1. Paper #254799
GEOGENIC CONCENTRATIONS OF SEVENTEEN METALS IN THE TORREY
SANDSTONE, SAN DIEGO, CALIFORNIA
ITRI, Dillon, Environmental and Ocean Sciences, 5998 Alcala Park, San Diego, CA 92110,
dillonitri@sandiego.edu, CATHCART, Eric M., Marine Science and Environmental Studies
Department, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, SCHWABE,
Stephanie J., Rob Palmer Blue Holes Foundation, Rob Palmer Blue Holes Foundation, 3121
Boulder Court, Lexington, KY 40509, and WEIS, Daniel, Advantage Environmental Consultants,
LLC, 145 Vallecitos De Oro, Suite 201, San Marcos, CA 92069
The Embayment area of San Diego County contains 17 recognized formations. The
geogenic metals concentrations within these formations has not been adequately assessed.
In this study, we present the results of over 50 in-situ geogenic soil samples from the Torrey
Sandstone Formation of San Diego, California. All of the soil samples were analyzed for
metals following EPA 6000 / 7000 Series Methods on an ICP Mass Spectrometer. The 95%
UCL for 17 metals was calculated using the statistical software package ProUCL.
The EPA Region 9 Soil Screening Level for Arsenic at residential sites is 0.67 mg/kg. Our
results show the Arsenic concentrations in the Torrey Sandstone exceed this and other
commonly used health risk soil screening levels utilized by many regulatory agencies in
California. Understanding the range of geogenic metals concentrations in sediments
provides crucial information that regulatory agencies need to determine remediation
thresholds.
Additional research is needed to assess the bio-availability of the Arsenic, the potential
impact to human health and the environment, and the impact these results may have on
current regulatory thresholds for assessing soils on residential and commercial properties in
San Diego County. Further research is currently underway to identify the range of
concentrations of metals in additional formations throughout the San Diego Embayment.
Abstract ID#: 254799
Password: 588038
Meeting: Cordilleran Section - 111th Annual Meeting (11–13 May 2015)
Session Type: Theme Sessions
Selection: T.3 Undergraduate Research (Posters)
Title: GEOGENIC CONCENTRATIONS OF SEVENTEEN METALS IN THE TORREY
SANDSTONE, SAN DIEGO, CALIFORNIA
Preferred Presentation Format: Poster
Discipline Categories: Environmental Geoscience Sediments, Clastic
Booth Number:
Abstract Submission Fee: Paid (gsa-2015CD-9774-2576-6857-2168)
First Presenting Author
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2. Presenting Author
Dillon Itri
5998 Alcala Park
Environmental and Ocean Sciences
San Diego, CA 92110
Phone Number: 9496772866
Email: dillonitri@sandiego.edu
Student? Y
Abstract book page: 0
Second Author
Eric M. Cathcart
University of San Diego
5998 Alcala Park
Marine Science and Environmental Studies Department
San Diego, CA 92110
Phone Number: 6192604600
Email: cathcart@sandiego.edu
Student? N
Abstract book page: 0
Third Author
Stephanie J. Schwabe
Rob Palmer Blue Holes Foundation
3121 Boulder Court
Rob Palmer Blue Holes Foundation
Lexington, KY 40509
Phone Number: 843 819 2153
Email: steffi@blueholes.org
Alternate Email: www.blueholes.org
Student? N
Abstract book page: 0
Fourth Author
Daniel Weis
145 Vallecitos De Oro
Suite 201
Advantage Environmental Consultants, LLC
San Marcos, CA 92069
Phone Number: 7607443363
Email: dweis@aec-env.com
Abstract book page: 0
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