HomeMy WebLinkAbout3890; MAHR RESERVOIR; AS-GRADED COMPACTION REPORT; 2007-01-10••,
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City of Carlsbad January 10, 2007
5950 El Camino Real Contract No.: 131376
Carlsbad, CA 92008
Attention: Mr. John Maashoff
.Subject: As-Graded Compaction Report
Project: MAHR Reservdir
East of Rancho Santa Fe Road
Carlsbad, CA
References: 1. "Geotechnical and Limited Environmental Evaluation, Encino Basin
Phase II Recycled Water Distribution System, Stanley A. IvIAHR
Reservoir, Carlsbad Califi)rnia," prepared by Ninyo and Moore, dated
October 24, 2003.
2. Construction Plans/hr MAHR Reservoir Improvements, Contract
No. 38901, prepared by CGvL Engineers, dated January 2005.
Dear Mr. Maashoff:
In accordance with your request, Testing Engineers San Diego (TESD) has conducted grading
observations and compaction testing on the earthwork performed at the above referenced project
site. Services described herein were provided by TESD from March 30, 2006 to November 17,
2006.
A representative of this office observed the 6 foot over-excavation of the equipment building pad
in general accordance with the above referenced geotechnical investigation. The exposed sub-
grade of the over-excavation bottom was scarified a minimum of 8-inches, moisture conditioned,
and compacted. A minimum of 90 percent of the maximum dry density was obtained per ASTM
D1557 method 'at random spot locations prior to fill placement. Fill was moisture conditioned,
placed, and compacted. A minimum of 90 perceiitof the maximum density was obtained at
random spot locations. The parking area located east of the building pad was filled up to design
sub-grade and tested fora minimum 95 percent of the maximum dry density in the upper I foot of
sub-grade. It should be noted that compaction testing on the rock base section was not requested
nor performed within the parking areas. Compaction operations on utility trench lines were also
observed and tested for compliance with the project plans.
Summaries of laboratory and field compaction test results are provided, in Appendix A, Tables
I and 2, respectively. On site and import materials were used during the grading operations. The
fill was placed, compacted, and tested for compliance with a miniil1um 90% and 95% relative
compaction requirement, as applicable.
Testing Engineers San Diego, Inc.
A Bureau Veritas Company Main (858) 715-5800
7895 Convoy Court, Suite 18 Fax (858715-5810
San Diego, CA 92111 www.us.bureauveritas.com
City Of Carlsbad Contract No.: 131376 MA}-IR Reservoir
It should be noted that the precision of the field and laboratory maximum dry density test results
are subject to variation inherent with Itesting procedures and heterogeneous material
characteristics. Quantitative values of testing precision have been documented by the American
Society of Testing and Materials. For example, results indicate the accuracy of the ASTM D-
1557 test to be plus or. minus 4 percent of the mean density. Based on this information, relative
compaction results should be interpreted as approximate values subject to variations in lateral and
vertical directions.
Survey lines and elevations relative to grade modifications, final design grades, locations of
various elements, etc., were established by others.
Field Monitoring services provided by this office, consisting of visual observation of compaction
operations and random in-place density test, are intended as assistance to the owner/client in
monitoring apparent reasonable compliance with 'the project earthwork specifications. The
presence of our field representative during the work progress did not involve any direct
supervision of the contractor/subcontractor. Technical advice and suggestions were provided
upon request based upon the results of the tests and observations. In any case, no' warranty or
responsibility for the contractor's performance is intended or implied.
Based on the observations and testing made during construction by TESD representatives, it is our
opinion that the equipment building and parking lot grading was constructed in general conformance
with the approved project plans andspecifications, and is considered suitable for the intended use.
If you should have any questions after reviewing this report, please do not hesitate to contact the
undersigned at (858) 715-5800.;
Respectfully 'submitted,
TESD, Inc.
Nick Tracy, EIT
Staff Engineer
NTIVO
Attachments: Appendix A: Table I and Table 2
Distribution : (4) Addressee
*Includes copies for Building Department submittal.
/
V- - (4'INN OAP ( No. C-600
No. GE-2578
76 \
Exp. 6/30/08 1
* ACE, RGE j• Van W. Olin, GE 25
Principal Geotechn
e
City of Carlsbad Contract No.: 131376 MAHR Reservoir
Appendix A
City of Carlsbad Contract No.: 131376 MAHR Reservoir
TABLE!
RESULTS OF MAXiMUM DENSITY TESTS
(ASTM-D-1557)
SAMPLE # DESCRIPTION MAXIMUM DRY OPTIMUM MOISTURE
DENSITY (PCF) CONTENT (%)
V On-site: Lt. Brown Silty SAND 130.5
V
9.5
2 import: Brown-Orange Silty SAND wi 126.5 9.0 Gravel
3 Import: Rock Base 145.0 5.5
4 Import: Red-Orange Silty SAND wl 131.0 9.5 Gravel
Contract Number: 131376
Project Name: MAHR Reservoir
Location: Carlsbad, California
TABLE 2
REPORT OF COMPACTION TEST DATA
Test I Test I Sample
#
I
Date
I
Test Location I I I Moisture I I I EIe.
I Dry Density (pcf) I Relative Compaction I I Conform I I I
Non,-Conform Field I Opt. Field Maximum Obtained Required
1 1 51412006 west End of Equip bldg. Pad 594.4 15.67o 9.5'Vo 117.5 130.5 90% 90'Yo uontorm 2 1 5/4/2006 East End of Equip Bldg. Pad 594.6 14.7% 9.5% 119.8 130.5 92% 90% Conform 3 1 5/4/2006 Center of Equip -Bldg. Pad 592.7 13.5% 9.5% 120.8 130.5 93% 90% Confomi 4 1 5/12/2006 Center of Equip Bldg. Pad 594.2 10.4% 9.5% 1174 130.5 90% 90% Conform 5 1 5/16/2006 Electrical Trench, Center ofPad 594.4 9.9% 9.5% 120.4 130.5 92% 90% Conform 6 2 5/1.7/2006 West.Endofquip Bldg. Pad 596.0 10.6% 9.0% 115.2 126.5 91% 90% Conform 7 2 5/17/2006 . East End of Equip Bldg. Pad. 596.0 9.7% 9.0% 116.7 126.5 92% 90% Conform 8 2 5/18/2006 West End of Equip Bldg;Pad 597.0 10.1% 9.0% 117.5 126.5 . 93°k 90% Conform 9 2 5/18/2006 East End of Equip Bldg. Pad 597.0 10.2% 9.0% 118.5 126.5 94% 90% Conform 10 1 5131/2006 Parking-Area East Side of Keyway. 592.6 10.4% 9.5% 119.9 1305 92% 90% Conform 11 1 5/31/2006 Parking Area West Side of Keyway 592.4 10.2% 9.5% 119.4 130.5 91% 90% Conform 12 1 6/1/2006 Parking Area, West End 596.7 9.7% 9.5% 118.1 130.5 90% 90% Conform 13 1 6/1/2006 Parking Area, East End 596.0 9.9% 9.5% 118.9 130.5 91% 90% Conform 14 1 6/2/2006 Equipment Bldg Pad Slope West End 595.6 8:7% 9.5% 119.0 130.5 . 91% 90% Conform 15 1 6/2/2006 Equipment Bldg. Pad Slope East End 596.0 9.5% 9.5% 119.5 130.5 92% 90% Conform .16 1 6/5/2006 Equipment Bldg. Pad Slope West End 595.0 9.8% 9.5% 119.8 130.5 92% 90% Conform 17 1 6/5/2006 Equipment Bldg. Pad Slope East End 594.0 10.0% 9.5% 122.5 130.5 94% 90% Conform 18 1 6/6/2006 Equipment Bldg. Pad Slope West End 596.0 9.4% 9.5% 124.9 130.5 96% 90% Conform 19 1 6/6/2006 Equipment Bldg. Pad Sloe East End
. 594.0 9.7% 9.5% 123.8 130.5 95% 95% Conform 20 1 617/2006 Equipment Bldg. Pad Slope Center 545.0 9.7% 9.5% 124.2 130.5 95% 95% Conform 21 1 6/8/2006 Radius Slopé@ Parking Area, NE 596.0 9.2% 95% 124.9 130.5 96% 95% Conform Radius
22 1 6/8/2006 Radius Slope @ Parking Area, NE 594.0 9.0% 9.5% 124.6 130.5 95% 95% Conform Radius
23 4. 8/21/2006 Conduit Bank Trench, top of Dam, Trench -5'SG 11.9% 9.5% 121.5 131.0 93% 90% Conform Bottom, North End of Trench
24 4 8/21/2006 Conduit Bank Trench, top of Dam, Trench -5'SG 13.8% 9.5% 122.6 131.0 94% 90% Conform Bottom, Center of Trench
25 4 8/21/2006 Conduit Bank Trench, top of Dam, Trench -5'SG 12.5% 9.5% 122.0 131.0 93% 90% Conform Bottom, South End of Trench
Contract Number: 131376
Project Name: MAHR Reservoir
Location: Carlsbad; California
TABLE 2
REPORT OF COMPACTION TEST DATA
Test
#
Sample Test
Test Location Ele.
Moisture I Dry Density (pcf) Relative Compaction Conform
Date Field Opt. Field Maximum Obtained Required Non-Conform 26 4 8/21/2006 Conduit Bank, Face of Dam, 30' from Top -5'56 12.3% 9.5% 123.2 131.0 94% 901/0 Conform
27 4 8/22/2006 Conduit Bank, Face ofDam, 100'from -5' SG 11.5% 9.5% 121.7 131.0 93% 90% Conform Top
28 4 8/22/2006 Conduit Bank, Face of Dam, 40 From -5'SG 11:9% 9.5% 120.6 131.0 92% 90% Conform Base of Dam
29 4 8/22/2006 Conduit Bank, 20' N of Equip Bldg, Top-of -5SG 13.7% 9.5% 120:2 131.0. 92% 90% Conform Dam 30 : 4 8/24/2006 Conduit Trench, Top of Dam, South End -2'SG 12.4% .9.5% 120.6 131.0 92% 90% Conform
31 4 8/24/2006 Conduit.Trench, Topofbám, North End -2'SG 9.5% 9.5% 121.5 131.0 93% 90% Conform
32 4 8/24/2006 CànduitTrench, Face of Dam, 45' From -2'SG 11.5% 9.5% 120.4 131.0, 92% 90% Conform Top ofDam . 33 4 8/24/2006 Conduit Trench, Face of Dam, 35' From -2'SG 9.9% 9.5% 120:7 131.0 . 92% 90% Conform Base of Dam
34 4 9/26/2006 .10' N of Puilbox B, Top of Darn SG 6.0% 9.5% 118.2 131.0 90% 90% Conform 35 4 9/26/2006 15'.N of Pulibox C, Top of Darn SG 7.1% 9.5% 120.7 131.0 92% 90% Conform 36 4 9/26/2006 2_0'N of PullboxD, Top of Darn SG 7.5% 95% 118.5 1;3'1.0 90% 90% Conform 37 4 9/27/2006 Pipe Support Pedestal #6 Footing, Face 540.0 9.5% 9.5% 119.9 131.0 92% 90% Conform of Dam: . .
38 4. 9/27/2006 Pipe Support Pedestal #5 Footing, Face 545.0 8.7% 9.5% 118.2 131.0 90% 90% Conform of Dam
39 4 P9/27/2006 Pipe Support Pedestal #4 Footing, Face 550.0 10.7% 9.5% 121.2 131.0 93% 90% Conform of Dam
40 4 9/27/2006 :Pipe Support Pedestal #3 Footing, Face 558.0 9:1% 9.5% 121.8 131.0 93% 90% Conform of Dam
V .
. 41 4 97/2006 Pipe Support Pedestal #2 Footing, Face 562:0 11.1% 9.5% 122.1 131.0 . 93% 90% Conform of Dam . V. 42 4 9/27/2006 Pipe Support Footing, Face of Dam 568.0 10.7% 9.5% 120.0 131.0 92% 90% Conform 43 4 9/27/2006 Pipe Support Pedestal #5 Footing, Face 570.0 12.4% 9.5% 120.6 131.0 92% 90% Conform of Dam
.
Contract Number: 131376
Project Name: MAHR Reservoir
Location: Carlsbad, California
TABLE 2
REPORT OF COMPACTION TEST DATA
Test Moisture Dry Density (pcf) Relative Compaction Conform Test Sample Test Location Ele.
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Date, Field Opt. Field Maximum Obtained .'Required Non-Conform
44 4 ' 9/27(2006 North Sideot Conduit incasement, Face 547.0 7.9'b 9.5% ' 113.5 1.31.0 47o 30'% Conform of Dam
45 4 9/27/2006 'North Side of Conduit Incasement, Face 555.0 8.3% 9.5% 118.4 ' 131.0 90% 90% Conform of Dam
46 4 9/29/2006 Electric Trench Along Site Access'Road ' 11.1% 9.5% 124.3 131.0 95% 90% Conform
47 4 9/29/2006 Electric Trench Along Site Access Road 8.3% 9.5% 123.5 131.0 94% 906/6 Conform
48 4 9/29/2006 ElectricTrench Along Site Access Road 9.4% 9.5% 124.4 131.0 95% 90% Conform
49 4 10/2/2006 Electric Trench, Site Access Road, 7.1% 9.5% 124.2 131.0 95% 90% Conform Connection to Control Bldg.
50 4 10/2/2006 Electric Trench, Site Access Road, 11.5% 9.5% 125.3 131.0 96% 90% Conform Connection to Control Bldg.
51 4 10/4/2006 Electric Trench Along Site Access Road SG 8.3% 9.5% 124.1 ' 131.0 95% 90% Conform
52 4 10/4/2006 Electric Trench Along Site Access Road SG 9.1% 9.5% 120.1 1,31.0 92% 90% Conform
53 4 10/5/2006 Electric Trench Along Site Access Road SG 11.5% 9.5% 118.8 131.0 91% 90% Conform'
54 4 10/5/2006 Electric Trench Along Site Access Road SG 10.3% 9.5% 122.7 ' 131.0 94% 90% Conform
55 4 10/5/2006 Electric Trench Along Site Access Road SG 9.1% 9.5% 121.3 131.0 93% 90% Conform
56 4 10/6/2006 Ductile Iron Pipeline, Sta 42+00 -2'SG 8.3% '9.5% 122.0 131.0 93% 0% Conform
57 4 10/6/2006 Ductile Iron Pipeline, Sta 42+00 SG 10.3% 9.5% 123.8 131.0 95% 90% Conform
58 4 10/6/2006 Ductile Iron Pipeline, Sta 43+00 -2'SG 13.2% 9.5% 120.8 131.0 92% 90% Conform
59 4 10/6/2006 Ductile Iron Pipeline, Sta 43+00 SG 11.1% 9.5% 122.1 , 131.0 93% 90% Conform
TABLE 2
REPORT OF COMPACTION TEST DATA
Contract Number: 131376
Project Name: MAHR Reservoir
Location: Carlsbad, California
Test I Sample
#1
II Test
I
I
.. I
Test Location I
I I Ele.
Moisture I Dry Density (pcf) I I _______________________________________________________
Relative Compaction
I
Conform
Date j Field Opt. Field Maximum Obtained Required Non-Conform 60 4 10/10/2006 NW Slope, Control Bldg, Top of Slope 11.5% 9.5% 124.3 131.0 95% 90% Conform
61 4 10/10/2006 NW Slope, Control Bldg, Top of Slope 9.5% 9.5% 121.9 131.0 93% 90% Conform
62 4 10/1712006 Pipe Support Pedestal #1, Face of Dam
.. 8.7% 9.5% 121.5 131.0 93% 90% Conform
63 4 .10117/2006 Pipe Support Pedestal #3, Face of Darn 7.9% 9.5% 120.6 131.0 92% 90% Conform
64 4 10/17/2006 Pipe Support Pedestal #6, Face of Dam 9.5% 9.5% 120.4 131.0 92% 90% Conform
65 4 10/18/2006 Pipe Support Pedestal #2, Face of Dam 7.1% 9.5% 122.5 131.0 94% 90% Conform
66 4 10/18/2006 Pipe Support Pedestal #5, Face of Darn 9.1% 9.5% 123.7 131.0 946% 90°k Conform
67 4 10/24/2006 Ductile Iron RCW Line, Sta 43+00 -3SG 10.3% 9.5% 121.2 131.0 93% 90% Conform
68 4 10/24/2006 Ductile Iron RCW Line, Sta 43+00
. SG 11.9% 9.5% 122.0 131.0 93% 90% Conform
69 4 11/1/2006 Ductile Iron RCW Line, Sta 41+40 -2SG 7.9% 9.5% 122.6 131.0 94% 90% Conform
70 4 11/1/2006 Ductile Iron RCW Line, Sta 41+40 SG 9.1% 9.5%' 124.6 131.0 95% 90% Conform
71 4 11/2/2006 South Side of ConduitBank,'Face of 8.7% 9.5% 121.5 131.0 93% 90% Conform Dam, 40 From Top of Dam
72 4 11/2/2006 South Side of Conduit Bank; Face of 10.7% 9.5% 124.1 131.0 95% 90% Conform Dam, 15' From Top of Dam
73 4 11/6/2006' 'Conduit Bank,, Face of Dam, 10' From 7.5% 9.5% 125.0 131.0 95% 90% Conform Top ofDam
74 4 11/17/2006 Electric Trénch45'Eof Entrance 9:5% 9.5% 123.3 1310 94% 90% Conform Driveway