1. -. --i II
Water, BUTLER AND EDWARDS ASSOCIATES
/' ECWVED consulting in Hydrogeology and Water Resources Engineering and Manage N dbL
.- "-VC ^Management of Environmental Permit Requirements
S P.O. BOX 23526 TAMPA. FLORIDA 33623 TELEPHONE (813) 876-4006
ju4 8 13 a I'3J;A3 J: A9: 35
RESOURCE EMLATM :
e,.oo eVil. 6le.1983. .
ie Mr. William B. Smith ;Ji TICT
Mr. David Wiley
SOUTHWEST FLORIDA WATER MANAGEMENT DISTRICT
2379 Broad Street
Brooksville, Florida 33512
Re: Proposed SWFWMD investigations in the inter-wellfield region,
Pasco County, Florida.
We met on the subject matter in your offices on May 19, 1983, and
discussed the possibilities of incorporating some of the elements
of the previous Butler and Edwards Associates proposal for inter-
wellfield regional studies into your.prospective "one-year" program.
This letter is to provide you with a summary of the "minimum" ele-
ments we feel ought to be included in your investigation. Please
be advised we feel that the minimum elements offered below are
essential for the one-year program to be adequate as an indicator
of the possible problem in the inter-wellfield region. However, it
is not sufficient to provide the necessary definition that is achiev-
able by a larger scope of effort.
------e are agreeable to the approach that makes a beginning with a mini-
mum program for the first project year. However, we do not feel
that the data achieved with these minimum elements will be conclu-
sive at the end of the first year. Therefore, we are hopeful that
the prospective one-year program will be a basis to maintain moni-
toring and testing in the inter-wellfield region (and perhaps augment
same) in future years.
The essential points we made for the "minimum" or "one-year" program
are as follows:
1. Include two water balance plots and related tests in the
proposed SWFWMO program. This element of investigation
is essential as a minimum and is no less conclusive than
several other of the tasks proposed currently by the SWFMMD
staff. If the resulting data indicates a potential problem,
then the water balance plot investigations can be expanded
to increase the confidence level in the results.. We are
proposing that the balance plots be constructed and tested .
in the most economical manner through contributions of
of facilities and labor by Mr. Freeman Polk. Accordingly
let we recommend a balance plot be located north of Parker .'
i o. Lake where an additional well pair has been proposed by '-
o the staff. An existing deep well there can be used as a
monitor, sparing the District the expense of constructing
same. With the construction of three shallow monitor wells
I1 I I 1 .1,1i
Mr. William 8. Smith
Mr. David Wiley
(one 6-inch and two 1-inch diameters), the location of
the supplemental ET station at this site, and the install-
ation of continuous water level recorder on the 6-inch shal-
low monitor well this water balance plot would be complete.
We recommend the second balance plot be located near FK-12
on the Ft. King Ranch. Here Mr. Polk has recently completed
a ten-inch deep well that can be used as a monitor. With
the addition by the District of the three shallow wells, a
recording rain gage, and a continuous water level recorder,
this plot would also be complete.
Soil moisture and physical characteristics should be deter-
mined from samples taken during installation of the shallow
wells. The balance plots then may be included as water level
and soil moisture data gathering points associated with the
thermal imagery studies.
2. We recommend that the current District monitoring of the
surface water levels in Parker Lake and wells FK-6s and'
FK-6d be deleted or better, substituted with other moni-
toring not presently being done. These levels are cur-
rently monitored by Mr. Polk's consultants and hanch
foreman. This data can be turned over to the District,
-saving the duplication of costs of monitoring and of in-
stalling a staff gage in Parker Lake. In addition, moni-
toring the water balance plots including changing the
_- ----order charts and weekly water level monitoring on non-
recorder equipped wells can be conducted by Mr. Polk's con-
sultants and transmitted to the District. These cost
saving suggestions are offered in consideration of the
balance plots to be located on Ft. King Ranch where a
weekly monitor program for the first one-year duration
is already committed by Mr. Polk.
3. We suggest that the proposed geophysical survey lines (and
if possible the intersections of those survey lines) be
located to pass through the water balance plots. With this
configuration, the water balance plot information can pot-
entially be used for control in interpreting the geophysical
4. The above suggestions concerning integration of balance plot
monitor facilities and effort by the District and Mr. Polk
are offered to minimize the additional costs to the District.
If these additional costs are considered still too great we
suggest that the thermal imagery and additional environmen-
tal monitor transects proposed by the District staff will
provide data of a less conclusive nature than the water bal-
ance plots, and therefore these items might be deleted in
favor of funding the water balance plots.
Mr. William B. Smith
Mr. David Wiley
In addition to the above recommendations, we discussed our very pre-
liminary analysis of the Leggette Brashears & Graham, Inc., report,
"Ft. King Ranch and Water Level Study", dated January, 1982. A list
of the references I used in my preliminary analysis is attached,
which may be of use to you in conducting your further review of this
report. As we discussed, that preliminary analysis suggests to us
that leakage from the water table into the Floridan on much of Ft.
King Ranch is higher than that predicted by the assumed leakance co-
efficient used in the LBG report. Although our review was very pre-
liminary in nature, we feel that data gathered in constructing and
monitoring the proposed water balance plots will prove valuable toward
verifying site specific soil and moisture conditions, which could sub-
stantiate the preliminary indication of our analysis.
We also feel that field verification of the preliminary analysis of
the LBG data will assist in providing a technical basis for adopting
a more thorough investigative and monitoring effort to encompass the
whole of the inter-wellfield region.
Please feel free to call me in regards any of the matter discussed
above. I will be happy to answer any questions or provide whatever
assistance I can.
BUTLER AND EDWARDS ASSOCIATES
Jim R. Edwards, C.P.G.
1. Butman, H. H. 0. and N. C. Brady, 1969. The Nature and Properties
of Soils. MacMilliam and Co., New York, N.Y., Figure 7.7
2. Davis and Deweiss, 1966, Hydrogeology John Wiley and Son, Inc.,
New York, N.Y.,- Page 394.
3. Tollman, 1959, Groundwater Hydrology, Page 156.
4. Pasco County Soil Survey.
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