WA9302-CS 960308SHIMEK, JACOBS & FINKLEA
CONSULTING ENGINEERS
8333 Douglas Avenue, #820
Dallas, Texas 75225
(214) 361-7900
ROSS L. JACOBS, P.E.
RONALD V. CONWAY, P.E.
JOHN W. BIRKHOFF, P.E.
JOE R. CARTER, P.E.
GARY C. HENDRICKS, P.E.
C. L. SHIMEK, P.E.
I. C. FINKLEA, P.E.
JAMES E. LAUGHLIN, P.E.
March 8, 1996
Natgun C poration
11 Te oad
W2~assachusetts 01880
Attention: Mr. Bob Barbarisi
Re: City of Coppell
Village Parkway Ground Storage Reservoir No. 2
Dear Mr. Barbarisi:
We are in receipt of your request dated February 14, 1996, for a Change Order to cover the cost of quality
control and materials testing on the City of Coppell, Village Parkway Ground Storage Tank project. You have
also sent to us by fax transmission dated March 5, 1996, Natgun's review of the Noah Central Texas Council
of Governments, Standard Specifications for Public Works Construction relative to testing procedures and
responsibilities.
We have reviewed your request with the City of Coppell, and have again concluded that the testing performed
by the City on this project is for the sole benefit of the City. Any additional testing required by Natgun
Corporation to assure, warrant or otherwise guarantee your finished project, is and shall be Natgun's
responsibility. This includes any and all overtime charges associated with testing procedures that were
performed at times convenient to and as directed by Natgun.
As for the testing procedures and responsibilities outlined in the NCTCOG Standard Specifications, you are
reminded that the Special Conditions for this project, as outlined on Section 5 of the specifications, supersede
and take priority over the NCTCOG Standard Specifications (see Item 1.19. Priority of Contract Documents,
NCTCOG Standard Specifications, Part I: General Provisions). Section SC. 19 of the Special Conditions
outlines the testing procedures to be performed by the City. It is our interpretation of this section of the
Special Conditions that the testing being performed by the City is limited to the items outlined, and includes no
provisions for overtime charges to be paid by the City.
Your attention is directed to the project specifications, Section 2, Specific Project Requirements, Item 2.19 -
Inspection. In general, this section outlines and defines inspection services, establishes the contract work time
and overtime procedures. It is our interpretation of this section of the specifications that all inspection services
Mr. Bob Barbarisi
Natguh Corporation
March 6, 1996
Page No. 2
conducted before 8:00 am and after 5:00 p.m., Monday through Friday, and all weekend and holiday
inspection services, are subject to overtime charges which are the responsibility of the contractor.
Your request for a change order to cover cost associated with additional materials testing, quality control and
overtime charges has been considered and rejected by the City of Coppell. We ask that you again review the
outline of testing service proposed by the City and make any arrangements necessary to provide additional
testing as you require to fully warrant and guarantee your finished product.
CC:
~r. Ken Griffin, P.E.
Mr. Larry Davis
Sin~,Y~
Gary C. Hendricks, P.E.
15: 42 9617 2,~r--
'9
NATGUN CORP. 7 ~ 001
FAX
DATE SENT:
SENT TO:
Company:
Facsimile No.:
Attention of:
FROM:
TRANSMITTAL
HNPRECAST
PRESTRESSED
PREFERRED
Es::~blished 1929
Natgun Corporation
Precast Concrete Tanks
El:yen Teat Road
Wakefie[d, MA 01880-1223
Telephone 617-246-1133
Fax 617-245-3279
Robert V. Barbarisi/Jr.
Project Manager
Direct line: 617-224-5147
Direct fax: 617-224-5153
SUBJECT:
6.0 MG Ground Water Storage Tank
Coppell, Texas
-r~-~-,a~ ._
NUMBER
OF PAGES:
(NOT INCLUDING THIS COVER SHEET)
~ ~
If you do not receive all pages listed above or if y copy
is not cleat, please contact the person listed below at
(617) 224-5124.
Kristine Dow
(contact person)
SourawesT Onmz: Suite 811, 811 t Preston Road, Dallas, TX 75225-6316, Telephone 214-368-33C6
MIDWBST C)FFtCE: Suku 2! 1, 2610 Sheddan Road, Zion, [h 60099-2615. Telephone 708~72-8806
~tXO-A~AN~C O~vtCt: Suke 100, 3650 Winding Way, Newtown Square, PA 1907], Telephone 610-353-8315
03/05/'96 15:43 9617 2." ,'9 .NATGU.X CORP. 7 ~002
ITEM 1,42,3. 4e
1.42.1. REMOVAL OF DEFECTIVE AND UNAUTHORIZED WORK: All
work whkh has been rejected or condemned shall be repaired, or if it
cannot be repaired satisfactorily. it shall be removed and replaced at the
co.~TR^rro~t's expense. Defective materiMs shall be immediately re-
moved from the site of the work. Work done without line and grade
having been given, work done beyond the lines or not in conformity
with the grades shown on the plans or ~ given, save as heroin pro-
vided, work done without v,~ten authority and prior agreement in
writing ~s to process, shall be done at the coN"raAc-foe's risk and shall be
considered unauthorized and, at the option of the ow.~n may not be
measured ar/d paid for: and may be ordered removed at the CONVP. AC-
~'S expense. Upon failure of the cos?RAcroa to repair satisfactorily Or
to remove and replace, if so direetsd, rejected, unauthorized or con-
demned work or materials, immediately alter receiving notice from the
owneR. the ow~a shall, al~er g~ving ~'ritten notice to the cos-r~Ac-ton,
have the authority to cause defective work to be reinerie4 or removed
and rephced, or to cause unauthorized work to be removed and to de-
duet the cost thereof from any monies due or to become due the coN-
T~^~rOX. Alternatively, the ow~z~ may, at its option, declare the cog-
T~^C'm~z {n clefsuit, in which event the performance bond surety shall
complete .the conu, act.
1,42.2. RNAL INSPECTION: The owssa shall m~ke final inspection of
all work included in the contncl; ~ soon as prnetieable after the work is
completed and rezdy for acceptance. If the work is not acceptable to the
ow~sa at the time of such inspection. he shall inform the co,vn^croa ~s
to the particular defects to be remedied before final acceptsnee shall be
made-
1,42,3, SAMPLES AND TESTS OF MATERIALS; Unless othenvise
stipulated in the contract documents, initial testing of all marshals,
construction items or ~roc~uer~ incorporated in the work shatl 0e pet-
'forme~ ~tihe direction and e/c!~nse o1 me ow~sz, mciumng mzusj com-
pactinn and density tests de(reed .neceSsary... ....
In the event materials, construction items or products incorporated
in the work fail to satisfy the minimum requi~ement. s of the initial test,
appropriate proveout test shall be made as directed by the ow~r-~ to
determine the extent of the failure ~nd to verity that the corrective
measures have brought the item up to specification requinments. The
cost of all testing necessary to determine the extent of the failure and
the adequacy of the corroctive measures shall be the responsibility of
the coNTS~croa.
The failure of the ownsa to make any tests of materials shall in no
way relieve the coNra~croz of his responsibility of furnishing materials
cont~orming to the contra.~ documents.
Tests, urdess otherwise specffied, shall be made in accordance with
the latest methods of the American Society for TestinZ and Materials.
The COiNTRACTOR shall provide such facilities as the owNn may require
0~/05/'96 15:43 ~J'617 2.~'~ J ~ATGUN CORP. ~ 003
for coBecting and forwelding samples and sha~l not use the ma~ed~s
represented by ~he samples until ~ests have been m~de. The co~
sh~[ {~ish adequate sample~ ~i~out charge.
~e inspections and tests made by ~ ow~, its ~nsvecton or
sh~li ordinary be made ~thout cost to the co~T~O~ Unless O~e~
~se e~p~SSly s ecified in the cootnet d~cumenU. The co~g
shaR f~h ~t~ut additio~l cos~ ~o the owNzx s~ch mate~a~ for
testing ~ may be re~onahly neeessay. Ret~ting ~er failure ~ p~
tea~s shall be at the expense of ~he cob. TRemoR. Should the percenUge
of rejected mated~ or equipment be u~e~onably ~ge. ~e additio~
~st of such inspection ~d te~ts resulting ~here~om sh~ll
the CO~TZ~OR. The owNga shall judge what is extra i~pection
sh~l deterrio ~he additional cost inched thereby ~d payable by
CONTRA~OR.
iTEM 1,43. NO WAIVER OF RIGHTS OR ESTOPPEL
The owNBK, or any Officer or agent thereof, shalt not be precluded
any time, either before or aRer final completion and acceptance .of the
work and final payment therefor frnm:
(a} shQv~ng the true and correct amount, da~sificatiQns, quality
and character of the work done and materials furnished by the CONTaAC-
TO~ or any other person under this contract, or Erom showing ~ any
time that any determination, return, decision, approval, order, letter,
payment or certification is untrue and incorrect, or improperly made in
any particular, or that the work or the materials or any parts thereof.
do not in t~ct con.form to the cootoct requirements; and
(b) from demanding the recovery from the COSTaA~O~ Of any over-
payments made to h~m, or such damages as the ow~ may sustain by
re~-son of the CO.~Tz^CTOa'S faiIure to perform each and every pax~ of this
centoct in strict accordance with its terms; or both.
ITEM 1.44, CONTRACTOR DEFAULT: OWNER'S RIGHT TO
SUSPEND WORK AND ANNUL CONTRACT
The work or a~y portion of the work under contract shall be sus-
pended immediately on written order of ';he ow~sz declaring the eoz~-
n~,cToa to be in default. A copy of such notice sha~l he served on the
co,~T~^c-ro~'s surety. The contract may ~ armored by the owz~r.z for any
good cause or causes, among others of which special re£erence is made
to the follow;rag:
(a) failure o{ the co~^c. ro~ to s~ the work within lO days f~om
da~e spedSod in the w~tten work order issued by the o~.'4zl to begin
the work;
(b) subs~antia~ evidence that the progress of the work being made
by the COh'TZ~CTO~ iS inSu£fident to complete the work w~thin the sped-
fled worPAng time;
(c) fadlure of the CoNTa~CTOX tO provide sufficient and proper equip-
ment. m~teriads or construction forces for properly executing the work;
,.____03.'05.'96 15:44 8617 2~'~, 9 NATGUN CORP.
SPECIFICATIONS I~OR STRUCTURAL CONCRETE
301-29
15.5----Application of prestressing force
15.5.l--Tendons shall bc stres~d in the sequence, at the
concrete strength, and at the construction stage indicated in
the contract documents.
15,5,2---The prostressing force shall be determined by
measuring tendon elongation and checking jack pressure
with a calibrated gage or dynamometer. The gage or
dynamometer shall have been calibrated within six months
prior to use: any discrepancy which exceeds 5 percent shall
be corrected. Elongation requirements shah be based on
load-elongation curves rot the steel used unless statistical
data indicate that average values may be used. The contrac-
tor shall keep and submit a record for each tendon of the
measured elongations and me gage pressures of dynamom-
eter readings.
tS,S.3--The total loss of presu'ess Force in any tendon
due to unrcplaced broken elements shall not exceed 2
percent or' the total prostress force. :
15.6---GroutinS
I:~,6. I--A dependable high pressure water supply of
sGfficient volume shall be provided before groutinS is
begun- Sheathing shall be freed of dirt and other foreign
substances by thorough flushing with water immediately
prior to grunting.
15.6.2--Grout shall be mixed in a high speed mechan-
ical mixer and passed through a strainer into pumping
equipment which has provision for recirculation. Pumping
of grout shall begin as soon as possible after mixing and
may be continued as long as the grout returns the proper
consistency. Grout which has partially set shall ~ dis-
carded.
iL6.3--Grout Shall be injected into all voids between
prostressing tendons. sheathing and anchorage fittings.
Flow shall continue until grout of the consistency equivalent
to that injected flows without the presence of air bubbles
from vent openings. Vent Openings shall be closed progres-
sively in the direction of the flow. After all vent openings
have been closed, the groutinS prossun: shall be raised to at
least 50 psi and the injection hole plugged.
15.6.4--In the event of a blockage or an interruption of
groutinS, all grout shall be removed from the duct ~y
flushing with water.
l$.6.$--Provisions shall be made to keep tendons dry
and keep water out o~ the conduit prior tO groutinS. Tl~e
concrete around grouted tendons shall be maintained at a
temperature of 45 F or higher for at toast 3 days after
groutinS.
15.7--Shop drawings
Shop drawings for proguessed concrete shall he submit-
ted for review and shall provide the following information
in addition to that required by applicable provisions of
Chapter 4. FOrmwork. and Chapter 5, Reinforcement.
15.7.1 --The location of tendons throughout their length.
l$,7.2--Size, details, location, materials, and stress
grade (where applicable) for all tendons. and accessories.
l$.7.3--lack clearances, jackinS procedures, suessing
sequence. initial tensiGning forces. gage pressures, and
15,7,4--Information required in Sections 15.2.1.2 and
15.2.1.3.
Notes
[n the Sections of Chapter 15 listed below, specific
acceptance is required:
15,2.1.2 and 15,2,1,3 Of the stress-strain curves for
prostressing steel and other properties of non-ASTM mate-
rial.
15,2.1,4 Of the stress loss in seating anchorage devices,
friction coefficients and test data.
15,2,1,5 Of coatings to protect unbonded tendons from
corrosion.
15,2,1.6 To perform burning or ~.'elding operations in the
vicinity of tendons.
15,2,2.2 Or' evidence of compliance with the dynamic
test.
1L2.2.3 To use couplings at locations other titan those
indicated on the contract documents.
15.1,6.3 Of the shrinkage compensating admixture used
in the grout.
15.2,6.4 Of tests or records showing no harmful effect of
admixtures on tendons, accessories or Stout-
15.7 Of shop drawingS.
CHAPTER 16--TESTING
16.1--General
Concrete materials and operations will be tested and
inspected as the work progresses. Failure to detect any
defective work or material shall not in any way prevent later
rejection when such defect is discovered nor shall it obligate
the architect/engineer for final acceptance.
16,2--Testing agencies
16,2.1--The required testing services of Sections 16.3,
16.4, ~d i&5 shall be pe~ormed by the testing agency
designated in the contract documents. The services of
Sections 16,3 and 16.4 will be pe~ormed at no cost to the
contracto_r_, those of Section 16.5 shift[ ~ paid for by the
contractor.
16,2.2--The necessary testing services of Section t6.7. l
shall be performed by a testing agency acceptable to the
architect/engineer at the contractor's expense.
16.2.3--Att testing agencies shall meet the requirements
of ASTNI E 329.
16,2.4--Tests of concrete required in Section 16.3 shall
be made by an ACt Concrete Field Testing Technician
Grade 1, or equivalent. Equivalent certification programs
shall include r~quirements for written and performance
examinations as stipulated in ACI publication CPI.
16.a--Testing services
The following testing services shall be pe~onwcd by the
designated agency:
16,3.1--Review and/or check-test the contractor's pro-
posed n~ate~als for compliance with the specifications,
16.3,2~Review and check-test the contractor's pro-
posed mixture design when required by the architect/
engineer.
004
03/q8/96
FRI 09:12 FAX 617224~153
NATGUN
~ ool
DATE SENT:
FAX
TRANSMITTAL
PRECAST
PRESTRESSED
PREFERRED
Natgun Corporation
Precast Concrete Tanks
Eleven Teal Road
Wakefield, MA 01880-[223
TeLephone 617-246-l 133
Fax 617o245-3279
SENT TO:
Company:
Facsimile No.:
Attention of:
FROM: /
.. a~y FJF_..N'O
Robert V. Barbarisi, Jr.
Project Manager
Direct line: 617-224-5147
Direct fax: 617-224-5153
SUBJECT: 6.0 MG Ground Water Storage Tank
Coppell, Texas
NUMBER
OF PAGES: .-4----' (NOT INCLUDING THIS COVER SHEET)
If you do not receive all pages listed above or if your copy
is not clear, please contact the person listed below at
(617) 224-5124. ,~_.~"""~...~-
Kristlne Dow
(contact person)
SOUTHWEST OFFICE:
Ni[DWEST OFFtCE:
Ni/D-ATLANTIC OFFICE:
Su;.:c 811.8!i I Preston Road, DaLlas, TX 75225-6316. Totephone Z!4-368-3306
Suiee 21I. 26 ~0 Shot:dan Road. Zion, IL 60C~9-2~t5, Telephone 706-872-8806
5',~i:e 100, 3650 \Vind!ng \'Uav. Newtown Sq,:are, PA 19073. Telephone 610-353-8315
03/,08/96 FRI 09:13 FAX 6172245153 NATGUN
~0' ~ 'lWlOl
[~002
...... i- GEE Consultants, inc
E ;~ NGIN~ERING
10046 Monroe Driv: · Dallas, Texas 75229 * (214) 352-5433 · Fax (214) 352-6972
I INVOICE{
To: Mr. Bob Barbarisi, Jr. :.
Natgun Corporation
Eleven Teal Road
Wakefield, MA 01880-1292
Invoice No.: 5258-6
Invoice Date; February 29, 1996
Proiect:
Date of
01-04-96
01-11-96
02-14-96
02-14-96
02-21-96
02-21-96
02-21-96
Field and Laboratory Testing Performed
February, 1996
6.0 MG Ground Water Storage Tank
Coppell, Texas
Description
I~cbar Impc~'tion, Overtime rate (before 7:30
am, after S:00
Rebar Inspe~ion, Over time rate (after 5:00
pm)
Pick Up Shotcrete Test Panel, Regular time
tat=
Trip Charge
Concrct~ Mix Inspeaion Cancellation,
Regular time rate
Concrete Cylinders
Trip Charge
Please Pay
Quantity Rate
0.5 hrs $40.16
0.25 hrs $40,16
2.0 hrs $29.75
1 ea $12.50
1.5 hrs $29.75
9 ea $13.00
1 ea S12.50
Terms: Due Upon Receipt
Total
t~:~ 966;-90-~UM