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WA9302-CS 960515SHIMEK, 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. May 15, 1996 Natgun Corporation 11 Tea oad W~iachusetts 01880 Attention: Mr. Bob Barbarisi Re: City of Coppell Village Parkway Ground Storage Reservoir No. 2 Dear Mr. Barbarisi: On Monday, May 13, 1996, we conducted a walk-through of the interior portion of the ground storage reservoir. This walk through was conducted in anticipation of the tank being disinfected and filled. It was not intended to be a final inspection. In attendance were: Matt Cast .........................City of Coppell Larry Davis ......................City of Coppell Brian Phelps ....................Natgun Corporation Gary Hendricks ................Shimek, Jacobs & Finklea The following items were found to be in need of correction prior to filling the tank: 1. The areas around the wall slots have a significant amount of small, loose pieces of grout. These areas should be pressure washed and the loose material removed prior to filling the tank. Honeycombs were noticed in the wall panels near the wall slots. These areas were marked on the inside tank wall by the City and should be grouted or otherwise repaired. If the wall slots were numbered from the inside ladder, to in a clockwise direction starting with number 1 to the right of the ladder, wall slots 2,3 & 12 had the most noticeable honeycomb areas. 3. Repair the chip in the cove between wall slots 6 & 7 (same numbering system) ~vlr. Bob Barbarisi Natgun Corporation May 15, 1996 Page No. 2 The lower stainless steel restraining strap in the inlet line is not square with the inlet pipe and tank wall. appears the strap is too long and was skewed to make fit. This needs to be corrected prior to filling the tank. It o The lower flange bolts on the inlet pipe show signs of rust. These should be dried, cleaned and re-coated. It was suggested by the City that the area between the tank floor and the lower flange on both the inlet and overflow pipes be filled with silicone caulking. The inlet pipe coating is marred and does not appear to be clean. The inlet pipe should be thoroughly cleaned after the restraining strap is repaired and the lower flanges are re-painted. It is the intent for this pipe to have a completely new appearance with a long term coating system that will withstand the conditions in the tank. Several dome slots on the inside of the tank do not have the concrete or grout completely filling the slots. This appears to be most prominent in the areas in and around the inlet and overflow pipes. On the lower dome slot immediately to the right of the overflow pipe, the weld tab is visible. The shop drawings show that the dome slots on the inside of the tank are to grouted. Once these items are corrected or addressed by Natgun, another walk through should be scheduled prior to filling the tank. Sincerely yours, cc: Mr. Matt Cast ~/~lr. Larry Davis 05/01/96 BED 09:50 FAX 6172245153 NATGUN ~ 001 FACSIMILE TRANSMITTAI, COVERSHEET DATE SENT: May 1, 1996 COMPANY: FACSIMILE NO.: Shimek, Jacobs & Finklea (214) 361-0204 PRECAST PRESTRESSED PREFERRED Natgun Corporation Prcca~t Concrete Tanks Eleven Teal Road Wakefield, MA 01880-IZZ3 Telephone 617-246-t 133 Fax 617-245-3279 ATTENTION: Mr. Matt Hickey FROM: Robert V. Barbarisi, Jr., Project Manager Direct dial telephone #: 617-224-5147 Facsimile #: 61%224-5153 REFERENCE: 6.0 MG Ground Water Storage Reservoir Coppell, IX (95Cll) Dear Matt: We are in receipt of your letter of April 29, 1996 regarding the above-referenced project. In response, we have the following to offer: Tank Filling We would recommend filling the tank over a 2 day period. Tank Disinfection The tank shall b= disinfected in accordance with Page 5-10 of the Specifications. I'Lvdrostatic Testing The test procedure will be as prescribed in the Contract Specifications on Page 5-I 1. We would suggest that the water be allowed to settle for a day after the filling operation is complete prior to initiating the 24 hour hydrostatic test. PrOject.Schedule We have enclosed a copy of our updated construction schedule. Should you have any comments or questions, please feel free to call me at any time. R rt V. Barbaxisi. Jr. gger' StJUTR~"gST CJI:FIe[: Suit(2 811, 8Z 1 t Preston Road, Dallas, TX 75225-6316, Telephone 214-368-3306 MmwsT OFFlCF' Suite 21 I, 2610 Sheridan Road, Zion, IL 60099-2615, Telephone 708-872-8806 Mm-ATt~.~r~c O~nct: Suite 1(~0. 3650 \Vinding Way, Newtown Scmare, PA 19073, TelephoDe 61e.-353-8315 NATGUN CORPORATION SHIMEK, 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. May 3, 1996 Mr. Larry Davis Construction Inspector City of Coppell P.O. Box 478 Coppell, Texas 75019-4409 Re: Village Parkway Ground Storage Reservoir No. 2 Dear Mr. Davis: In response to your questions concerning the hydrostatic loading and testing of the Village Parkway Ground Storage Reservoir, Natgun has recommended filling the tank over a two day span with a 24-hour settling period. After the settling period, the drop in water surface elevation over the 24-hour period will be measured and recorded. The allowable leakage limits for the test are no visible leaks, and a drop in water surface of one-half (1/2) inch. We are enclosing a copy of Natgun's Memo concerning the Hydrostatic loading and testing. On April 24, 1996, Natgun's Quality Control Manager visited the job site to investigate reports of surface flaking on the floor slab. We are enclosing a copy of Natgun's letter dated May 1, 1996 indicating their position on the flaking of the floor slab. On April 17, 1996, five separate Windsor Probe Tests were performed at various locations on the dome ring of the ground storage tank. The test has an accuracy of + 3 percent. The test was performed by Ready-Mix Concrete Company and recorded by Maxim Technologies. Two of the five tests were performed in the general location where the Gee Consultant's 28 day break revealed concrete strengths less than 4,000 psi. The results of the Windsor Probe Test indicated concrete strengths in the range of 4,800 to 5250 psi. Natgun's design of the dome ring is based on a concrete strength of 4,500 psi. The mix design of the concrete calls for a required strength of 5,000 psi. We are enclosing a copy of Natgun's letter dated May 1,1996, indicating their position on this subject. We are enclosing for your records the Rebound Hammer and Windsor Probe Test results, Windsor Probe Test literature, Ready mix' s Windsor probe Certification and the Batch plant records of the concrete mix. We are also enclosing for your records a copy of Natgun's time schedule for the remainder of the project. We are available to discuss any of the testing methods used during this project at your conveni ce. Gary C. H icks, Enclosures cc: Mr. Bob Barbarisi 05/01/96 WED 17:01 FAX 6172245153 NATGUN ~ 002 May 1, 1996 PRECAST PRESTRESSEI ) ['REFERRED NaTgun Corporation Precast Concrete Tanks Ele.~¢n Tgal Road Wakefield, MA 01880-1223 Telephone 617-246-I 133 F.~x 6[7-245-3279 Mr. Gary Hendricks, P .E. Sl~mek, lacobs & Finklea 820 Dallas Federal Tower 8333 Douglas Avenue, ~t820 Dallas, TX 75225 Reference: 6.0 MG Ground Water Storage Reservoir Coppell, TX (95C11 ) Gentlemen: On Wednesday, April 24, 1996, I was present on the subject site to investigate reports of s~face flaking of the concrete floor slab. Minor surface flaking of the floor slab was noted to have occurred in three distinct areas. The underlying concrete in these areas was inspected and observed to be hard and sound. The floor slab has been entirely cleaned utilizing a high-pressure water blast to remove all dirt, lait~tence and flaking material. The remainder of the floor was found to be in excellent condition with no signs of surface flaking. In our opinion, no remedial work is required. The minor surface flaking that has occurred will not affect the long-term durability of the floor slab. If I can be of any further assistance, please do not hesitate to contact me. JGM:Md Very truly ~3urs, joseph G. Manzi, Jr., P.E. SC)UTI,lX,X.'[:ST OFFICF-: Sll[Ire 811,81 I1 Preston Road, Dallas, TX 75ZZ5-63 16, Telephone 214.368-3306 M~DwEs'r Ornc~: Suite 211, 2610 Sheridan Road, Zion, IL 60099-Z615, Telephone 708-872-8806 MIV-.a-'rtA.N'rtC OFtlClE: Suice 100, 3650 Winding Way, Newtown Square, PA 19073, Telephone 610-353-8315 05/01;96 09:54 FAX 6172245153 NATGUN ~ ool Sent via fax: (214) .~61-0204 & mail UNPRECAST gI~E"STRESSED R:~F. ERRED 1929 Natgun Corporation Protest Concrete Tanks Eleven Teal Road Wakefield, MA 01880-iZ23 Telephone 617-245-1133 Fax 617-Z45-3279 May 1, 1996 Mr. Gary Hendricks, P.E. Shiraek, .lacobs & Finklea 820 Dallas Federal Tower 8333 Douglas Avenue, #820 Dallas, TX 75225 Reference: 6.0 MG Ground Water Storage Reservoir Coppoll, TX (95C11 ) Dear Gary: We are in receipt of your letter of April 5, 1996 regarding concrete test results for the west side of the dome ring. Apparently, the specimens taken and broken by Gee Consultants failed to achieve the required design strength of 4500 psi in the 28*day test period. Upon being notified of this situation, we initiated non-destructive testing of the subject area along with the remainder of the dome ring. Ready-Mix Concrete Company performed a rebound hammer test on the west side of the dome ring which yielded a srtength result of 6100 psi. In addition, on April 17, 1996, Windsor Probe tests were performed on the entire dome ring by Ready-Mix Concrete in the presence of Maxim Iechnologies. The strength results ranged from 4800 psi to ~250 psi. In light of the above, we are confident that the dome ring concrete meets the specified design criteria and will perform as intended. Should you have any questions, kindly call. Very Truly yours, Robert V. Barbarisi, Jr. RVB :kid Enclosures Suite 81 I, 81: 1 Preston Road, Dallas, TX 75225-6316, Telephone 214-368-3306 Sui~e 211, 2610 Sheridan Road, Zion, IL 60099-2615, Telephone 705.87Z-8806 Since 100, 3650 \lt,'inding Way. Newtown Square, PA 19073, Telephone 610-353-8315 05/01./96 ~%'ED 09:55 FAX 6172245153 NATGUN '~P'R--~];--96 TUE O1 :Z6 PH REZ~I--I'IIXj IHC. TECHNOL'OGIES [~1004 485.5955 P. 82 Maxhn Tech., S~gthweatern Lobs ~00 Gr.ve4 Ddve FOrt Wodh, TeXaS 76t 18,7123 Talephone: (el?) 264,7/59 FAX; (tl/) ~e~1420 REPORT OF WINDSOR PROBE TEST CLIENT; Redi-Mix Concrete 1~5 Mac Arthur Drive Suite 136 Carrollton, TX 75007 PRQJEQT; Water Towe~:, 'Coppal TX icon: Gary Herron PROJE~CT NO.; 110350552Z~ REPORT NO.: 601881 DATE OF ,SERVICg.' &/17/96 AUTHORIZA]]ON: CarZ REPORT DATE.: 4/18/96 SERVICES: Provide withe,as t.o ~indsor Probe test ss authorized. REPORT OF TESTS On this dace, a representative of Maxim Technologies, Inc. vas present the Coppall W~c~r StaraSs Tan~ project to witness ~indso~ Probe teat performed by ~r. Gary Herron vi~h Redi-Mix Concrete. The raMulna are On the followin~ paZa. Technician: Michael Stone CHE Technicia:, Re~ort Otstrlbution: (Z)' Red,-R;X Centrata MAXIM TECH,eSOUTHWESTERN LABS, 05/01,'96 ~TED 09:55 FAX 6172245153 NATGUN 5985 ~ oo6 p,e4 AMERICAN CONCRETE INSTITUTE, 21~1-65 STANDARDs OF CONCRETE'CONTROL Coe?ficient3 of va~tattor, for ·standard control Class of operation ....... General Construction Belo 0.0.~ 10.0-1~.~ TeSt, Type "Ailig. MOhms Cu~e Probe'& Power Load .A~ea .No.- Days' Oertl~Cat~on Number ~.'~ -- _ -. . ..... Falr ) · TABLE 2 " concrete 15,0 - 20,0X N WINDSOR SYSTEMS INC. JAMES NON DESTRUCTIVE TESTING SYSTEMS PROBE TESTS -- compared to -- 160 CORE/CUBEICTL, ~ESTS Zndicate that results with -- 3% -- can be expected IE properly made aug tested cores/cubes/cyl8 are compared to properly probed teaC results, WINDSOR PROBE-TEST COHPARATIVE VALUES Blakeglee Prestr-qs Plant, Hamden, Connecticut. Witnesses: A. Dataeta, Blakeslam; G, Pace, U. S, Army EnSr, Specimens: Campusion C/y.-6 x 6 x 12 blocks. Age: 12 Hrs.-16 da.-28 de. Cylinder Break (psi) av. Blocks Probed (psi) A346 3 - AAO6 A396 3 - AL30 A075 3 - 39OA 5245 (paper molds) 3 - 5996 ~958 3 - A999. 2 cylinder breaks: 6210 same cylinders probed: I Alpha Portland Cement, Lab, Easton, Pennsylvania ivitness: A,T, Heresy, Director Technical Service 6210 cylinder break 5925 same cylinder probed 5750 ~ssachusects Bay Transportation Authority, Boston, PLassachusetts Witnesses: R, E, Warner, Hmtertals Testing Engineer M, Haggetty, AsSistant cylinder break: 5570 cylinder break: 76AO cylinder break: 6930 cylinder probed: 5760 cylinder probed: 7600 cylinder probed: 7300 Rancarl Re~dy~t41x, aart-"oi:ca, Cormeccicut tlitnessas: G, Csvaleri, Supt.; Lou Casks/l, Sodchar Engineering Test Lab; Phil Burton, gngr.; West HartEord, Corm. Cores by Soulher Probe Values 2982 3075 2566 2650 223& 1775 tlote: All tests conducccd or vianagged by a ~,E. or Test Lab. H,B,T.A,, Boston, t.~ssachuseCts (Floating Tunnel) WiCnesses: Bria8s EnSinae. ring; Perrini Construction; H.B,T,A, Cores 3900 Hi Probe 12 tests: Hi AIO0 Cores 3600 Lay Lay 3500 Cores contained 3/8 - L/2 air pockets Cl) C ERTIFI C ATE The WINDSOR DRIVER, Model WPS 500, Serial No. 12235 is hereby certified to be calibrated within the specifications of the manufacturer. is hereby REDI -MIX CONCRETE, INC. OWNER'S NAME 1445 MacARTHUR DR. SUITE 136 CARROLLTON, TX. ADDRESS S.S. 147 TESTED BY INSP # The above described instrument certification is valid when used with probes and powder loads registered and manufacti~red by Windsor Systems, Inc. The delivered energy level was found to be 575 -ftJIbs., 6.5 feet'from the muzzle. Acceptable ballstic test methods were used in this determination.' '.. N* WINDSOe SYSTEMS lNC. ~o~aNON DESTI~UCrI~. TESnNG o.,.: 11'/10 / 9 5. vaua ,or o.0 "y.at . .:!,::: Director Customer entice " TITLE . k "':": :'::' ""' '! Hartford Metropolitan District° Dept. Public Works, Hartford~ Conn. Witnesses: Lou Gaskell, Souther Engineering Test Lab Cylinder Breaks Same Cylinders Probed A600 A6OO ~20 ~50 HeM York Port Authority, Nay York, Nay York Witness: T, C. Cancer, Research EnSineer Flexure Bea~ Cubed Beam Probed 5000 A873 Nay Haven TestinS Lab, Ne~ Haven, Connecticut Witnesses: S. Kledaris; T, W. Thompson, P,E, Slsbs Cored Slabs Probed 3200 3~00 3550 3800 3980 ~200 ~AO0 ~600 1680 2000 A950 5120 6220 5950 6650 6750 Pennsylvania State Highway DepsrCmen~, Harrisburg, Pennsylvania Witnesses: J, Kohler, V, Warone, Engineers el Test Beam Cored Beam Probed 7300 71&O Block Cubed Block Probed 6&30 6370 Gulick-Hmnderson LaborsCuries, FlushinS, t~ev York Witness: J, B, LenS, P,E, Cylinder Break (liahweiSht) ~30 Cylinder Break 673O Cylinder Probed A250 Cylinder Probed 4420 New York Trap Rock, West Nyack, New York Witness: Ra~ Ayers, P,E, Nytralita ASSreSace - Companion Cylinders and Blocks Cylinder Breaks Blocks Probed 2950 3100 4600 6.850 6030 5800 5650 5800 (2) Leonard Concrete Pipc Company, Hamden, Connecticut Witnesses: Claude Bazzard, Royland ~ayo, Connecticut State Highway Department. · Cylinder Break Cylinder Probed 3150 3120 Dag Hannersjold Plaza Cored by: T.W. Tested by: T.W. & P.T.L. (Labs) Cores P .T .L. T .g. AV '3003 (3) 3440 (3) Floor Slabs Probed 2998 (6) Carey Job - East Slab Witnesses by: Yaeger - Principe (C.I.B.) Cored by% Gulick-Henderson Laboratories Cores AV (8-1st sat) AV (G 2rid set) ~210 (8) 4200 Carey Job - West Slab Witnessed by: Yaeger - L. D. Long, P.E. Cored by: Gulick-tlenderson Laboratories Probe AV, (8) 4080 Cores AV (9 let set) AV (9 2rid 6929 Probe A~ (9) 5088 South llall ~itnessed by: L. D. Long, P.E, Cored by: Gulick*Henderson Laboratories Core (9-av.) Probe (9 setm-av.) 3670 3860 Pan AmAddi~ion - JT1; Witnessed by: Yaeger (C.X.B.); L.D. Long, P.E.; D. Quick. q.Co 60 Ceres (av.) 60 Probe Sets oK 3 (av,) 3939 38~0 S~. Lukees Hospital., Hiddleboro, ~sssachusetts Wi'~nessed by: Louis J. Borgnell, Vice President., Briggs Engr. & Testing Cores '~robes Column EeT.5 -.5150 p.s.l. Column ~*7.5 * 5300 p.s.l. Column L 7 - 5700 p.s.i. Column L 7 * 5760 p.s.i. 05/01/96 X%'ED 09:54 FAX 6172245153 NATGUN [~003 ......... REBOUND HAMMER TEST RESULTS TEST 1 TEST 2 TEST 3 . REC)I-MJX, IrTC. GENEFe. AL C:)FF|CEII¢4~., h,'te, cA,lhvr ;rive. S.u. Le 1;iS. CutronteA. Telel P~tE: :~le) i4Z-eS60 FAX: t2'ts~ 323,0759 05/01,'96 ~TED 09:5~ FAX 61722~5158 NATGUN OO2 CLIENT: Natgun DATE: 4/25/96 PRO,.TECT: 6.0 ~ Wa~er $~oz~ T&hk / Co~ell. TeXas REBOUND HAMMER TEST RESULTS TEST NO- 1 KE~T. IND K),,I4~.. ~EST I:~gU'LTE; 43 6104:) 44 6400 39 Z~m '~V/,-4 '~OlA~I3S X08 'lI~'N 0669EiGe%~I~ OT:OT '~ -1 '~ -1995 I 1 = 3-QPH FRO, P'.2 REDI-MIX, iNC. ~445 MacArtt~ur Drive. Suite 136 Carrofiton. Texas 75007 (214) 242-4550 METRO (214) 434-2414 (800) 875-4551 DISPATCH DALLAS FORT WORTH (214),316-0273 (817} ,485.4850 t CONTROL DENTON GAINESVILL[~ {817)566-1100 (817) 665-2858 " EOAO TIMt~ ' TO JOB A~IVE JOEi ~'TE ,., i: ' :'2,0r__/, :7 5 WATER ADDED Or~JOB AT~USTOMER'S REQUEST WATER ADDED TO THIS LOAD BY AUTHORITY OF YES NO CYLINDERS TAXEN [] ~ Invoices due and payable in Carrollton, Oall8s County. Texas, BEEGiN POUR FINISH POUR' LEAVE JO~' SITEARRIVE PLANT ~/:~ %,. f~ :'~,~ /~ '~ , ...:: ;.~; ~,'~' GAL Driv~-~ are not permitted to add water to the mix to exceed the maximum slump. Drivers are prohibited from delivering concrete except under the truck'S, own power, ar~ where site cOnditionS permit the safe and proper operation of his equipment. Drivers are not permitted to 9o beyond the curb line, except upon the authorization of the customer and his aoceptanCe of risk for any loss Or damage to the property or our equipment. TNs includes · Vt/4'/~Til"~ . towing charp.e., for.get:ing out ot the Iocatbn. E . 1 RECEIPT AND R~LEASE CORPDRRTION PRODUCT DESCRIPTION uNrr bF UNiT MSASURE PRICE ~000/M I X C CY AMOUriT 5UB :tOTAL TAX TOTAL ADDITIONAL'WATER ADDED TO THIS CONCRETE WiLL REDUbE ITS STRENGTH: ANY WATF_ZR AODED IN EXCESS OF1 LSPEC~FIEO SLUMP iS AT CUSTOMER'S RISK. Tar e _=r O Tare Zero Bat c h Rec or d: Yards:. 9.00 Yd Mi.x ID: 687. Bat.zh:. 2 of 2 Batch ~: 69 Truck ~:... 191 Driver:MIKE 1 9: 01 AM 22Feb96 Mix Des._-:. NAtGUN/C Aggregate Target Actual Status Moist Admix Target Actual Status Tare - 149 Pea Grav 10800 Lb 1100c) ~/OutTol 0.0% NW Sand 15566 Lb 16160~/OutTol 7.1% AIR Tar e Zero Cement Target Actual Status ]'are Zero C. em #1 5922 Lb 5900k/In Tol Tare Zero % % % ]'are Zero0 180 Oz {78/In Tol 22 Oz 22 In Tol Tar e Zero Water Target Actual Status Tare Zero Water -4 912 Lb 906w/in Tol Tare Zero /0..3.~~ +- ~06~= Bat c h Rec or d: Yards:. "B.00 Yd Mix ID: 718 Batch:v-1 of '1 Batch ~: 70 Truck #:... 124 Driver:ALLEN 4 9:17AM 22Feb96 Mix Desc:.4.5 SACK'ADMIX Aggregate Target ActUal' Status Mnist Tare Zero 1"Stone'*4 7360 Lb 7600 OutTol 0.0% Sand -4 6611Lb 6960 OutTol 6.9% % % % Tare Zero Cement Target Actual Status Tare Zero 'IA':~';' I h 19~=; O,,~T,-,1 Admix Target Actual Status Tare Zero AIR -4 6 Oz 6 In Tol NW -4 48 Oz 46 In Tol AC -5 0 Oz 0 In Tol Tare Zero Water Target Actual Status T ~v' ~ 7 ~v- .-.