HomeMy WebLinkAboutCT 74-21; CARLSBAD OAKS BUSINESS PARK; ADDITIONAL PAVEMENT RECOMMENDATIONS; 1987-12-09cr 'TEl'E
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'J DIEGO GEOTEG}31'tJCAL CONSULTANTS, INC.
SOIL ENGINEERI4 &tEIGJdF1G GEOLOGY
CITY
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T. & G. Investments
3575 Kenyon Street
San Diego, California 92110
Attention: Mr. Ted Tchang
Job No. 05-7176-001-00-30
Log No. 7-2629
SUBJECT: ADDITIONAL PAVEMENT RECOMMENDATIONS
CT 74-21, Phase 2
Loker Avenue East, Sea Otter Road and
Sea Lion Road rp
Carlsbad Oaks Business Center East
Carlsbad, California
Gentlemen:
As requested by Dan Clark of the City of Carlsbad, we are
providing pavement sections based on an R-value of 6. These
recommended sections should be used in the areas where our
previous testing indicated an R-value of less than 10. The
section is as follows:
4 inches Asphaltic Concrete over
151/2 inches Class II Base
or
4 inches Asphaltic Concrete over
(o inches Class II Base over
12 inches Class II Subbase
We recommend that the upper 8 - 12 inches of pavement subgrade
soils be scarified, moistened to near optimum conditions and
compacted to a minimum 95 percent of ASTM D1557.
Specifications for Class II Base should be taken from CALTRANS
Section 26-1.02B. Subbase specifications should be from CALTRANS
6455 NANCY RIDGE DRIVE • SUITE 200 • SAN DIEGO, CALIFORNIA 92121 • (619) 587-0250
T. & G. Investments Job No. 05-7176-001-00-30
December 9, 1987 Log No. 7-2629
Page 2
Section 25-1.02A. We recommend that you require the contractor
or supplier to assure conformance with specifications. In
addition, we recommend that testing be performed prior to placing
base or subbase materials. It should be noted that testing may
require 5 to 7 days. We recommend that all aggregate base and
subbase be compacted to 95 percent of ASTM D1557.
If you have any questions, please feel free to contact the
undersigned at your convenience.
Very truly yours,
SAN DIEGO GEOTECHNICAL CONSULTANTS, INC.
~Ro?bae'rg~t~M~.PP'in4tnZer Cnt:h;ony F. elfast, P.E. C 40333
Staff Engineer Registration Expires: 3-31-91
Chief Engineer
RMP/AFB/pb I.
Distribution: (1) Addressee
(1) City of Carlsbad C 040333
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