Search

, Cost Qty;
Line No| Code Description Type / Rate / Hrs} Workers Ext
Conduit and pull
006 i mm ang PO" | Material $420.00 1.00 -| $420.00
x

007 Subcontractor Subcontractor $0.00 0.00 - $0.00
Breakout

Labor : $1,955.00

Gross Margin Percent @ 15%: $293.25

Material : $630.00

Gross Margin Percent @ 15%: $94.50

Total: $2,972.75

Reservation of Rights

This COR does not include any amount for impacts such as interference, disruptions, rescheduling, changes in the
sequence of work, delays and/or associated acceleration. We expressly reserve the right to submit our request for

any of these items.

Dated: 12/29/2017

Signed By:

Electrical
i_i-y. Installations, Inc.

Engineering -Cormtruction - Contre! Systems

iene VT License EM-2667

Potential Change Order Request

MAIN OFFICE

387 Whittier Highway
Moultonboro, NH 03254

603-253-4525
FAX 603-253-6284

BRANCH OFFICE

$306 American Legion Hwy
Westport, MA 02790
§08-636-8500

FAX 508-636-3650

ME License 7905 NHLicense 46C 4 License 221MR

1613 — Nashua, NH for T Buck - WWTF Headworks Upgrade -

PCO Subject: Extra fire alarm parts

Elect-Controls needed
To Bruce Kenny PCO Number: 1613-015
T.Buck Construction, Inc. PCO Revision Number: 0
302B Auburn Road PCO Date: 12/29/2017
Turner, Maine 04282 Work Type : Price / Proceed
207-783-6223
207-783-3970 (FAX) Valid for 5 Days.
Return To Chuck Fritz
Electrical Installations, Inc.
245 Charlotte Street
Manchester, NH 03103
603-520-0513
935-7862 (FAX)
chuck. fritz@eii-hq.com
Comments / Time Extension Request
this will require extra time on the contract
Details
Line Cost Qty :
No. Code © Description | Type / Rate | /Hrs| Workers. Ext
0—Electrical Field 15.00
001 eas | Electrician Labor $95.00 2.00| $2,850.00
Labor Onsite Hrs
— i i 0.00
002 2 Instrumentation Engineer Labor $110.00 1.00 $0.00
Field Labor Onsite | Programmer Hrs
: 0.00
003 5—Panel Shop Panel Shop Labor $65.00 hrs 1.00 $0.00
4—Submittals/O&M's 1.00
Clerical Lab 55.00 1.00 55.00
004 | /Clericat/Office erica aor , Hrs ;
EST BOOSTER, 8 .
005 Material $3,471.00 1.00 - | $3,471.00

Line Cost Qty
No Code Description Type / Rate /Hrs| Workers Ext
AH BATTERY,
GAMEWELL FCI
SMOKE WITH BASE
(AT BOOSTERS),
WHEELOCK SYNCH
MODULE, Setup
and test
Conduit and pull
006 oneum ana Pu" | Material $230.00 1.00 -| $230.00
box
007 Subcontractor Subcontractor $0.00 0.00 - $0.00
Breakout
Labor : $2,905.00
Gross Margin Percent @ 15%: $435.75
Material : $3,701.00
Gross Margin Percent @ 15%: $555.15

Total: $7,596.90

Reservation of Rights

This COR does not include any amount for impacts such as interference, disruptions, rescheduling, changes in the
sequence of work, delays and/or associated acceleration. We expressly reserve the right to submit our request for

any of these items.

Signed By:

Dated: 12/29/2017

B) THE CITY OF NASHUA “The Cate City

Financtal Services

Purchasing Department

February 15, 2018
Memo #18-085

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: DIGESTER CLEANING PROJECT -—- CHANGE ORDER #2 (VALUE: NOT-TO-EXCEED

$100,000)
DEPARTMENT: 169 WASTEWATER; FUND: WASTEWATER

Please see the attached communication from David L. Boucher, Superintendent Wastewater Department
dated February 8, 2018 for the information related to this purchase.

Pursuant to § 5-78 Major purchases (greater than $10,000) A. All supplies and contractual services,
except as otherwise provided herein, when the estimated cost thereof shall exceed $10,000 shall be
purchased by formal, written contract from the lowest responsible bidder, after due notice inviting bids.

The Superintendent Wastewater Department, the Board of Public Works (2/8/2018 meeting) and the
Purchasing Department recommend the approval of this Change Order #2 in an amount not-to-exceed
$100,000 to Denali Water Solutions of Russeliville, AR.

Respectfully,

an Kooken
Purchasing Manager

Ce: D Boucher L Fautuex

t t
229 Main Street * Nashua, New Hampshire 03061 Phone (603) 589-3330 e Fax (603) 589-3233 |

H. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: February 8, 2018

David L. Boucher, Superintendent
Wastewater Department

Digester Cleaning Project

To approve change order 2 to the Digester Cleaning project with Denali Water
Solutions in the amount not to exceed $100,000. Funding will be through:
Department: 169 Wastewater; Fund: Wastewater;.Account Category: 81 Building
Improvements.

Denali Water Solutions Estimated Quantities to Complete Cleaning

The cleaning of the primary and secondary digesters at the Nashua Wastewater

_ Treatment Facility was sent out to bid in July 2017 with Denali Water Solutions

the low bidder at a cost of $237,310. Change order 1, for $48,400, was approved
by the BPW on October 26™ for the contractor to provide odor control of
undigested sludge by adding chemicals. The new contract total is currently
$285,710.

During initial meetings with Denali, they estimated to complete the digester
cleaning in a period of six weeks. However, there were delays encountered in
equipment and lines freezing as a result of the extreme cold weather encountered
from December 20th to January 12". The dewatering took much longer to
complete due to the cold weather and holiday shutdowns. The estimated
completion date for cleaning both digesters is now February 3". In addition, their
services will be needed to keep dewatering the incoming sludge before filling the
primary digester in order to inspect the inside of the digester and change valves at
the base of it that are not properly sealing.

This change order will be for an additional $100,000 which will include
dewatering sludge before startup for vessel inspection and valve replacement.
The new contract amount will be $385,710. The contractor will be paid as normal
for what they actually dewater on a dry ton basis. Although costs have increased
the overall cost is still below the original estimate of $750,000 as a result of the
contractor setting up at single location to dewater both the incoming sludge and
sludge in the digesters.

Nashua Digester Cleaning Contract 2017 -2018

Sample ID Date
1 T28 22.38
2 12/1/2017 T38 24.38
3 12/4/2017 cvel 25.14
4 12/5/2017 T36 23.99
5 12/6/2017 T37 23.28
6 12/6/2017 cve2 25.22
7 12/7/2017 T41 24772
8 12/7/2017 728 25.48
9 12/8/2017 T39 25.07
10 12/8/2017 137 27.54
11 12/9/2017 T41 22.83
12 12/11/2017 T40 28.75
13 12/11/2017 T16 22.29
14 12/12/2017 54.60
15 12/12/2017 7122 22.53
16 12/13/2017 T35 22.87
17 34.91
18 12/13/2017 T24 25.13
19 12/14/2017 T41 53.92
20 12/14/2017 T128 25.08
21 12/15/2017 T28 21.73
22 16.93
23 12/18/2017 7129 24.21
24 12/19/2017 T38 23.76
25 12/19/2017 22.25
26 12/20/2017 T16 55.68
27 12/21/2017 t 28 44,94
28 12/22/2017 TGVE1 23.62
29 12/22/2017 t 36 28.64
30 12/26/2017 t38 29.03
31 t16 27.33
32 12/28/2017 t 36 41.35
33 12/29/2017 t30 45.13
34 t16 22.40
35 24.00
36 24.00
37 1/3/2018 t 16 23.90
38 1/3/2018 t38 23.20
Monthly total 1082.22
Monthly average 28.48

Dewatering Dec total

Mobilization

Generator

crane

Cost to dewater incoming sludge = $309/ton
Cost to dewater digested siduge = $389/ton

21.18
32.11
30.3
33.92
33.66
33.73
30.85
28.83
27.76
29.72
32.56
28.1
31.57
31.49
31.61
34.69
30.93
34.03
30.57
30.61
28.83
29.35
33.62
31.37
29.65
31.58
35.12
29.27
34.32
38.4
33.07
31.33
29.66
30.4
29.45
29.59
30.24
27.87
1181.34

Trailer 1% solids Wettons Drytons Type

4.74 PF
7.83 PF
7.62 PF
8.14 PF
7.84 PF

8.51 PF
7.62 Pe

eve ws

7.35 PF

6.96 PF

8.18 PF

7.43 PF

8.08 PF

7.04 PF
17.19 Cleaning
7.12 PF

7.93 PF
10.80 Cleaning
8.55 PF
16.48 Cleaning
7.68 PF

6.26 PF

4.97 PF

8.14 PF

7.45 PF

6.60 PF
17.58 Cleaning
15.78 Cleaning
6.91 PF

9.83 PF
11.15 PF

9.04 PF
12.95 Cleaning
13.39 Cleaning
6.81 PF

7.07 PF

7.10 PF

7.23 PF

6.47 PF

337.82
8.89

Billing
amount

S 309.00
S 309.00
S 309.00
$ 309.00
$ 309.00
$ 309.00

¢ 2n0 09
-

wus

§ 309.00
§ 309.00
§ 309.00
S 309.00
5 309.00
§ 309.00
S 389.00
§ 309.00
$ 309.00
§ 389.00
§ 309.00
§ 389.00
§ 309.00
$ 309.00
§ 309.00
§ 309.00
5 309.00
$ 309.00
$ 389.00
§ 389.00
§ 309.00
S 309.00
§ 309.00
§ 309.00
$ 389.00
$ 389.00
§ 309.00
§ 309.00
$ 309.00
§ 309.00
$ 309.00

Total

1,464.69
2,418.98
2,353.78
2,514.46
2,421.34
2,628.57
2,357.42
2,269.88
2,150.46
2,529.13
2,296.94
2,496.33
2,174.42
6,688.29
2,200.62
2,451.48
4,200.29
2,642.49
6,412.02
2,372.19
1,935.81
1,535.41
2,515.08
2,303.14
2,038.51
6,840.08
6,139.56
2,136.29
3,037.24
3,444.58
2,792.75
5,039.48
5,206.98
2,104.17
2,184.01
2,194.39
2,233.25
1,997.94

Wn MnNYywMm YUN YUYNYhYH HY YNna neh YY HHH HH HOH

$ 110,724.51

$ 19,110.00
S 5,200.00
S$ 6,300.00

$ 141,334.51

January
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

subtotal to date ( Figure in gray (from Jan. 20 -Feb. 3) are based on estimated quantities):

Monthly Total
Monthly Average

Total Denali costs to end of cleaing (Feb. 3rd):
Original Contract(not including the $48,400 for chemical! odor control):

Estimated Shortfall:

1/3/2018 t 36
1/4/2018 t 35
1/4/2018 t121
1/5/2018 36
1/5/2018 t16
1/8/2018 +35
1/9/2018 t104
1/9/2018 t40
1/9/2018 t104
1/10/2018 t35
1/11/2018 t38
1/11/2018 t104
1/11/2018 t40
1/12/2018 t37
1/15/2018 t104
1/15/2018 t40
1/16/2018 t37

1/16/2018 t38 _

1/17/2018 t120
1/17/2018 t104
1/18/2018 t40
1/18/2018 t37

1/18/2018 ti21

1/19/2018 t104
1/19/2018 t37
1/20/2018 127
1/21/2018
1/22/2018
1/23/2018
1/24/2018
1/25/2018
1/26/2018
1/27/2018
1/28/2018
1/29/2018
1/30/2018
1/31/2018
2/1/2018
2/2/2018
2/3/2018

Additonal Costs for Startup:
total Change Order Amount:

25 32.5 8.13 PF
26.9 32.2 8.66 PF
27.3 31.78 8.68 PF
25.9 35.8 9.27 PF

23 24.44 5.62 PF
25.1 31.9 8.01 PF
22.9 38.94 8.92 PF
28.9 27.89 8.06 PF
21.6 37.45 8.09 PF
42.8 21.8 9.33 Cleaning
23.7 31.64 7.50 PF
32.1 34.41 11.05 PF
22.6 31.27 7.07 PF
39.4 35.25 13.89 PF
26.5 36.75 9.74 PF
27.8 28.77 8.00 PF
23.5 31.74 7.46 PF
23.3 32.43 7.56 PF
60.3 37.92 22.87 Cleaning
55.4 14.04 7.78 Cleaning
23.8 32.19 7.66 PF
55.6 29.78 16.56 PF
28.6 32.23 9.22 PF

0.00
49.5 31.89 16.99 Cleaning
23.2 34.32 7.96 PF

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

30 65 19.50

1234.7. 1764.33 536.54
49.388 70.5732 21.46

§ 309.00
$ 309.00
$ 309.00
§ 309.00
$ 309.00
$ 309.00
$ 309.00
§ 309.00
$ 309.00
$ 389.00
§ 309.00
$ 309.00
$ 309.00
$ 389.00
§ 309.00
$ 309.00
$ 309.00
§ 309.00
$ 389.00
S 389.00
$ 309.00
§ 389.00

$ 309.00

$ 389.00
$ 309.00
$ 309.00
$ 309.00
$ 309.00
$ 309.00
$ 309.00
§ 389.00
§ 389.00
$ 389.00
$ 389.00
§ 389.00
§ 389.00
§ 389.00
§ 389.00
§ 389.00
§ 389.00

2,510.63
2,676.50
2,680.87
2,865.11
1,736.95
2,474.13
2,755.43
2,490.60
2,499.56
3,629.53
2,317.09
3,413.09
2,183.71
5,402.63
3,009.27
2,471.40
2,304.80
2,334.86
8,894.78
3,025.70
2,367.32
6,440.94

yvuiyn ow ynyNyuwn yu YY YM HHH OM UH YH In

2,848.29
6,608.49
2,460.33
6,025.50
6,025.50
6,025.50
6,025.50
6,025.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
7,585.50
188,384.52

wnuYuM YY HK MHHHh HY HHH OH mH

§ 329,719.03
$237,310.00
$ 92,409.03
$7,500
$ 99,909.03
$100,000

CHANGE ORDER

No.2
PROJECT: Primary and Secondary Digesters Cleaning
OWNER’S CONTRACT NO: IFB0285-083117
EXECUTED CONTRACT DATE: _ October 20, 2017
DATE OF ISSUANCE: ___ February 15, 2018 EFFECTIVE DATE: Upon City Approval

OWNER: City of Nashua, NH
OWNER’s Purchase Order NO.: 137375

CONTRACTOR: Denali Water Solutions

You are directed to make the following changes in the Contract Documents:

Description: Additional services include to keep dewatering the incoming sludge before filling the
primary digester in order to inspect the inside of the digester and change valves at the base of it that are
not properly sealing, and dewatering sludge before startup for vessel inspection and valve
replacement.

Attachments: Denali Water Solutions proposal.

Change Order # 2 1 of 2
IFB0285-083117
Primary and Secondary Digesters Cleaning

Summary

CHANGE IN CONTRACT PRICE:

Original Contract Price

$237,310

CHANGE IN CONTRACT TIMES:
Original Contract Times

Net changes from previous Change Orders

$48,400

Net change from previous Change Orders

Contract Price prior to this Change Order

$285,710

Contract Times prior to this Change Order

Net Increase (decrease) of this Change Order

$100,000

Net Increase (deerease} of this Change Order

Contract Price with all approved Change Orders

Contract Times with all approved Change Orders

$421,710
RECOMMENDED: ACCEPTED: APPROVED:
By: By: By:
DPW Name Mayor Jim Donchess
Engineering Contractor Owner

(Authorized Signature)

Date:

(Authorized Signature)

Date:

(Authorized Signature)

Date:

Change Order # 2
IFB0285-083117

2 of 2

Primary and Secondary Digesters Cleaning

Jim Donchess
Mayor e City of Nashua

To: Board of Aidermen

Filed With: Patricia Piecuch, City Clerk

From: Jim Donchess
Date: February 2, 2018
Re: Emergency PO Request — Emergency Sewer Repair at 38 Bridge Street

Pursuant to 5-90 (G) of the NRO, | have authorized an Emergency Purchase Order to W. F. Grace
Construction, LLC for an amount not to exceed $35,000.

By way of background, a 15” sewer pipe installed in 1887 through property owned by Liberty
Utilities in the Bridge Street area has collapsed causing a significant sinkhole on the property. This
sewer serves the neighborhood consisting of Van Buren Street, Warren Street, Jackson Street and

a short section of Bridge Street.

The site is listed by the NHDES as contaminated and special precautions are
necessary to conduct the work. Liberty Utilities is assisting the City to have the
repairs made promptly.

Included is a copy of the vendor’s insurance certificate and a memo from Steve
Dookran, P.E., City Engineering explaining the need for this work which if
approved, is planned for Saturday, February 3, 2018.

Thank you,
CC: DPW Administration

229 Main Street » PO Box 2019 * Nashua, New Hampshire 03061-2019
603.589.3260 ° fax 603.594.3450 * NashuaMayor@NashuaNH.gov
www.NashuaNH. gov