Pozzolan Products Company (P.P.C.) dba Garco Testing Laboratories
Salt Lake City,
Utah
View Accreditation Certificate
George K.
Peterson
6901 S. Wasatch Blvd.
Salt Lake City
,
Utah
84121
Phone: (801) 831-6014
Fax:
george.peterson@gcinc.com
http://www.graniteconstruction.com
Quality Management System - accredited since 8/15/1994
R18, C1077 (Aggregate), D3666 (Aggregate), D3666 (Asphalt Binder), D3666 (Asphalt Mixture), D3740 (Soil)
Asphalt Binder - accredited since 12/15/2000
R28, R29, T44, T48, T49, T51, T201, T202, T228, T240, T301, T313, T315, T316, T350, D5, D70, D92, D113, D2042, D2170, D2171, D2872, D4402, D6084, D6521, D6648, D7175, D7405, D7643
Pavement Preservation - accredited since 4/18/2017
TB-106 / D3910 (Measurement of Slurry Seal Consistency (Cone Consistency))
TB-144 / D6372 (Classification of Micro-Surfacing Materials Compatibility (SBR))
TB-147 / D6372 (Loaded Wheel Test, Vertical and Lateral Displacement of Cold Mixes (LWT))
TB-139 / D3910/D6372 (Set and Cure Development of Slurry Surfacing Systems by Cohesion Tester)
TB-100 / D3910/D6372 (Wet Track Abrasion Of Slurry Surfacing Systems)
TB-109 (Excess Asphalt in Bituminous Mixtures by Loaded Wheel and Sand Adhesion)
TB-113 (Determining Mix Time for Slurry Surfacing Systems)
TB-114 (Wet Stripping of Cured Slurry Surfacing Mixtures)
D3910/D6372 (Determining Set Time for Slurry Seal and Micro-Surfacing Systems (Blot Test))
Asphalt Mixture - accredited since 8/15/1994
R30, R47, R59, R68, R97, T30, T164, T166, T209, T245, T269, T283, T305, T308, T312, T324, T329, T355, D979, D1856, D2041, D2172, D2726, D2950, D3203, D3549, D4867, D5444, D6307, D6390, D6925, D6926, D6927
Soil - accredited since 1/15/1996
R58, T88, T89, T90, T99, T100, T180, T265, T310, D421, D422, D698, D1557, D2216, D4318, D6938
Aggregate - accredited since 9/15/1995
R76, R90, T11, T19, T21, T27, T37, T84, T85, T96, T104, T112, T176, T255, T304, T330, T335, C29, C40, C88, C117, C127, C128, C131, C136, C142, C535, C566, C702, C1252, D75, D546, D2419, D4791, D5821
Please note that our accreditations do not include an expiration date. An accreditation only expires when the laboratory fails to comply with our accreditation requirements.
* This information is only valid as of 10/27/2026. Please visit https://aashtoresource.org for current accreditation status.
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