R-7235 Addendum 2.pdf

R-7235 Addendum 2

July 15, 2024

ADDENDUM NO. 2

PLANS AND SPECIFICATIONS NO. R-7235

MARINE MAINTENANCE YARD DOCK REPLACEMENT

IN THE CITY OF LONG BEACH, CALIFORNIA

NOTICE TO HOLDERS OF PLANS AND SPECIFICATIONS

Please note the following changes, clarifications, and additions:

1. SPECIFICATIONS:

Division C, C-1 Bid Form (Revised): Change includes updating bid open date to July 22, 2024 and adding Item No. 7 “Steel Repair” to Base Bid.

2. REQUEST FOR INFORMATION:

Question 2: There is no repair called out in the plans for the steel pipe pile at the North end of the dock. At the job walk it was observed that this pile is in pretty bad shape. Please confirm that the contractor is only to protect the pile in place with no refurbishment. Also please confirm that the contractor can assume that the pile is sufficient to secure the dock for dock design purposes.

Answer: Contractor to provide a lump sum bid for additional line item, Bid Item 7 – Steel Pile Repair. Contractor to prepare surface and repair the northern steel pile located under the bridge. Prepare surface and repair with SeaShield 525 Epoxy Coating (or approved equal) per manufacturer’s instructions as shown on the attached technical data sheet. Additional information can be found at SeaShield 525™ Epoxy - Wet & Dry Surface Epoxy Coating - Denso (densona.com). Lump sum bid to include preparation and repair of the top 20 feet of the pile. Including all work ancillary to this completing this work. Work to be completed at low tide for the upper portion not accessible by a diver. All diving work to be completed by certified divers. Pile repair work to be completed after the existing dock has been removed and before the new dock has been installed.

Surface preparation by high-pressure water blasting is acceptable and shall be done at a minimum of 3,500 psi (24 MPa). Scraping and other manual means of surface preparation should be avoided since they tend to polish the surface.

Contractor must install a turbidity curtain prior for use during the steel pile surface preparation.

Department of Public Works 411 West Ocean Boulevard, 5th Floor Long Beach, CA 90802

(562) 570-6383

R-7235 Addendum 2

Department of Public Works 411 West Ocean Boulevard, 5th Floor Long Beach, CA 90802

(562) 570-6383

3. GENERAL REQUIREMENT:

All contractors and subcontractors need to be registered on the Department of Industrial Relations (DIR’s) new website: https://services.dir.ca.gov/gsp

CONTACT: Before the Bid opening, prospective Bidders shall direct any communications regarding this Work to:

City of Long Beach, Department of Public Works Project Management Bureau 5th Floor, City Hall 411 W. Ocean Boulevard Long Beach, CA 90802 Attention: Marvin Mai / Anne Takii

E-mail: marvin.mai@psomas.com / anne.takii@longbeach.gov

Communications may be written or oral, but the City is not bound by any oral interpretation of the Contract Documents made by any City employee, nor does the City guarantee the accurate transcription of oral questions.

PREPARED BY: Marvin Mai

ACKNOWLEDGED BY:

Company Name

Print Name Title

Signature Date

Department of Public Works C-1 (Revised) R-7235 City of Long Beach Division C – Bid Documents

BIDDER'S NAME: ______________________

BID TO THE CITY OF LONG BEACH

MARINE MAINTENANCE YARD DOCK REPLACEMENT (REVISED)

In accordance with the Notice Inviting Bids for this Work in the City of Long Beach, California, to be opened on July 22, 2024 at 2:00 p.m. we offer to furnish all necessary labor, tools, materials, appliances and equipment for and perform all Work mentioned in the Notice Inviting Bids, in full compliance with Plans & Specifications No. R-7235 at the prices listed below.

We certify that we have examined the site and that the Bid is complete. By signing the Bid, we certify that the Contractor will not submit a claim based on failure to examine the site thoroughly.

The base bid total shall be used for determining the lowest bidder.

BASE BID

ITEM

NO.

ITEM DESCRIPTION

ESTIMATED

QUANTITY

UNIT

UNIT PRICE

(IN FIGURES)

ITEM TOTAL

(IN FIGURES)

1 Mobilization/Demobilization 1 LS 2 Demolition/Disposal 1 LS 3 Concrete Dock (S) 1 LS 4 Aluminum Gangway 1 LS

5 Concrete Abutment 1 EA

6 ¾” Waterline and Utility Rack 1 LS

7 Steel Pile Repair 1 LS *(S) denotes “Specialty Items” as defined in 2-3.2 Self Performance of Division H – General Requirements

BASE BID TOTAL _______________________________________________

We understand that these quantities are estimates only and are given solely for the purpose of facilitating the comparison of Bids, and that the Contractor’s compensation will be computed on the basis of the actual quantities in the completed Work.

DO NOT SUBMIT THIS FORM AS YOUR BID. BIDS ARE TO BE SUBMITTED

ELECTRONICALLY AS DESCRIBED IN DIVISION B.

(Continued on Next Page)

T E C H N I C A L D A T A S H E E T

Description

Uses

Features

Surface Prep

SeaShield 525 Epoxy is a 100% solids two part, moisture tolerant, non-sag, high build epoxy designed for dry, damp and wet surfaces. It can be used for steel, concrete and wood structures.

Can be used on dry, damp or wet surfaces for steel, concrete or wood to provide corrosion protection and sealing. Applications would include pilings, bridges, sheet piles, pipelines and other surfaces subject to corrosion in fresh or salt water environments. It can also be used in a variety of commercial and industrial applications including cooling towers, water / wastewater clarifi ers, digestors, lift stations, walls and manholes.

• Can be applied to wet, damp or dry surfaces

• Can be used for vertical and horizontal applications

• Excellent adhesion to wet surfaces

• Easily applied by brush, gloved hand, Denso Applicator Pad or roller

• Long pot life

• High build

• Safe and environmentally friendly

• Excellent abrasion and impact resistance

• No VOC’s, 100% solids

Surface preparation is very important and will improve the adhesion and extend the life of the coating. Surface preparation should include the following:

Surface must be at least 40°F (4°C) prior to application.

Surface must be sound and free of loose rust, marine growth, and any old existing coatings.

Remove all oils, greases, dirt and wax solutions from surface.

Steel Surfaces: The recommended method is to prepare the surface by abrasive blasting per SSPC-SP6/NACE 3 Commercial Blast. However, high-pressure water blasting is acceptable and shall be done at a minimum of 3,500 psi (24 MPa). Scraping and other manual means of surface preparation should be avoided since they tend to polish the surface.

Concrete: Concrete should be a minimum of 28 days old and fully cured prior to application.

Prepare the surface by abrasive blasting per SSPC-SP13/NACE 6, ICRI Guideline 310.2R

CSP3.5.

Wood: Prepare surfaces by high-pressure water blasting and shall be done at a minimum of 3,500 psi (24 MPa).

SEASHIELD 525™

EPOXY

Epoxy Coating for Dry and Wet Surfaces

Storage

HSE

Cleaning

For best mixing & application, components shall be at a min. 70°F (21°C) prior to use. Initially stir Part A (base) & Part B (hardener). Add the hardener to the base and mix at a slow speed until a constant color is achieved making sure all sides of the container are scraped.

SeaShield 525 Epoxy can be applied by Denso Brush, Denso Applicator Pad, gloved hand or roller. If surface is damp or wet displace water as the coating is applied.

Denso Brush: Place material on brush and spread out evenly over the surface.

Denso Applicator Pad: Place material on applicator pad with stir stick then spread out evenly with applicator pad.

Gloved Hand: Make sure glove is tight fi tting made of rubber and / or plastic and is chemical resistant. Gloves should be wet to prevent adhesion to gloves and press SeaShield 525 onto surface and work into place to require thickness. Use water as a lubricant to smooth out material.

Roller: Use a low nap roller and place material on surface and proceed rolling out material until an even mil thickness is achieved.

Minimum 24 months when stored in original containers between 41°F (5°C) to 100°F (38°C). On job site where temperatures are below 60°F (16°C) product should be kept warm to mix properly.

Clean tools and equipment with MEK or equivalent solvent cleaner.

Wear protective clothing and ensure adequate ventilation. Avoid contact with skin and eyes. See Safety data sheet for further information.

1 liter kits and 1 gallon kits standard. Other unit sizes are available upon request.

Mixing

Application

Packaging

Tech Data Properties Imperial Metric Solids Content 100% 100% Base Component (Unmixed) @ 77°F (25°C)

Viscosity 192,000 cps 192,000 cps Color Gray Gray

Hardener Component (Unmixed) @ 77°F (25°C)

Viscosity 17,200 cps 17,200 cps Color Black Black

Mixed Material @ 77°F (25°C) Viscosity 62,000 cps 62,000 cps Color Dark Gray Dark Gray

Mixing Ratio (A/B) by Weight 1.75 Parts Base:

1 Part Hardener

1.75 Parts Base:

1 Part Hardener

Cure Times Pot Life @ 77°F (25°C) 1 hour 1 hour Pot Life @ 97°F (36°C) 23 minutes 23 minutes Dry Time @ 50°F (10°C) 24 hours 24 hours Dry Time @ 77°F (25°C) 7 hours 7 hours Dry Time @ 117°F (47°C) 3 hours 3 hours

Cathodic Disbondment 28 days at 77°F (25°C)@ -1.5V (ASTM G 95-97 – 1988 Modifi ed)

Dry Substrate 8.8 mm 8.8 mm Damp Substrate 7.8 mm 7.8 mm Wet Substrate 6.7 mm 6.7 mm

Impact Resistance – 2.54 lb. tup 81.8 inch lbs. 9.25 joules Theoretical Coverage 14 ft2/30 mils/liter 1.301 m2/ 762 microns / liter Thickness Minimum/Maximum 30 mils to 1/4 inch 762 to 6350 microns Taber Abrasion (1000 cycles, CS-17 wheel, 1 kg load) 11.3 mg 11.3 mg

Shore D Hardness @ 77°F (25°C) 75 + 75 + Gouge Resistance 50 kg Weight 22 mils gouge 559 microns gouge Pull-Off Adhesion (RT)

Dry substrate 2587 psi 2587 psi Damp substrate 2455 psi 2455 psi Wet substrate 2621 psi 2621 psi

Application Temperature 40°F to 125°F 5°C to 52°C Service Temperature -40°F to 150°F -40°C to 65°C

The information given on this sheet is intended as a general guide only and should not be used for specifi cation purposes. We believe the information to be accurate and reliable but do not guarantee it. We assume no responsibility for the use of this information. Users must, by their own tests, determine the suitability of the products and information supplied by us for their own particular purposes. No patent liability can be assumed.

HOUSTON:

9710 Telge Road, Houston, Texas, U.S.A. 77095

Tel: 281-821-3355 Fax: 281-821-0304

A Member of Winn & Coales International www.densona.com info@densona.com

TORONTO:

90 Ironside Crescent, Unit 12, Toronto, Ontario, Canada M1X1M3

Tel: 416-291-3435 Fax: 416-291-0898DENSO, INC.

VER 2306.09