1. SJVRWRF Dewatering Building Corrosion Remediation
Marc Serna, P.E.
September 28, 2017

2. SJVRWRF Dewatering Building Corrosion Remediation
Dewatering Building Roof Plan
Building was built in It is made of block wall with roof metal deck at 22-ft above floor with work area of 4,200-sq.ft
Contractor scope-of-work is to re-coat existing roof structural supports and metal decking.
Existing coating contains lead.
Contractor to protect and allow operation of dewatering equipment during construction.
LIMIT OF WORK
EXTENT OF PLATFORM / DECKING INSTALLED BY CONTRACTOR
EXTENT OF SURFACE PREPARED BY CONTRACTOR

3. Metal Decking and Structural Support Condition
SIGNS OF CORROSION ON STRUCTURAL SUPPORT BEFORE PARTICLE BLASTING
SIGNS OF CORROSION METAL DECKING BEFORE PARTICLE BLASTING

4. Metal Decking After Particle Blasting
TEST AREA: METAL DECKING AFTER PARTICLE BLASTING

5. After Inspection of Applied Epoxy Primer
TEST AREA: AFTER SCRAPING OF LIFTED MATERIALS (PUTTY KNIFE TEST FOR ADHESION)

6. Metal Decking after 1st Layer Epoxy Primer Application
TEST AREA: METAL DECKING AFTER 1ST LAYER EPOXY PRIMER COATING AFTER REMOVING ACRYLIC COATING

7. Beams after 1st Layer Primer Application
STRUCTURAL SUPPORT AFTER PARTICLE BLASTING AND 1ST LAYER EPOXY PRIMER APPLICATION

8. Recommendations
Staff recommends 100% removal of acrylic including old primer with lead.
Approve and authorize amendment to agreement with Schuler Constructors for an amount of $83,800.
Additional appropriation of $125,600 to fund the balance of the change order and expenses through the construction phase of the project for a total project cost of $398,300.

9. Contact Information
Marc Serna, P.E.
Director of Engineering
(951) x 4461