Registers refreshed 2026-11-08.See refresh dates
United States

Tolunay Engineering Group

19407 Park Row Dr., Suite 100, 77084, Houston, TX, United States

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A2LA 4857.01A2LA 4857.02ISO/IEC 17025Register refreshed 2026-11-06

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Accredited standards
52
A2LA certificates
2
Site in our directory
1
A2LA accredited scope

What this lab is accredited for

Our reading of the A2LA scope: each standard once, with its official name where we have checked it.

Only this lab. Searches the 52 standard numbers and the 0 official names we hold. When no standard matches, it searches the method text of every scope line.

ASTM52
ASTM C29
ASTM C31
ASTM C39
ASTM C109
ASTM C117
ASTM C127
ASTM C128
ASTM C136
ASTM C138
ASTM C143
ASTM C172
ASTM C173
Show all 52
ASTM C192
ASTM C231
ASTM C566
ASTM C617
ASTM C702
ASTM C1064
ASTM C1231
ASTM C10191
ASTM D75
ASTM D421
ASTM D422
ASTM D558
ASTM D698
ASTM D854
ASTM D1140
ASTM D1557
ASTM D1633
ASTM D1883
ASTM D2166
ASTM D2216
ASTM D2435
ASTM D2487
ASTM D2850
ASTM D3740
ASTM D4221
ASTM D4318
ASTM D4546
ASTM D4643
ASTM D4647
ASTM D4718
ASTM D4972
ASTM D5084
ASTM D6572
ASTM D6913
ASTM D7263
ASTM D7928
ASTM D24881
ASTM D69381
ASTM E329
ASTM G187

Read from the A2LA scope documents we downloaded on 2026-10-27. Register refreshed 2026-11-06.

Scope as published by A2LA

6 lines
A2LA

ISO/IEC 17025

Active

4857.01

The scope document we hold says it is valid until 2028-03-31.

View scope

Accredited scope, certificate 4857.01

LineMethodMatrixRange
1ASTM: C1077; ASTM D3740; ASTM E329; ASTM C29/C29M; ASTM C566; ASTM C117; ASTM C127; ASTM C128; ASTM C136/C136M; ASTM C702/C702M; ASTM D75/D75M1; ASTM C31/C31M1; ASTM C39/C39M; ASTM C138/C138M1; ASTM C143/C143M1; ASTM C172/C172M1; ASTM C173/C173M1Aggregates; Concrete-
2ASTM C192/C192M; ASTM C231/C231M1; ASTM C617; ASTM C1064/C1064M1; ASTM C1231/C1231M; ASTM C109/C109M; ASTM C10191; ASTM D698; ASTM D1557; ASTM D2166/D2166M; ASTM D4318; ASTM D1883; ASTM D4718/D4718M; ASTM D69381Concrete; Masonry; Soils-
3ISO/IEC 17025:2017--

Ranges are reproduced from the accredited scope document as published, and only where we found that range printed in the document for the line. Otherwise the cell reads “See scope document”. An absent range means the register did not state one. Line numbers are ours, for cross-reference; they follow the order of the scope document.

A2LA

ISO/IEC 17025

Active

4857.02

The scope document we hold says it is valid until 2028-03-31.

View scope

Accredited scope, certificate 4857.02

LineMethodMatrixRange
1ASTM D421; ASTM D422; ASTM D558/D558M; ASTM D698; ASTM D854; ASTM D1140; ASTM D1557; ASTM D1633; ASTM D1883; ASTM D2166/D2166M; ASTM D2216; ASTM D2435/D2435M; ASTM D2487; ASTM D24881; ASTM D2850; ASTM D4221; ASTM D4318; ASTM D4546; ASTM D4643; ASTM D4647; ASTM D4972; ASTM D5084Soil; Soil-Cement Mixtures; Rock-
2ASTM D6572; ASTM D6913/D6913M; ASTM D7263 (Method B); ASTM D7928; ASTM G187soils; clayey soils-
3ISO/IEC 17025:2017--

Ranges are reproduced from the accredited scope document as published, and only where we found that range printed in the document for the line. Otherwise the cell reads “See scope document”. An absent range means the register did not state one. Line numbers are ours, for cross-reference; they follow the order of the scope document.

Location

19407 Park Row Dr., Suite 100, Houston, TX, 77084, US

29.75894, -95.36770

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Accreditation data refreshed from the A2LA register on .

This page mirrors a public register. For a purchasing, audit or regulatory decision, confirm against the A2LA entry linked above.