1_-_SOW_-_Wawona_Road_Striping.pdf

Statement of Work:

Apply waterborne traffic paint to 32 miles of Wawona Road ( Highway 41) in Yosemite National Park.

Work will be performed during periods of low traffic. Temperature will be a determining factor. Every effort shall be taken to eliminate tracking using cones, crash cushion truck or pilot vehicle. Tracking will be corrected to the satisfaction of the COR. Striping hours shall be from 8:00 PM to 6:00 AM. Work will not be performed on weekends or holidays unless approved by Park Management. All striping work shall be executed in accordance with the following specifications and terms and conditions of the contract.

SPECIFICATIONS

Construction Requirements Where existing and final pavement marking locations are identical, stake the limits of existing pavement markings before beginning pavement work.

Submit manufacturer’s MSDS and product data sheets at least 7 days before applying pavement markings.

A field demonstration may be required to verify the adequacy of the material.

Ship marking material in suitable containers plainly marked with the following information as appropriate for the material being furnished:

(a) Manufacturer’s name and address;

(b) Name of product;

(c) Lot and batch numbers;

(d) Color;

(e) Net mass and volume of contents;

(f) Date of manufacture;

(g) Date of expiration;

(h) Statement of contents (if mixing of components is required);

(i) Mixing proportions and instructions; and

(j) Safety information.

Yosemite National Park

SOW-Striping 8822-23-0001 Jessica Crow Phone: 209-347-7323 1/23/2023

National Park Service U.S. Department of the Interior

Establish marking patterns or locations according to the MUTCD, plans, or state requirements. In curve widening areas, establish the edge line markings at the limits of the traveled way and the centerline markings equal distance between the edge lines.

Remove loose particles, dirt, tar, grease, and other deleterious material from the surface to be marked.

Where markings are placed on rigid pavement less than 1-year old, clean the pavement of laitance and curing compounds.

Remove temporary pavement markings the same day permanent pavement markings are applied. Remove temporary and conflicting pavement makings according to Subsection 635.13 before applying permanent pavement markings.

Obtain approval before applying markings. Apply markings to a clean, dry surface, and according to the manufacturer’s recommendations. Produce markings that are clean-cut and uniform in appearance by day and night.

Current state approved pavement marking material may be used, when approved by the CO. Submit proof of compliance with state specifications.

Protect markings from traffic until dried to a no-tracking condition. Remove tracking marks, spilled marking material, markings in unauthorized areas, and defective markings.

Apply paint when pavement and air temperatures are 50 °F (10 °C) and rising.

Do not heat the paint above 120 °F (49 °C). Spray paint at a 15 mil (0.38 millimeters) minimum wet film thickness or at a rate of 107 square feet per gallon (2.6 square meters per liter).

On new asphalt pavements or new asphalt surface treatments, apply two coats.

WATERBORNE TRAFFIC PAINT (TYPE B AND C)

Apply paint when pavement and air temperatures are 50 °F (10 °C) and rising.

(a) Type B. Do not heat the paint above 120°F (49°C). Apply paint at a rate of 100 square feet per gallon (2.5 square meters per liter).

Apply Type 1 glass beads on the paint at a rate of 6 pounds per gallon (0.72 kilograms per liter) of paint.

Apply two applications of paint and glass beads. Apply the second coat in the opposite direction of the first application. Apply the second application after the first is tack free.

(b) Type C. Do not heat the paint above 120°F (49°C). Apply paint at a rate of 70 square feet per gallon (1.7 square meters per liter).

Apply glass beads using two dispensers. Apply Type 3 glass beads on the paint at a rate of 8 pounds per gallon (0.96 kilograms per liter) immediately followed by Type 1 glass beads at a rate of 6 pounds per gallon (0.72 kilograms per liter).

MEASUREMENT

When pavement markings are measured by the linear foot (meter), measure the length of line applied along the centerline of each line applied regardless of color. Measure broken or dotted pavement lines from end to end of the line including gaps. Measure solid pavement lines from end to end of each continuous line.

Measure line quantities based on a 4-inch (100-millimeter) wide line. For line widths greater than 4 inches (100 millimeters), adjust the measured length of line in the ratio of the required width to 4 inches (100 millimeters).

When pavement markings are measured by the square foot (square meter), measure the number of square feet (square meter) of line, symbol or letter marking based on the marking area shown in the plans. If not shown, measure the area of each marking in place to the nearest square foot (square meter).

WATERBORNE TRAFFIC PAINT SPECIFICATIONS

Furnish an acrylic water-based, ready-mixed paint conforming to the following:

(a) Composition. Furnish a paint composed of resin solids of 100 percent acrylic polymer with the exact formulation determined by the manufacturer. Conform to the following:

(1) Pigment, ASTM D3723 45 to 55 percent by mass

(2) Lead, chromium, cadmium, or cobalt 0 percent by mass

ASTM D3335 & ASTM D3718

(3) Volatile organic compounds, EPA Method 24 20.0 oz/gallon (150 g/L) max.

(4) Density of paint, ASTM D1475 12.0 lb/gallon (1.44 kg/L) min.

(b) Viscosity. ASTM D562 75-90 Krebs units

(c) Drying time.

(1) Dry to no pickup, ASTM D711 10 minutes max.

(2) Drying to no track, ASTM D713 90 seconds max.

(d) Flexibility. ASTM D522, using the ¼-in No cracking or flaking (6.4-mm) cylindrical mandrel

(e) Dry opacity. ASTM D2805, contrast ratio at 0.96 min.

319 ft2/gallon (7.85 m2/L) spreading rate

(f) Color.

(1) White, ASTM D1729 Match FHWA standard highway white

(2) Yellow, ASTM D1729 Match FHWA standard highway yellow

(g) Daylight reflectance. (Without glass beads)

(1) White, ASTM E1347 84 percent relative to magnesium oxide standard

(2) Yellow, ASTM E1347 55 percent relative to magnesium oxide standard

(h) Bleeding ratio. ASTM D868. Determine 0.96 min.

reflectance according to ASTM D1347 immediately after drying. Divide the average of three reflectance readings of the paint over the bleeding surface by the average of three readings over the non-bleeding surface to determine the bleeding ratio

(i) Freeze-thaw stability. ASTM D2243 ±5 Krebs units max.

(j) Storage stability. During a 12-month storage period, conform to the following:

(1) No excessive setting, caking, or increase in viscosity; and

(2) Readily stirred to a consistency for use in the striping equipment.

Note-Travel restrictions on Route 140. All vehicles are restricted to 45 feet total length on route 140 into the Park. Updated road conditions are available at the California Department of Transportation website. Permits for longer vehicles have to be approved on a case by case basis by Cal-Trans.

Statement of Work: