1434 e. commerce and 323 idaho - The City of San Antonio

STERLING PROPERTY (1434 E. COMMERCE AND 323 IDAHO)
Phase I Environmental Site Assessment
5.2.2 Closed Landfill Inventory
According to Alamo Area Council of Governments (AACOG) Closed
Landfill Inventory Map, there are no inactive/active landfills within a ½-
mile radius of the subject site.
5.3 Physical Setting Sources
The San Antonio East, Texas 2010 United States Geological Survey (USGS)
(Exhibit 6) was used to determine the physical setting of the subject site. Review
of the topographic map indicates the subject site is relatively flat with area
drainage flowing to the southwest towards the San Antonio River.
5.3.1 Surface Soil Characteristics
According to the Bexar County Soil Survey, the soil on the subject
property is classified as follows:
Soil Classification
Houston Black clay, terrace, 1 to
3% slopes (HtB)
Permeability
Rate
Slow
Corrosion Potential on
Unprotected Steel Pipe
Very High
5.3.2 Surface Geological Characterization
The subject site is located near the southern edge of the Balcones Fault
Zone. The Balcones Fault Zone separates the relatively horizontal strata
of the Edwards Plateau toward the northwest from the more steeply
dipping strata of the Gulf of Mexico Basin toward the southeast. All faults
have been inactive since the Miocene Epoch approximately 13 million
years before present. San Antonio is located in a zone of low seismic
hazard. The geologic units in central Bexar County range in age from
Lower Cretaceous to Upper Cretaceous. The Lower Cretaceous units
include the Glen Rose Limestone, the Edwards Group, and the
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