
[x] Diesel and Gasoline: TPH-DRO, TPH-GRO, Benzene, Toluene, Ethyl-
benzene, Xylene and Naphthalene.
4. Provide a properly scaled drawing of the site, North indicated, showing the location
of the former UST system(s), historic excavation boundaries, underground utility
locations, property lines, surrounding properties and land use, the location and
depths of soil and groundwater samples collected, and tabulated data with laboratory
data sheets and chain of custody forms.
According to Utah Code R311-202, the DERR requires that RDA initiate its subsurface
studies within 90 days of receipt of this letter, and submit a report of findings including first quarter
groundwater information within 180 days of receipt of this letter.
If you have any questions regarding this matter, please contact Mark Crim, the DERR
project manager, at [phone].
Sincerely,
Brent H. Everett, Director
Division of Environmental Response and Remediation
BHE/MEC/rr
cc: Brian Cowan, B.S., M.P.H., Director, Weber-Morgan Health Department
Blake Downey, P.G., Wasatch Environmental
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Community & Economic Development
ATTN : Darnen Burnham
2549 Washington Blvd., Ste. #420
Oqden, UT 84401
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