Pozzolan Products Company (P.P.C.) dba Utah Pozzolan Products Company dba Garco Testing Laboratories
Coalinga,
California
View Accreditation Certificate
Miguel
Guzman
Coalinga Laboratory
38940 Highway 33
Coalinga
,
California
93210
Phone: (559) 935-2536
Fax:
Miguel.Guzman@gcinc.com
Quality Management System - accredited since 2/12/2018
R18, D3666 (Aggregate), D3666 (Asphalt Mixture), E329 (Aggregate), E329 (Asphalt Mixture)
Asphalt Mixture - accredited since 2/12/2018
R30, R35, R47, R68, R97, T30, T166, T209, T245, T269, T275, T283, T308, T312, T324, T329, D979, D2041, D2726, D3203, D3549, D3665, D4867, D5444, D6307, D6925, D6926, D6927, D6931, D8225
Soil - accredited since 2/12/2018
R58, T89, T90, T99, T100, T180, T265, D421, D698, D1557, D2216, D4318
Aggregate - accredited since 2/12/2018
R76, R90, T11, T19, T21, T27, T37, T84, T85, T96, T100 (Mineral Filler), T104, T112, T113, T176, T210, T255, T304, T335, C29, C40, C88, C117, C123, C127, C128, C131, C136, C142, C535, C566, C702, C1252, D75, D546, D2419, D3744, 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 8/11/2026. Please visit https://aashtoresource.org for current accreditation status.
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