1985-0960885L (44L)
1089L
NO
AN ORDINANCE APPROVING AN AGREEMENT BETWEEN THE CITY OF DENTON AND
RONE ENGINEERS TO PROVIDE SUBSURFACE INVESTIGATION SERVICES FOR
THE CITY'S SANITARY LANDFILL, AND PROVIDING FOR AN EFFECTIVE DATE
WHEREAS, Section 2 36(f) of
that the City Council approve
$3,000, and
the Gode of Ordinances requires
all expenditures of more than
WHEREAS, Section 2 09 of the Charter of the City of Denton,
Texas requires that every act of the Council providing for the
expenditure of funds or for the contracting for indebtedness shall
be by ordinance, NOW, THEREFORE,
THE COUNCIL OF THE CITY OF DENTON HEREBY ORDAINS
SECTION I
That the City Council hereby approves and authorizes the Mayor
and City Secretary to execute and attest, respectively, the
agreement between the City of Denton and Rone Engineers, providing
for Subsurface Investigation Services for the City's Sanitary
Landfill under the terms and conditions being contained in said
agreement which is attached hereto
SECTION II
That this ordinance shall become effective immediately upon
its passage and approval
PASSED AND APPROVED this the 1V7,,day of ,
1985 V
ATTEST
yg,i& ~ OTTE ALLEN, CI Y SECKEMY
CITY OF DENTON, TEXAS
CIT OFD TON, TEXAS
APPROVED AS TO LEGAL FORM
DEBRA ADAMI DRAYOVITCH, CITY ATTORNEY
CITY OF DENTON, TEXAS
BY
Rone Engineers 11308 Emerald Street
Geotechnical Consultants Dallas Texas 75229
Materials Testing (214) 241 4517 Metro 263 1555
RoneEn 0gineers
April 10, 1985
Proposal 3-14
City of Denton
Department of Public Works
901 Texas Street
Denton, Texas 76201
SUBSURFACE INVESTIGATION
EVALUATION OF LANDFILL BOTTOM
CITY OF DENTON LANDFILL - PERMIT NO 1590
DENTON, TEXAS
Gentlemen:
We are pleased to submit our proposal for conducting the subsurface
investigation in conjunction with the referenced project This proposal is
based on our converstion of March 27, 1985 with Mr Joe Lebaue, and on the
application permit authorized by the Texas Department of Health
Soil borings were drilled at the site for the initial "Soil and Liner
Evaluation Report" (SIER), dated February 13, 1985 Results of that study
indicate additional fill volume may be achieved by over excavation and
recompaction of the underlying clay soils The entire area investigated was
about 320 by 400 feet The SLER certified an area of 200 by 400 feet A
lined sidewall area, approximately 500 feet long, exists along the north
property line The lined sidewall area begins 50 feet east of the 200 by 400
feet certified area It is recommended that the entire 500 feet of sidewall
be lined at one time Consequently, the next SLER should certify an area
approximately 650 by 400 feet The following proposal and cost estimate is
based on this 650 by 400 feet area
Based on past experience with this project and requirements outlined in the
permit application, we anticipate the subsurface conditions to consist of
clays, sandy clays and sands of the Woodbine Geologic Formation
Accordingly, the costs shown for this proposal are based on boring depths of
25 feet below existing grades, and the anticipated soil condition The final
invoice will be based on the specific quantities drilled and tested If
unanticipated conditions are encountered during drilling, you will be notified
accordingly
FIELD INVESTIGATION
We plan to define the subsurface conditions with a total of 24 sample borings
drilled to depths of 20 to 25 feet below existing grades
City of Denton
Proposal 3-14
April 10, 1985
Page Two
All borings will be drilled using truck-mounted equipment Cohesive and non-
cohesive soil samples will be obtained using three-inch diameter Shelby tube
samplers and two-inch diameter standard split-spoon samplers, respectively
All samples will be extruded in the field, logged, checked for consistency
with a hand penetrometer wrapped to preserve their condition, and returned to
the laboratory for further testing
LABORATORY INVESTIGATION
Based on our experience of the soil conditions and general geology in the
area, it is anticipated that laboratory tests will be required to classify the
sods, and determine the permeability characteristics It is therefore
anticipated that the following tests will be required
1 Moisture content and soil identification,
2 Sieve Analysis (through #200 sieve),
3 Liquid and Plastic Limit determinations;
4 Moisture Content and Unit Weight determinations; and
5 Permeability tests
ENGINEERING SERVICES
The results of the field and laboratory data will be submitted in an
engineering report together with our analyses of the results and
recanmendations The report will include
general soil and groundwater conditions in the area,
recommended depth for bottom of landfill,
earthwork recommendations, and
any other geotechnical requirements revealed by these studies
COST FOR SERVICES
We will perform the services in accordance with the attached schedule of fees
Based on the above quantity of work and the attached schedule, the total cost
of this investigation should be on the order of $5,900 00 to $6,000 00 For
budget purposes, a maximum cost of $6,000 00 is recommended This cost will
not be exceeded without prior authorization
We can begin these studies within 5 days of receipt of notice to proceed,
weather permitting, and we anticipate 2 working days to complete the field
investigation The final report should be submitted 2 weeks following the
completion of the field phase of our investigation Preliminary design data
can be made available sooner if necessary
Rone Engineers
City of Denton
Proposal 3-14
April 10, 1985
Page Three
Thank you for the opportunity to present this proposal Please sign and
return one copy as your authorization to proceed
We look forward to working with you on the protect If any questions arise,
do not hesitate to call
Very truly yours,
/ROONE NE
Ronal F ed, P E
Vice-President, Engineering
KAK/RFR/awm
copies submitted: (2)
Rone Engineers
COSP ESTIMATE
EVALUATION OF LANDFILL BOTTOM
CITY OF DENTON LANDFILL
DENTON, TEXAS
This cost estimate is based on an evaluation of a 650 by 400 foot area
Sample borings will be drilled on a 100 foot grid system, as specified in the
permit application Borings will be drilled to a depth of about 25 feet
Sample borings will not be drilled along the north property line which will be
lined
Field Investigation
Mobilization of drill equipment, location of borings,
observation of post-drilling water levels - lump sum $ 150 00
126 Linear feet of core borings (continuous sampling)
in soil @ $12 50/foot $ 1,575 00
324 Linear feet of auger borings @ $6 00/foot $ 1,944 00
Subtotal, Drilling $ 3,669 00
Laboratory Investigation
20
Moisture Content & Soil Identification @ $3 50/each
$
70
00
10
sieve Analysis (through #200 sieve) @ $20 00/each
$
200
00
10
Liquid and Plastic Limit determinations @ $30 00/each
$
300
00
10
Moisture Content and Unit Weight determinations
@ $11 00/each
$
110
00
8
Permeability tests on undisturbed soils @ $50 00/each
$
400
00
Subtotal, Laboratory $ 1,080 00
Engineering Services
Engineering Analysis and Report - lump sum $ 700 00
10 Hours Site Engineer @ $50 00/hour $ 500 00
Subtotal, Engineering $ 1,200 00
TOTAL $ 5,949 00
Total estimated cost is $5,900 00 to $6,000 00 Unit prices shown are
applicable through August, 1985 The final invoice will be based on the
specific quantities and tests performed
Rone Engineers