Alexander Ct-CS080714 (2)
AlPHA ~TESTIIIG
2209 Wisconsin Street, Suite 100
Dallas, Texas 75229
Geotechnical I Construction Materials I Environmental
www.alphatesting.com
July 14, 2008
Mira Mar Development Corporation
6003 Sunderland Drive
Colleyville, Texas 76034
Attention: John Hawkins
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Re: Summary of Field Density Tests
Alexander Court
Coppell, Texas
ALPHA Report No. 070021-54
Submitted herewith is a summary letter regarding results of in-place field density tests conducted on both
natural subgrade and recent fill soils placed at the project referenced above between September 2007 and
July 2008. This information is provided to comply with recommendations in the Geotechnical Exploration
report for the project (ALPHA Report No. G070021 dated February 15, 2007), Housing and Urban
Development specifications, and our interpretation of the intent of FHA Data Sheet 79g. It should be
noted that any retaining wall backfill that would encroach on building pads or other new fill placed within
building pads should have additional field density testing.
In-place field density tests have been conducted routinely at selected locations on both natural subgrade
soils and fill soils placed during earthwork operations within the proposed building pad area for lots
indicated on the "Lot Grading Plan" Sheet 9 of 10 dated August 15, 2007 for Alexander Court as prepared
by Tim Bennett Engineering. Each field density test was conducted using a nuclear density device in
accordance with applicable ASTM specifications. Standard Proctor compaction tests have been
conducted on the predominant soil types observed on the site for correlation with the in-place density test.
Results of field density tests were submitted to the Client shortly upon completion of the testing.
Field density tests results have been compared with specifications for soil compaction outlined in the
Geotechnical Exploration report for the project (ALPHA Report No. G070021 dated February 15, 2007)
and our interpretation of the intent of FHA Data Sheet 79g. Review of these density tests indicate the fill
at the specific test locations is compacted in accordance with the applicable recommendations in the
Geotechnical Exploration report for the project (i.e. a minimum of 95% ASTM standard Proctor dry
density) and those in FHA Data Sheet 79g. This letter is no way a guarantee or warranty of the work
product of the grading contractor.
It was a pleasure to be of service on this project. If we can be of further assistance, do not hesitate to
contact our office.
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Sincerely yours,
ALPHA TESTING, INC.
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Project Manager