HomeMy WebLinkAboutCT 81-35; The Beach; Soils Report; 1985-05-012 I I I fNDUSTRlA1 CT. SUITE X: VISTA CA 92063
619-727-0262
CLIENT: NATIVE SUN DEV. CO.
PtLojeot: 0 Date 2: A&'
Native Sun Dev. Co.
110 Escondido Ave. Suite 103
Vista, CA 92083
Attention: Robert 0. Sukup
Subject: Report of Compaction Tests Results for all Utility
Trench Backfillsfor"The Beach" Residential Development,
Carlsbad, CA. EU~NE~N~~~~~~I~RY
Dear Mr. Sukup: 2075 Las f’atmao orhe C-d CA 920094859
The following Report presents the results of our compaction
tests performed in the Trench Backfill for Sewer, Water, Storm Drain,
and Joint Utility Lines for the subject development.
Enclosures to this Report are as follows:
Appendix A: Compaction Curve Test Data
Appendix B: (1B) Plot Plan of field density test locations
for Sewer Trench Backfill
(2B) Results of field density tests in the Sewer
Trench Backfill
Appendix C: (IC) Plot,Plan of field density test locations '-
for Water Trench Backfill
-l-
I1 IN&WSTRIAL CT. SUITE ‘A:
619-727.0262
VISTA, CA 92063
CLIENT: NA;IViSS;N DEV. CO.
Paojeti: NS 9 uate May 198;
(2C) Results of Field density test in the
Water Trench Backfill
Appendix D: (1D) Plot Plan of field density test locations
for Joint Utility Trench Backfill
(2D) Results of field density tests in the
Joint Utility Trench Backfill
Appendix E: (1E) Plot Plan of field density test locations
for Storm Drain Trench Backfill
(2E) Results of field density tests in the
Storm Drain Trench Backfill
During the period from August 1984 through April 1985,
various contractors were on the subject site to install under-
ground utilities and recompact the backfill soil within the
trenches. Different methods of compaction were employed in the
trench backfill operation to achieve the required compaction
such as: wheel rolling with a tractor or a loader, backhoe
mounted vibrating plate (Hoe-pat), and a hand trench packer.
All three methods were successful in the recompaction of the
trench backfills when the moisture content of the soil exceeded
the optimum moisture for each soil type.
All utility trenches were periodically inspected during
installation and backfill operations by a representative of
this firm.
-2-
cm I~auA*-m* .uw*WH*W
nscour~.Io *on rr*ruo
cwsr”lKnM r”wrcrloN
11 INLXJSTRIAL CT. SUITE ‘A: VISTA. C3 92063
619-727-0282
CLIENT-: NATIVE SUN DEV. CO.
Project: NSD 983 1 Date May 198;
Density tests were performed at various depths in
backfill soils for verification of moisture content and dry density.
As indicated on the Compaction Test Data Enclosures, compaction of'
the backfill materials met or exceeded 90% of the Maximum Dry Density
as determined by ASTM Test Procedure D-1557-70.
In the case of failing density tests, the contractors were
informed of the areas that required additlonal compactive effort.
All failing areas of the trench backfills were reworked and retested
until a 90% relative compaction was achieved.
All density tests taken in the various trench backfills
for the subject project were performed in accordance with the
City of Carlsbad requirements and accepted engineering practices.
B & 8 Engineers and Associates appreciate this opportunity to
be of service. Should you have any questions regarding this project,
please do not hesitate to contact us.
Sincerely,
452YZas ,
President
ACB/DPS/emb
-3-
APPENDIX A
r
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2111 INDUSTRIAL CT. SUITE %A: VISTA CA92083
619-727-0282
CLIENT: NATIVE !JJN DEV. CD. PROJECT: "THE BEACH" Csbd.
COMPACTION CDRVE TEST DATA
DATE: t'!dy~*1985
Soil
Type
1
2
Soil Description
Tan-Brown Silty SAND (SM)
Tan-Orange-Brown Silty SAND (SM)
)ptimum 4aximumDry loisture (%I Densitycpcf
8.5 128.5
9.5 125.5
FNrl I-KIIRF II&\
A PP.END.lX B
cl
!st YO. -
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
fr: 1
Test
Date
-30-E
II
-14-E
II
II
II
II
II
6,
II
-21-E
-24-E
II
u
,I
II
I,
II
,I
II
2111 INDUSTRIAL CT. SUITE ‘A: VISTA, CA 92083
FIVE SUN DEV.
Test
Location
Main
Main
Main
Main
Lateral
Lateral
Lateral
Force Main
Main
Lateral
Main
Lateral
Main
Lateral
Lateral
Lateral
Main
Main
Lateral
Lateral
nd Notes:
:o.
Test
l/cJeptt
36"
36"
60 "
24"
24"
24"
24"
20"
36"
24"
24"
24"
36"
24"
24"
24"
60"
24"
24"
24"
s!J
hi1
be -
1
1
2
2
2
2
1
2
2
2
1
1
1
2
2
1
2
2
1
1
-
XT l-
619-727-0282
': “THE BEACH"
Dry xi -
109,
117.
106.
108.
109.
104.
123.
117.
1110~.
108.
120.
122.
122.
118:
114.
120.
113.
113.
119.
116.
0WF.l
Id
,o
3
8
3
3
9
6
1
0
3
3
6
4
9
0
0
7
5
6
3
4
ty. PCf
Naxlmm
128.5
128.5
125.5
12.5.5
125.5
125.5,
128.5
125.5
125.5
125.5
128.5
128.5
128.5
125.5
125.5
128.5
125.5
125.5
128.5
128.5
:sbd. Ml-E:
MOIS e, 2
Field opt.
6.2 8.5
13.0 '8.5
7.6 9.5
7.3 9.5
5.9 9.5
6.4 9.5
11.6 8.5
9.4 9.5
6.5 9.5
7.1 9.5
11.1 8.5
13.5 8.5
14.5 8.5
13.0 9.5
15.7 9.5
11.1 8.5
9.9 9.5
8.5 9.5
12.9 8.5
15.9 8.5
lav 1985
Relative
omoactlon
85
91
85
86
87
84
96
93
88
86
94
95
95
95
91
93
91
90
93
91
SEWER
tetest
NO.
(13)
(17)
(18)
(16)
(15)
(13)
(12)
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APP.ENDlX c
L! 3
as.1 Test
NO. Date - -
1 -14-
2 11
3 II
4 II
5 11
6 II
7 11
8 II
9 -2o-
to 1,
Ll II
.2 II
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Pmcourlca .“O sol, m*nNo coIIsmc.wIm mwtcn~
2111 INDUSTRIAL CT. SUITE ‘A: VISTA, CX9208S
1 SUN DEV, 0 +
Test Test
Location l/Dept
I Lateral 24"
Nain 2 4 "
Lateral 18 "
Main 18 "
Lateral 2 4 "
Main 3 0 "
Lateral 2 4 "
Lateral 24"
I Lateral 24 "
Main 30"
Lateral 24"
Lateral 2 4 "
nd Notes:
F.%
SO11
be -
1
2
2
1
1
1
2
2
1
1
1
1
-
619-727-0262
': "THE BEACH'
Dry 1 ity..pcf
Field biaximun
115. 128.:
113. 125.E
114. 125.5
12~4. i2 8 . E
112. 128.5
111. 128.5
112. 125.:
108. 125.E
121. 128.E
124. 128.5
119. 128.E
122. 128.5
s_bd. HE:
Ibis ‘es %
Field opt.
11.1 8.5
io.1 9.5
11.0 9.5
12.4 8.5
5.6 8.5
10.1 8.5
8.1 9.5
5.5 9.5
11.1 8.5
11.2 8.5
14.2 8.5
10.9 8.5
tay 1985
Relative
Zompaction
90
90
92
97
88
86
90
87
95
97
93
95
WATER
tetest
NO.
(9)
(10)
(11)
COMPACTION TEST DA -A CUP, ncIIDC.. I ,P \
A PP.ENDJX
,.,
D
1
2
3
4
5
6
7
8
9
10
11
IT:
Test
Date
.- 18-
II
II
JIVE SUN WV 1
Test
Locatfon
Main
Main
Main
Lateral
Main
Main
Main
Main
Lateral
Main
Lateral
lents nd Notes:
cm, ANa MUU” I*omc*“s . IAND WMWNO PfKcolArm A*0 mu ,E*N(Io cawr”wmlN w*xnoN
2111 INDUSTliiAL CT. SUITE ‘A: VISTA, CA 92093
Test
[l/Depth
18”
12”
18”
18”
18”
12”
12”
12”
20”
12”
18”
!m
Soil
Tw -
1
1
1
1
1
1
2
2
1
2
1
-
619-727-0292
Dry De Ity, pcf WlS~ e, %
Field Nsximum Field opt.
119.6
127.3
119.5
124.3
118.8
122.0
102.7
114.5
117.9
118.5
119.5
128.5
128.5
128.5
128.5
I,
125.5
125.5
128.5
125.5
128.5
10.6 8.5 93
9.8 8.5 99
9.3 8.5 93
9.6 8.5 97
7.3 8.5 92
9.4 8.5 95
8.1 9.5 82
8.7 8.5 91
10.9 8.5 92
7.6 9.5 94
8.4 8.5 93 ‘.
hd. WE: 5
Relative
:ompaction
letest
NO.
(10)
JOINT UTILITY
~CIMPAf?Tlf7iV TFCT ,.-7A TA _..^. ^^*.-r s-s.\
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2 111 INDUSTRIAL CT. SUITE ‘A: VISTA. CA 92063
619-727-0262
&IW: NATIVE SUN DEV. CO. mu: "THE BEACH" Csbd. HE: May 1985
,st Test Test Test Soil Dry Density,,pcf Moisture, Z Relative Retest YO. Date Location El/Depth Type Field Maximums ! Field opt. Compaction No.
1 8-21-84. Main 24" 1 125.8 128.5 10.1 8.5 98
2 " Main 24" 2 119.6 125.5 13.9 9.5 95
3 'I Main 36” 2 117.6 125.5 12.0 9.5 94
4 " Main 48” 2 117.5 125.5 9.5 9.5 94
5 ” Main 24” 1 118.3 128.5 9.1 8.5 92
._
,
mComments and Notes: ,,.
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