HomeMy WebLinkAbout1620 e brundage _envirotech report 6.22.20_9-126Report of Waste Discharge
June 2020 Page 6
3.5 SOIL DESCRIPTION
According to the United States Department of Agriculture Natural Resources Conservation
Service (NRCS), the soil under the Coles facility is identified as Panache-Urban land-Cajon
complex (map unit symbol: 216) with 0 to 2 percent slopes. There is up to 5 percent calcium
carbonate in the soil profile. The salinity is classified as non-saline to very slightly saline (0.0 to
2.0 mmhos/cm).
The soil is described as well-drained with low runoff. The capacity of the most limiting layer to
transmit water (ksat) was identified at moderately high to high with a rate of 0.57 to 1.98 in/hr.
There are no soil sample locations at the Coles facility but the subsurface is described below:
• Ap — 0 to 16 inches: clay loam
• C — 16 to 60 inches: loam
The NRCS soil map is shown in Figure 6. A soil report from the NRCS is in Attachment 4.
3.6 WATER SUPPLY SOURCES
A list and map showing the location of water wells located within a one-mile radius of the two
ponds are located in Figure 7. The result of the water well survey identified fifteen water wells
within the AOR. Of the fifteen wells within the AOR, two are irrigation, two are municipal, one is
domestic, one monitoring, and one is Vadose Zone Monitoring. The well list presented in Figure
6 describes each well by Public Land Survey System (Section, Township, Range), well. ID, year
of completion, well type, location, hole size, casing size and depth, casing material, gravel pack
depth, gravel pack hole size, gravel size, perforation intervals, total well depth, and depth to water
at drill date. The water well survey information presented in Figure 6 was collected from several
public agencies, including the California Department of Water Resources Records, the Kern
County Environmental Health, LAMA GeoTracker, and the California Statewide Groundwater
Elevation Monitoring (CASGEM).
3.7 TOPOGRAPHY
The Coles facility is located in central Kern County, CA, south of the Kern River. Kern County is
located southeast of the center of the San Joaquin Valley, a broad basin east of the Temblor
Range and west of the Sierra Nevada. The ground surface elevation at the facility is approximately
390 -feet above mean sea level. Drainage trends westward from the Sierra Nevadas to the center
of the San Joaquin Valley.
3.8 GEOLOGY
The sedimentary units of the San Joaquin Valley represent continuous marine sedimentation in
the center of the basin flanked by cyclical transgressive and regressive marine deposits
influenced by the tectonic events to the west that sealed off the basin. The marine deposits are
unconformably overlain by Quaternary lacustrine deposits. The stratigraphy within the Coles
facility, from oldest to youngest, is represented by the Miocene Fruitvale Formation, Miocene
Santa Margarita Formation, Miocene to Pliocene Chanac Formation, Pliocene Etchegoin
Formation, Pliocene Kern River Formation, and Holocene Alluvium. The geologic structure in the
area lies on a southwest-dipping homocline, formed along the southern hinge of the Bakersfield
arch and Sierran uplift.
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