C E N T E R L A B O R AT O RY VA L I D AT I O N U S A C E ... · 3/16/2020 Validation Certificate 1/2 U S A C E C E RT I F I C AT E O F L A B O R AT O RY VA L I D AT I O N

3/16/2020 Validation Certificate

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USACE CERTIFICATEOF

LABORATORY VALIDATION

RJ Lee Group350 Hochberg Road

Monroeville, PA, George Lincoln(724) 387-1988

has demonstrated, by abbreviated audit of its AASHTO accreditation, or by inspection of required records, equipment, procedures,facilities, and/or final reports, its proficiency to perform testing of construction materials, as established by the quality standards

of AASHTO R 18 guidance and the requirements of the applicable ASTM standards.

THIS USACE CERTIFICATE OF LABORATORY VALIDATION IS ACCURATE AS OF ITS DATE AND TIME OFGENERATION:

16 MAR 2020 AT 10:05 HOURS

ALL METHODS LISTED ON THIS CERTIFICATE OF VALIDATION WILL EXPIRE ON 03/09/2022

PLEASE CONFIRM THE CURRENT VALIDATION STATUS OF THIS LABORATORY USING THE SEARCH FEATURE ONOUR PUBLIC WEBSITE: https://mtc.erdc.dren.mil

Chad A. Gartrell, PE, Director

USACE Materials Testing Center Vicksburg, Mississippi, USA

MTCMATERIALS TESTING

CENTER

3/16/2020 Validation Certificate

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AGGREGATE

Aggregate - C 117 - Req - Material Finer than 75 μm (No. 200) SieveAggregate - C 136 - Req - Sieve Analysis of AggregatesAggregate - C 702 - Opt - Reducing Samples to Testing Size

CONCRETE

Concrete - C 457 - Opt - Air-Void System by Microscopic DeterminationConcrete - C 856 - Opt - Petrographic Examination of Hardened ConcreteConcrete - C 1152 - Opt - Acid-Soluble Chloride in ConcreteConcrete - C 1202 - Opt - Electrical Indication of Concrete to Resist Chloride IonConcrete - C 1218 - Opt - Water-Soluble Chloride in Concrete