RFI
Skyline High School Additions and Renovations Project # 1720200 7777 Forney Road Dallas, Texas 75227
Telephone:
RFI #: 032
December 29, 2010
Fax:
Date Created:
12/21/2010
Date Required: 12/28/2010
TO: Brent Kline
FROM: Michael Ward
Jacobs & Associates Architecture
Turner Construction Company
3737 Mapleshade Lane Plano, TX 75075
2001 N. Lamar, Suite 100 Dallas, TX 75202
Phone: 972-331-5699
Fax: 972-769-9634
Subject Cooling Tower Basin Agitator
Phone: 214.269.3309
Discipline Mechanical
Fax: 214.269.3315
Category Plan/Spec Discrepancies
Drawing References:
Spec Section References:
Dwg No. Rev No Revision Date Title
Sketch References:
Question: Please see the attached pricing and letter from Lassiter Inc. regarding the cooling tower basin agitator and advise. Cost Impact: Yes Schedule Impact: TBD Suggestion:
Answer:
Date Answered:
Signature: Cc:
Company Name AECOM B&H Engineers Jacobs & Associates Architecture Turner Construction Company Turner Construction Company
Date: Contact Name Gale Roberge James Barron Brent Kline Amelia Harlow William Tate
Copies 1 1 1 1 1
Fax Number 817-317-7781 972-899-0363 972-769-9634 214-721-8490 817-865-4011
Notes email email email email email
TCCo TCCO - RFI Individual Printout_V4.rpt RPT Revised: 9/16/2009
Turner Construction Company Page 1 of 1
.. .. .. .. .
December 10, 2010
Mr. Michael Ward Turner Construction Company 2001 North Lamar, Suite 100 Dallas, TX 75202 Subject: DISD BP023 – Skyline High School Additions and Renovations Re: PCR #8 – Cooling Tower Basin Water Agitator Michael, The attached pricing and shop drawing for the cooling tower basin agitator represents our proposed solution to obtain coverage for the concrete condenser water basin not shown on the contract drawings. Drawing sheet M1.1E2.2 shows the side centrifugal strainer station (CP-1) with an “L” shaped supply line and 3 nozzles extending into the ROTC section of the building. Clearly the background for this drawing is incorrect. This drawing also shows a short run of piping on the suction side of CP-1. Both of these service lines are referenced to note ten (10) re-stated below for ease of reference. “Provide 6” supply & return riser & distribution manifold/eductors per manufacturers recommendations for centrifugal strainer station” Based on the drawings and the now known size of the condenser water basin we believe the design showing a single manifold and 3 nozzles will not be sufficient to properly agitate the condenser water making the sediments water borne for the centrifugal strainer station. In compliance with the above note we are supplying PVC materials for the submerged manifolds and Pep Filters Interceptor sweeper heads in accordance with the manufacturers recommendations. Please forward this information to the Engineer of Record to gain approval for our proposed layout thus incorporating the layout into the design of the system. Should the Engineer of Record take exception to our layout please have them provide a design that adequately provides coverage for the condenser water basin. Sincerely,
Hal L. Ingram Construction Manager
............................
Lassiter Inc.
Change No.
8
6993 Fm 987 Terrell, TX 75160 972-962-7805 fax 972-962-7905
CHANGE ORDER Customer Turner Construction Company Date 12/10/2010 2001 N Lamar, Ste 100 Order No. 8 Dallas State ZIP 75202 Rep 972-668-9340 FOB Re: DISD BP 23 PCR 8 - Cooling Tower Basin Water Agetator
Name Address City Phone
Item
Description
QTY.
UNIT
LABOR
LABOR
MAT'L
MAT'L
SUB
SUB
UNIT
TOTAL
UNIT
TOTAL
UNIT
TOTAL
TOTAL
1
Delete Manifold per Contract Docs.
(8.0)
mh
$39.96
-$319.68
$3.99
-$31.92
$0.00
$0.00
-$351.60
2
Delete Manifold per Contract Docs.
(8.0)
mh
$29.60
-$236.80
$2.96
-$23.68
$0.00
$0.00
-$260.48
3
Delete Eductors per Contract Docs
(0.5)
mh
$39.96
-$19.98
$3.99
-$2.00
$0.00
$0.00
-$21.98
4
Delete Eductors per Contract Docs
(0.5)
mh
$29.60
-$14.80
$2.96
-$1.48
$0.00
$0.00
-$16.28
5
Delete Manifold material
(1.0)
ls
$0.00
$0.00
$464.17
-$464.17
$0.00
$0.00
-$464.17
6
Delete Eductors materials
(3.0)
ea
$0.00
$0.00
$111.91
-$335.73
$0.00
$0.00
-$335.73
7
Install Manifolds per Shop Drawing
24.0
mh
$39.96
$959.04
$3.99
$95.76
$0.00
$0.00
$1,054.80
8
Install Manifolds per Shop Drawing
24.0
mh
$29.60
$710.40
$2.96
$71.04
$0.00
$0.00
$781.44
9
Install Eductors per Shop Drawing
10.5
mh
$39.96
$419.58
$3.99
$41.90
$0.00
$0.00
$461.48
10
Install Eductors per Shop Drawing
10.5
mh
$29.60
$310.80
$2.96
$31.08
$0.00
$0.00
$341.88
11
Manifold materials per Shop Drawing
1.0
ls
$0.00
$0.00
$832.62
$832.62
$0.00
$0.00
$832.62
12
Eductors per Shop Drawing
1.0
ls
$0.00
$0.00
$2,350.00
$2,350.00
$0.00
$0.00
$2,350.00
13
Confined Space Sentry Equipment
(0.2)
wk
$0.00
$0.00
$2,400.00
-$480.00
$0.00
$0.00
-$480.00
14
Confined Space Sentry Equipment
0.9
wk
$0.00
$0.00
$2,400.00
$2,064.00
$0.00
$0.00
$2,064.00
15
Warehouse Forklift
0.0
wk
$0.00
$0.00
$550.00
$0.00
$0.00
$0.00
$0.00
16
AT Forklift
0.0
wk
$0.00
$0.00
$1,875.00
$0.00
$0.00
$0.00
$0.00
21
As-Builts/Close-Out
4.0
mh
$50.00
$200.00
$0.00
$0.00
$0.00
$0.00
$200.00
22
Punch List
2.0
mh
$50.00
$100.00
$0.00
$0.00
$0.00
$0.00
$100.00
23
Warranty
2.0
mh
$50.00
$100.00
$0.00
$0.00
$0.00
$0.00
$100.00
$0.00
$0.00
$0.00
$0.00
$0.00
$0.00
$2,208.56 $0.00 $4,147.42 $0.00 $0.00 Sub Totals Labor Burden $905.51 Total Labor $3,114.07 --------------------------------------------------------------------> 8.25% Taxes On Materials $311.38 $4,458.80 ----------------------------------> Total Materials Mark-up M/L ------------> Sub Total $0 Mark-up Sub Total Change
$6,355.98
37
PCR # 8
$3,114.07 $4,458.80 $757.29 $0 $0.00 $8,330.16
Page 1
3
M1.1E1-1
M1.1E1-1
Dallas Independent School District Bid Package # 23 Skyline High School Additions and Renovations
2
CONDENSER WATER BASIN/SUMP PIPING PLAN 1 1/4" = 1'-0"
Level 2 10' - 0"
Level 1 0' - 0"
4
CONDENSER WATER BASIN ISOMETRIC VIEW
CONDENSOR WATER BASIN ELEVATION VIEW 2 1/4" = 1'-0"
Level 2 10' - 0"
REVISIONS 1
Level 1 0' - 0"
2 3 4 5 6 7 8 9
CONDENSOR WATER BASIN ELEVATION VIEW 3 1/4" = 1'-0"
10 DATE :
12/8/2010 4:01:09 PM
SCALE :
1/4" = 1'-0"
BOILER ROOM CONDENSOR WATER SUMP/BASIN MECHANICAL PLAN SHEET
M1.1E1-1
Filtration Solutions Filtration, Separation and Adsorption Technologies
InterSeptor Series Sweeper Jet Systems Patent Pending
PEP introduces the newest sweeper jet designed specifically for cooling tower basins. In order for cooling tower filters to do an effective job removing solids contaminants from the cooling tower basin, solids must be directed toward the filter inlet. PEP’s new InterSeptor Sweeper Jet nozzles have a uniquely designed elliptical discharge outlet that directs basin water toward the filter inlet in a flat fan pattern. The elliptical pattern sweeps a much greater path width, achieving a significant reduction in stagnant areas between nozzles. By directing solids toward the filter system suction intake, an InterSeptor Sweeper Jet system is a cost effective method for preventing build-up of dirt, scale, airborne debris, sediment and other contaminants in cooling tower basins, sumps and machinery reservoirs. Using the venturi principle, Interceptor Sweeper Jets create a negative pressure region at the nozzle outlet, thereby inducing ambient water into the elliptical discharge. For every gallon of water pumped through the nozzle, five gallons of water are produced at the sweeper jet’s elliptical discharge. This permits use of a smaller pump to deliver the volume of water required for effective sweeping of solids to the filter inlet. InterSeptor Sweeper Jets are installed into a pipe
that runs along the cooling tower basin bottom. Clamp-on swivel mounts are available to direct the sweeping path into hard to reach areas and to accommodate irregular shaped basins. PEP designs sweeper jet systems tailored to the given application. Basin size and shape, liquid depth, competing flow characteristics, solids loading and other site specific criteria are examined for optimal flow and cleaning results. From there, PEP determines the correct sweeper jet size, quantity and placement. An InterSeptor Sweeper Jet system combined with a properly sized and fully integrated filtration system will assure cleaner water, reduced plugging and fouling, and improved heat transfer efficiency. Suspended particulate removal also optimizes chemical usage. With experience spanning over a quarter century, PEP Filters is a pioneer and industry leader in the design and manufacture of liquid / solids separation and filtration systems for commercial, industrial and municipal applications. PEP’s product line includes a wide range of multimedia filter systems, bag and cartridge filter systems and centrifugal separators. Activated carbon, organo clay and other media specific materials are also available for specialized applications.
PEP ISJ Sweeper Jet Sizing
Typical Sweeper Jet Installation
Sweeper Jet Selection Criteria For effective solids sweeping to the filter inlet piping, typically allow one gallon per minute of flow to the sweeper jets for every one square foot of cooling tower basin area. Sweeper jet spacing is typically 8 to 10 inches. Example: Basin area = 96 ft2 96 ft2 x 1 gpm/ft2 = 96 gpm to sweeper jet nozzles. For ISJ-250 sweeper jet rated at 5 gpm, 96 gpm/5 gpm per nozzle = 20 nozzles.
Sweeper Jets (typical) Filter inlet piping
SMF-30 Filter @ 96 gpm
Cooling Tower Basin (8 ft. long x 12 ft. wide)
For ISJ-375 sweeper jet rated at 8 gpm, 96 gpm/8 gpm per nozzle = 12 nozzles. Contact PEP for sweeper jet layout recommendations on a specific basin geometry.
PEP Filters • 322 Rolling Hill Road • Mooresville, NC 28117 • 800-243-4583 • www.pepfilters.com 704-662-3133 (Outside USA)
Fax 704-662-3155 rev. 01/02
6029 W. Campus Circle #100 Irving, Texas 75063 Ph: (972) 570-4700 Fax: (972) 570-4207
QUOTATION December 9, 2010 To: Lassiter, Inc Attn: Hal Ingram
2951 Northern Cross Blvd #201 Fort Worth, Texas 76137 Ph: (817) 281-6165 Fax: (817) 577-9787
Mechanical Engineer: B & H Engineers, Inc. Project: DISD BP #23 – Skyline Center PRICING SUMMARY DESCRIPTION
QTY
TAGGING
PEP InterSeptor Series nozzles
63
none NET PRICE
TOTAL PRICE
$2,350
Above price includes freight. Installation not included. Stan Perry Texas AirSystems, Inc
Page 1 of 1
12/10/2010
Quotation
NATIONAL WHOLESALE SUPPLY 2140 Franklin Dr Mesquite, TX 75150 972-288-1550 Fax 972-288-1755
EXPIRATION DATE
QUOTE NUMBER
01/23/2011
S1120345 PAGE NO.
NATIONAL WHOLESALE SUPPLY 2140 Franklin Dr Mesquite, TX 75150 972-288-1550 Fax 972-288-1755
1 of 1
SHIP TO:
QUOTE TO:
LASSITER, INC 6993 FM 987 TERRELL, TX 75160
CUSTOMER NUMBER
LASSITER INC - SKYLINE HS BP#23 7777 FORNEY RD DALLAS, TX 75227
CUSTOMER PO NUMBER
SALESPERSON
JOB NAME / RELEASE NUMBER
11567
WILLIAM BUTCHEE
WRITER
SHIP VIA
TERMS
SHIP DATE
FREIGHT ALLOWED
ROBERT MCCOY
BID
NET 10TH PROX
12/09/2010
No
ORDER QTY
2ea 4ea 2ea 1ea 1ea 1ea 2ea 40ft 80ft
DESCRIPTION
3 PVC SCH40 TEE 401-030 3 PVC SCH40 90 ELL 406-030 406-030 4 PVC SCH40 SLIP CAP 447-040 6 PVC SCH40 TEE 401-060 6 X 4 PVC SCH40 BUSHING SXS 437-532 4 X 3 PVC SCH40 BUSHING SXS 437-422 6 SCH80 PVC VANSTONE FLANGE 854-060 6" PVC SCH40 PIPE PLAIN END 3" PVC SCH40 PIPE PLAIN END
UNIT PRICE
9.120/ea
18.24
6.217/ea
24.87
6.943/ea
13.89
55.534/ea
55.53
16.709/ea
16.71
6.749/ea
6.75
49.000/ea
98.00
9.154/ft 2.906/ft
366.17 232.46
Subtotal S&H Charges Amount Due
Printed By: MCCROB on 12/9/2010 9:32:03 AM
EXT PRICE
832.62 0.00 832.62
