Specifications.pdf

Standard Specifications for Road and Bridge Construction, 2014 Edition Subsection 705.03.04

705.03.04 Screenings. The screenings shall conform to the following requirements:

Percent Passing by Mass

Sieve Size

12/5 mm (1/2 in.)

9.5mm (3/8 in.)

4.75 mm (No. 4)

2.36 mm (No. 8)

1.18 mm (No. 16) 75 ^m (No. 200)

Project Control Tests Sieve Analysis Sampling Aggregate Fractured Faces

Fractures Min.)

Cleanness Value

Stripping Test

Source Requirements Test

12mm (1/2" Grade 1

90-100 15-35

0-4

0-2

Fest

Percentage of Wear (500 Rev.)

size) 9 Grade 2

50-80

0-15

0-5

0-2

Test Method Nev. T206 Nev. T200

Nev. T230

Nev. T228 Nev. T209

Test Method

AASHTO T96

.5mm (3/8"

20-45

0-6

0-2 size

Requirements Above

90% Min. (2

81%Min.

Satisfactory

Requirements 37% Max.

SECTION 106 - CONTROL OF MATERIAL

106.01 Source of Supply and Quality Requirements. Rock, soil, and other mineral material obtained or produced to construct the project shall be free from detectable levels (< 0.25%) of Naturally Occurring Asbestos (NOA). Such materials are borrow embankment, selected borrow embankment, Rock mulch, decorative boutders, granular backfill, drain rock, base aggregates, shouldering material, aggregates for bltumlnous mixtures, aggregates for Portland cement products, rip rap, rip rap bedding. and any other similar type of rock, soil, or mineral material required to construct the project.

Sample and test materials for NOA as specified herein and provide certified test results.

Provide certified test result prior to source acceptance. Do not deliver materials to the project until the material has been tested and deemed acceptable.

Provide certified documents determining the geological setting/material type from a Geologist to determine initial sampling frequencies.

Sampling frequency shall be performed based on the geologlc settlng/materlal type as follows:

Goologlc SetUngfMateftat Type

Voteanics or Granltte Plirtons (and associated alluvlum)

Undocumented geotoflfc materials (no previous NOA sampling)

Sedlmentary or Metamorphte (e.g. stiale, llmBSlons, and associated atluvlum)

Previously sampled boirow areas or gravel pits with non-detectabte levels of NOA (< 0.25%) sampling Frequency

Three samples of pre-mlned materials by coring or other methods*; one sample every 5,000 cubic yards of procAssed material.

Three samples o( pfe-mlned inaterfals by exiling or other methods'; one sample ever/ 6,000 cubfc yards of processed malerial, One sample evaiy 5,000 cubic yards for the first 15,000 cubic yards; one sample every 18,000 cubic yards thereafter, One sample eveiy 5,000 cubto yards for (he flret 15,000 cubic yards; ona sample evefy 15,000 cubte yards thweaner.

•NOA results from Initial core samples will Indicate the need for additional sampling as mining depth Increases, Obtain composite samples by collecting a minimum of 5 and up to 30 aliquots (subsamples mixed together to make 1 sample). Use a hammer, chlsel, trowel, or other tool to collect ths 5 to 30 aliquots. Place allquots In a labeled, re-closable plastic bag.

If collecting 30-aliquot samples, each aliquot shall weigh approximately 3 ounces for a total sample weight of approximately 5 pounds. For 5-aliquot samples, each aliquot shall weigh approxtmatsly 1 pound. Each sample will represent 5,000 to 15,000 cubic yards based on the aforementioned sampling frequency.

Use a sample grid to collect unbiased composite samples, For core samples, collect sample aliquots from discrete depths throughout the length of core.

Document sampling locations, number of samples, and Imported material types. Document the sample locations with a global positioning system unit. Taks photographs and record notes for each sample.

Ship samples to an asbestos analytical laboratory In secured sample containers, Samples shall be analyzed using EPA Method 600 for Polarized Light Mlcroscopy (PLM) analysis determination of asbestos at a detection limit of 0.25 % asbestos by mass (count a total of 400 points).

Have the laboratory grind all samples for PLM and TEM analyses to 250 micron size.

Based on the PLM results, reanalyze approximately 20% of the samples using the Transmission Electron Mlcroscopy (TEM) method to confirm non-detectable NOA concentrations and provide lower limits of detection for samples with NOA detected, Provide TEM results In Phased Contrast Microscopy equivalents (PCME) concentrations. Report all regulated and non-regulated asbestos fibers and bundles.