Villas at LV-CS051018ALPHA TESTINg, INC.
2209 Wlscor'~ln 5't., Sulte 100
~ Texas 75229
97~/620-8911 - 972/263-4937 (Metro)
lAX: ~72/406-8023
October 18, 2005
HAWKINS - WELWOOD HOMES, L.P.
C/O DOWDEY, ANDERSON & ASSOCIATES
5225 Village Creek Drive, Suite 200
Piano, Texas 75093
Attention: Mr. Rodney Louviere
Re:
Summary of Field Density Tests
VILLAS AT LAKE VISTA PHASE ONE
Coppall, Texas
ALPHA Report No. 04773-101
Submitled herewith is a summary letter regarding results of in-place field density tests conducted on both
natural subgrade end recent fill soils placed at the project referenced above between March and April
2005. This information is provided to comply with recommendations in the Geotechnical Exploration
report for the p~oj~ct (ALPHA Report No. G04773-1 dated November 18, 2004), 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 "Grading Plan" Plate 16A of 19 dated April 18, 2005 for Villas at Lake Vista Phase One
as prepared by Dowdey, Anderson & Associates, Inc. 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 predominate 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 oftbe 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. G04773-1 dated November 18,
2004) end our interpretation of the intent of FHA Data Sheet 79g. Results of our review of tbese 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 and those in FHA Data Sheet
79g.
Geotechnical Engineering · Construction Materials Testing · Environmental Engineering · Consulting
ALPHA Report No. 04733-101
The recommended depth of moisture conditioning for pads in Zone !II as identified in the Geotechnical
Exploration report (ALPHA Report No. G04773-1 dated November 18, 2004) was completed during
earthwork operations. Plastic sheeting was then placed above the moisture conditioned soils to maintain
the moisture contents. Based on the completed subgrade improvements slab-on-grade foundations in
Zone !II may be designed considering potential soil movements of 3 inches.
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.
Sincerely yours,
ALPHA TESTING, INC.
Geotechmcaf Enqineennq · Construction Materials Testing · Environmental Engineering · Consulting