HomeMy WebLinkAboutCT 00-06; BRESSI RANCH; RESULTS OF LABORATORY TESTS ON PROPOSED IMPORT CLASS 2 AGGREGATE BASE SAMPLE; 2004-04-21croo-o
Leighton and Associates, Inc.
A LEIGHTON GROUP COMPANY
April 21, 2004
Project No. 971009-017
To: Lennar Communities
1525 Faraday Avenue, Suite 300
Carlsbad, California 92008
Attention: Ms. Kristine Zortman
Subject: Results of Laboratory Tests on Proposed Import Class 2 Aggregate Base Sample
from the Camp Pendleton 3-mile Pit for the Bressi Ranch Project, Carlsbad,
California
References: Caltrans, 1992, Standard Specifications, July 1992
Carlsbad, City of, 1996, Standards for Design and Construction of Public Works
Improvements in the City of Carlsbad, California, Project No. 05332-12-01, dated
April 20, 1993, revised December 10, 1996
In accordance with the requirements of the City of Carlsbad, we have performed laboratory tests on
a sample of the proposed import Class 2 Aggregate Base (AB) material from the Camp Pendleton
3-mile pit to be used on the backbone streets of the Bressi Ranch Project located in Carlsbad,
California. One representative sample of the Class 2 AB being produced at the Camp Pendleton 3-
mile pit was obtained and transported to our laboratory. Laboratory tests performed on the
representative sample included sand equivalent (in accordance with ASTM Test Method D2419)
and sieve analysis (in accordance with ASTM Test Method C136). The results of the laboratory
tests are presented on Table 1.
Based on the City of Carlsbad requirements and the Caltrans specifications (Section 26-1.02A) as
indicated on Table 1, the representative Class 2 aggregate base sample met the city requirements.
3934 Murphy Canyon Road, Suite B205 • San Diego, CA 92123-4425
858.292.8030 • Fax 858.292.0771 • www.leightongeo.com
Table 1
Laboratory Test Results
Sieve Analysis (in accordance with ASTM Test Method C136)
Operating Range
Sieve Size Required Percentage Sample Result In Conformance?
Passing*
1 inch 100 100 Yes
3/4 inch 90-100 97 Yes
No. 4 35-60 57 Yes
No. 30 10-30 28 Yes
No. 200 1 2-9 7 Yes
Sand Equivalent (in accordance with ASTM Test Method D2419)
Required Minimum* Sample Result In Conformance?
25 48 Yes
*per Caltrans Standard Specifications Section 26 and City of Carlsbad Standard Special
Provisions for Construction.
If you have any questions regarding our letter, please contact this office. We appreciate this
opportunity to be of service.
Respectfully submitted,
LEIGHTON AND ASSOCIATES, INC.
Randall K. Wagner, ~EGI612
Senior Associate
Distribution: (2) Addressee
Lennar Communities, Attention: Mr. Jim Urbina
City of Carlsbad, Public Works Department, Attention: Mr. Casey Arndt
(1) J. T. Kruer, Attention: Mr. Chuck Knight
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Leighton