HomeMy WebLinkAboutCT 00-20; FOX MILLER PROPERTY; FINAL REPORT OF TESTING AND OBSERVATION SERVICES PERFORMED DURING SITE IMPROVEMENTS; 2010-09-23FINAL REPORT OF
TESTING AND OBSERVATION
SERVICES DURING CONSTRUCTION
OF SITE IMPROVMENTS
FOX MILLER
OFFSITE IMPROVEMENTS
CARLSBAD, CALIFORNIA
PREPARED FOR
H. G. FENTON COMPANY
- SAN DIEGO, CALIFORNIA
SEPTEMBER 23, 2010
PROJECT NO. 07238-42-038
GEOCON
INCORPORATED
GEOTECHNICAL • ENVIRONMENTAL. M A I E R I A I S
()
Project No. 07238-42-03B
September 23, 2010
H. G. Fenton Company
7577 Mission Valley Road, Suite 200
San Diego, California 92108
Attention: Mr. Allen Jones
Subject: FOX MILLER OFFSITE IMPROVEMENTS
CARLSBAD, CALIFORNIA
FINAL REPORT OF TESTING AND OBSERVATION SERVICES
DURING CONSTRUCTION OF SITE IMPROVEMENTS
Dear Mr. Jones:
In accordance with your request, we have provided compaction testing and observation services on an
"on-call" basis during construction of improvements along College Avenue and El Camino Real for
the subject project. The scope of our services consisted of performing in-place density tests on
subgrade soil for sidewalk and curb and gutter, pavement sübgrade, and during the placement of
aggregate base materials and asphalt concrete.
The project plans used during construction of site improvements are titled Offsite Improvement
Plans for: Fox Miller, Left Turn Pockets .@ El Camino Real/College & College/Salk, Traffic
Signal ® College! Salk, Carlsbad, California, prepared by Hunsaker & Associates, city approval
date October 27, 2008 (W.O. No. 2576-02, Drawing No. 456-4, Project No. MS 04-20).
We performed in-place density tests using a nuclear density gauge in accordance with ASTM Test
Procedure D 6938 for soil and D 2950 for asphalt concrete. We performed laboratory tests on soil and
aggregate base samples in accordance with ASTM D 1557, Maximum Dry Density and Optimum
Moisture Content. We performed laboratory tests on asphalt concrete samples in accordance with
ASTM D 2726, Hveem Density; D 2041, Theoretical Maximum Density; D 1560, Stability; D 6307,
Asphalt Content; and C 136, Sieve Analysis. The results of the field tests are summarized in Table I.
The results of the laboratory tests are summarized in Tables II through V.
Results of the in-place density tests indicate that subgrade soil for roadway median areas possess a
dry density of at least 90 percent of the laboratory maximum dry density near to slightly above
6960 Flanders Drive M San Diego, California 92121-2974 m Telephone 858.558.6900 M Fox 858.558.6159
optimum moisture content at the locations tested. In-place density tests indicate curb and gutter and
asphalt concrete subgrade was compacted to at least 95 percent relative compaction with the
exception of areas were soft saturated soil was encountered at subgrade elevation. In these areas the
upper approximately 18 inches of subgrade soil was removed and replaced with aggregate base. Prior
to placing base, Mirafi 600X geotextile fabric was placed on the subgrade. The areas where soft
subgrade soils were encountered and geotextile fabric was placed generally consisted of the curb and
gutter subgrade on College Avenue between Stations 86+00 to 92+00, and in the pavement areas on
El Camino Real between approximate Stations 14+85 to 15+20, 14+10 to 14+60, and 16+10 to
16+30. Aggregate base was compacted to a dry density of at least 95 percent relative compaction at
the locations tested.
With respect to the asphalt concrete, the base layer was compacted to a dry density of at least 95
percent relative compaction and generally conformed to Standard Specifications for Public Works
Construction (Greenbook) with respect to stability, gradation, and oil content (see Tables III and IV).
Compaction and stability tests performed on samples of the rubberized asphalt cap indicate the
material did not achieve 95 percent relative compaction or meet Greenbook specifications for
stability (see Table III, sample AC-3). Additionally, laboratory testing indicates the gradation on the
rubberized asphalt is out of specifications on the No. 4, 8 and 30 screens (see Table V).
Should you have any questions regarding this report, or if we may be of further service, please
contact the undersigned at your convenience.
Very truly yours,
GEOCON INCORPORATED
o.Mesell' C.
GE 533 CO 3CNo. 2533
6/30/12
Noel G. rj
Senior Staff ngineer
RCM:NGB:dmc
(4) Addressee
(e-mail) Diamond Lane Contractors
Attention: Mr. Rex Crabtree
Project No. 07238-42-03B - 2 - September 23, 2010
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Field Req'd.
Field Re!. Re!.
Sample Dens. Comp. Comp.
Test No. Date Location No. (pcO (%) (%)
AC 1 06/14/10 College Blvd 9l+30 AC1 142.6 97 95
AC 2 06/14/10 College Blvd 90+20 AC1 141.9 96 95
AC 3 06/14/10 College Blvd 88+50 AC1 142.0 96 95
AC 4 06/14/10 College Blvd 87+00 AC1 143.4 97 95
AC 5 06/14/10 College Blvd 86+00 AC1 142.8 97 95
AC 6 06/30/10 El Camino Real 16+25 AC2 142.9 97 95
AC 7 06/30/10 El Camino Real 15+50 AC2 143.7 98 95
AC 8 06/30/10 El Camino Real 14+55 AC2 144.2 98 95
AC 9 06/30/10 College Blvd 93+75 AC3 142.8 94 95
AC 10 06/30/10 College Blvd 92+50 AC3 140.7 93 95
AC 11 06/30/10 College Blvd 9l+75 AC3 139.6 92 95
AC 12 06/30/10 College Blvd 90+50 AC3 140.9 93 95
AC 13 06/30/10 College Blvd 89+25 AC3 141.3 93 95
AC 14 06/30/10 College Blvd 88+00 AC3 142.7 94 95
AC 15 06/30/10 College Blvd 86+40 AC3 140.8 93 95
AC 16 06/30/10 El Camino Real 16+00 AC3 140.3 92 95
AC 17 06/30/10 El Camino Real 15+40 AC3 139.9 92 95
AC 18 06/30/10 El Camino Real 14+20 AC3 141.8 93 95
Project No. 07238-42-03B September 23, 2010
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Test No. Date Location
Elev.
or
Depth
1t)
Curve.
No.
Plus
3/4
Rock
(°'°)
Field
Dry
Dens.
Field
Moist.
Cont.
(pcO
Field
Re!.
Comp.
Reqd.
Re!.
Comp.
B. 1 06/08/10 Left Turn Lane-College Blvd 90+25 0 2 0 141.1 6.3 95 95
B 2 06/08/10. Left Turn Lane-College Blvd 9 1+00 0 2 0 142.3 6.1 96 95
B 3 06/10/10 'Left Turn Lane-College Blvd 89+25 0 2 0 140.6 6.0 95 95
B 4 06/10/10 Left Turn Lane-College Blvd 88+00 0 2 0 141.3 5.4 95 95
B 5 06/10/10 Left Turn Lane-College Blvd 86+75 0 2 0 140.8 5.7 95 95
B 6 06/10/10 Left Turn Lane-El Camino Real 14+25 0 4 0 117.2 10.9 96 95
B 7 06/10/10 Left Turn Lane-El Camino Real 15+00 0 4 0 116.4 12.4 95 95
B 8 06/10/10 Left Turn Lane-El Camino Real 16+00 0 4 0 116.3 12.0 95 95
B 9 06/10/10 Left Turn Lane-El Camino Real 16+80 ' 0 4 0 120.4 11.0 98 95
Project No. 07238-42-03B September 23, 2010
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Test No. Date Location
Elev.
or
Depth
(t)
Curve
No.
Plus
3/4"
Rock
(%)
Field
Dry
Dens.
(pcO
Field
Moist.
Cont.
(%)
Field
Rel.
Comp.
(%)
Reqd.
Rel.
Comp.
(%)
CO 1 04/30/10 Clk.Dld9li-00 0 1 0 103.3 22.4 91 95
CO 2 04/30/10 Cu1kaLD1vd90+25 0 1 0 105.1 20.2 92 95
Co 3 04/30/10 Clk Dld 89+50 0 1 0 103.0 22.1 91 95
Ca 4 04/30/10 Dld 00+75 0 1 0 105.0 19.0 93 95
CO 5 04/30/10 Clk BlJ 8775 0 1 0 104.9 21.0 92 95
CO C 04/30/10 Dld 07+00 0 1 0 106.3 19.7 93 95
CO 7 04/30,'lO Clk.BlJ0C+00 0 1 0 106.6 10.5 94 95
CC
CO
CG
CO
CO
CO
CO
CO
CO
CO
CO
CO
CO
0
9
9A
10
10A
11
12
13
14
15
16
17
18
05/11/10 Cl1Dld9160
05/13/10 College Blvd 87+50
05/14/10 College Blvd 87+50
05/14/10 College Blvd 89+50
05/14/10 College Blvd 89+50
05/14/10 College Blvd 88+50
05/14/10 College Blvd 86+50
05/14/10 College Blvd 91+50
05/14/10 College Blvd 90+50
05/17/10 College Blvd 92+80
05/17/10 College Blvd 92+10
05/17/10 College Blvd 93+75
05/17/10 College Blvd 94+15
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
2
2
2
2
2
2
2
2
2
2
2
0
0
0
0
0
0
0
0
0
0
0
0
0
101.2
135.1
142.1
137.6
141.8
142.1
142.4
141.9
142.0
141.9
140.4
140.8
141.7
20.6
6.1
6.3
5.8
6.0
6.4
6.1
6.5
6.3
7.3
7.2
7.3
7.0
09
91
96
93
96
96
96
96
96
96
95
95
96
95
95
95
95
95
95
95
95
95
95
95
95
95
Project No. 07238-42-03B September 23, 2010
TABLE I
SUMMARY OF FIELD DENSITY TEST RESULTS
Elev. Plus Field Field Field Reqd.
or 3/4 Dry Moist. Rel. Rel.
Depth Curve Rock Dens. Cont. Comp. Comp.
Test No. Date Location (ft) No. (%) (pci) (%) (%) (%)
SO 1 05/27/10 Median Isand-College Ave 86+25 0 1 0 100.3 17.3 88 90
SO 1 A 06/10/10 Median Isand-College Ave 86+25 0 1 0 103.9 17.3 91 90
SO 2 05/27/10 Median Isand-College Ave 87+25 0 1 0 103.8 16.5 91 90
SG 3 05/27/10 Median Isand-College Ave 88+00 0 1 0 101.3 15.8 89 90
SO 3 A 05/28/10 Median Isand-College Ave 88+00 0 1 0 105.9 16.3 93 90
SO 4
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
05/28/10 Median Isand-College Ave 89+00 0 1 0 104.0 15.9 91 90
SO 5 05/28/10 Median Isand-College Ave 90+00 0 1 0 103.6 16.7 91 90
SG 6 05/28/10 Median lsand-Co1lege Ave 91+00 0 1 0 108.3 15.6 95 90
SO 7 06/01/10 Left Turn Lane-College Blvd 88+40 0 1 0 109.4 16.0 96 95
50 8 06/01/10 Left Turn Lane-College Blvd 87+40 0 1 0 104.1 19.6 92 95
SO 8 A 06/01/10 Left Turn Lane-College Blvd 87+40 0 1 0 108.1 18.9 95 95
30 9 06/02/10 Ui Dld 06-i-90
06/02110
0
0
1
1
0
0
102.3
99.1
22.1
24.6
90
07
93
95 30 10
30
SO
11
12
06/02/10
06/02/10 Left Turn Lane-College Blvd 90+50
0
0
1
1
0
0
102.6
102.6
21.1
21.1
90
90
95
95
SO 12 A
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
06/03/10 Left Turn Lane-College Blvd 90+50 0 1 0 108.6 18.3 96 95
SO 13 06/02/10 Left Turn Lane-College Blvd 91+50 0 1 0 103.8 20.9 91 95
SO 13 A 06/03/10 Left Turn Lane-College Blvd 91+50 0 1 0 108.4 18.1 95 95
50 14 06/02/10 Median Isand-College Ave 92+00 0 1 0 106.7 17.4 94 90
SO 15 06/02/10 Median Isand-College Ave 93+00 0 1 0 104.1 17.1 92 90
SO 16
------------------------------------------------------------------------------------------------------------------------------------------------------------------------
06/02/10 Median Isand-College Ave 94+00 0 1 0 104.7 16.9 92 90
SO 17 06/04/10 Left Turn Lane-College Blvd 89+75 0 1 0 108.0 18.6 95 95
SO 18 06/04/10 Left Turn Lane-College Blvd 88+75 0 1 0 107.8 18.4 95 95
50 19 06/10/10 Left Turn Lane-El Camino Real 15+70 0 3 0 113.7 12.2 97 95
SG 20 ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ 06/10/10 Left Turn Lane-El Camino Real 16+00 0 3 0 112.9 13.7 96 95
30
30
21
22
06/10/10 Ut qFw,, L-El earni= Rmi 15+00
06/10/10 14--70
0
0
3
3
0
0
104.0
104.6
10.5
22.4
09
09
95
95
Project No. 07238-42-0B September 23, 2010
TABLE I
EXPLANATION OF CODED TERMS
- TEST SUFFIX
A, B, C,... : Retest of previous density test failure, following moisture conditioning and/or recompaction.
- TRll(L-OIJT -
Fill in area of density test failure was removed and replaced with properly compacted fill soil.
- PREFIX CODE DESIGNATION FOR TEST NUMBERS
AC - ASPHALT CONCRETE B - BASE
CG -CURB AND GUTTER SG - SUBGRADE
-CURVE NO.
Corresponds to curve numbers listed in the summary of laboratory maximum dry density and optimum
moisture content test results table for selected fill soil samples encountered during testing and observation.
- ROCK CORRECTION
For density tests with rock percentage greater than zero, laboratory maximum dry density and optimum
moisture content were adjusted for rock content. For tests with rock content equal to zero, laboratory
maximum dry density and optimum moisture content values are unadjusted.
- TYPE OF TEST
SC: Sand Cone Test (ASTM D 1556)
NU: Nuclear Density Test (ASTM D 6938)
OT: Other
- ELEVATION/DEPTH
Test elevations/depths have been rounded to the nearest whole foot.
- LOCATION DESCRIPTION
(IP): Indicates in-place tests. Where (IP) appears in the location description, the compaction procedures
were not observed by a representative of Geocon. Tests were taken at the surface or in test pits after
placement of the fill. The results of these tests are indicative of the relative compaction at the location of
the test only and may not be extrapolated to adjacent areas. Geocon has no opinion regarding the relative
compaction of fill in adjacent areas.
Project No. 07238-42-03B . September 23, 2010
TABLE II
SUMMARY OF LABORATORY MAXIMUM DRY DENSITY AND
OPTIMUM MOISTURE CONTENT TEST RESULTS
ASTMD1557
Sample - Maximum Optimum
°. N Description Dry Density Moisture Content
(pcf) (% dry weight)
1 Yellowish brown, Sandy CLAY; trace gravel 113.7 15.9
2 Dark olive gray, fine to coarse, Sandy GRAVEL; little silt 148.2 5.3 (CLASS II BASE)
3 Dark olive brown, fine to coarse, Sandy CLAY 117.3 13.5
4 Grayish brown, fine to coarse, Sandy GRAVEL; trace silt 122.5 10.5
TABLE III
SUMMARY OF LABORATORY TEST RESULTS FOR ASPHALT
CONCRETE THEORETICAL MAXIMUM AND HVEEM DENSITY
ASTM D 2041, D 2726, AND D 1560
Test 2009
Sample Greenbook
No. Aggregate Theoretical Hveem Percent Specifications
Size (inch) Maximum Maximum Air Voids Stability Stability Density (pcf) Density (pcf)
AC-1 3/4 151.6 147.2 3 40 ~35
AC-2 3/4 151.1 146.6 3 35 ~35
AC-3 ½ 155.5 151.8 3 10 ~!23
Project No. 07238-42-03B • September 23, 2010
TABLE IV
SUMMARY OF LABORATORY ASPHALT CONCRETE GRADATION AND
ASPHALT CONTENT TEST RESULTS
ASTM C 136 AND 06307
3/4-Iflch Aggregate Greenbook
Test Type Section 203-6.4.3
Sample No. AC-1 Sample No. AC-2 Class B
Sieve Analysis
ASTM C 136 (% passing) (% passing) (% passing)
(sieve size)
1 inch 100 100 100
3/4 inch 99 99 87-100
V2 inch .79 82 70-87
% inch 69 66 55-76
No. 4 48 49 35-52
No. 8 33 35 22-40
No. 30 18 18 8-24
No. 200 4 5 0-7
Oil Content (%)*
5. 2 5. 6 4.5-5.8 ASTM D 6307
*Greenbook refers to as "Asphalt %."
TABLE V
SUMMARY OF LABORATORY ASPHALT CONCRETE
GRADATION AND ASPHALT CONTENT TEST RESULTS
ASTM C 136 AND D 6307
'/z-Inch Aggregate Greenbook Section 203-11.3 Test Type Class GC-C Sample No. AC-3
Sieve Analysis ASTM C 136 (% passing) (% passing) (sieve size)
3/4 inch 100 100
½ inch 90 90-100
% inch 75 78-92
No.4 46 28-42
.
No. 8 30 15-25
No. 30 19 5-15
No. 200 17 12-7
Project No. 07238-42-03B September 23, 2010