July 2010 - 1 - 1643

DATE: July 7, 2010

ADDENDUM NUMBER: 1

MODIFYING: Specifications No. 1643

PROJECT: Diemer Emergency Broadcast System Rehabilitation

BID TIME AND DATE: 2:00 p.m., July 19, 2010

FROM: THE METROPOLITAN WATER DISTRICT OF SOUTHERN CALIFORNIA

700 North Alameda Street, Third Floor

Los Angeles, California 90012

(213) 217-6515

TO: All prospective bidders

This addendum forms a part of the contract documents. Use Specifications No. 1643 as originally issued to

submit bids, in conjunction with this addendum, and acknowledge receipt of this addendum by completing

Document 00420, “Bidder's General Information,” in the specifications.

This addendum consists of 3 pages of text and 7 sheets of 11” x 17” drawings.

CHANGES TO BIDDING REQUIREMENTS:

1. Change the date for the opening of bids from July 14, 2010 to July 19, 2010.

CHANGES TO SPECIFICATIONS:

2. In Section 01510, “Temporary Utilities and Services,” at the end of Paragraph 1.04B, add the following

Paragraph 1.04C:

C. Subject to Engineer’s approval, the Contractor may plug in to 110v power outlet inside buildings when

available. The work shall be no more than 50 feet of the available power outlet. The Contractor shall ensure

that use of the power outlet does not interfere with Metropolitan operations. Installation of hard wires will

not be permitted.

3. In Section 16050, “Basic Electrical Materials and Methods,” at the end of subparagraph 3.02B.2, add the following subparagraph 3.02B.3

4. When core drilling of walls, beams, columns, or other structural member is necessary for the installation of

conduits, the Contractor shall perform x-ray or ground penetration scan and plot the location of existing

rebars and/or conduits onto the concrete surface to avoid compromising the structural integrity of the

buildings or damage the embedded rebars or conduit. The Contractor shall obtain Engineer’s approval prior

to proceeding with any core drilling operations.

5. In Section 16745 “Fiber Optic Cable Systems,” delete Article 1.07 in its entirety and replace with the following:

1.07 NOT USED

6. In Section 16745, to the end of Part 2, add the following Article 2.14:

2.14 TEST EQUIPMENT AND TOOLS

A. At the completion of the project, the Contractor shall submit the following to the Engineer:

1. One complete fiber optic connector termination tool kit. The kit shall be the CTS version with VFL, Model TKT-UNICAM-CTS by Corning Cable Systems, or equal.

2. Optical power source and test meter shall be a combination type unit in a single handheld device:

A. Optical source shall provide stable transmission of +0.1dB at 23oC for 8 hours with accurate

wavelengths. Sources shall be 850/1300nm multimode (LED) and 1310/1550nm (single mode)

or combined quad wavelength source. Provide with visual fault locator (VFL).

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July 2010 - 2 - 1643

B. Test meter utilizes InGaAs wide area detector calibrated for 850, 1300, 1550, and 1625nm

wavelengths. Provide fiber identification by audible detection of 2 kHz tone.

C. Provide data storage: Windows-based PC software and cabling for reports, printing, viewing,

and export.

D. Power source/meter shall include jumpers, sleeves, cleaning kit, and transit case and shall be

Corning Cable Systems Express Series Model No. OTS-3MDSD-KIT, or equal.

CHANGES TO DRAWINGS:

7. The following drawings have been revised, as shown on the prints of the attached drawings. These drawings as

revised shall be controlling for the purposes of the required work in lieu of the drawings previously issued. The

changes made on each drawing are indicated in the revision block on each drawing.

Reference

No.

Sheet

No.

Drawing

No.

Revision No.

1. 2 B-133486 -

2. G-1 B-133466 1

3. E-6 B-133472 1

4. E-7 B-133473 1

5. E-9 B-133475 1

6. E-10 B-133476 1

7. E-12 B-133478 1

QUESTIONS AND CLARIFICATIONS:

Requests for clarification of details on the drawings or of provisions of the specifications have been identified. The

questions with the appropriate Metropolitan responses are as follows:

(1) Question: We are certified by the L.A. Unified School District as a Small Business Enterprise (SBE). Is this

SBE Certification acceptable to Metropolitan?

Answer: Yes, the SBE certification issued by the L.A. Unified School District is acceptable to Metropolitan.

(2) Question: On fiber cable Pre-installation Test, (Section 16745, Paragraph 3.04A.2), will the use of a pigtail

and mechanical splice such a Corning Cable Systems, CamSplice Mechanical Splice, be adequate

for the “on the reel testing?”

Answer: Pigtails may be used on the pre-installation test. However, mechanical splices are not allowed to

be used as specified in Section 16745.

(3) Question: A. Is fusion splicing a firm requirement for this job?

B. Would it be possible to use the required pigtails with mechanical splice such a Corning Cable

Systems, CamSplice Mechanical Splice?

Answer: A. Yes, per Section 16745, Paragraph 3.02A.16.a, which reads: “Any allowed splicing of fiber

optic cable shall be by fusion splice only, no mechanical splices are permitted.”

B. No.

(4) Question: On Sheet E-24, the plan shows a 96-strand loose tube Single Mode cable. Due to the short length of

this cable run, can a 48-strand Single Mode and a 48 Multi-Mode be utilized to make this run? The

same type of call out is on Sheet E-10 - See Note 5, which states: “Provide a 48-strand single-mode

and 48-strand multimode fiber optic cable."

Answer: Either a 96-strand loose tube Single Mode cable or a 48-strand Single Mode and a 48 Multi-Mode

may be used on this run. Refer to changes to Sheet E-10 in this addendum.

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July 2010 - 3 - 1643

(5) Question: On Sheet E-24, the buildings (Solids Handling Facility, Ammonia Electrical Equipment Building,

West Filter, East Filter, Vehicle Maintenance Center, MCC 13P1, and Plant Maintenance Facility)

show a new 4-strand Single Mode cable running from an existing Fiber Patch Panel to New PA

Zone Fiber Converter Module in the same building. Will a new fiber patch panel be required to be

installed on each end of the new 4-strand Single Mode Cable?

Answer: Yes. Fiber runs shall always be terminated at each end by a new fiber optic patch panel as

specified.

(6) Question: RE: Section 16745, Article 1.07, “SPARE PARTS AND TEST EQUIPMENT”: Please confirm

that all of the spare parts and test equipment listed in this section are required to be included and

furnished to Metropolitan at completion of the job.

Answer: The Contractor shall provide the test equipment and tools in accordance with the requirements of

Section 16745, Article 2.14. Refer to Changes to Specifications in this addendum.

END OF ADDENDUM