HomeMy WebLinkAboutX2018-0379 - Soilsconsultants
CITY OF NEWPORT BEACH
Building Department
100 Civic Center Drive
Newport Beach, CA 92660
X,201$-0378
6-0,9 4c0C;A 4 V engineering
geotechnical
applications
October 14, 2019
Project No. WP034.2
Subject: FINAL GRADING CERTIFICATE
HARDSCAPE COMPACTION, UTILITY TRENCH BACKFILL
AT NEW RESIDENTIAL PROPERTY LOCATED at
602 ACACIA AVENUE
CORONA DEL MAR, CALIFORNIA
City of Newport Beach Permit No.: 03112018
References:
1. "Geotechnical Investigation for Proposed, Residential Duplex Located at 602 Acacia Avenue, Corona Del Mar,
California," by EGA Consultants dated July 28, 2017.
2. "602 Acacia Duplex, Building Plans" by Brandon Architects, Inc., last dated March 22, 2018.
3. 'Precise Grading Plan, 602 Acacia Avenue, Corona Del Mar, CA," by Forkert Engineering & surveying, Inc. dated
December 19, 2017.
4. "Compaction Report for Placement of Fill within Limits of Residential Building Pad at 602 Acacia Avenue, Corona Del
Mar, California," by EGA Consultants, Inc., dated May 31, 2018,
To City Building/Grading Officials:
In accordance with the City of Newport Beach building and grading requirements, we are
submitting this final compaction report for the grading of the subject building pad, utility trench
backfill, and exterior improvements. The site earthworks operations were performed by the
sub -contractor, Tight Quarters, Inc.
Excavation and grading of the subject lot commenced on May 21, 2018 and was completed on
May 24, 2018. All flatwork subgrade was completed by October 10, 2019.
Site grading included the removal of the upper 3 of the old fill and native material located within
the limits of the new building pad and exterior improvements. A minimum 12 inches of
engineered fill was placed below all future footing bottom elevations.
Prior to the placement of fill, the excavation bottoms were inspected and approved by a
Certified Engineering Geologist employed by EGA Consultants. The exposed surface was
scarified and recompacted to a minimum of 90% relative compaction. Field density test results
are tabulated on Table 1, Summary of Field Density Tests.
One 953-C Caterpillar tractor front loader, one jumping -jack Wacker, one vibratory plate, and
water hoses were utilized for the purposes of compaction and grading control. All earthwork
operations were performed under continuous observations by this firm and were performed in
accordance with geotechnical specifications outlined in the Soils Report dated July 28, 2017
375-C Monte Vista Avenue • Costa Mesa, CA 92627 • (949) 642-9309 • FAX (949) 642-1290
I certify that all grading and compaction work was done in compliance with the soils report for
this project and the work complies with City of Newport Beach grading regulations. All soils
values and geotechnical specifications outlined in the soils report remain valid.
Based on our continuous observations and testing, the subject and adjacent sites are not
impacted by the site grading operations to date.
This opportunity to be of service is appreciated. If you have any questions, please call.
Very truly yours,
EGA Consultants, Inc.
,
DAVID A. WORTHINGTON CEG 2124
Principal Engineering Geologist
Copies'. (2) Addressee
(1) Walerpointe Custom Home Builders, Inc., Attn: Matt Kincheloe
FINAL COMPACTION REPORT:
602 Acacia Avenue, Corona Del Mar, CA
Project No. WP034.2
October 14, 2019
OF
TABLE 7
SUMMARY OF MOISTURE DENSITY RELATIONSHIPS
(ASTM: D1556)
Sample
Depth
Dry
Moisture
Maximum
Optimum
Relative
Number/
Below
Density
Content
Density
Moisture
Compaction
Location
Pad ft
PCF
°/d'
PCF
%
°/a
FD -1
3.0
115.7
10.7
123.0
10.0
94
E Central
Pad
FD -2
2.0
114.7
10.8
123.0
10.0
93
NE Edge
Pad
FD -3
1.5
117.1
10.5
123.0
10.0
95
SE Edge
Pad
FD -4
3.0
118.6
10.9
123.0
10.0
96
W Central
Pad
FD -5
2.0
116.0
10.4
123.0
10.0
94
SW Edge
Pad
FD -6
0.5
117.2
10.6
123.0
10.0
95
NW Central
Pad
FD -7
FG
118.1
10.7
123.0
10.0
96
SW Central
Pad
FD -8
FG
116.9
10.6
123.0
10.0
95
NE Central
Pad
FD -9
FG
118.4
10.6
123.0
10.0
96
SW Central
Pad
FD -10
FG
119.6
10.4
123.0
10.0
97
Central Pad
FD -11
FG
117.4
10.7
123.0
10.0
95
Utility
Trench
Backfill
FD -12
FG
118.3
10.3
123.0
10.0
96
Flatwork
FINAL COMPACTION REPORT:
602 Acacia Avenue, Corona Del Mar, CA
Project No. WP034.2
October 14, 2019
FD -13
Flatwork
FG
119.6
10.5
123.0
10.0
97
FD -14
FG
116.9
10.6
123.0
10.0
95
Area Drain
Backfill
FD -15
FG
116.7
10.2
123.0
10.0
95
Driveway/
Carport
Area
"FG" = Finish Grade (Ground Level Pad).
TABLE 2
SUMMARY OF MAXIMUM DENSITY TEST
(ASTM D 1557)
Sample
Maximum
Optimum
Location
Density
Moisture
Pcf
%
FIII (per Soils Report
123.0
10.0
dated July 28, 2017)
FINAL COMPACTION REPORT:
602 Acacia Avenue, Corona Del Mar, CA
Project No. WP034.2
October 14, 2019
consultants
CITY OF NEWPORT BEACH
Building Department
100 Civic Center Drive
Newport Beach, CA 92660
engineering
geotechnical
application r
May 31, 2018
Project No. WP034.2
Subject: COMPACTION REPORT FOR PLACEMENT OF FILL
WITHIN LIMITS OF RESIDENTIAL BUILDING PAD AT
602 ACACIA AVENUE
CORONA DEL MAR, CALIFORNIA
City of Newport Beach Permit No.: 0311-2018
References:
"Geotechnical Investigation for Proposed, Residential Duplex Located at 602 Acacia Avenue, Corona Del
Mar, California," by EGA Consultants dated July 28, 2017.
"602 Acacia Duplex, Building Plans" by Brandon Architects, Inc., last dated March 22, 2018.
"Precise Grading Plan, 602 Acacia Avenue, Corona Del Mar, CA," by Forkert Engineering & Surveying, Inc.
dated December 19, 2017.
To City Building/Grading Officials:
In accordance with the City of Newport Beach building requirements, we are submitting this
compaction report for the grading of the subject building pad. This report includes the test
results performed at the subject lot during the placement of on-site soil material in the area of
the proposed residential building pad. The site earthworks (excavation) operations were
performed by the sub -contractor, Tim Greenleaf Engineering.
Excavation and grading of the subject lot commenced on May 21, 2018 and was complete by
May 24, 2018. The building and garage pad consists of a 3 foot over -excavation, with native
spoils used for backfill
Prior to the placement of fill, the excavation bottoms were inspected and approved by a
Certified Engineering Geologist employed by EGA Consultants. The exposed surface was
scarified, moisture conditioned and recompacted to a minimum of 90% relative compaction.
The upper two feet of backfill was treated with Portland Cement, using approximately 8 bags
per 8 inch lift. Field density test results are tabulated on Table 1, Summary of Field Density
Tests.
One CAT 953-C front loader was utilized for the purpose of compaction and grading control.
Water was added via a 2 -inch fire hose and moisture contents were at near -optimum moisture
levels. All earthwork operations were performed under continuous observations by this firm and
were performed in accordance with geotechnical specifications outlined in the referenced soils
report dated July 28, 2017.
The building pad was graded in accordance with the 2016 CBC and the City of Newport Beach
Building standards and are approved for construction. Based on our continuous observations
and testing, the subject and adjacent sites are not impacted by the site grading operations to
date.
375-C Monte Vista Avenue • Costa Mesa, CA 92627 • (949) 642-9309 • FAX (949) 642-1290
This report includes the test results performed at the subject site during the placement of on-
site and imported soil material in the area of the proposed building pad. Additional
observations and testing are required in areas to receive exterior improvements
(driveway approach, patio flatwork, drainage, etc.) and utility trench backfill.
I certify that all rough grading work was done in compliance with the above -referenced soils
report and the work complies with City of Newport Beach grading regulations. All soils values
and geotechnical specifications outlined in the Soils Report remain valid.
This opportunity to be of service is appreciated. If you have any questions, please call.
Very truly yours,
EGA Consultants, Inc. �EFtED
Davidq,,
� Worthington
DAVID A. WORTHINGTON CEG 2124 * N0• CEG2124
Principal Engineering Geologist N� CER77RED
9a ENGINEER NG it) I
Copies: (2) Addressee
(1) Waterpoinle Custom Home Builders, Inc.
PAD CERTIFICATION REPORT:
602 Acacia Avenue, Corona Del Mar, CA
Project No. WP034.2
May 31, 2018
TABLET
SUMMARY OF MOISTURE DENSITY RELATIONSHIPS
(ASTM: D1556)
Sample
Depth
Dry
Moisture
Maximum
Optimum
Relative
Number/
Below
Density
Content
Density
Moisture
Compaction
Location
Pad ft
PCF
%
PCF
%
FD -1
3.0
115.7
10.7
123.0
10.0
94
E Central
Pad
FD -2
2.0
114.7
10.8
123.0
10.0
93
NE Edge
Pad
FD -3
1.5
117.1
10.5
123.0
10.0
95
SE Edge
Pad
FD -4
3.0
118.6
10.9
123.0
10.0
96
W Central
Pad
FD -5
2.0
116.0
10.4
123.0
10.0
94
SW Edge
Pad
FD -6
0.5
117.2
10.6
123.0
10.0
95
NW Central
Pad
FD -7
FG
118.1
10.7
123.0
10.0
96
SW Central
Pad
FD -8
FG
116.9
10.6
123.0
10.0
95
NE Central
Pad
FD -9
FG
118.4
10.6
123.0
10.0
96
SW Central
Pad
FD -10
FG
119.6
10.4
123.0
10.0
97
Central Pad
"FG" = Finish Grade (Ground Level Pad).
TABLE 2
SUMMARY OF MAXIMUM DENSITY TEST
(ASTM D 1557)
Sample
Maximum
Optimum
Location
Density
Moisture
Pc
Fill (per Soils Report dated 7/28/17)
123.0
10.0
PAD CERTIFICATION REPORT:
602 Acacia Avenue, Corona Del Mar, CA
Project No. WP034.2
May 31, 2018