NC-EWDP-9SX SITE SUMMARY
(Datum NAD-83) : 36° 41' 44.567"
North 116° 33' 46.769"
Township 14 S Range 48 E
Section 33 NE 1/4 NE 1/4 1/4
797.30 meters AMSL (2615.8 feet +/-) GPS
Access: Take Highway 95 from the Lathrop Wells
Junction 9.4 miles to the gate on the north side of the highway. Take the gravel road
0.3 miles; turn east.
Purpose: 1) provide lithologic samples of spring deposits; 2) define
valley-fill stratigraphic sequence and groundwater flow paths down-gradient of proposed
repository; and 3) provide water level and water chemistry data.
NC-EWDP-9SX is located on paleospring deposits adjacent to
the wash that drains the south-west flank of Yucca Mountain. The site is located
down-gradient of fractured volcanic rocks that provide a pathway for groundwater flow from
the Yucca Mountain area. The paleospring deposits are of note as these types of
deposits are associated with past climates. The drill site selected is adjacent to
an existing road in an area which has previously been disturbed. The borehole was
drilled and logged to a total depth of 397 feet and completed with four screened intervals
with Westbay sampling and pressure ports in the well casing. Prior to completion, a
48 hour constant discharge test was conducted. Water samples were collected for