NOTICE
TO PLAN HOLDERS
FOR CONSTRUCTION OF
CENTRAL
DISPOSAL SITE
LEACHATE & COMPRESSED LANDFILL GAS
PIPELINES PROJECT
COUNTY PROJECT NO. W06985
ADDENDUM
NO. 1
The
following changes are hereby deemed to be a part of the
Contract Documents in full effect as if originally
included.
GENERAL-
DIVISION I-BIDDING REQUIREMENTS
1. Table of Contents,
pages 1 & 2, change "SECTION" to
"DOCUMENT."
2. Document
00100, paragraph 2, first sentence: REPLACE "3.8
miles" with "4.7 miles."
3. Document
00100, paragraph 2, second sentence: REPLACE
"4,800" with "840 feet of."
4. Document 00100, paragraph 12: DELETE paragraph and
REPLACE WITH "Work
shall be completed NO LATER THAN NOVEMBER 1, 2005."
5. Document 00400, Paragraph 4, Schedule of Bid
Prices, Item 4, AMEND
description to read "8-inch HDPE Single Containment
Pipe, Fittings (DR 13.5)."
6. Document 00400, Paragraph 4, Schedule of Bid Prices Item 5, AMEND description
to read "HDPE
Dual Containment Pipe, Fittings and Valves (DR
13.5 DR11)."
7. Document 00400, Paragraph 4, Schedule of Bid Prices Item
5, REPLACE linear foot quantity of 24,361 with 25,000.
8. Document 00400, Paragraph 4, Schedule of Bid Prices, Item
17, REPLACE quantity of three (3) with quantity of two
(2).
9. Document 00400, Paragraph 4, Schedule of Bid Prices Item 28, AMEND description
to read "8-inch HDPE Water Line (AWWA C900
Class 200 or C906 Class 200 DR 9)."
10. Document 00400, Paragraph 4, Schedule of Bid Prices: ADD Bid Item 37,
Hazardous Waste Disposal: Quantity is 50,000, Unit is
FA, Unit Price shall be $1.00, Total Cost shall be
$50,000.
11. Document 00400, Paragraph 4, Schedule of Bid Prices: ADD Bid Item 38,
Demolish Asphalt Concrete Pavement: Quantity is 940,
Unit is SF.
12. Document 00400, Paragraph 4, Schedule of Bid Prices: ADD Bid Item 39,
6-inch HDPE Pipe (Heavy Metal Removal Plant): Quantity
is 850, Unit is LF.
13. Document 00400, Paragraph 4, Schedule of Bid Prices: ADD Bid Item 40, Check Valve-Ductile Iron,
Quantity is 1, Unit is EA.
14. Delete Document 00400, "Schedule of Bid Prices," and ADD
new revised "Schedule of Bid Prices" as
attached.
DIVISION
II-CONTRACTING REQUIREMENTS
1. Document 00520, Article 3.1, second paragraph,
last sentence: DELETE sentence and REPLACE WITH "Contractor
shall achieve Final Completion of the entire Work and be
ready for Final Payment in accordance with Document
01780 (Project Record Drawings) by November 1, 2005 as
provided in Document 00700 (General Conditions)."
2. Document 00520, Article 4, Schedule of Bid Prices,
Item 4, AMEND description to read "8-inch HDPE
Single Containment Pipe, Fittings (DR 13.5)."
3. Document 00520, Article 4, Schedule of Bid Prices Item 5, AMEND description
to read "HDPE
Dual Containment Pipe, Fittings and Valves (DR 13.5 DR11)."
4. Document 00520, Article 4, Schedule of Bid Prices
Item 5, REPLACE linear foot quantity of 24,361 with 25,000.
5. Document 00520, Article 4, Paragraph 4.1, Item
28, AMEND description to read "8-inch HDPE Water Line (AWWA C900
Class 200 or C906 Class 200 DR 9)."
6. Document 00520, Article 4, Schedule of Bid
Prices: ADD Bid Item 37, Hazardous Waste Disposal:
Quantity is 50,000, Unit is FA, Unit Price shall be
$1.00, Total Cost shall be $50,000.
7. Document 00520, Article 4, Schedule of Bid
Prices, Item 17, REPLACE quantity of three (3) with
quantity of two (2).
8. Document 00520, Article 4, Schedule of Bid
Prices: ADD Bid Item 38, Demolish Asphalt Concrete
Pavement: Quantity is 940, Unit is SF.
9. Document 00520, Article 4, Schedule of Bid
Prices: ADD Bid Item 39, 6-inch HDPE Pipe (Heavy Metal
Removal Plant): Quantity is 850, Unit is LF.
10. Document 00520, Article 4, Schedule of Bid
Prices: ADD
Bid Item 40, Check Valve-Ductile Iron, Quantity if 1,
Unit is EA.
11. Document 00550: CLARIFICATION: Final Completion
shall be November 1, 2005.
DIVISION
III-CONDITIONS OF THE CONTRACT
DIVISION
IV-TECHNICAL SPECIFICATIONS
1. All references to Construction Quality Assurance
(CQA) Consultant shall mean the County.
2. All references to Construction Quality Assurance
(CQA) Plan shall refer to Document 01450, Quality
Control, unless otherwise stated below:
a. Document 02210, paragraph 1.1C: DELETE paragraph
and REPLACE WITH "Review
with County in the field the location, limits, and
method to be used prior to commencing the work under
this section"
b. Document 02210, paragraph 1.5: DELETE paragraph.
c. Document 02300, paragraph 3.3A: DELETE paragraph
and REPLACE WITH "Placement of the soil shall not commence until quality control
conformance evaluations by the County of previous work
are complete, including evaluations of the Contractor's
survey results to confirm that the previous work was
constructed to the required grades, elevations, and thicknesses. Should the Contractor begin the work
on this section prior to the completion of quality
control and County evaluations, he does so at his own
risk. The Contractor shall account for the quality
control conformance evaluation in his schedule."
d. Document 02510, paragraph 1.4D: DELETE paragraph
and REPLACE WITH "The installation of pipe and fittings will be monitored by the
Engineer."
e. Document 02510, paragraph 1.4E: DELETE paragraph.
f. Document 02510, paragraph 1.5I: ADD sentence to
end of paragraph "Fusion equipment shall be operated only by technicians who have
been certified by the pipe manufacturer or supplier and
who have a minimum of five (5) years of experience
fusion welding 8-inch or larger diameter pipelines. The
technician's experience shall be documented in the
HDPE pipe submittal, including a current (within the
past three years) training certificate."
g. Document 02515, paragraph 1.4D: DELETE paragraph
and REPLACE WITH "The installation of pipe and fittings will be monitored by the
Engineer."
h. Document 02515, paragraph 1.4E: DELETE paragraph.
i. Document 02530, paragraph 1.4D: DELETE paragraph
and REPLACE WITH "The installation of pipe and fittings will be monitored by the
Engineer."
j. Document 02530, paragraph 1.4E: DELETE paragraph.
3. Document 01270, paragraph 2.28, AMEND title to
read "INSTALL HDPE WATER LINE" (Bid
Item No. 28).
4. Document 01270, paragraph 2.28B, AMEND last
sentence to read "named in the Bid Form under Item No. 28, Install HDPE Water
Line."
5. Document 01270, ADD paragraph 2.37, Hazardous
Waste Disposal (Bid Item No. 37),
with the following two parts:
a. Hazardous Waste Disposal shall not be
measured.
b. Payment for hazardous material disposal shall be
performed on a force account basis for all work
associated with removing and disposing of unknown
hazardous waste or contaminated material affecting
project.
6. Document 01270, ADD paragraph 2.38, Demolish Asphalt
Concrete Pavement (Bid Item No. 38), with the following
two paragraphs:
a. Measurement for payment of Demolish Asphalt
Concrete Pavement shall based on removal and disposal of
existing asphalt concrete pavement at the Pump Station
No. 2 location, prior to the installation of the pump
station.
b. Payment for demolishing asphalt concrete pavement
shall be made a the bid price for square foot named in
the Bid Form under Item No. 38, Demolish Asphalt
Concrete Pavement, for all such work as required by the
Contract Documents.
7. Document 01270, ADD paragraph 2.39, 6-inch HDPE
Pipe (Heavy Metal Removal Plant) (Bid Item No. 39), with
the following two paragraphs:
a. Measurement for this item shall be by the linear
foot for the actual amount of pipe bends, and
appurtenances placed as measured along the lines
constructed. Measurement shall be along the centerline
of the pipe through the bends, tees, and valves and
conform to paragraph 1.1B, "Scope," of this
section.
b. Payment shall include full compensation for all
materials, labor and equipment necessary to furnish and
install the pipe complete in place as shown on the Plans
and specified, including (but not limited to) minor
clearing and grubbing, location of utilities,
excavation, trench shoring and bracing, bedding,
installation of pipe tie-ins, cover material, all
concrete, controlled low strength material, thrust
blocks or restrained joints, control of grade,
compaction of bedding and cover, control of groundwater,
backfilling and compaction, ditch regrading, testing,
flushing, restoration of road section, including
compaction and cleanup, as named in the Bid Form under
Item No 39, 6-inch HDPE Pipe.
8. Document 01270, ADD paragraph 2.40, Check
Valve-Ductile Iron, (Bid Item No. 40) with the following
two paragraphs:
a. Measurement
for payment for the ductile iron check valves, valve
boxes and appurtenances, as shown on the contract
drawings, shall be based upon installation of the valve,
box, and appurtenances per paragraph 1.1B,
"Scope," of this section.
b. Payment for ductile iron check valves shall be
made at the bid price for each unit named in the Bid
Form under Item No. 40 Check Valve-Ductile for all such
work as required per the Contract Documents.
9. Document 02740, paragraph 1.3, ADD paragraph 1.3C, "California
Stormwater Quality Association, Stormwater Best
Management Practice Handbook."
10. Document 02740, paragraph 3.7, ADD paragraph 3.7B, "Vacuum
saw-cut slurry and remove from site. Cover or barricade
storm drains and drainage ditches during sawcutting to
contain slurry."
PLANS-
1. CLARIFICATION: Survey control points (symbols,
point number, coordinates and descriptions) are shown on
drawing G005. Symbols
for the control points are shown on the project plan and
profile sheets.
2. The following project drawings are reissued with
this Addendum:
· C105
· C127
· C132
· C159
· C501
· C502
· C503
· C506
· S001
RESPONSES
TO WRITTEN QUESTIONS-
Question 1. Specification #02510, Water Distribution: The spec allows the use of either PVC CL200 C900 or HDPE
SDR-9 fusion pipe. Your bid sheet only references HDPE. Based on the written spec, can we use either?
Answer: The water line can either
be PVC or HDPE, meeting the requirements of Section
02510.
Question 2. Specification #13850, Leak Detection: Our suppliers have indicated a number of issues
with this system. Due
to the dual system, condensation builds up in the casing
pipe and sends false readings to the leak detection
system. This
could be a problem down the road. How does the County expect to handle this issue?
Answer:
Condensation can be drained after initial assembly of
the piping system. Leak detection sensitivity can be
adjusted to eliminate false alarms from small pockets of
condensation.
Question 3. Specification #02001, Field screening of Potentially contaminated
soil/ground water: It appears this section is related to the gas
main which in NIC. Should we be concerned with this requirement for the current
project?
Answer:
During County discussions, Caltrans reported: "The
subsurface sampling by Caltrans District 3 at the
intersection of Stony Point Road and Highway 116
detected low levels of dissolved gasoline contamination.
The reported concentrations were below the Department of
Health Standards for drinking water." Contractor shall include field screening the soil
excavated which is associated with bore and jack
operations, including excavation of the jacking pits.
Question 4. Can excess spoil be disposed of at Mecham Dumps at no cost since this is
a County project? Additionally,
soils have been tested already by Taber Consultants, who
could supply these results directly to the landfill to
avoid the testing requirements.
Answer: The Central Disposal Site
will accept the disposal of project soils, at no cost to
the Contractor, if the soils are shown to meet the soil
quality requirements of the Central Disposal Site. Taber
performed geotechnical investigations of the pipeline
alignment to provide recommendations for design. Taber
did not precharacterize the soil for disposal at a
landfill. The Contractor shall be responsible for
coordinating and testing of soil for disposal as
included in the various items paid for the work.
Question 5. Plan sheet C158 identifies to 8" single containment and 6"
HDPE heavy metal pipeline. What bid item identifies the 6" HDPE heavy
removal pipeline? Can
the 8" single containment and 6" HDPE heavy
metal be installed in a joint trench? If so, please provide a detail for the joint trench.
Answer:
Bid item for the 6-inch HDPE heavy metal pipeline has
been added as part of this addendum. Yes, the 8"
HDPE and 6" HDPE can be placed in a joint trench. A
detail is provided as part of this addendum.
Question 6. Plan sheet C159 contains the pump station plan sites: What are the "pay limits" for each pump
station? Pump
station #1 references 8" Ball Valve and another
ball valve (without size) PRV vault. In what bid item # do we include the 8" ball
valve and ball valve & PRV Vault? Please provide a detail for the size of the ball
valve & vault.
Answer:
Pay limits for the pump station shall include all work
between the end of the section piping through the pump
station, to and including the 8-inch check valve. 8-inch ball valve shall be paid for under Bid
Item No. 4. Ball valve associated with PRV is specified
in Section 11610 and paid for under Bid Item No. 24,
Refrigerated Sampling Station. PRV Vault shall be a
Christy box as specified on sheet C159. Diagram included
with the addendum shows intent of PRV, vault, ball valve
and its relationship to the sampling station. (See
attached Sheet 1, Sampling Station clarification)
Question 7. Plan sheet C502, Leachate air break vault detail (2). A note references a protective lining for
concrete vault walls. Please specify what is required for protective
lining.
Answer:
Detail for the leachate air break vault has been removed
in this addendum. See new detail for leachate air
release valve.
Question 8. Plan Sheet C105/C153 (detail (1) notes to abandon the existing 6"
ACP WL in place). We
understand the Leachate pipe will remove the existing
6" WL due to the alignment. Although the new 8" WL parallels the
existing main. Can
the existing 6" WL be abandoned in place where the
line is parallel in place of removal and disposal?
Answer:
New 8-inch water line is to be installed on the easterly
side of the road. Existing waterline is located on the
westerly side of the road. Existing 6-inch ACP water
main, not in conflict with the leachate pipeline, as
design, can be abandoned in place. Abandoned pipe shall have ends plugged with
concrete for the first 2 feet of the pipe, each end.
Abandoned valves shall be closed and have the valve box
and cover removed. Contractor shall not relocate
leachate pipe to avoid ACP demolition. Demolition and
removal of exiting valves shall be included in Bid Item
No 27, Demolish Existing 6-inch Water Line.
Question 9. ESA temporary fence: G004
requires ESA temp fencing adjacent to edge of roads. In Pre-bid meeting discussions about installing ESA fence
only in specific areas as required. Please clarify stations where ESA temporary fence
is required.
Answer:
ESA temporary fencing will be required adjacent to ESA
areas shown on the drawings. ESAs are shaded on the
drawings sheets. Contractor can anticipate at least 100
feet of temporary fencing will be required on each side
crossing water ways or creeks.
Question 10. Plan Sheet C505, detail #3, flow meter: This detail indicates (2) two each pressure gauge assemblies
mounted on the 8" dip. Please clarify the MFGR and gauge reading ranges
for these pressure gauges.
Answer:
Pressure gauges shall be Ashcroft, Wika, or equivalent.
Gauges shall be specifically designed for corrosive
environments, diaphragm type, liquid filled, with 316
stainless steel case, tubes and movement. Pressure
readings from 0 to 60 psi.
Question 11. Plan Sheet C154 indicates a 1 ½" water service to be reconnected
off the new 8" water main. In which bid item do we include the 1 ½"
water service and reconnect?
Answer:
1 ½-inch water service to be included in the unit price
paid under Bid Item 28, 8-inch Water Line.
Question 12. Plan Sheet C502, Detail 2 Leachate Air Break. Please clarify size of vault required for leachate air break.
Answer: Detail removed and replaced as part of this Addendum.
Question 13. Please clarify how the dual containment pipeline with the steel casing
is paid for. We
believe it is covered under the dual containment bid
item but we are not sure, please clarify.
Answer:
The cost of the HDPE dual containment pipe through all
steel casings will be paid for in the linear foot price
Bid for Item 5, HDPE Dual Containment Pipe and Fittings.
The cost of furnishing and installing the steel casings and all other work associated with the steel
casings will be paid for in Bid Item 8, Bore & Jack
Under Crossing-Leachate; Item 9, Open Cut Casing
Installation-Leachate; and Item 10, Bridge Crossings.
Please fill out the Addendum section of the Bid Form
[Division I, Section 00400, Page 1, 3(a)] acknowledging
receipt of this Addendum No. 1.
DAVID D. KNIGHT, DIRECTOR
DEPARTMENT OF TRANSPORTATION
AND PUBLIC WORKS
Randy
Forbes
Randy Forbes
Project Manager
Measure M