APPCOR10144

• Permit No: C2006085
• IBM Index Class Name: Application Correspondence
• Doc Date: 8/23/2007
• Doc Name: Adequacy Response Letter
• From: EAI Environmental
• To: DRMS
• Media Type: D
• Archive: No

The attached Figure 1 and Appendices 3 through 5 present updated tables and maps based
on current information available in the State's records.
Item 13a (BB): The DBMS noted the presence of alluvial water supply wells included in
the State's records. We have reviewed the State's records and identified various wells
that likely produced alluvial ground water from the Chandler Creek alluvial deposits.
These wells and comments on each well aze provided below.
Permit No. 13763R - Ary -This well is the upstream-most well that we
identified completed in the Chandler Creek alluvium. This well was completed in
1952 to a depth of 20 feet and had a reported production rate of 500 gpm.
However, Northfield's consultants visited the well in 2006 and observed that the
well is not in use and is in a state of disrepair. In addition, Jeanette Bryan, well
inspector with the DWR completed a recent site visit to the well and reported that
it is dry, which suggests that the alluvium is not saturated at this location.
Permit No. 15899 - Ary -This well is reportedly located downstream of the
permit boundary and has reported depth of 50 feet and a reported static water
level of 10 feet. There is no geologic log in the well record, but based on the well
depth, the possibility exists that the well is completed in the Chandler Creek
alluvium.
Permit No. 79354-A -Brown -This well is located downstream of the
Northfield property boundary. The well log indicates that the well penetrated the
sand and gravel to a depth of 30 feet; water was encountered at 30 feet and the
static water level is at 25 feet. This indicates that there maybe 5 feet of saturated
alluvium at this location, but the well is dually completed in the alluvium and
bedrock, and as a result, it is not clear if that water level is representative of the
alluvium or bedrock.
Permit No. 3759-F -Town of Williamsburg -This well is located downstream
of the permit boundary and has a reported depth of 40 feet and a pumping rate of
200 gpm. The depth and pumping rate suggest that the well produces from an
alluvial source. There is no geologic log in the well record, and as a result, the
sediments that the well produces from could not be confirmed.
In our review of well records, we could not identify any wells that cleazly show that there
is production from an alluvial source, but the records referenced above indicate that there
may be an alluvial aquifer present in localized portions of the Chandler Creek alluvium,
although it is our belief that saturated aquifer conditions are not present extensively
throughout the Chandler Creek channel. There may be additional water supply wells
completed in the alluvial aquifer in addition to these referenced above. For example, we
identified wells with no completion details, and those wells were not listed above.
Item 136 (BB): The DRMS requests that if the alluvial system is an aquifer, then wells
constructed in the alluvium should be included in the monitoring program. We propose
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