NCG140419_MONITORING INFO_20190509

STORMWATER DIVISION CODING SHEET
NCG PERMITS
PERMIT NO.
Iv '1 �Dyl
DOC TYPE
❑HISTORICAL FILE
p( MONITORING REPORTS
DOC DATE
❑ ���g l7
YYYYMMDD

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
1 QTR
0 Ong — State
0 Copy — State
0 Copy — Plant
0 Copy File
CERTIFICATE OF COVERAGE NO Ni 0 41 9 RECEIVEDIPLE COLLECTION YEAR 2019
AMPLE QUARTER ®Jan -March ❑April -June ❑Jul -Sept ❑Oct -Dec
FACILITY NAME Chandler Concrete Piedmont - WINSTON #1 10PERSON COLLECTING SAMPLES SCALES AY�,1COUNTY FOR5YTH
CERTIFIED LABORATORY Pace Analytical Lab #633 _iy t i%01%,L FONONE NO [phone]
qR SECTIMD TO LISTSERVE? DYES ®NO EMAIL
LIMIT VIOLATIONS? YES ® NO ❑ DISCHARGING TO CLASS ❑SA ❑HOW ❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
Part Wastewater Monitoring Requirements
Non Polar
Date Sample
Type
Total Suspended
Settleable
Oil & Grease
Discharge
Total Flow
Outfall No
Collected'
RMWastewater
{VE, Mp}z
n
(stand ard) d
Solids
Solids
using method
Duration
7
{gallons/day)
(mm/ddJyr}
,
(mg/L)
(ml./L}
1664 SGT-HEA46
(minutes)
(mg/L)
-
6 934
3035
S3
(15)6
-
1
NO FLOW
VE RM MD
-
-
N/A
N/A
-
NIA
No Discharge this Period -
' If wastewater systems have not discharged in this quarter — report No Flow or No Discharge here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VET Raw Material Stockpiles (Ri Mixing Drum Cleanout { MD} Reportmore
than one type if the waste -stream is commingled (� pF lyOE D
'if an effluent limit is exceeded twice in a row the permittee is required to institute monthly monitoring for that parameter for six months unless Di RO s o i yo t
continue monitoring
° pH limits are 6 9 S U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaters
MAY 09Z019
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications CENTRAL FILES
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wPt tTlQKad is subject to
benchmarks and provisions of Part IV Section A including the Tiered Response Action
'Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A NCAC 028 0224 Perm ittees
who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DEMLR If the permittee cannot obtain a Summer 7Q10 flow for the receiving waters at the
discharge location the permittee shall notify DEMLR and the DEMLR Regional Office may require an annual flow report on a case by case basis
Permit Date 8/1/2017 06/30/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Resources
Attn DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly
responsible for gathering the information the information submitted is to the best of my knowledge and belief true accurate and complete I am aware that there are
significant penalties fWsubmitting false information including the possib�hty of fines and imprisonment for knowing violations'
¢z /
(Signature of Per ee) { ate}
V� 2
Permit Date 8/1/2017 06/30/2022 Last Revised 07/27/17
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete Piedmont - WINSTON #118
PERSON COLLECTING SAMPLES SCALES RECEIVED
CERTIFIED LABORATORY Pace Analytical Lab #633
NOV 0 6 291b
LIMIT VIOLATIONS'> YES ® NO ❑
CENTRAL FILES
Part A Wastewater Monitoring Requirements DWR SECTION
3QTR
Ong - State
0 Copy - State
0 Copy - Plant
0 Copy File
SAMPLE COLLECTION YEAR 2018
SAMPLE QUARTER ❑Jan -March ❑April -June ®Jul -Sept ❑Oct -Dec
COUNTY FORSYTH
PHONE NO [phone]
ADD TO LISTSERVE7 [-]YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
Non Polar
`
Date Sample
Type of Wastewater
pH
Total Suspended
Settleable
Oil & Grease
Discharge
Total Flow
Outfall No
1
Collected
(VE RM MD) z
{standard)
Solids
Solids
using method
Duration
{gallons/clay) '
(mm/dd/yr)
(mg/L)
{mL/L)
16645GT--HEM6
(minutes)
(mg/L)
-
-
6 934
3035
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
N/A
N/A
-
N/A
No Discharge this Period -
' If wastewater systems have not discharged in this quarter —report No Flow or No Discharge here Please make sure to mark the sample quarter above
'Report the abbreviation for the type of Authorized wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles IRM) Mixing Drum Cleanout (MD) Report mare
than one type if the waste stream is commingled
'If an effluent limit is exceeded twice in a row the permittee is required to institute monthly monitoring for that parameter for six months unless DEMLR RO staff notifiesyou to
continue monitoring
41 limits are 6 9 S U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaiers
S TSS limits are 20 mg/L for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters, and 30 ni for all other water classifications
b Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater but instead is subject to
benchmarks and provisions of Part IV Section A including the Tiered Response Action
Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQw waters shall be set to 50% of the Summer 7Q10 Flow as per 15A NCAC 02B 0224 Permittees
who discharge wastewater to FiQW waters shall obtain a Summer 7Q10 flow and report this information to DEMLR If the permittee cannot obtain a Summer 7Q10 flow for the receiving waters at the
discharge location the permittee shall notify DEMLR and the DEMLR Regional Office may require an annual flow report on a case by case basis
Permit Date 8/1/2017-06/30/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY INCLUDING ALL "NO FLOW" "NO DISCHARGE" WITHIN 30 DAYS OF RECEIPT OF SAMPLE OR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Resources
Attn DWR Central Files
1617 Mall Service Center
Raleigh North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
" 1 certify under penalty of law that this document and all attachments were prepared under mydirection or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or personas who manage the system or those persons directly
responsible for gathering the information the information submitted is to the best of my knowledge and belief true accurate and complete I am aware that there are
significant penalties forAbmitting false information including the possibility of fines and imprisonment for knowing violations"
(Signature of Perm
Permit Date 8/1/2017 06/30/2022
/ a ',1 e
(D (te)
Last Revised 07/27/17
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete Piedmont - WINSTON #118
PERSON COLLECTING SAMPLES SCALES
CERTIFIED LABORATORY Pace Analytical Lab #633 RECEIVED
LIMIT VIOLATIONS? YES ® NO ❑ AUG 0 3 2M
CENTRAL, FILES
Part A Wastewater Monitoring Requirements DVVR
2 QTR
Ong — State
0 Copy — State
0 Copy — Plant
0 Copy File
SAMPLE COLLECTION YEAR 2018
SAMPLE QUARTER ❑Jan -March ®April -June ❑Jul -Sept ❑Oct -Dec
COUNTY FORSYTH
PHONE NO [phone]
ADD TO LISTSERVE10 ❑YES ®NO EMAIL
DISCHARGING TO CLASS ❑5A ❑HQW ❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
Non -Polar
Date Sample
Type of Wastewater
pH
Total Suspended
Settleable
Oil & Grease
Discharge
dotal Flow
Cutfall No
1
Collected
(VE RM MD) s
(standard]
Solids
Solids
using method
Duration
tgallons/day)
(mm/dd/yr)
(mg/L)
(mL/L)
1664SGT-HEM6
(minutes)
(mili
-
6 934
303S
53
(15)6
1
NO FLOW
VE RM MD
-
-
N/A
WA_
-
N/A
No Discharge this Period -
i If wastewater systems have not discharged in this quarter —report No Flow or No Discharge' here Please make sure to mark the sample quarter above
'Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM) Mixing Drum Cleanout (MD) Report more
than one type if the waste stream is commingled
'if an effluent limit is exceeded twice in a row the permittee is required to institute monthly monitoring for that parameter for six months unless DEMLR RO staff notifies you to
continue monitoring
4 pH limits are 6 9 5 U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications
e Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater but instead is subfect to
benchmarks and provisions of Part IV Section A including the Tiered Response Action
'Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A NCAC 02B 0224 Permittees
who discharge wastewater to HQW waters shall obtain a Summer 7QI0 flow and report this information to DEMLR If the permittee cannot obtain a Summer 7Q10 flow for the receiving waters at the
discharge location the permittee shall notify DEMLR and the DEMLR Regional Office may require an annual flow report on a case by case basis
Permit Date 8/1/2017 06/30/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE FOR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW" TO
Division of Water Resources
Attn DWR Central Fiies
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUSTSIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering t e information the information submitted is to the best of my knowledge and belief, true accurate and complete I am aware that there are
significant penalties for mitten false information including the possibility of fines and imprisonment for knowing violations'
ignature of Permute ( (ate)
Permit Date 8/1/2017 06/30/2022 Last Revised 07/27/17
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PEERMIIT No NCG140000
MtC
APR 2 6 2m
1 QTR
&,-4�Upy
Ong — State
--Sbte
0
Copy Winston
0
Copy — Plant
0
Copy File
CERTIFICATE OF COVERAGE NO NCG14 0 41 9 CENTRAL f-II~ES,aMPLE COLLECTION YEAR 2018
dWR SECTIQ,SAMPLE QUARTER ®Jan -March ❑April -June ❑Jul -Sept ❑Oct -Dec
FACILITY NAME Chandler Concrete Piedmont - WINSTON t#118
PERSON COLLECTING SAMPLES SCALES COUNTY FORSYTH
CERTIFIED LABORATORY Pace Analytical Lab ##633 PHONE NO [phone]
ADD TO LISTSERVE7 ❑YES ®NO EMAIL
LIMIT VIOLATIONS? YES ® NO ❑ DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
Part A Wastewater MonitorinR Requirements
Non Polar
Date Sample
Total Suspended
Settleable
Oil & Grease
Discharge
Outfall No
Collected)
Type of Wastewater
pH
Solids
Solids
using method
Duration
Total Flow
(mm/dd/yr)
(VE, RM, MD} Z
(standard)
(mg/L)
(mL/L)
1664SGT-HEM6
(minutes)
{gallons/day} '
(mg/L)
6-934
3035
53
(15)6
1
02/12/18
VE RM MD
78
177
N/A
N/A
30
N/A
Discharge was result of rain event - SW comingles with Process Water
�L►�..��.4 J1-...91 ... L&A.1.�...-,. �.,��� .�. ..�.... ..... ....11 ����.�,.-�� ��.�.��.. ��..11�....1.. i...�l .1......- �.. .........,.�k �......� �....
1 If wastewat
Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM) Mixing Drum Cleanout (MD) Report more
than one type if the waste stream is commingled
'If an effluent limit is exceeded twice in a row the permtttee is required to institute monthly monitoring for that parameter for six months unless DEMLR RO staff notifies you to
continue monitoring
° pH limits are 6 9 S U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaters
s TSS limits are 20 rri for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications
e Process wastewater discharges shalt only be monitored for TPH when commingled with stormwater discharges from VIVA areas TPH does not have a limit for wastewater but instead is subject to
benchmarks and provisions of Part IV Section A including the Tiered Response Action
'Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A NCAC 02B 0224 Permittees
who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DEMLR If the permtttee cannot obtain a Summer 70.10 flow for the receiving waters at the
discharge location the permtttee shall notify DEMLR and the DEMLR Regional Office may require an annual flow report on a case by case basis
Permit Date 8/1/2017-06/30/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Resources
Attn DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly
responsible for gathering the information the information submitted is to the best of my knowledge and belief true accurate and complete I am aware that there are
significant penalties f_or submitting false information, including the possibility of fines and imprisonmentfor knowing violations'
(S�gnalure of Permi
Permit Date 8/1/2017 06/30/2022
z l�
(Da e) /
Last Revised 07/27/17
Page 2 of 2

PROCESS WASTEWATER— Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
4 QTR
oe Ong - State
0
Copy - State _
0
Copy Winston
0
Copy - Plant -
0
Copy File
CERTIFICATE OF COVERAGE NO NCG14'0 41.9 SAMPLE COLLECTION YEAR 2017
1 i�SAMPLE QUARTER ❑Jan -March ❑April -June ❑Jul -Sept ®Oct -Dec
FACILITY NAME Chandler Concrete Piedmont - WINSTON 'FIVE
PERSON COLLECTING SAMPLES SCALES COUNTY FORSYTH
CERTIFIED LABORATORY Pace Analytical Lab #633 FEB 0 5 2013 PHONE NO [phone]
CENTR2 \I- FILE ADD TO LISTSERVE? [:]YES ®NO EMAIL
LIMIT VIOLATIONS? YES ❑ NO ® pw� SECTICI+j� DISCHARGING TO CLASS ❑SA (:]HOW❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
Part A Wastewater Monitoring Requirements
Non -Polar
Date Sample
Type of Wastewater
pH
Total
Total Suspended
Settleable
Oil & Grease
Discharge
Flow
Outfall No
Collected Y
(VE, RM, MD) z
(standard)
Solids
Solids
using method
Duration
(gallons/day)
(mm/dd/yr)
(mg/L)
(mL/L)
1664,SGT NEM6
(minutes)
3
(mg/L)
- -
6 934
3035
53
F (15)6
1
NO FLOW
VE RM MD
-
-
N/A
N/A
-
N/A
No Discharge this Period -
1 If wastewater systems have not discharged in this quarter — report No Flow' or No Discharge' here Please make sure to mark the sample quarter above
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM) Mixing Drum Cleanout (MD) Report more
than one type if the waste stream is commingled
'If an effluent limit is exceeded twice in a row the permittee is required to institute monthly monitoring for that parameter for six months unless DEMLR RO staff notifies you to
continue monitoring
4 pH limits are 6 9 5 U for wastewater discharges to freshwaters and 6 8 8 5 5 U for discharges to saitwaters
TSS limits are 20 mg/L for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater but instead is subject to
benchmarks and provisions of Part IV, Section A including the Tiered Response Action
7 Flow rate Can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50%of the Summer 7Q10 Flow as per 15A NCAC 02B 0224 Permittees
who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DEMLR If the permittee cannot obtain a Summer 7Q10 flow for the receiving waters at the
discharge location the permittee shall notify DEMLR and the DEMLR Regional Office may require an annual flow report on a case by case bans
Permit Date 8/1/2017 06/3D/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGES WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Resources .` `
,Attn DWR Central Files a
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
� 3
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my knowledge and belief true, accurate and complete I am aware that there are
significant penalties for sub ing false information, including the possibility of fines and imprisonment for knowing violations "
�9-��- --
(Si nature of ermittee) (D e)
Permit Date 8/l/2017-06/30/2022 Last Revised 07/27/17
Page 2 of 2

PROCESS WASTEWATER —Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete Piedmont - WINSTON #118
PERSON COLLECTING SAMPLES SCALES
CERTIFIED LABORATORY Pace Analytical Lab #633 RECEI VEE)
LIMIT VIOLATIONS? YES ❑ NO ® NOV 02 201?
CENTRAL FILES
Part A Wastewater Monitoring Requirements
3QTR
Ong — State
0 Copy — State
0 Copy - Winston
0 Copy — Plant
0 Copy File
SAMPLE COLLECTION YEAR 2017
SAMPLE QUARTER ❑Jan -March ❑April -June ®Jul -Sept ❑Oct -Dec
COUNTY FORSYTH
PHONE NO [phone]
ADD TO LISTSERVE? ❑YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA ❑HOW ❑PNA ❑Trout ®Other WS-V NSW
OPTIONAL INFO
ury
Nan -Polar
Date Sample
Type of Wastewater
pH
Total Suspended
Settleable
Oil & Grease
Discharge
Total Flow
Outfall No
1
Collected
2
(VE, RM MD)
(standard)
Solids
Solids
using method
Duration
(gallons/day)
(mm/dd/yr)
(mg/L)
(mL/L)
6
16645GT NEM
(minutes)
(mg/L)
-
-
-
6 934
3035
53
(15)6
-
-
1
9/13/17
VE RM MD
8 7
151
N/A
N/A
120
N/A
Discharge was result of ram event - SW comingles with Process Water
1 If wastewater systems have not discharged in this quarter— report No Floyd or No Discharge here Please make sure to mark the sample quarter above
r Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM) Mixing Drum Cleanout (MD) Report more
than one type if the waste stream is commingled
31f an effluent limit is exceeded twice in a row the permittee is required to snstitute monthly monitoring for that parameter for six months unless DEMLR RO staff notifiesyou to
continue monitoring
" pH limits are 6 9 S U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater but instead is subject to
benchmarks and provisions of Part IV Section A including the Tiered Response Action
'Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A NCAC 028 0224 Permittees
who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DEMLR If the permittee cannot obtain a Summer 7010 flow for the receiving waters at the
discharge location the permittee shall notify DEMLR, and the DEMLR Regional Office may require an annual flow report on a case by case basis
Permit Date 8/1/2017-06/30/2022 Last Revised 07/27/17
Page 1 of 2

MAIL ORIGINAL AND ONE COPY _OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR AT END
OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Resources
Attn DWR Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
r _ t
YOU MUSTSIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that
qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or those persons directly }
responsible for gather g the information the information submitted is, to the best of my knowledge and belief, true, accurate, and complete I am aware that there are
significant penalties submitting false information including the possibility of fines and imprisonment for knowing violations"
(Signature of Pe
Permit Hate 8/1/2017-06/30/2022
Last Revised 07/27/17
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 4 19 SAMPLE COLLECTION YEAR 2016
FACILITY NAME Chandler Concrete/Piedmont Inc e�+_ �lv�E�AMPLING PERIOD ❑ July -December
PERSON COLLECTING SAMPLES i COUNTY Forsyth
CERTIFIED LABORATORY Pace Analytical Lab #633 JUL 2 4 1011 PHONE NO (336) 725 - 9401
OPTIONAL INFO T ADD TO LISTSERVE? [_]YES ®NO EMAIL
CENTRAL FILES DISCHARGING TO CLASS [:]SA ❑HQW
DWIR SECTION NSW
Part A Stormwater Monitoring Requirements
FORM
V Ong - State
0 Copy - State
0 Copy - Plant
0 Copy File
® January -June
❑PNA ❑Trout ®OtherWS-V,
Outfall No
Date Sample
Collected
( mo/dd/yr OR
NO FLOW) t
pH
(Standard Units)
TS5
(mg/L)
Event
Duration
(minutes]
Total a
Rainfall
(in)
In Tier 2
Monthly
Monitoring �
(y/n)
# of Months in
Tier 2 Sampling2
-
6-92
10022,
1
NO FLOW
-
-
-
-
N
N/A
No Discharge
this Period
i If NO FLOW" or "NO DISCHARGE, Enter "NO FLOW" or "NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
r If a value is in excess of the benchmark or outside the benchmark range (for pH), you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
a TSS benchmark values are 100 mg/I except when discharging to ORW, HQW, Trout, and PNA waters where they are 50 mg/I
For each sampled measurable storm event the total precipitation must be recorded using data from an on site rain gauge
Permit Date 7/1/2011 60/30/2015 Last Revised 7/13/11
Page 1 of 2

Part B Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month —averaged over a calendar year
Outfall
No
Date Sample
Collected
(mo/dd/yr)'
pH
(Standard
Units)
TPH using method
1664A SGT-HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
Rainfall a
(in)
New Motor OilIn
Usage
(gal/month)
Tier 2
Monthly
Monitoring?
(y/n)
9 of Months
in Tier 2
Sampling2
6-92
152
10013
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail Orwinal and one coov of this DMR (including all "No Flow" & "No Discharge" reports) within 30 days of receipt of sample (or at end of monitonnR period
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directtebsponsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true accurate, and complete
am awar�thatl;AA r ig ificant penalties for submitting false information, including the possibility a fines nd imprisonment for knowing violations "
(Signature of Permittee) (te)
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

PROCESS WASTEWATER -- Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
C �
Ong - State
0
Copy - State
0
Winston Office
0
Copy - Plant
0
Copy - File
CERTIFICATE OF COVERAGE NO NCG14 0 419 SAMPLE COLLECTION YEAR 2017
FACILITY NAME Chandler Concrete/Piedmont Inc -Plant 118 SAMPLE QUARTER ❑Jul -Sept ❑Oct -Dec []Jan -March ®April -June
PERSON COLLECTING SAMPLES COUNTY Forsy1h
CERTIFIED LABORATORY Pace Analytical Lab #633 yPPHONE NO (336) 72S - 9401
RECEIVEADD TO LISTSERVE? ❑YES ®NO EMAIL
LIMIT VIOLATIONS? YES ❑ NO ® JUL 2 4 2017 DISCHARGING TO CLASS ❑SA []HQW ❑PNA ❑Trout ®Other WS-V,
NSW
CENTRAL FILES OPTIONAL INFO
Part A Wastewater Monitoring Requirements DWR SECTION
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)=
pH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
S T-HEM6
Discharge
Duration
(minutes)
Total Flow
(gallons/day)'
-
-
&93 A
304 s
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
P -
-
-
-
No
Discharge this Period -
a If wastewater systems have not discharged in this quarter— report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
if an effluent limit is exceeded twice in a row the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
pH limits are 6-9 5 U for wastewater discharges to freshwaters, and 6 8-8 5 5 U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
' Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE-) WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"1 certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations
re of Perm
Permit Date 7/1/2011-6/30/2016
(Date)
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monito�rn''rrCrt`o
GENERAL. PERMIT No NCG140000 Receiveul
JUL 2 4 1017
CERTIFICATE OF COVERAGE NO NCG14 0 4 19
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES [:]NO
Part A Wastewater Monitoring Requirements
0 Ong - State
0 Copy - State
0 Winston Office
0 Copy - Plant
0 Copy - File
SAMPLE COLLECTION YEAR 2017 Winston-S,!em
SAMPLE QUARTER ❑Jul -Sept 00ct-Dec1a1 L❑Jan-March ®April -June
COUNTY Forsyth
PHONE NO (336)725 - 9401
ADD TO LISTSERVE? ❑YES ENO EMAIL
DISCHARGING TO CLASS ❑SA [:]HQW ❑PNA []Trout ®Other WS-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected 1
(mm/dd/yrj
Type of Wastewater
(VE, RM, MD)Z
pH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mLAI
TPH usingDischarge
method 1664A
SGT-HEM6
, (mg/L)(minutes]
Duration
Total Flow
(gallons/day)'
-
-
-
6-93 °
3W 5
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Discharge this Period -
' If wastewater systems have not discharged in this quarter — report "No Flow' or "No Discharge" here Please make sure to mark the sample quarter above
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
'if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring r
pH limits are 6-9 5 U for wastewater discharges to freshwaters, and 6 8-8 5 5 U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
' Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to 50% of the Summer 7Q10 Flow as per 15A
NCAC 020 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW "NO DISCHARGF!j WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
L v
(Sian ture of Permitt
Permit Date 7/1/2011-6/30/2016
7
(Date)
Last Revised 07/27/14
Page 2 of 2

ate
PROCESS WASTEWATER — Quarterly Discharge Monitoring Report 0 Copy state
GENERAL PERMIT NO NCG140000 0 Winston Office
0 Copy — Plant
0 Copy — File
CERTIFICATE OF COVERAGE NO NCG14 0 4 19 SAMPLE COLLECTION YEAR 2017
FACILITY NAME Chandler Concrete Piedmont Inc - Plant 118 SAMPLE QUARTER ❑Jul -Sept ❑Oct -Dec ®Jan -March ❑April -June
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
COUNTY Forsyth
RE�a 'eE V[�^�P,HONE NO (336) 725 - 9401
V E I Y ADD TO LISTSERVE? ❑YES ®NO EMAIL
APR 2 4 2017 DISCHARGING TO CLASS [:]SA []HQW ❑PNA ❑Trout Mother WS-V,
NSW
CENTRAL FILES OPTIONAL INFO
DWR SECTION
Outfall No
Date Sample
i
Collected
(mm/dd/yr)
Type of Wastewater
z
(VERMMD)
, ,
pH
{standard]
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH usingDischarge
method 1664A
SGT-NE
[mg/L )
Duration
(minutes)
Total Flow
7
{gallons/day)
-
-
-
6-9 34
303 5
53
(15),
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Discharge this Period -
1 If wastewater systems have not discharged in this quarter— report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3 if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
s TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
e Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011 6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly response le for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that a are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations " /
ature of Permittee)
Permit Date 7/1/2011 6/30/2016
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 4 19
FACILITY NAME Chandler Concrete/Piedmont. Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633RECEIVED
LIMIT VIOLATIONS? YES ❑ NO ® FEB 0 7 2017
CENTRAL FILES
Part A Wastewater Monitoring Requirements DWR SECTION
7( Ong — State
0
Copy — State
0
Winston Office
0
Copy — Plant
0
Copy — File
SAMPLE COLLECTION YEAR 2017
SAMPLE QUARTER ❑Jul -Sept ®Oct -Dec ❑Jan -March ❑April -June
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 DYES ONO EMAIL
DISCHARGING TO CLASS ❑SA [—]HQW ❑PNA ❑Trout ®Other WS-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)
PH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
SGT NEB
(mg/L)
Discharge
Duration
(minutes)
Total Flow
(gallons/day)
-
-
-
6-934
3025
53
(1S)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
No
Discharge this Period -
' If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge' here Please make sure to mark the sample quarter above
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
31 f an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8-8 5 5 U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

f1b.-
MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE"] WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
vinlatinnc " . '----�//
11
ature of Permitteej
Permit Date 7/1/2011 6/30/2016
Z7 //17
(Date)
Last Revised 07/27/14
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 4 19
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES cn
CERTIFIED LABORATORY Pace Analytical Lab �CEIVED
OPTIONAL INFO FEB 0 7 7017
CENTRAL FILES
Part A Stormwater Monitoring Requirements DWR SECTION
SAMPLE COLLECTION YEAR 2016
SAMPLING PERIOD ® July -December
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 ❑YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA ❑HQW
NSW
FORM
Ong - State
0 Copy - State
0 Copy - Plant
0 Copy File
❑ January -June
❑PNA ❑Trout ®OtherWS-V,
Outfall No
Date Sample
Collected
(mo/dd/yr OR
NO FLOW)
pH
(Standard units)
TSS
(mg/L)
Duration
(minutes)
TotalEvent
Rainfall Rnfall4
(in)
In Tier 2
Monthly
Monitoring?
(y/n)
It of Months in
Tier 2 Sampling
-
69
100 23
-
-
-
-
1
NO FLOW
-
-
-
-
N
N/A
No Discharge
this Period
1 If NO FLOW or NO DISCHARGE Enter "NO FLOW or "NO DISCHARGE' for each outfall here Please make sure to mark the sample period above
2 If a value is in excess of the benchmark, or outside the benchmark range (for pH) you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/l, except when discharging to ORW HQW Trout, and PNA waters where they are 50 mg/I
° For each sampled measurable storm event the total precipitation must be recorded using data from an on site ram gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 1 of 2

Eo
Part B Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month - averaged over a calendar year
Outfall
1110
Date Sample
Collected P
(mo/dd/yri
PH
(standard
Units)
TPH using method
1664A SGT--HEM
(mg/L)
Total Suspended
Solids
(mg/0
Event
Duration
(minutes)
Total
a
Rainfall
(in)
New Motor Oil
Usage
(gal/month)
In Tier 2
Monthly
Monthly
Monitoring?
(y/n)
# of Months
Tier 2
Samphng2
)-92-
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Marl Onimal and one cony of this DMR fincludrne all "No Flow" & "No Discharge" reports) within 30 days of receipt of sample (or at end of monitoring period
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly r sponsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aware thatx-4er e sigpd!cant penalties for submitting false information, including the possibility of fines end imprisonment for knowing violations "
/Z7117
(Signs ure of Permittee) (Date) l
Permit Date 7/1/2011 60/30/2015 Last Revised 7/13/11
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING FORM
GENERAL PERMIT NO NCG140000
Ong - State
CERTIFICATE OF COVERAGE NO NCG14 0 4 2 6 SAMPLE COLLECTION YEAR 2017 0 Copy — State
SAMPLING PERIOD Jul December Januar Jenne 0 Winston -Office
FACILITY NAME Chandler Concrete Piedmont Inc __Plan# 1 p� ® Y- Y 0 Copy Plant
PERSON COLLECTING SAMPLES EV COUNTY Guilford 0 Copy - File
CERTIFIED LABORATORY Pace Analytical Lab #633 FEB 0 7 2017 PHONE NO (336) 378 - 1008
OPTIONAL INFO ADD TO LISTSERVE? ❑YES ®NO EMAIL _
CENTRAL FILES DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®OtherWS-V,
DWR SECTION NSW
Part A Stormwater Monitorine Receuirements
Outfall No
Date Sample
Collected
(mo/dd/yr OR
NO FLOW)t
pH
(Standard Units)
TSS
(mg/L)
Event
Duration
(minutes)
Total
Rainfall 4
(in)
In Tier 2
Monthly
Monitoring?
(y/n)
# of Months in
Tier 2 Sampling
-
-
6-92
1002 3
-
-
-
-
1
NO FLOW
-
-
-
-
N
N/A
1 If "NO FLOW" or 'NO DISCHARGE, Enter' NO FLOW' or NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
z If a value is in excess of the benchmark, or outside the benchmark range (for pH), you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/I, except when discharging to ORW, HQW Trout and PNA waters where they are 50 mg/I
° For each sampled measurable storm event the total precipitation must be recorded using data from an on site ram gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 1 of 2

Part B. Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month — averaged over a calendar year
Outfall
No
Date Sample
Collected
(mo/dd/yr)'
pH
(Standard
Units)
TPH using method
1664A SGT-HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
a
Rainfall
(in)
New Motor Oil
Usage
(gal/month)
In Tier 2
Monthly
Monitoring?
(Y/n)
# of Months
in Tier 2
2
Sampling
6-92
1s2
23
100
-
-
-
-
-
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANYONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mall OnRinaI and one coDv of this DMR (includine all "No Flow" & "No Discharee" reDorts) within 30 days of receiDt of Sam Die for at end of monitorine Deriod
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or
those persons directly r onsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aware that tyre significant penalties for submitting false information including the possibility of fines and imprisonment for knowing violations "
e/z 7//7—
(Sig�ature of Permrttee) (Da{e) l
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 4 2 6
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 117
PERSON COLLECTING SAMPLES f
CERTIFIED LABORATORY Pace Analytical Lab #66RFeEi V ED
LIMIT VIOLATIONS? YES [:]NO ® FEB 0 7 2017
CENTRAL FILES
D'VVR SECTION
Part A Wastewater Monitoring Requirements
Ong — State
0 Copy — State
0 Winston Office
0 Copy — Plant
0 Copy — File
SAMPLE COLLECTION YEAR 2017
SAMPLE QUARTER ❑Jul -Sept ®Oct -Dec []Jan -March []April -June
COUNTY Guilford
PHONE NO (336) 378 - 1008
ADD TO LlSTSERVE? ❑YES ®NO EMAIL
DISCHARGING TO CLASS [—]SA[:]HQW❑PNA —]Trout ®Other W5-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)
pH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
SG 16
(mg/L)g/L)
Discharge
Duration
(minutes]
Total Flow
(gallons/day)7
-
-
-
6-93 4
303 s
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
No Qualifyine
Discharge this Period -
I If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type it the waste -stream is commingled
3 if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VIVA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
Flaw rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by case basis
Permit Date 7/1/2011 6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mad Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations " , / ,
re of
IX7
(ante)
Permit Date 7/1/2011 6/30/2016 last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL. PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES cc �I
CERTIFIED LABORATORY Pace AnaMical Lab #6�►ECCI V ED
LIMIT VIOLATIONS) YES ❑ NO ® NQV 0 2 2016
CENTRAL FILES
DWR SECTION
Part A Wastewater Monitoring Requirements
Ong - State
0
Copy - State
0
Winston -Office
0
Copy - Plant
0
Copy - File
SAMPLE COLLECTION YEAR 2017
SAMPLE QUARTER ®JUI-Sept ❑Oct -Dec ❑Jan -March ❑April -June
COUNTY Forsy1h
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? ❑YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA []HQW ❑PNA ❑Trout ®Other W5-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)
PH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(MLA)
TPH using
method 1664A
SGT-HEM'
(mg/L)
Discharge
Duration
(minutes)
Total flow
(gallons/day)
-
-
6.93 4
303 5
53
(15)6
..
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying Discharge this Period -
' If wastewater systems have not discharged in this quarter— report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste stream is commingled
3If an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING „ALL "NO FLOW", "NO DISCHARGE) WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW" 1 TO
Division of Water Quality T
Attn DWQCentral Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware tha here are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations
ure of Pe
Permit Date 7/1/2011-6/30/2016
."b Z
(Da e)
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES ❑ NO ® RECEIVED
AUG 0 ! 2016
Cing — State
0 Copy — State
0 Copy — Plant
0 Copy File
SAMPLE COLLECTION YEAR 2016
SAMPLE QUARTER ❑Jul -Sept ❑Oct -Dec []Jan -March ZApril-June
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 []YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA [—]HQW ❑PNA ❑Trout ®Other WS-V,
NSW
CEWf?Al- FILESOPTIONAL INFO
Part A Wastewater Monitoring Requirements 'MIR FR( ow
Outfalf No
Date Sample
Collected'
(min/dd/yr)
Type of Wastewater
(VE, RM, MD)'
pH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
SGT-HEMG
(mg/L)
Discharge
Duration
(minutes)
Total Flow
(gallons/day)
-
6-93 4
3035
S3-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying
Discharge this Period -
1 If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3If an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 5 U for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50%of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW "NO DISCHARGE") WITHIN 30 _DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the Information, the Information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware t t there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
(Signature of Perm
Permit Date 7/1/2011-6/30/2016
7 2
ate)
Last Revised 07/27/14
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING
GENERAL PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE NO NCG 14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
OPTIONAL INFO ==RECEIVED
Y , L 4 2016
Part A Stormwater Monitoring Requirements �_ L
SAMPLE COLLECTION YEAR 2016
SAMPLING PERIOD ❑ July -December
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? []YES ®NO EMAIL
DISCHARGING TO CLASS []SA ❑HQW
NSW
FORM
Orig - State
0 Copy - State
0 Copy - Plant
0 Copy File
® ianuary-tune
❑PNA ❑Trout ®OtherWS-V,
Outfall No
Date Sample
Collected
(mo/dd/yr OR
NO FLOW}1
PH
(standard Units)
e � , - -'
TSS
[mg/L�
vent
Duration
(minutes)
Total {
Rainfall
(in)
/
In Tier 2
Monthly
Monitoring?
(y/n)
# of Months in
2
Tier 2 Sampling
-
-
692
100 2-3
-
1
NO FLOW
-
-
-
�' =
N
N/A
V ff i
(
o
/
20
6
—AUG-0-1
!`i=Af D
DWR SECTIC
N
If "NO FLAW" or "NO DISCHARGE, Enter "NO FLAW" or "NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
z If a value is in excess of the benchmark, or outside the benchmark range (for pH) you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/I, except when discharging to ORW, HQW, Trout, and PNA waters where they are 50 mg/i
"For each sampled measurable storm event the total precipitation must be recorded using data from an on site rain gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 1 of 2

Part B Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month —averaged over a calendar year
Outfall
No
Date Sample
Collected
(mo/dd/yr)1
pH
(Standard
Units)
TPH using method
1664A SGT-HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
a
Rainfall
(in)
New Motor Oil
Usage
(gal/month)
In Tier 2
Monthly
Monitoring?
(y/n}
# of Months
in Tier 2
s
Sampling
6-9
15
10021
-
-
-
-
-
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail Oneinal and one coov of this DMR (including all "No Flow" & "No Discharge" reoorts) within 30 days of receipt of sample (or at end of monitoring period
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699 1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly res
Ofisible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aware that t r ign t p alties for submitting false information, including the possibility of finesyan,imprisonment for knowing violations "
z
(Signature of Permittee) (D (e)
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

ate
PROCESS WASTEWATER -- Quarterly Discharge Monitoring Report 0 Copy state
GENERAL PERMIT NO NCG140000 0 Copy - Plant
0 Copy File
CERTIFICATE OF COVERAGE NO NCG14 0 419- SAMPLE COLLECTION YEAR 2016
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118 SAMPLE QUARTER ❑Jul -Sept ❑Oct -Dec ®Jan -March ❑April -June
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #i633
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
COUNTY Fors h
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 ❑YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA []HQW ❑PNA ❑Trout Zother WS-V,
NSW
OPTIONAL INFO
Date Sample
Type of Wastewater
pH
Total Suspended
Settleable
TPH using
method 1664A
D ischarge
Total Flow
Outfall Na
Collected
z
(VE, RM, MD)
(standard)
Solids
Solids
SGT-HEAe
Duration
�
(gallons/day)
(mm/dd/yr)
(ring/0
(mL/L)
(mg/L)
(minutes)
-
-
-
6-934
303S
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
_ _
-
I-Ct(.F-IVP=n
No Qualifying Discharge this Period -
�
�R SF(' 7fri�f
ij � VKMA i
lid PR0CESSlNr i 1
1 If wastewater systems have not discharged in this quarter— report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste stream is commingled
3 if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S V for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
JI F
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY INCLUDING ALL "NO FLOW" "NO DISCHARGE" WITHIN 30 DAYS OF RECEIPT OF SAMPLE OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATfON FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that ear significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations
(Signature of Permittee)
Permit Date 7/1/2011-6/30/2016
4Z6
( ate)
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Anal ical Lab #633
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
SAMPLE COLLECTION YEAR-2ftS
Ong -State
0 Copy - state
0 Copy - Plant
0 Copy - File
SAMPLE QUARTER ❑Jul -Sept ®Oct -Dec ❑Jan -March []April-Ju%
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? ❑YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®Other WS-V�
NSW O
OPTIONAL INFO
0
Outfall No
Date Sample
i
Collected
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)'
pH
(standard)
�
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
SGT-HEM'
(mg/L)
Discharge
Duration
(minutes)
Total Flow
(gallons/day)'
-
-
-
6-934
3035
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying
Discharge this Period -FEB
0
A
CENTRAL
-ILES
' If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample gtUhI�Nbi�Ve I IUN
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3If an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/l. for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part lV, Section A, including the Tiered Response Action
' Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY INCLUDING ALL "NO FLOW" "NO DISCHARGE" WITHIN 30 DAYS OF RECEIPT OF SAMPLE OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
(9119)807-6379
z �t
u
.'.+ ep
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly resp able for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware th t ere are sig ficant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations " ✓� �- .
of Permittee)
Permit Date 7/1/2011-6/30/2016
// � //4
(Date)
Last Revised 07/27/14
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING FORM
GENERAL PERMIT NO. NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 41 9
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
OPTIONAL INFO
Part A Stormwater Monitoring Requirements
SAMPLE COLLECTION YEAR 2015
SAMPLING PERIOD Z July -December
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? [-]YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA ❑HQW
NSW
/ Ong - State
0 Copy - State
0 Copy - Plant
0 Copy - File
❑ January -June
❑PNA ❑Trout ®OtherWS-V,
Outfall Na
Date Sample
Collected
(mo/dd/yr OR
NO FLOW)1
pH
(Standard Units)
TS5
(mg/L)
Event
Duration
(minutes)
Total n
Rainfall
(in)
In Tier 2
Monthly
Monitormg7
(y/n)
q of Months in
z
Tier 2 Sampling
-
6-9
1002 3
-
-
-
1
NO FLOW
-
-
-
-
N
N/A
ULIVt
CEN
HAL F!
M �
1 If NO FLOW ' or NO DISCHARGE, Enter ` NO FLOW" or "NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
2 If a value is in excess of the benchmark or outside the benchmark range (for pH), you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/I, except when discharging to ORW HQW Trout and PNA waters where they are 50 mg/I
For each sampled measurable storm event the total precipitation must be recorded using data from an on site rain gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 1 of 2

Part S Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month —averaged over a calendar year
Outfall
No
Date Sample
Collected 1
(mo/dd/yr)
pH
(Standard
Units)
TPH using method
1664A SGT-HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
Rainfall°
(in)
New Motor Oil
Usage
(gal/month)
In Tier 2
Monthly
Monitoring?
(y/n)
# of Momns
in Tier 2
Samplmg2
6-92
15 2.100
23
-
-
-
-
-
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail Onerrial and one copv of this DMR bricludrne all "No Flow" & "No Discharge" reports) within 30 days of receipt of sample (or at end of monitoring period
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly r ponsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aware that t e sficant nalties for submitting false information, including the possibility of fines nd imprisonment for knowing violations "
(Sig re of Permittee) ( ate)
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

tate
PROCESS WASTEWATER — Quarterly Discharge Monitoring Report 0 Copy -State
GENERAL PERMIT No NCG140000 0 Copy - Plant
0 Copy File
CERTIFICATE OF COVERAGE NO NCG14 0 419 SAMPLE COLLECTION YEAR-201G-ao
FACILITY NAME Chandler Concrete Piedmont Inc - Plant 118 SAMPLE QUARTER ®Jul -Sept []Oct -Dec ❑Jan -March []April -June
PERSON COLLECTING SAMPLES COUNTY Forsyth
CERTIFIED LABORATORY Pace Analytical Lab #633 PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? ❑YES ®NO EMAIL
LIMIT VIOLATIONS? YES [:]NO ® DISCHARGING TO CLASS ❑SA ❑HOW ❑PNA []Trout ®Other WS-V,
NSW
OPTIONAL INFO
Part A Wastewater Monitoring Requirements
Date Sample
1
Type of Wastewater
pH
Total Suspended
Settleable
TRH using
method 1664A
Discharge
Total Flow
Outfall No
Collected
2
(VE, RM, MD)'
(standard]
Solids
Solids
a
SG
Duration
7
(gallons/dayl
(mm/dd/yr)
(mg/L)
(m
(mg/L)L/L)
/L)
(minutes)
-
-
-
6-934
3035
53
(15),
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
��i
NOV t
2 Jiq
No Qualifying
Discharge this Period -
•, r
L FILE
ION
If wastewater systems have not discharged in this quarter — report "No Flow' or "No Discharge" here Please make sure to mark the sample quarter above
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste stream is commingled
31f an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6 9 S U for wastewater discharges to freshwaters and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
e Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50%of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY [INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
r
� s{
s w
�O
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly response le for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware ,that re re significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations
rmittee)
Permit Date 7/1/2011-6/30/2016
f"V7'D/"Y
(Dad )
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER — Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 41 9
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES �° ii
CERTIFIED LABORATORY Pace Analytical Lab oRECEIVED
LIMIT VIOLATIONS? YES ❑ NO ® JUL 31 Z015
CENTRAL FILES
DVVR SECTION
Part A Wastewater Monitoring Requirements
Ong -State
0 Copy - State
0 Copy - Plant
0 Copy File
SAMPLE COLLECTION YEAR 2015
SAMPLE QUARTER (_]Jul -Sept ❑Oct -Dec ❑Jan -March ®April -June
COUNTY Forsyth
PHONENO (336) 725 - 9401 _
ADD TO LISTSERVEI DYES [ONO EMAIL
DISCHARGING TO CLASS [-]SA ❑HQW ❑PNA [-]Trout ®Other WS-V, Fv:g
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)
PH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH usingDischarge
method 1664A
56T-Hfll'
(mg/L)
Duration
minutes)
Total Flo 7
(gallons/day)
-
-
-
6-934
3CP
53
(15)s
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying
Discharge this Period -
1 If wastewater systems have not discharged in this quarter- report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3lf an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6 9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
5 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQCentral Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that ere are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations
(Signature of Permittee)
Permit Date 7/1/2011 6/30/2016
//1 �- zr_
(D e)
Last Revised 07/27/14
Page 2 of 2

.4r _ Ong - State
PROCESS WASTEWATER — Quarterly Discharge Monitoring Report 0 Copy - State
GENERAL PERMIT NO NCG140000 0 Copy - Plant
0 Copy - File
CERTIFICATE OF COVERAGE NO NCG14 0 419 SAMPLE COLLECTION YEAR 2015
FACILITY NAME Chandler Concrete/Piedmont Inc_ - Plant 118 SAMPLE QUARTER ❑Jul -Sept ❑Oct -Dec ®Jan -March ❑April -June
PERSON COLLECTING SAMPLES COUNTY Forsyth �
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? ❑YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA ❑HQW ❑PNA ❑Trout ®Other WS-V.
NSW
OPTIONAL INFO
Outfall Na
Date Sample
1
Collected
(mm/dd/yr)
Type of Wastewater
x
(VE, RM, MD}
pH
(standard}
Total Suspended
Solids ds
(mg/L)
Settleable
Solids
(mL/L)
TPH usingDischarge
method 1664A
6
Img/L)
Duration
(minutes)
Total flow
7
(gallons/day}
-
-
-
6-934
303s
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying Discharge this Period -
-14
1 If wastewater systems have not discharged in this quarter — report 'No Flow" or "No Discharge" here Please make sure to mark the sample quarter $R
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixin
Cleanout (MD) Report more than one type if the waste stream is commingled
if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VIVIA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to 50% of the Summer 7Q10 Flow as per 15A
NCAC 028 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case -by -case basis
C�
Cm -
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly respon ble for gather ng the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware thaY.f�re are signifiXt penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
Signature of Permitte
Permit Date 7/1/2011 6/30/2016
t x !S
(Da )
Last Revised 07/27/14
Page 2 of 2

PROCESS WASTEWATER -- Quarterly Discharge Monitoring Report
GENERAL, PERMIT No NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES [:]NO
Part A Wastewater Monitoring Requirements
6%Ong - State
.FS Copy - State
0 Copy -- Plant
0 Copy File
SAMPLE COLLECTION YEAR 2015
SAMPLE QUARTER [_]Jul -Sept ❑Oct -Dec ®Jan -March ❑April -June
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 ❑YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®Other WS-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
Collected'
(mm/dd/yr)
Type of Wastewater
z
(VE, RM, MD}
pH
(standard}
Total Suspended
Solids
(mg/L)
settleable
solids
(mL/L)
TPH using
method 1664A
SGT./L) 6
[mg/L}
Discharge
Duration
(minutes)
Total Flow
7
(gallons/day}
'
-
-
6-934
3035
53
(15)6
-
-
i
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying Discharge this Period -
1 If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM) Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
31f an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to SO% of the Summer 7Q10 Flow as per 15A
NCAC 020 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case by case basis
Permit Date 7/1/2011-6/30/2016
Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW". "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO _^^
Division of water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED_
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly respo ble for gather ng the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete 1 am aware stha ere are sigmf,cnt penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations " y /,
Permittee) _
t
Permit Date 7/1/2011-6/30/2016
(Da )
Last Revised 07/27/14
Page 2 of 2

Orig - State
PROCESS WASTEWATER —Quarterly Discharge Monitoring Report 0 Copy - State
GENERAL PERMIT NO NCG140000 0 Copy - Plant
0 Copy File
CERTIFICATE OF COVERAGE NO NCG 14 0 41 9 SAMPLE COLLECTION YEAR 2015
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118 SAMPLE QUARTER ❑Jul -Sept ®Oct -Dec ❑Jan -March ❑April -June
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633bC^CIVC®
LIMIT VIOLATIONS) YES ❑ NO ® FEB 0 3 2015
CENTRAL FILES
Part A Wastewater Monitorine Reauirements DWR SECTION
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE7 [—]YES ®NO EMAIL
DISCHARGING TO CLASS ❑SA ❑HQW ❑PNA ❑Trout ®Other WS-V,
NSW
OPTIONAL INFO
Outfall No
Date Sample
1
Collected
(mm/dd/yr)
Type of Wastewater
z
(VERMMD}
, ,
pH
(standard}
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
6
SGT-HEM
(mg/L)
Discharge
Duration
(minutes)
Total Flow
gallons/day}
-
-
-
6-934
3035
53
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying Discharge this Period -
J.
1 If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
2 Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3 if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8-8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VIVIA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall be set to SO% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case by -case basis
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, worth Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that t e ar significa t penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
(Signature of Permittee) (Dite)
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING FO M
GENERAL PERMIT NO NCG140000 0 Ong - State
0 Copy - State
0 Copy - Plant
CERTIFICATE OF COVERAGE NO NCG14 0 419 SAMPLE COLLECTION YEAR 2015 0 Copy File
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118 SAMPLING PERIOD ® July -December ❑ January -June
PERSON COLLECTING SAMPLES COUNTY Forsyth
CERTIFIED LABORATORY Pace Analytical Lab #633 PHONE NO (33C) 725 - 9401
OPTIONAL INFO ��IEWEDTO LISTSERVE? []YES ®NO EMAIL
FEB 2� NSW ARGING TO CLASS [:]SA❑HQW ❑PNA ❑Trout ®OtherWS-V,
Part A Stormwater Monitoring Requirements MEIANURAL FN L-^
Outfall Na
Date
Collec CollectedSample
(mo/dd/yr OR
NO FLOW)t
pH
(Standard Units)
T5S _C
(mg/L�
Event
Duration
(minutes)
Total �
Rainfall
(in)
in Tier 2
Monthly
Monitoring?
(y/n)
aY of Months in
Tier 2 Sampling?
-
-
64
1002
-
-
-
-
1
NO FLOW
-
-
-
-
N
N/A
' If NO FLOW' or NO DISCHARGE, Enter NO FLOW or 'NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
2 If a value is in excess of the benchmark, or outside the benchmark range (for pH) you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
a TSS benchmark values are 100 mg/I except when discharging to ORW, HQW, Trout, and PNA waters where they are 50 mg/I
° For each sampled measurable storm event the total precipitation must be recorded using data from an on -site rain gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
• Page 1 of 2

Part B Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month —averaged over a calendar year
Outfall
No
Date Sample
Collected
{mo/dd/yr}1
PH
(Standard
Units)Monitoring?
nEtst
TPH using method
1664A SGT=HEM
(mg/!f
Total Suspended
Solids
{mg/L}
Event
Duration
(minutes]
Total
Rainfall"
(en}
New Motor Oil
Usage
{ga!/month]
In Tier 2
Monthly
(y/n)
q of Months
in Tier 2
z
Sam plsng
6-9
15
loci
-
1
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO ❑
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail Orminal and one coov of this DMR fincludinp- all "No Flow" & "No Discharize" retorts) within 30 days of receipt of sample for at end of monitorme neraod
in case of "No Flow") to
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified pers nel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons djrectly�onsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aw�trsf Ffica t pen (ties for submitting false information, including the possibility of fi e/a(� imprisonment for knowing violations
( ignature of Permittee) {D te)
Permit Date 7/l/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

STORMWATER DISCHARGE OUTFALL (SDO) - Semi -Annual MONITORING
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14 0 419
FACILITY NAME Chandler Concrete Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
OPTIONAL INFO
Part A Stormwater Monitoring Requirements
SAMPLE COLLECTION YEAR 2013-2014
SAMPLING PERIOD ❑ July -December
COUNTY Forsyth
PHONE NO (336) 72S - 9401
ADD TO LISTSERVEI ❑YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA ❑HQW
NSW
F RM
Ong - State
0 Copy - State
0 Copy - Plant
0 Copy File
® January -June
❑PNA ❑Trout ®OtherWS-V,
Outfall No
Date Sample
Collected
(mo/dd/yr OR
NO FLOW)'
pH
(Standard Units)
TSS
(mg/L)
Event
Duration
(minutes]
Total
4
Rainfall
(in]
In Tier 2
Monthly
Monitoring?
(y/n)
# of Months in
2
Tier 2 Sampling
-
-
6-9
100 23
-
-
-
-
1
NO FLOW
-
-
-
-
N
N/A
AUb 0 b Z014
FI
S
DWQ1B0
1 If "NO FLOW" or "NO DISCHARGE, Enter NO FLOW' or "NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
Z If a value is in excess of the benchmark, or outside the benchmark range (for pH) you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/I except when discharging to ORW, HQW, Trout, and PNA waters where they are 50 mg/I
For each sampled measurable storm event the total precipitation must be recorded using data from an on -site rain gauge
Permit Date 7/1/2011 60/30/2015 Last Revised 7/13/11
Page 1 of 2

Part B Vehicle Maintenance Activity Monitoring Requirements for facilities using > 55 gal of new motor oil/month —averaged over a calendar year
Outfall
No
Date Sample
Collected
(mo/dd/yr)'
pH
(Standard
Units)
TPH using method
1664A SGT HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
Rainfall
(in)
New Motor Oil
Usage
(gal/month)
In Tier 2
Monthly
Monitoring?
(y/n)
# of Months
in Tier 2
Samphngz
6-9
15
100
-
-
-
-
s
NO FLOW
Not Applicable - Avg <55 Gal /Mo
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NON
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail Original and one coov of this DMR (includine all "No Flow" & "No Discharge" reports) within 30 days of receipt of sarnole for at end of monitorine period
in case of "No Flow") to
Division of Water quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANYINFORMATION REPORTED
"i certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible fo gathering the information the information submitted is, to the best of my knowledge and belief, true accurate, and complete
am aware i ifican enalties for submitting false information, including the possibility of fines nd imprisonment for knowing violations "
30
(Signature of Permittee) (Ddte)
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

PROCESS WASTEWATER -- Quarterly Discharge Monitoring Report
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG 14 0 419
FACILITY NAME Chandler Concrete/Piedmont Inc - Plant 118
PERSON COLLECTING SAMPLES
CERTIFIED LABORATORY Pace Analytical Lab #633
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
\ Ong - State
0 Copy - State
0 Copy - Plant
0 Copy File
SAMPLE COLLECTION YEAR 2013-2014
SAMPLE QUARTER []Jul -Sept []Oct -Dec ❑Jan -March ®April -June
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LI5T5ERVE7 ❑YES ®NO EMAIL
DISCHARGING TO CLASS [:]SA ❑HQW ❑PNA ❑Trout ®Other WS-V,
NSW
OPTIONAL INFO
Date Sample
Total Suspended
Settleable
TPH usingDischarge
Outfall No
1
Collected
Type of Wastewater
VE, RM, MD
pH
Solids
Solids
method 1664A
SGT-HEM6
Duration
Total Flow
(mm/dd/yr)
()z
[standard}
(mg/L)
(mL/L}
(minutes)
{gallons/riay}'
(mg/L)
-
-
6 934
3035
S3
(15)6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
r
�4
No Qualifying Discharge this Period -
HU
CENT
DW
1 If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3If an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
4 pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
' Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ and the DWQ Regional Office may require an annual flow
report on a case by case basis
Permit Date 7/1/2011-6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY (INCLUDING ALL "NO FLOW", "NO DISCHARGE" j WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathers g the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that t ere are signific nt penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
(S(gnature of Permittee) (Da{e)
Permit Date 7/1/2011-6/30/2016 last Revised 07/27/14
Page 2 of 2

Y
STORMWATER DISCHARGE OUTFALL (SI] - Semi-annual MONITORING FORM
GENERAL PERMIT NO NCG140000
CERTIFICATE OF COVERAGE NO NCG14Q -!.l j
FACILITY NAME 11C.,1JA P��r-S -i4r ,�e.��r•� _._�f _
PERSON COLLECTING SAMPLES i hryl L brit
CERTIFIED LABORATORY gegg F/, qX. /►&A4&T 4b # 3�Z
Lab #
OPTIONAL INFO
Part A Stormwater Monitoring Requirements
SAMPLE COLLECTION YEAR Zo
SAMPLING PERIOD ❑ July -December anuary-June
COUNTY y7-7/
PHONE 1 c!
ADD TO LISTSERVE? ❑YES []NO EMAIL
DISCHARGING TO CLASS []SA ❑HQW ❑PNA ❑Trout [?Ether fl.455 G
Outfall No
Date Sample
Collected
(mo/dd/yr OR
NO FLOW)
P
(standard
Units)
TSS
(mh/L)
u
dration
rate
{minutes)
Total 4
Rainfall
(in)
In Tier 2
Monthly
Mo (y/ ring
n
# of Months in Tier
z
2 Sampling
-
-
6-9
100
-
-
-
-
o l
97
nr L
3100
L 6
pr=r I'
/fin
r ifs �I
-lf�
AFR V U
CENTRALFILES
ILES
DWQIB
G
' If 'NO FLOW or NO DISCHARGE Enter "NO FLOW or 'NO DISCHARGE" for each outfall here Please make sure to mark the sample period above
If a value is in excess of the benchmark or outside the benchmark range )for pH), you must implement the Tier 1 or Tier 2 responses in the General Permit Tier 2
Monthly sampling shall be done until 3 consecutive samples are below the benchmark or within the benchmark range
3 TSS benchmark values are 100 mg/I, except when discharging to ORW, HQW Trout, and PNA waters where they are 50 mg/I
"For each sampled measurable storm event the total precipitation must be recorded using data from an on -site rain gauge
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 1 of 2

,[
part B VA Maintenance Activity Monitoring Requirements for facilities using > 40 of new motor oil/month — averaged over a calendar year
Outfall
No
Date Sample
Collected 3
(mo/dd/yr)
pH
(Standard
Units)
TPH using method
1664A SGT-HEM
(mg/L)
Total Suspended
Solids
(mg/L)
Event
Duration
(minutes)
Total
Rainfall°
(in)
New Motor OilIn
Usage
(gal/month)
Tier 2
Monthly
Monitoring?
(y/n)
# of Months
in Tier 2
Samplingz
6-9
15
100 23
-
-
-
-
-
HAS YOUR FACILITY HAD 4 OR MORE BENCHMARK EXCEEDENCES AT ANY ONE OUTFALL (INCLUDING VEHICLE MAINTENANCE)? YES ❑ NO
HAVE YOU CONTACTED THE REGION? YES ❑ NO ❑
REGIONAL OFFICE CONTACT NAME
Mail OriRinal and one coov of this DMR flncluding all "No Flow" & "No Discharize" reoorts) within 30 days of receipt of samole (or at end of monitoring period
In case of "No Flow") to :
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
" I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete
am aware that there are significant penalties for submitting false information including the possibility of fines and imprisonment for knowing violations "
(Signature of Permitt4) pat )
Permit Date 7/1/2011-60/30/2015 Last Revised 7/13/11
Page 2 of 2

PROCESS WASTEWATER -- Quarterly Discharge Monitoring Report
GENERAL PERMIT No NCG140000
CERTIFICATE OF COVERAGE NO NCG14 d
FACILITY NAME uC qjq i09'3`r; y iP d.r
PERSON COLLECTING SAMPLES Tbrn L oil
CERTIFIED LABORATORY Peg&,9A?,-R-,4,wR)yTrP1Lab #-31�
Lab #
LIMIT VIOLATIONS? YES ❑ NO
Part A Wastewater Monitoring Requirements
SAMPLE COLLECTION YEAR ZC, 11/
SAMPLE QUARTER []Jul -Sept []Oct -Dec an -March
COUNTY f='ods
PHONE NO {33& -7Z S- 4-/d1
ADD TO LISTSERVE7 RYES 2<0 EMAIL
DISCHARGING TO CLASS []SA ❑HQW ❑PNA ❑Trout [aOtherC/w_-.5, C
OPTIONAL INFO
0)
❑April -June
Outfall No
Date Sample
1
Collected
(mm/dd/yr)
Type of Wastewater
(VE, RM, MD)'
pH
(standard)
Total Suspended
Solids
(mg/L)
Settleable
Solids
(mL/L)
TPH using
method 1664A
SGT-NEM6
(mg/L)
Discharge
Duration
(minutes)
Total Flow
(gallons/day)'
-
-
6-934
3035
53-
ts e r
d O
Apt
U 1 1-U i't
ri:K
TRAI EIIE
WOIBOG
1 if wastewater systems have not discharged in this quarter — report No Flow" or ` No Discharge" here Please make sure to mark the sample quarter above
z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE) Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type if the waste -stream is commingled
3 if an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RD staff
notifies you to continue monitoring
pH limits are 6 9 5 U for wastewater discharges to freshwaters and 6 8 8 5 S U for discharges to saltwaters
5 T55 limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
Permit Date 7/1/2010-06/30/2015 Last Revised 07/13/11
Page 1 of 2

490
''Proc water discharges shall only be monitored for TPH when commingle ormwater discharges from VMA areas TPH does not have a limit foi•later,
but uf+stead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
' Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 70.10 flow and report this information to DWQ If the permittee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case by -case bans
MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY INCLUDING ALL "NO FLOW" "NO DISCHARGE" WITHIN 30 DAYS OF RECEIPT OF SAMPLE OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
(Signaturi of Permittee) f (D (e}
Permit Date 7/1/2010-06/30/2015 Last Revised 07/13/11
Page 2 of 2

4 Ong
PROCESS WASTEWATER — Quarterly Discharge Monitoring Report ,o Copy state
Copy -slate
GENERAL PERMIT NO NCG140000 0 Copy - Plant
0 Copy File
CERTIFICATE OF COVERAGE NO NCG14 0 419 SAMPLE COLLECTION YEAR 2015
FACILITY NAME Chandler Concrete/Piedmont Inc -Plant 118 SAMPLE QUARTER ®Jul -Sept ❑Oct -Dec []Jan -March ❑April -June
PERSON COLLECTING SAMPLES? C
CERTIFIED LABORATORY Pace Analytical Lab #633ECE�U�D
LIMIT VIOLATIONS? YES ❑ NO ® MAR
CENTRAL FILES
DWR SECTION
Part A Wastewater Momtonna Reauirernents
COUNTY Forsyth
PHONE NO (336) 725 - 9401
ADD TO LISTSERVE? [-]YES ®NO EMAIL
DISCHARGING TO CLASS [—]SA [_]HQW ❑PNA ❑Trout ®Other WS-V
NSW
OPTIONAL INFO
Outfall No
Date Sample
1
Collected
(mm/dd/yr)
Type of Wastewater
Z
(VF, RM, MD}
pH
(standard]
Total Suspended
Solids
(mg/I.) )
Settleable
Solids
(mL/L)
TPH usingDischarge
method 1664A
6
SG
/I.)
Duration
(minutes)
Total Flow
7
(gallons/day}
-
-
6-93 4
303 5
53
(15 )6
-
-
1
NO FLOW
VE RM MD
-
-
-
-
-
-
No Qualifying Discharge this Period -
1 If wastewater systems have not discharged in this quarter — report "No Flow" or "No Discharge" here Please make sure to mark the sample quarter above
Z Report the abbreviation for the type of Authorized Wastewater Discharges here Vehicle and Equipment Cleaning (VE), Raw Material Stockpiles (RM), Mixing Drum
Cleanout (MD) Report more than one type of the waste stream is commingled
3If an effluent limit is exceeded twice in a row, the permittee is required to institute monthly monitoring for that parameter for six months, unless DWQ RO staff
notifies you to continue monitoring
A pH limits are 6-9 S U for wastewater discharges to freshwaters, and 6 8 8 5 S U for discharges to saltwaters
5 TSS limits are 20 mg/L for wastewater discharges to HQW waters, 10 mg/L for Trout and PNA waters, and 30 mg/L for all other water classifications
6 Process wastewater discharges shall only be monitored for TPH when commingled with stormwater discharges from VMA areas TPH does not have a limit for wastewater,
but instead is subject to benchmarks and provisions of Part IV, Section A, including the Tiered Response Action
7 Flow rate can be measured continuously or calculated Flow limits for wastewater discharges to HQW waters shall beset to 50% of the Summer 7Q10 Flow as per 15A
NCAC 02B 0224 Permittees who discharge wastewater to HQW waters shall obtain a Summer 7Q10 flow and report this information to DWQ if the permatee cannot
obtain a Summer 7Q10 flow for the receiving waters at the discharge location, the permittee shall notify DWQ, and the DWQ Regional Office may require an annual flow
report on a case by case basis
Permit Date 7/1/2011 6/30/2016 Last Revised 07/27/14
Page 1 of 2

MAIL ORIGINAL AND ONE COPY OF THIS ANNUAL SUMMARY INCLUDING ALL "NO FLOW", "NO DISCHARGE") WITHIN 30 DAYS OF RECEIPT OF SAMPLE (OR
AT END OF MONITORING PERIOD IN CASE OF "NO FLOW") TO
Division of Water Quality
Attn DWQ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
YOU MUST SIGN THIS CERTIFICATION FOR ANY INFORMATION REPORTED
"I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system, or
those persons directly resp able for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and
complete I am aware tN�7iere are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing
violations "
(Signature of Permittee)
Permit Date 7/1/2011-6/30/2016
/v/a
(Date)
Last Revised 07/27/14
Page 2 of 2

("O�
KL E/NFEL OEf?
Bright People Right Sofutiorrs
October 3, 2011
RAL11L110
Mr Tom Long
VCNA Prestige Ready Mix
2865 Lowery Road
Winston-Salem, North Carolina 27101
4 20f1
MiENR WATER QUALITY
SANDsroRMIVA75H
Reference Notice of Intent for Coverage Under NPDES Permit 140000
VCNA Prestige Ready Mix -Lowery Road
Winston-Salem, North Carolina
Kleinfelder Protect No 117397
Dear Mr Long
Kleinfelder has completed the storm water design for the above referenced protect This
report presents our summary of the design for the stormwater and wastewater
treatment for the site
SITE DESCRIPTION
The existing property is located along Lowery Road in Winston-Salem and is 4 079
acres In size with a drainage area to the detention basin of 3 15 acres The parcel is
currently zoned General Industrial (GI) and currently has an active ready mix concrete
plant producing concrete Water from the site currently flows to the west to an existing
detention basin where it discharges process wastewater and eventually is captured in
an Unnamed Tributary to Salem Creek
The wastewater is generated from stormwater runoff and through the production of the
ready mix concrete that is delivered to various sites The wastewater generated by the
production of concrete comes from the washout of each truck after delivery of the
concrete material The truck washout area is handled utilizing a closed water recycle
system that allows the settling of the cement particles in three settling bays In the event
that the system fads and overflows, runoff will be captured in a vegetated swale and
diverted to the design detention basin
1 In addition to treating the wastewater from the site, the detention basin has been
designed to control stormwater runoff as a Best Management Practice (BMP)
Permanent Rock Check Dams and vegetated swales are additional BMPs that are
bung supplied onsite
1 3500 Gateway Centre Blvd Suite 200 Morrisville NC 27560 p 1919 755 5011 f 1919 755 1414

STORMWATER POLLUTIN PREVENTION PLAN (SWPPP)
1 A Stormwater Pollution Prevention Plan has been completed and will be attached for
your review
DETENTION BASIN DESIGN
The detention basin has been designed to meet and comply with North Carolina
Division of Water Quality (DWQ) The basin has been designed for the worst case
scenario of the existing three bay recycle system failing with the basin at full capacity
during a 10 year storm event The basin has been designed to handle the run off of a
25 year storm however it has been designed to meet the effluent standards due to the
10 year storm event The discharge requirements for the effluent being discharged from
the basin during a 10 year design event
6-9 SU for pH
30 mg/1 for Total Suspended Solids (TSS)
1 5 mg/1 for Settable Solids (SS)
The pH will be automatically controlled through a skid -mounted CO2 dosing system
The Fortrans, Inc Model 5000 pH Control System (or approved equal) will be supplied
with power to the unit through a connection to the building and maintain a discharge pH
of 7 50 Refer to Appendix A for design details
ASSUMPTIONS AND CALCULATIONS
Settling Velocity Calculation
The particle settling velocity was calculated using Stoke's Law for various size particles
1 using the equation shown below
v=91L1:222�
18µ
The variables and constants for the equation were as followed
p1 = density of cement (200 Ib/ft3*)
P2 = density of water (62 4 Iblft3)
g = acceleration of gravity (32 2 ftlsec2}
d = diameter of cement particle (ft)
p = viscosity of water (5 981 E-04 Ib/ft-sec)
v = particle settling velocity (ftlsec)
1 Run -Off Calculation
The run-off calculations were prepared with several assumptions for the production of the
concrete material and for design storm event There are two forms of run-off that contribute
to the process wastewater for the site, run-off from the production of concrete and run-off
1173971 RAL11L110 Page 2 October3, 2011
Copyright 2011 Kleinfelder

rot'P'12
Y\� � 0 30
due to the design storm The run-off calculation for the 10 year design storm was calculated
using the rational method, as shown in the equation below The Intensity used for the 10
year, 10 minute storm event was 5 50 inlhr with a conservative run-off coefficient of 0 90
since most of the 3 15 acre drainage area empties to the treatment basin are Impervious
areas It was calculated that 15 57 cfs with a volume of 9,341 cf would run-off from the site
as shown on page 2 of Appendix B
Q=CIA
Q = stormwater discharge to drainage basin (cfs)
C = rational method coefficient (unitless)
I = 10 year, 10 minute rainfall Intensity (In/hr)
A = drainage area for the treatment basin (acres)
The run-off for the non -ram condition had several assumptions that were made to produce
the run-off for the process wastewater flow It was calculated using these assumptions that
0 0046 cfs will run-off assuming a 12-hr work day and 201 cf per workday would be
generated by the site These assumptions are shown below
Plant Production=
70
cylhr
Average Work Day=
12
hr
Total Plant Production per Day=
840
cylday
Anticipated Wash Water per Truck=
100
gal
Capacity of Single Conrete Truck=
10
cy
Concrete loads between Truck Wash=
3
loads
Anticipated Total Truck Washes=
15
washes
Anticipated Total Truck Water Water=
1,500
gal
Anticipated Total Wash Water per Day--
1 500
gal
The design volume for the basin that is provided is approximately 15,123 cf (obtained from
HydroFlow Hydrographs) with a required volume of approximately 9,341 cf using a plug flow
analysis This assumption is taking that Q,,=Qout under a 10-yr storm condition with the plant
in production The design detention time for the basin is 1 59 days or 38 04 hours
Particle Settling Depth Calculations
Using the above assumptions for the treatment basin, it was determined that the depth of
flow over the discharge weir to be 1 031 feet for the combined flow from the design event
and the plant in production with a 12 hour work day The equation used for this calculation
is shown below The cntical settling velocity for the particle capture was calculated to be
7 52717E-O6 ft/sec It was determined that all the particles of a certain size that have a
settling velocity less than the stated velocity will be captured below the discharge weir
Therefore a cement particle must settle 1 031 feet in 1 59 days to be captured
1173971 RAL11 L110 Page 3 October 3 2011
Copyright 2011 Kleinfelder

)'J o s Pu fe v""'S
H= Q Q = Flow over the Weir (cfs)
CwL213 Cw = Weir Coefficient (unitless)
L = Weir Length (feet)
H = Hydraulic Head over the Weir (feet)
Screening Analysis of Portland Cement Particle Size
Using the information provided by a 2004 Study of Measurement of Particle Size
Distribution in Portland Cement (which has been provided in the appendices), the
percentage of particles that would be captured by the weir before discharging from the
treatment basin was calculated It was determined that approximately 58 85% of the
cementous particles that are 1 0 microns or smaller would be captured using the standard
grain size distribution provided in the 2004 NIST Study Under this analysis, it was assumed
that the treatment basin was at capacity of waste water prior to the storm event being
introduced
Total Suspended Solids in Effluent Wastewater
Through the above anaylsis and the assumptions below, the estimated amount of Total
Suspended Solids (TSS) in the effluent wastewater was determined for the treatment basin
It was determined to be approximately 26 8mg/I which is less than the maximum of 30 0 mg/l
threshold During this calculation, a conservative approach was taken assuming that only
50% of the particles in the effluent wastewater were screened prior to being discharged in
the weir outlet
Concrete loads between Truck Wash=
3
loads
Estimated Waste per Truck=
390
lbs
Estimated Waste per Truck per load=
1300
lbslcy
Total Plant Production per Day=
840
cylday
Average Weight of Concrete per CY=
4 050
1b
% Weight of Cementous Material in Concrete
120
%
Estimated Weight of Cement per CY of Concrete=
486
lb
Estimated Total Waste Concrete per CY Concrete=
1300
lbslcy
Estimated Waste Cement per CY of Concrete=
1 56
lb
Estimated Daily Cement in Wash Water=
13104
Ibs
1
Settleable Solids (SS) in Effluent WasteWater
A sample will be taken from discharge of the treatment basin to determine the amount of
Settleable Solids (SS) still present in the effluent wastewater Any effluent wastewater that
1173971 RAL111-110 Page 4 October 2011
Copyright 2011 Kleinfeider

�fo �P��
�
is leaving the treatment basin was determined to not have any particles greater than 1
micron as shown in the above calculations
The determination of a Settleable Solid is the solids that will settle to the bottom of a cone
container during a 60 minute penod Since no particles greater than 1 micron are passing
through the weir outlet and the time required for a 1 micron particle is greater than 5 hours,
it can be inferred that the concentration of Settleable Solids in the effluent waste water will
be 0 mlll
CLOSURE
We appreciate the opportunity to provide our Engineering services and look forward to
working on additional Prestige Concrete Projects If you have any questions or need
additional information, please contact the undersigned
Respectfully submitted,
KLEINFELDER SOUTHEAST, INC
Joshua Crumpler, PE
Project Engineer
lcrumpler@kleinfelder com
Attachments Fortrans, Inc Model 5000 pH Control System
Total Suspended Solids (TSS) Calculations
Measurement of Particle Size Distribution in Portland Cement
jacljbc
J %Stt-5ENVW45MPm1edW111117307 Prestige ReMy Mix Env Saiv aSTask 1 Win= Salam Lary St Plant%Subtask 1 t Grtl Cesgn Ssmica Pmtect Componems4SlonnvraleARAL110 di c
1173971 RAL111-110 Page 5 October3 2011
Copyright 2011 Kleinfelder

APPENDIX A
Fortrans, Inc Model 5000 pH Control System
�q I10-

INDUSTRIAL PH CONTROL SYSTEMS
ALL STANDARD FORTRANS PH CONTROL SYSTEMS
INCLUDE
(D� Fortrans patent pending carbon dioxide diffusion and
injection system that quickly and easily lowers pH of
process water All of the Fortrans pH control systems
are driven by a programmable logic controller with a
continuous digital display of the pH of the water being
treated The system operates automatically to lower and
the continuously maintain the desired pH Target pH
range is adjustable A sampling cell and pH probe that
continuously monitor process water pH and reports to
the PLC for automatic control of chemical feed
Stainless steel continuous duty rated submersible pump
with thermal overload protection and a chemical
resistant Float switch System can also be specified with
an integral chemical resistant centrifugal pump with
equal Flow specifications Pumps are rated for 70,000
GPD at nominal 15' head pressure
35), Electronic Flow Meter showing Flow in gallons per
' minute to Indicate that the system is operating within a
normal flow rate or signal the need for maintenance
cleaning of the pump Inlet or system hoses
'4, Two 25' sections of 2" heavy duty suction and discharge
hose equipped with cam lock quick connect fittings for
easy setup
'(D Custom made high quality swiveling pump boom with
manual winch Standard boom Is 2' high with a 30"
boom reach Other sizes are available
O6' Custom made carbon dioxide regulator that provides
high flow at low pressure settings (20 to 30 PSI) for fast
response to high ph and high flow situations Connec
tion hose for regulator and system solenoid valve
Factory Installed 3800 joule surge suppressor to protect
system electronics
fsii Red Warning Light that alerts operator if pH exceeds
target on the high side or the low side Alarm provides
Visual signal that Cat supply may be exhausted and
must be refilled
®t A system enclosure that is best suited for your facility's
budget or needs
PROCESS WATER MANAGEMENT FOR
pH Control Systems
FORTRANS MODEL 5000B
FORTRANS PH CONTROL SYSTEMS BENEFITS FOR CONCRETE
MANUFACTURING
- Low Operating Cost System That Lowers the pH and Total Solids of
Process Water and Storm Water to Allow Discharge per EPA
Regulations
- Virtually Eliminates the Cost of Storing or Disposal of Excess
Process Water
- Useful in Meeting Water Conservation and Water Recycling Goals
in Green" Projects
- Eliminate Hazardous Acids Used for PH Control
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-Treated water meets pH and total suspended solids limits for
discharge or return to municipal waste water systems
-SATISFACTION GUARANTEED
COMPACT METAL ENCLOSURE
The Fonrans System is installed in a heavy gauge all uluminum enclosure with a sloped sap
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Shipping Weight 290 Lbs Class 55 Freigh
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Fortrans assists you to comply with federal and local
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FORTRANS pH CONTROL SYSTEMS - MODEL 5000S, 5000SK & 50008
115v Stainless Steel
Submersible Pump
Overhead view
i SUtli`tt-sm�
BaG
wall
RUurn
i hoe
water
wa
flow
a
�9(l Return
I
T Inc
L
i
] ]12 piPC
elainP(s)
115v Stainless Steel
Submersible Pump
Return line detail
Included
25 x 1 112 SnettOn HOSe
Hose Barb
Hose Clamp
20 Powcr Cord
20 1 loat Switch
Hang pump in
brim with 114
steel cable or a
pump boom
Position pump
above any ~Judge
Jaye, present in
the basin
Water flow from return must he parallel to surface of water"
See overhead view for corri.ct pipe
placemuit in basin This part sit
the return lim is rotated 90 over
the basin wall
Return line is installed on interior
side of scaling basin Fasten with
l 112 pipe clamps
r
1 112 cam hick
quick connect
G Basin wall
x 'X-
C >�xjC7cWatrrflaw�� O� �C�—x
Return line outlet
ipproximately 12 from
the. boltom of the basin
5 X x X I i Return Ie outlet is
constructed with
1112 schedule 8(1 PVC
Fortrans-
FORTRANS INC 7400 Siemens Rd Suite B PO Box 40 Wendeil N C 27591
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Operation overview Model 5000S. Model 5000B and 5000 SK pH Control
Systems@
Gopyncghted information
The Model 5000 series pH Control systems use a proprietary carbon dioxide gas
diffusion and injection process to lower the pH of process water and or storm
water at ready mix concrete plants, and other types of concrete manufacturing
operations
The programmable logic controller in the system can be set to lower the pH to
almost any end point The controller is pre-set to maintain a pH of 7 5 in the
detention basin
■ The system is installed on a 10'x 10' concrete pad adjacent to the pit or basin
with the cleanest water The system circulates the water in the basin with a
submersible pump in a closed loop piping system and continually monitors the
pH level When the pH rises to 8 25, the controller will actuate a solenoid valve
and begin to diffuse and inject carbon gas Once the water is at a pH of 7 5, the
valve shuts off and the water lust circulates until the pH rises to 8 25 again Thus
you will always have a certain amount of pH adjusted water on the property
High pH process water contains a high amount of suspended and dissolved
solids, when you lower the pH these dissolved solids will become insoluble and
drop out of the water
Typically, the "Total Suspended Solids" reading will be from 14 to 17 after pH
adjustment The EPA permits discharge of treated process water when the pH is
9 00 or lower and the TSS (Total Suspended Solids) is under 30
eAs part of a water recycling program, the treated water may be used to batch
concrete, for dust control, truck washing and irrigation of lightweight aggregate or
release from the property according to the storm water permit for the plant The
Btreated water may also be returned to the municipal waste water system
pH adjusted water does not scale up pumps, valves and fittings so maintenance
1 costs are lower compared to using high pH process water to batch concrete
Carbon Dioxide costs about 29 lb delivered If you treat 30,000 gallons per day,
you will use about 100 Ibs to 200 Ibs per week or $30 00 to $60 00 This figure
may vary depending on the actual pH and total alkalinity of the process water
e The systems include everything needed to operate except the CO2 supply, CO2
regulator, hose from regulator to our solenoid valve and 115V- 20 A electrical
connection A small amount of schedule 80 PVC piping and fittings to construct
the return outlet will also be required

I
Fortrans does not recommend "batch treating" of process water Once the
system is installed, run continually during plant operating hours The system will
not use more CO2 than of batch treating and scaling in piping and lines will be
greatly reduced
All of the Model 5000S 5000B and 5000SK come with p
complete operation
p
manuals that contain detailed maintenance information, complete installation
tinstructions and drawings that show how to set up the pump and install the outlet
piping
1 Competitive Information
The Model 5000S pH Control Systems cost approximately 60 to 70% less to
operate than acid based neutralization systems The cost savings is based on
using less pounds of CO2 than sulfuric acid or hydrochloric acid Our systems
Cost about 50% less than systems using granular sodium bisulfate and are much
1 more efficient at lowering total suspended solids
Also, because our system does not use corrosives, all of our components last
longer No hazardous chemical permits are required
All of our systems are guaranteed to perform to our customer's satisfaction

APPENDIX B
Base Calculations
�o
f

KLEINFELDER INC
Subject Notice of Intent Date 9/29/201 1
Set Up By JAC
Work Settleable Solids Removal Computed By JAC
Checked By JBC
Project Prestige Concrete Lowery Road JOB NO 117397 Page No 1 OF��
Settleable Solids Removal
Settting Velocity Calculation
v=q(p, P,)d'
lap
Acceleration of Gravity
g (ft/sect)= 322
Average Diameter of Cement Particle
d (if)= 4 92126E 05
Density of Cement
p, (lb/ft3(= 200
Density of Water
pZ (lb/ft3(= 624
Viscosity of Water
p (Ib/ft sect= 00005981
Particle Settling velocity
v (11/sec)= 9 96737E 04
Notes
1 00 micron = 3 28084E-06 feet
Average Diameter of Cement Particle
15 00 microns = 4 92126E 05 feet
Particle Settling Depths
Total Plant Production per Day=
840 cy/doy
Wash Water Production=
508 ft3/work day
Average Work Day=
12 hr
Average Flaw Rate (QPR0ouc7,0N)=
0 005 cis
Flow Rate for Design Storm (Q 10)=
15 568 cis
Total Flow Rate (QcoMUND)'
IS 572 cis
Depth of Flow for Discharge Weir
H= Q Q = Flow over the Weir (cis)
CIAL21J C , = Werr Coefficient (undless)
L = weir Length (feet)
H = Hydraulic Head over the weir (feel(
Production Only Depth of Flow
QP%aDIR: UN '
0 00 Cf5
L =
11 30 feel
CW =
3 00 undless
HrRooucnoN =
0 000 feel
Total Combined Depth of
Flow
GCOMBINED=
15 57 cfs
L =
11 30 feel
Cw =
3 00 undless
Hccn,,+w=
1 031 feet
Design Flow Critical Velocrtvfor
Particle Capture
Particle Flow Depth =
1 031 feet
Particle Flow Duration =
159 days
Particle Velocity =
7 52717E 06 ft/sec
L'-Length of Weir for fop of NCDOT Standard 840 18 Drop Inlet

Subject
Work
Project
KLEINFELDER INC
Notice of Intent
Settleable Solids Removal
Prestige Concrete Lowery Road JOB NO 117397
Run -Off Calculations
Run Off f2t the 10 yr Design Storm
Q=CIA
C (Discharge Coefficenl}= 0 90 unitless
110 (10 yr Rainfall Intensity)= 5 50 in/hr
A (Drainage Area)= 3 15 acres
Qrfl= 15 57 cfs
Total Run Off Volume(V,p)= 9 341 cf
Run Off for Non Rain Condition
Assumptions
Plant Production=
Average Work Day=
Total Plant Production per Day=
Anticipated Wash Water per Truck -
Capacity of Single Conrete Truck=
Concrete loads between Truck Wash=
Anticipated Total Truck Washes=
Anticipated Total Truck Water Water=
Anticipated Total Wash Water per Day -
Anticipated Total Wash Water per Day (VPRooucnoN)=
Wash Water Production=
Average Work Day=
Average Flow Rate (QP1000 TION)=
Dolly Design Run Off Combined
Total Flow Rate (QiorAt=Qio+QPsooucnoN)=
Total Design Volume (V10t,u=VPR000CtK N+Via)=
Design Volume of Wastewater Treatment Basin
Basin Volume Provided**= 15 123 cf
Basin Volume Required= 9 541 cf
**Obtained from Hydretlow Hydrogrc is
Available Settling Time of Wastewater Treatment Basin
Settling Time=(Volume Provided/Volume Requi(ed)
Avoi{able Time= 15 123 cf/day 1 59 days
to Settle 9 541 cf/day 38 04 hrs
70 cy/hr
12 hr
840 cy/day
100 gal
1.0 cy
3 loads
15 washes
1 500 gal
1500 gal
201 ff3
201 W/work day
12 hr
00046 cfs
15 57 cfs
9 541 cf
or 113 120 gal
or 71 358 gal
Date
9/29/2011
Set Up By
JAC
Computed By
JAC
Checked By
JBC
Page No
2 OF 3

Subject
Work
Protect
KLEINFELDER INC
Notice of Intent
Settleable Schds Removal
Prestige Concrete Lowery Road JOB NO 117397
Total Suspended Solids (TSS) Calculations
Screenlrg Anaiysls oT_Particle 51zes of Portland Cement
Date
9/29/2011
Set Up By
JAC
Computed By
JAC
Checked By
JBC
Page No
3 OF 3
Diameter
(miclonsl
Size
Distribution
%
Diernetei
Ileetj
Setiling Velocity
I11/secl
Percent
Captured by
Weir
To Outer
1
4 7
47
3 28084E 06
4 42994E 06
5585
Yes
1 5
26
73
4 92126E 06
9 96737E 06
100 00 %
No
2
48
12 1
6 56168E 06
1 77198E 05
10000 7
No
3
1 56
17 7
9 84252E 06
3 98695E 05
100 00 %
—
No
4
46
223
1 31234E-05
7 08791 E-05
100 0D 7
No
6
76
29 9
1 9685E-05
159478E-04
100 0D 7
No
8
60
359
2624671
283516E-04
100DD %
No
12
105
464
3 93701 E 05
6 37912E-04
10000 %
No
16
82
546
5 249341
1 13407E 03
10000 %
No
ir—ii-i-ii Fiuviucu uy �—i aiuuy VIi IIIUVIiVn III rVnlVnu i_U"i Vnl
Weight of Cement Passing to outlel Weir
Assumptions
Concrete bads between Truck wash=
3 loads
Estimated Waste per Truck=
390 Ibs
Estimated Waste per Truck per load=
13 00 Ibslcy
Total Plant Production per Day=
840 Cy/day
Average Weight of Concrete per CY=
4 050 lb
% Weight of Cemenfous material In Concrete
120 %
Estimated Weight of Cement per CY of Concrete=
466 lb
Estimated Total Waste Concrete per CY Concrete=
13 00 Ibs/cy
Estimated Waste Cement per CY of Concrete=
1 56 lb
Estimated Daily Cement in Wash Water=
1310 4 Ibs
Silo of Parilcles
% of Particles
Weight of Particles
% Passing to
Weight Passing
(micronsl
Screened
(lbs)
Outlet Weir i
Outlet Weir
Ibs
1
50 00%
61 6
41 15
2534
Moss of Suspended Cement in EFOuent= 25 34 !bs
Volume of Basin = 113 120 gal
Effluent TSS Concentration (Estimated) = 2 24111
Design for TSS During 10 yr Storm= 26 8 ni
Maximum Allowable TSS (Dii 30 0 1
1 mg/I= 8 3454E O6 Its/gal
Weight of Particles = (Estimated Cement in Wash Water x Size Disinbution)/IDO
Percent Pci to Outlet Weir - 100 Percent Captured by Weir
Weight Passing to Outiet Weir - (Percent Passing to Outlet Weir x Weight of Parnclesl/100
Times for Settleable Solids In Effluent Waste Water
Settling
Time to Settle
Size of Particles
(microns)
Velocity
Time to Settle 6
Inches (hours)
I Inch
ft/sec
hours
1
4 429941
31 352
5 225
1 5
9 96737E 06
13 934
2 322
2
1 77198E-05
7 83B
1 306
3
3 986951
3 484
0 581
4
7 08791 E-05
1 960
1 0 327

c-3
APPENDIX C
Measurement of Particle Size Distribution in Portland Cement

Measurement of Particle Size Distribution in Portland Cement
Powder: Analysis of ASTM Round Robin Studies
by
Chiara F Ferraris
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899 USA
Vincent Hackley
Materials Science and Engineering Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899 USA
and
Ana Ivelisse Aviles
Information Technology Laboratory
National Institute of Standards and 'I ethnology
Gaithersburg, MD 20899 USA
Reprinted from Cement, Concrete and Aggregates, Vol 26, No 2, 2004
NOTE This paper is a contribution of the National Institute of Standards and
Technology and is not subject to copyright
NLST
National tnstityte of Standards and Technology
Technology Administration U S Deportment of Commerce

Cement Cuncrcre and&�,ic�eats Dec 2004 Vol 26 No 2
Paper ID CCA 11920
Available, online, It www astni org
Chrala 1, Feitam,' Vincent A Hackley,2 and Ana Ivelme Aviles'
Measurement of Particle Size Distribution in
Portland Cement Powder Analysis of ASTM
Round Robin Studies
ABSTRAL t A dtStrLbultnn of particle dies or particle size distribution (PSD) is a fund tinent it characteristic of cenient powder Accurate PSD,,
arc, rLqutn d In computational Lftons to model the, hydr anon proLLSS ind it is an import ins practical issue for the concnt industry Presently the
only wail iblL stand ird method for measuring the PSI) of cement namely ASTM Cl 15 is limners in Scope, with a lower size de1LLII011 limit of
7 5 tun SmLL there art, no standard procedures that adequately cover ihL broad particle size rinf,L assoudtcd with port) and LLment powder the
impforn.ntation of different InLasurement tcuhniquu vane+ widely within the industry Two AS 1 M sponsored round robin tests wcrL performed
to (I) a%ei nam the techniques and methods currently used in the LLmLnt industry and (2) dLVLltrp and refine a standard method or InLihods The
rusutts have been incorporated into a best pracocL mt.thod based on thL tLLhmque of laser diffraction the aim of the current paper Is to sumniarvc
thL findinf,s based on thL data l,Lnerated during thL round robins and to summarvL the various approaches available to measure the PSD of LLmLnt
A summary of the statistical analysis of thL tut results is descnbcd
KI YWORllS cement p IrtiL1L WL distnbuuon PSD round robin Ides dtftraction rLfLTLIILL material
Introduction
Accurate measurement of the particle sve distribution (PSD) of
a cement powder is both an Important practical issue for the cement
industry Ind a key lirmUng I tutor in on going computation it el
forts to sunul tie the microstrULture and predict the performance of
cement based materials (Bent/ et al 1999a 1999b Garbocn et al
2003) Ilence the PSD lsessentialfor the Complete characterization
Of a cement powder and is closely linked to cement performance
Presently the only relevant standard method Is AS'I M CI 15 96
a lurbidliuLtric method for determining fineness (Standard Test
Method lot F ineness of 11ortl Ind Cement by the Turbidimeter
ASTM CI 15) This method Is limited in Scope however with a
lower sve detection limit of 7 5 }tm Because ihi re ire no st in
dard procedures that adequ itely cover the broad particle size range
assoLtatLd with port ]and ce inent powder the implementation of dif
ferenl measurement techniques v Imes widely within the industry
Cement Is a problematic in iterial with respect to the applic I
tion of PSD methods First the ,tie distribution itself is extremely
broad typically spanning two or three decades from the subim
cromeier range to 100 µin In general suing techniques work best
over a limited sire range I he optimum range for a p irticular tech
nique varies according to a number of faLtors including detector
sensitwily underlying principle of measurement Ind issumptions
ManuSenpt received April 15 2003 accepted for publication May I 20(A
pub] t shed Ik ceniber 2004
1 Phystust National Institute of Standards and Technology 100 Bureau Dr
Gaithersburg MD
2 RLSLarl.h Chemist National Institute of Standards and [cchnoloi,y 100
Bureau Dr Gaithersburg MD
3 Malhein ILA Statistician N itional Insututu of Standards and Technology
100 Bureau Dr Ganhersburs& MD
inherent in the data analysis routine, Secondly cement particles
are highly agglomerated in the dry stale and therefore, must be
dispersed in order to differentiate between weakly bound igglom
erates and prim try units Standard protoLols for dispersing Lement
p irticles before Inalysis-are nomxiStLnt i he degree of dispersion
achieved in city terosol methods will likely vary depending on par
tic.le Sire the geometry of the dispusmg device the residence time
its the sensing zone and the applied shear force Similarly wet dis
persion methods are subject to variations in surface chemistry of the
powders sohds concentration the n cure of the medium ind the
/mount of ineLhanical energy expended to break up agglonter ties
In Iddition thL most dispersive medium for cement namely water
L mnot be used due to the reactive nature o1 the solid phase Ditiper
sion mtroduces a potentially large source of variation it the sample
preparation stage Finally cement particles are inhontogeneous in
Lomposition and ollen irregular (non spherical) in morphology
Applicable cominerci it teLhniques ire designed speUhL Illy for
or work best with homogeneous spheres lypILally III effective
spheric it parttcic diameter is reported the degree to which ureg
ularity affects the results will vary by teLhmque and is generally
not well understood or properly accounted for in most methods
(Bowen 2002 B irth and Sun 1985 Beddow and Meloy 1990)
The issue of how to determine if a chosen method of an ilysis
yields the lore distribution must ilso be addressed Within this
context dehning I true PSD is in integral part of the method
development and v didation process Currently no m IlLri Il arii
I ict (I e reference material) or universally accepted measurement
method exists for cement powder PSD determination I lid refore a
PSD reference material for cement should be established but also
a standardized method for dispersing Ind analyzing test samples
trust be coupled to this reference
To address these issues two round robin tests sponsoted by
ASTM Task Group CO1 25 01, were Londucled The mitt I] round
Copyright 0 2004 by ASTM Intcmauonal 100 Barr Harbor Drive PO Box C700 West Conshohocken PA 19428 2959
Copyright by ASTM lot I (all rights reserved.)
Reproduction authorvLd per License Agreement with CI IIARA I I 1 RRARIS (NIS I B1 RI ) Tue Nov 30 11 31 29 EST 2004

2 CEMENT CONCRETE AND AGGREGATES
robin involved 21 partiup mis and was nonspeuhe with rLgards to
methodology (I a parliupants used their in house methods and no
protmols or parameters were specihLd) Four portland Lentents pro
vided by the Cement and Concrete Reference Laboratory (CCRL)
were mLludcd in the tLst 131 132 135 and 136 (nunikrs were
assigned by CCRL) The compositions and characteristics of these
cements mt.asured is part of the CCRL prohuency program are
provided elsewhere (I'erraris et A 2002a) The cement powder
SI andard reference m ItCI tal (SRM) I 14p was also indtidt d in this
test SRM l l4p is routinely used to calibrate Blaine as well as
other surface area measurements 7 he information requested from
the partlLipants included only the measurement technique and the
Lumulative PSD so I (let ailed underst inding of the various prose
(lures used was riot possible The principal purpose of this initial
round robin was to assess the ovLrdll variability in PSI) measure
rnenis across the cement industry A total of four techniques were
reported by this group ofpartILapants. laserdiffraCtion(LAS) elec
trical /one sensing (EZS) X raygravitationtlsedimeniaiion(XRS)
and scanning electron microscopy (SEM) Laser diffraction using
cuher wet or dry dispersion methods was by I it the most f requenlly
reported technique the high degree of vain ability in the data re
ported from the first round robin indicated the necessity for further
research and testing
l he second round robin Lxpanded to 41 p anticipants and included
both specrlled and nonspecihed inwsurement methodologies Two
portland cements provided by CCRL were Included in the tests
143 and 144 The charauenstiLs of these cements as me tsured in
thL CCRL piohctency program ire given elsewhere [Ferr tris et al
2002b] SRM l l4p was again included with the specific intent of
establishing a consensus reference PSD Est ibhshing a h tee analyt
ILa1 PSD for SRM 1 14p was considered to be neither pr tctaLal nor
fundament ally sound given our presenl limited underst trading of
LLment p article dispersion and the limitations of available analytic
methods In the second test only three techniques were reported
(LAS EZS and SEM) with 93% of p irttup ants using LAS The
issue of how to best disperse cement powder for PSD analysts was
addressed by conducting additional studies at the ]stational Institute
of Standards and Technology (NISI) which were then imLorporated
into the design of the SCLund round robin
rise purpose of this paper is [hen to summ trite itndings based
on the dat t generated during the round robins and to summarize
the vartous approaches available to measure the PSD of portland
Lement A summary of the statistical analysis of the test results is
desLribed I he analysts of reported data is conducted in two parts In
the lirst pan an attempt IS made to establish a consensus reference
1'SD based on SRM 114p This is followed by an examination
of the parameters and methodology used by the partiupaltis In
order to mill tie discussion on developing a st indard lest method
for cement PSD to be submitted for ASTM consideration The
complete set of raw d it I collected during the round robin tests and
IhL aLLomp inytng St IIIStiLal uialyseS ire tv ail able in two separate
reports (I errans et A 2002a 2(X)2b)
Description of leehniqut O
Although a wide variLty of techniques are available for the de
termin anon of PSD in powders only a relative few appear to be
Conirntn ial LqulprnLnl InstwTmnts and I wi rials mLnaomd in this rc
pun arc IdLnndLd to fostcr undLrstandinb Such idenultcanon doLs not imply
rLcommendauon or endorsLment by the National Insutuic of Standards and
TLchnology (NIbT) nor does it Imply that the mato-rials or egwpmLni identified
arc nLM.Sdsily the beet avaddhk. for thL, purpose
used currently within the cemLnl industry 1 he chotct, of lechmqut,
I% prob ably b i%ed on both cap ability (relative, to them venal prop
Cores of cement) and speed and convenience of analysis Based
on the results of ihL two ASTM round robin studies the currently
ut►]tzed IneasuremLnt leLhniquLs are llsw dilfrawon electirtal
zone sensing (Coulter pnnLlple) sedinient titon (X ray sensing)
scanning electron microscopy (unaging)
Sieving though known to be used by the cement industry in
the pasl was not rcporled as I technique of choice by any of the
round robin paritctp tuts The technique most often rcporled was
laser diffraction In fact only a handful of participants reported
using; techniques other than laser dif)raction (less than 10%,) In
this seuwn we provide a synopsis for each techniquL as it rel uLS
to cement analysis Greater detail is provided for laser diffraL
tion since it is the most widely used method for cement powder
sizing
L asei Diffraction (LAS)
In the I AS technique the tngular distribution of light scatterLd
from a dilute particle dispersion is measured To be precise fight
L in be iraffeted diffrtafed or ahsmhcd by the dispersed panicles
(Bohmn ct al 1983) Ss- ittett d light consists of ri llt,tted and I
Iractetl waves and depends on the form sue and composition 01
the particles DiffraLled light arises from edge phenomena and is
dependent only on the geometric shadow Lrealed by each panlLle
diffraclton is mdepcndent of the Lomposltiun of tht, particles Ab
sorption occurs when light Is converted to heat or CICurIL it energy
by interaction with the particles and its inlluenLed by both size and
Lompositmn The NO Lalled l iserdiffraction ICLhnique mLorporatcs
all IhreL of these effects but is generally limited to the more lot
ward SL altering angles The key In aterial p irameter for LAS Is thL
complex refractive index in =n — tk where n is the real cam
portent and k is IhL imaginary (absorptive) component Scattering
irises tluc to differences in the refractive index of the particle and
the surrounding medium (and internal variations in the case of ltet
erogeneous panicles) Values of n have been published form any
bulk m tau ials (see for example I landbtwk of Optic if Const inls
of Solids 1985 1991) but an the case of cement n is routmLly
eslimalLd based on a mass average of (fie refractive indices for
the individual material component`, (Cyr et A 2000) Absorption
becomLs important primarily in the fine Ir u.tton espt.Lt ally behave
I µm Cement is gener illy gr ty to off white to color and therelore
a finite but relatively low v due for the imaginary component is
expected The v due k = 0 1 is often reported for cement although
the origin of this v ilue is uncle it and its appi opi iaii nt ss foi g,enLr tl
use has not been established
There are two principal methods of data analysis for LAS Mae
and Fraunhofer Mic theory describes Scattering by homogeneous
spheres of aihitriry size and is the most itgorouS optical SLaticr
Ing model available For non spherical parlaLtes Mae provides a
volume weighted equivalent spherical diameter MIe theory has
been applied with nixed success to the analysis of powders with
diameters from SevLral hundrLds of mit rometers down to about
100 nm An accurue representation of the true size disiribu
tion by Mie scaltenng is dependent on the input of in accurate
value for the complc,x refractive index For partit les much 1 irger
than the w ivelength of light the Fraunholer method can be usad
without knowledge of the refraLtive index because it is based on
the diffraLtion effeLI only The range of validity for I raunhofer is
limited it the fine end to diameters a low times greater than the
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wavelenl,lh of light denotes] by X for particles that are opaque or
have a large refractive index contrast with the medium (ISO 13320
1 1999(1-)) For more transparent particles or particles with a mod
erate. relraction contrast the lower limit is raised to about 40 x a
For X = 633 nm (red light) this corresponds to about 25 ftm IhL.
benefit of using Fraunhofer diffraction IS th It the inlerpretation
is not dependent on the ibsurptive or refr LLtive pioperticS of the
material On the other h End use of the Fr mnholer tpproxim ikon
beyond the valid range L LEI le Ld to large systematic errors in the
calcul tied PSD (ISO 13320 1 1999(E))
The LAS method requires that the particles be in a dispersed
slate c,ither in liquid (Suspension) or in air (aerosol) The former
I,, presently referred to as the wet method (LAS W) whereas the
latter is termed the dry method (LAS D) DiflctLnces between
LAS D and LAS-W methods trice primarily from the different
ways in which the particles are dispersed in each case
In liquid It is possible to modify Solution conditions by changing
pH or idding Lhemtcal dispersing igents and one Lan disrupt ag
gregates using mechanic, II or ulirisomc energy Fhus for the very
line f r iUton a better st tic of dispersion Lan be tchieved in an ap
propri uely +elected liquid medium Generally w.ItLr is an excellent
dispersing medium However due to the MILtive nature of cement
in water alcohols such a% isopropanot methanol and ethanol are
commonly used in its place
In the LAS D method a Stream of compressed air (or a vacuum)
is used to both disperse the particles and to transport them to the
sensing zone Phis method of dispersion works bcS1 for the coarse
size fraction where the inlcrpartILle contacts arc weak For paru
cleS smaller than a micrometer or highly asymmetric particles air
dispersion is generally not appropriate for sizing
Electricoil 7onc Scnsurg (EZS)
EleLtrIL tl !_one Sensing is based on the Coullcr principle 'I he
powder IS dispersed at a highly dilute Loncemr ition in I conducting
liquid which I% then drawn through a small orifice in an insulating
wall on Lather side of which are placed eleurode% As a pIMILle
enters [he orifice or sensing zone the volume of solution displaced
by the particle causes a transient change in the mLa%tired electrical
iinpedanLL aLross the opening The amplitude of the impedanLe
pulse I% proportional to the partILle s volume 13y ILcumulating
pulses over [line a PSD t% Lonstructed E;7S I,, I p mrlicle counting
method capable of producing a number weighted or mass weighted
distribution of particle size,, and requires cahbralion Different size
orifice% ire used to capture broad PSD- The applicable particle
size range is from about 0 2-800 }im although a lower limit of
0 6 [tin is prob ibly more rcali%tic for normal opLr (ling Londitton%
(Allen 1990 ISO 13319 2000(1-)) Errors Lan arise from Lomu
dent pass ige of multiple particle% through the onfice and from high
asperity p irticles both of which Skew the PSD toward,, larger Sizes
A pulse discrimination system L in be used to correct for the coin
cidence effect by rejecting distorted pulses Porous particles (e g ,
fly ash) are generally unsunt ible for EZS me isurements becau%e
[hell eliLLtive densities Lie not known The dispersion procedure
ind solids Loncentratio❑ are c ritieal parameters for accuracy in EZS
measurements
Sedinunialion (XRS)
The Lhmmgi, in concentration or density of a moderately dilute
(1-6%, in I%,, IrdLtion) Suspunion with time I% measured at known
depths using optical or X ray sensing X ray gravitational seditnen
FERRARIS ET AL ON ASTM ROUND ROBIN STUDIES 3
t ition (XRS) IS well e%t Lblished in %ever it industries Sediment icon
methods are b tsed on the application of Stokes Law which de
scribes the terrain d velocity for in isolated sphere settling in a viz
Louq fluid under the influence of a gravilalonal field Stokes Law
is valid only if [lie Reynolds number (Re) does not exceed about
0 25 (ISO 13317 1 2001) Using t density value of 3 2 g/cm' for
portland cement the I Lrgest (equiv LILnt Spherical) di uneter that Lan
he Sued accurately with XRS I% about 99 µm in isoprop mol (IPA)
at 25 °C Particles larger than this will settle much more slowly than
predicted by Stoke% Law The upper size limit can be incre ised by
using a higher viscosity fluid lrrebularly shaped partiLILN should
settle according to their equivalent spherical volume at low Re vat
ues For line,. the Lffect of BCOwitl in motion exerts a SigmhLant
influence on %Lt[bng at diameters below thou! l µin in w ucr and
about 0 7 µin in IPA Convection current,, in the Settling suspenston
may further limit the lower size range Parameters required for XRS
are solid and liquid phase density and liquid phase viscosity 1 he
particles must remain stable against agglomeration during settling
or the measured PSD will be skewed toward larger Sizes
Scanning F_lecnon Microscopy (Sf M)
The SLM is an analytical tool that uses a focused beam of
electrons to form magnified images Under ideal conditions the
SEM is capable of producing nn iges with a feature resolution al
the nanomeiei level In addition to im ige Lapabihues I properly
LquLpped SLM c in provide mloi rim Mon on the elemental compost
tion of MILroSLopLL features Inform ition on the image ind clernen
tal characteristics of a sample are obi Lined through the mtLr «II0II of
the electron beam with the s imple m Lien it which produLeS various
effects that can be monitored with suitable detectors I he result
Ing signals which include second try and backscatteied LleLlrons
dong with ch it toct-mic photoelectron X rays c in be LoIILLted In
synLhronization with the position of Ric. electron beam it) provide
detailed Spatial and LompoSitton tl information A Computer Lon
[rolled SEM (CCSLM) can provide Simultaneous me i%urLinent of
individual partiLle size shape (aspect ratio) and elemLnt tl win
position by Lonmbimng an SEM in X ray analyzer (LDS) and
a digital scan gent-rator under computLr control [Schwoeble et al
19981 Use of the computerto control the inalysis permits relatively
I.irge number% of individual particles to be analyzed (e 6 1000 s)
Llemental cornpo%icon though in important benefit for research
purposes was no[ part of the round robin tests Errors IypIL tlly arise
because of poor counting statistics for large panicles an inability to
differentiate between primary particles and agglomerates 3 D12 D
effects and/or artifaLls created during sample prep tr Ilion
Data Analysis Mcthodulogy
In both round robins the results for SRM l 14p were an ilyzed
separately from the other cements with the objective of producing
a reference curve th it instrument oper ilor% could use to L ilibrite
their systems of to validate then methodology In other word% the
reference distribution of SRM 1 14p Lould potent[ illy he used to
check that the PSD obtained by a p trticular instrument I Ills within
a defined margin of error or it could be used to offset measured
values by a size range dependent faLtor to bring them within the
acceptable margin of error The more significant errors as,.owated
with the measured PSD Lurves Lonung from different l thin dories
and users are most likely due to systu natic difference% th it result
because deviLeS differ in system OIL way% on nuisance I idors To
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4 CEMENT CONCRETE AND AGGREGATES
determine the reference distribution for SRM i 14p two approaches
wuie considered
• Approach I Lstablish a single calibration curve that repre
sents an average distribution for all techniques Inclusive (I e
all inclusive Ippro.ILh)
• Approach 2 fist ibhsh a calibration curve for each technique
(I a teLhmque ,peLilic approach)
Both approaches It ive advantages and disadvantages In the
first approach (all inclusive) the calibration curve would be less
precise (greater margin of error) as a result of cumulative van
Mom in the precision of different methods On the other hand
the lirst approach is simple and convenient because every cus
lomer would use IN, same calibration curve In the second ap
proach (technique specific) the calibration should be more pre
use because variations resulting from ddferenLLs in measurement
principle or precision would be eliminated As a disadvantage,
several calibration curves would need to bL established mdepen
dcntly one curve for each method and this would require a static
tically relevant pool of round robin participants for each technique
the best possible approach of course would be to establish a
calibration curve based on an independent determination of the
true PSD using I method that can be v did tied theoretically
and/or experimentally such a method does not uirrenily exist for
cement
In the second round robin (used as the b Isis for development of
a relerence curve) 39 parocipants (93% of all participants) used
the LAS technique OI these 26 (62% of all participants) dis
persed their powder in a liquid (LAS W) and 13 (31%) used
a dry powder method (LAS D) On the other hand there was
only one particip ml that reported using SEM and two who re
ported using I:LS I herefore using the technique specific approach
(Approach 2) a St IIIstiLally relevant calibration curve could only
hi, determined loi LAS W and LAS D Obviously Ill 42 sets could
be used if the all uu.Iuslve method (Approach 1) was followed
but the resulting curve would be heavily weighted by the relatively
l Irge number of LAS results Therefore, it was determined that an
Ill inclusive calibr Ilion curve was not appropriate for this database
ind the development of a reference PSD curve was limited to the
AS technique
io delennine the curve that best represents the consensus PSD
for LAS outliers must first be identified and excluded from calcu
lation of the reference curve I he method th it w is idopted here Is
based on calculation of the mean and the two sided 95%confidence
limits using the bootstrap method The bootstrap method replaces
difficult (or even Impossible analytical) solutions to statistical prob
iems with raw computing power (details on the bootstrap method
are provided in Appendix C of ref [Ferraris et al 2002a]) The
bootstrip method does not explicitly provide the criteria needed to
determine outliers I herefore we selected lhL following criteria for
elimination of oulheis If more than 27% of points (I a four (I it t
points) m a single round robin data set (I e a curve provided by one
round robin part icIp inn) exceed by more th in 5% the confidence
limits determined by analysis of all data sets Ili the grouping (I e
curves provided by all participants) then this individual data set
is identified as an outlier The tolerance value of 5% is based on
the absolute difference between the measured value and the closest
confidence limit v flue Once the outliers are detennined the mean
Ind 95%, confidence limits are reLalLui tied excluding the outliers
The resulting mean curve is then defined as the consensus relerence
curve representing SRM 114p No judgment was trade on how the
d Ita were generated in the LAS I e wh it p it unelers were used
such as refractive IndILLs dispersion methodology elL Discussion
of these parameters will be given below
Deternimation of the Refetene e PSD foi Lawi Diffiacrion
I or LAS measurements both wet and dry two sets of results
were collected
• Participant s in house method (PM) thL p uuclp int% were re
quested to use the method that they norm illy use and to de
scribe it in detail
• Specified method (SM) all participants were requested to use
a set of parameters specified by NiST (Appendix D of ref
[Ferraris et A 2002b])
We have examined IhL two sets of d ita %ep a itely tnd then in
combination alter first excluding the outliers A% I result of this
process three mean bootstrap curves with 95%, confidence limits are
provided for both LAS W and LAS D The issue Il then to decide
which mean curve or curves I% most appropriate as a reference
for SRM 114p using the LAS technique Note that high and low
intervals are not symmetric about the mean These limits can be
asymmetric around the s imple mean This Is caused by a slight
skewness of the generated bootstrapped sampling distribution of
the Inc In
All individual d it r sets used in this analysis are reported else
where [Ferraris et A 2002b] Six outliers were found for LAS W
out of 25 participants Ind two outliers were determined for LAS D
out of t 3 particrpants I he bootstrap results are given in Iable 1
for LAS W and Table 2 for LAS D A graphical comparison of
the three distributions I,, provided in Fig I for LAS W and Fig 2
for LAS D As shown tit these figures the differences between the
three PSD% are not very I trge Because the combined distribution
tepresents a larger statistical pool it could bL argued that the coin
hined PSD should be used as a single consensus reference curve
Coitecuon Pioceduiefoi Unknonn PSDs
fhe purpose of a reference PSD based on an easily accessible
reference materi If Is twofold to verify the efhc icy of the mstru
inert or method being used and to correct measurement results by
applying a set of Lurrecnon f ictors A procedure in which the mean
PSD curve is used to correct measured data obtained using various
instruments would work in the following m inner 1) Calculate the
correction factor for each vie defined as the ratio between the mea
cured value and the mean value as shown in I Ible l for LAS W and
]able 2 for LAS D 2) Multiply measured vie d ifa for unknown
% imple% by this correction factor
Phis procedure w Is Ipp11Ld to all av ul ibiL d it I sets for CCRL
143 Ind 144 which were provided to the p articipants of the
second round robin study I igure 3 shows some selected results
from this analysis The complete results are provided in a sepa
rate publication [ferriris et a[ 2002b] It was initially expected
by the ASTM committee that a single method ind relerence PSD
could be used to correct all measurements however, in practice
this proved problematic If the target measurement results them
selves (not the La]Ibr Iron Lurve) contain outliers (I e data points
that ire more than 501f) outside the confidence limns obtained with
the bootstrap method) the correction is not sulfic ienl to bring the
entire Lurve within the confidence limits of the Lalibration curve
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FERRARIS ET AL ON ASTM HOUND ROBIN STUDIES 5
TABLE I—Buru�f?fjpdrtuforLASW(vJ1<rr�rlttdmxoudstit) Stvrifer,torqursalenr%phrrualpamelediametcr
F.M Only
SM Only
PM i- SM
Si/C I Jim ML in Low 1116h Mean 1 ow High Wan Law Iligh
1
50
35
63
60
39
83
54
42
67
15
79
64
95
95
72
121
87
72
100
2
11 l
96
125
137
116
159
122
109
135
3
163
148
179
190
167
213
171
162
190
4
205
190
221
234
21 1
257
218
204
232
6
279
265
294
307
291
33 3
29 1
277
306
8
34 1
329
35 5
373
349
397
35 5
34 1
370
12
45 8
439
478
490
45 7
52 1
472
454
49 1
16
547
527
560
580
550
612
162
542
579
24
697
680
71 6
725
698
75 1
71 0
695
726
32
904
788
82 l
834
81 3
851
81 7
803
83 1
48
920
91 5
937
943
910
955
934
925
942
64
97 l
964
979
983
97 5
989
976
97 1
98 1
96
994
990
997
997
995
999
99 6
993
998
128
999
997
1000
1000
99 9
1000
999
998
100 0
TABLE 2—1 mm%riapdataJur LA DJar PM(aftu eXtlttdrnl, utrtltrr5) Srzt riftri toeganalcm %phurrrrl pruit( le drorin m,
PM Only SM Only PM +SM
Si.,a [WnMLan Low Hi6h Mean Low High Wait Low High
1
50
27
73
44
26
62
47
33
61
15
79
45
109
67
39
92
73
54
95
2
123
102
W5
119
103
133
121
106
134
3
191
155
206
172
154
193
177
161
193
4
230
202
260
215
193
236
229
203
242
6
909
276
344
287
260
308
299
278
120
8
17 1
339
405
347
32 1
367
359
339
38 1
12
473
440
50 7
453
432
473
464
444
484
16
55 3
522
584
53 7
520
554
546
528
567
24
689
659
71 6
679
667
693
684
669
70 l
32
799
764
8l 2
796
776
797
787
773
802
48
907
887
926
915
904
927
91 1
899
922
64
959
942
975
967
95 9
977
963
913
973
96
987
975
99 7
995
99 2
998
991
983
996
128
99 1
979
999
999
998
1000
995
988
1000
100
90
—�— PM
80
f SM
70
—�— PM+SM
60
m
50
E 40
�j 30
20
10
0 ;
100
90
80
70
m 60
m 50
E 40
3o
20
10
0
1 10 100 1 10 100
Size [urn) Size [mm]
E'1C l—Gruphurr! c unrl,rrrr�nn of the Roattitrup mran r tarts uhtrtrrred I ICE 2—C,rulrJncul runrpurrtiun uJ rhr Butlfrfrap nreun curer s ohrrrrnrr!
up Table I (L.A S W) lop clamy Me cunjrdem a intervals air no( Ov%it in lable 2 (LA S D) Fur clan uy rhr r uufrrlem r interi al s are not chotsn hire
h(.rc bin can he frrtrnd in lablc. 1 bur t an hr juund in Tahle 2
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1 6 CEMENT CONCRETE AND AGGREGATES
100
80
L
�
60
w
E
40
20
0
100
80
L
y 60
40
V
20
D
-♦-- 450
-A- 611
-0-W
— 95% Low Limit
— 95% High limit
A
10 100
Size [µm]
1 10 100
Size [µrn]
l IG 3—Cotre(irons of selcc rcd data for e e ntuu CCRL l43 A) Dara aN
numinr(l B) Data coiretud In tht lcAend 450 611 and VG represent
e odccl rlutu sets from par tic pants in the tound robin Also shown in the sc
graphs arc the 95`/, hmtrs
(I ig 3) On Ihe, other hand if the data set Tres completely within
thc_confiden" Innits defined by the reference curve the correction
I actor will reduce the overdl spread of the data I herefore the
reference curves for SRM I I4p could be used in two ways 1) As
part of a validation method to check that measurements are within
IIIL confidence limit range of the reference This will Iltow the op
(-ralor to determine it sample preparation problems or possibly a
m iltunctioning instrument should be considered 2) As a calibra
lion curve to correct data from unknown samples afict the method
It is lint been validated as mentioned above I his correction should
be used caret ully, since the, corrected PSD could remain Outside the
acceptable range
Measurement Wthodology
Fhe scope of this study was also to compare the lest sample
preparation and rneasurenicni parameters used within the cement
industry for I given technique To facilitate this comp irison par
ticip Inv, were asked to provide specific detailed inform ikon about
their in house methods This inform ilion was kept conlldcmial
such th It no specific, technique, method or set o1 results could be
identified with a p trtlLular org tniv ition In this section we will
examine the methods used and determine if it is possible to develop
a best practice that could eventually be presented to AS I M for
approv al as part of I standard lest method Only the information
submitted for laser diffraction will be examined here as we do not
have sl itistical representation for other methods
Laser l)rfj"iut Iron it ah du Sp(emir n Drspct st d rn a Lrqurd (! AS W)
Participant provided information concerning in house method
ology was divided into Iwo area,, sample preparation and analysis
It is important to ex iinme the responses with two goals in mind
1) can 1 consensus procedure or procedures be established Ind 2)
can we identify p iranieters that significantly impact results r
Suninim3 of lndusd y Piactic e fm Sample Pi( pataNan
In the irea of sample preparation the following key information
was requested where approprt tie dispersion medium solids con
centration dispersion procedure surfactant (it used) and type and
duration of ulir isonic treatment (if used)
Each of these items should be, clearly defined if t standard test
is proposed to ASTM Only a summary will be given here as the
details are described in reference [I'erraris et d 2002b]
Most I_AS W participants used alcohol is a dispersion medium
54% used isopropanol (IPA) '31 % used eth cool and ii% used
methanol (percentag(, were rounded) However the use of ilcohol
was not universal Two participants (8%) used an aqueous medium
despise the obvious problem with hydration
The second tuuc concerns 111L coneentr Ilion of cement in the
me isunng cell Ind the dispersion and/or dilution method used to
achieve that concentration This information is paramount because
It can iffect the ability to fully disperse the, cement and could
lead to i user bI IS or increased v In ibility in the me isurements
Furtheimore solids concentration is a key parameter for any light
scattering technique due to the ctfects of multiple scattering when
concentrations aretoohigh and minimum signal requirements when
they are low
I he in ijority of tound robin p irticlp ints prepared their cement
powder suspensions in a single step (I e they analyzed the sam
ples as prepared without funhcr dilution) hi some cases a known
amount of cement was added while in other cases the addition
amount was vaned to achieve I cen tin optical obscur ition level
in the cell The optimum percent age obi ur Ilion r Inge is prede
termined by the measurement device requirements AS a result
the concentration used in the round robin v tried widely and was
reported explicitly by only 12 of 26 participints who used liquid
dispersion It could be concluded from these results that the most
common practice is to adjust concentration in suu (i e , with the
suspending liquid in the measurement cell) based on obscur ition
levels It inighl be dilficull therefore to prescribe a fixed solids
concenlr Ilion ina sl indard test nicthod since different instruments
may require different obscur uion levels An alternative approach
would he to specify the solids content for a stock concentrate a]
lowing some control over sample preparation but the stock would
then be diluted in suu (using the chosen suspending medium) to
obtain the optimal obsLuration level [or a particular instrument
Another factor Influencing dispersion relates to the use of ultra
sonic iron to break up agglomerated particles a common practice
in many industries hound robin results show that 69% of LAS W
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FERRARIS ET AL ON ASTM ROUND ROBIN STUDIES 7
50
45
40
35
30
0 25
0 20
15
10
05
00
50 100 150 200 250 300 350
Duration of Ultrasonication [s]
I I 4—Cwrtlarion of teporied ultrasotmc rrtufintnr eGuanon and tiro
di%r r »nn of the smaller size fraction reprtit nicd hire h� Dto
users employed ultrtsonic treatment of cement dispersions before
measurement Of these 63% used in line ultr isomcalion provided
by the instrument while the remainder used in c,xternally applied
ultr tutnic, device prior to sample introduction to the measuring cell
Onc p irticipant reported using both extern d utd HI JIM ultrasom
c ition in series I he power and the dur ition of the, ultr ttionlcalion
should be compared to determine the best procedure for an ASTM
st Ind [rd Unfortunately the power cannot be c.xpli fitly compared
because values are not always reported in fundament Il units (I e
Walls versus a relative % scale) nor I% output power always clearly
delined with respect to the device geometry and s unple volume
I unherrnore the sound frequency is rarely known or reported On
the other hand the duration of treatment was reported by all p irtici
pants using ultrasonics and it ranged from I O-300 s with a median
v ilue of 60 s A comparison of reported ultrasonic, treatment dura
lions and the metsured Dip values5 is given in rig 4 there is no
clear dependence of the fine traction size on duration nor IS there
My ipp ircnt sorrel pion between duration ind the occurrence of
outht.rs I urther studies to determine the Imp Icl 01 ultr isomi, treat
mint duration on dispersion of cement in alcoholic, media were per
formed it NISI (I lackley et at 2004) In thcse studies an extern it
ulir tsomc immersion device was employed Suspensions were pre
pared al a solids volume fraction of 5% in IPA Results summarized
in I ig 5 Indicate that after an initial treatment duration of 60 s at
in output power of 90 W further treatment provided no additional
dispersive benefit From the resulting PSDs it IS clear that the nul tat
treatment improved dispersion of the liner fraction (below 20 µm)
while having no apprecrable impact on the coarse fraction
Suniniat) of the Analysis Methods
[he three specifications requested from the participants with
respeLt to the analysis step were duration of the rncasurernent
model used to fit scattering results (Mie or rraunhofer) and if
Mie complex refractive index used (real and irn igin try) for both
c.ctrteiat utd inedlum
I ht, reported measurement duration vaned Irom 4-120 s This
is a wide range that seems to depend prim irdy on the commercial
5 Panrck diameter below which 10% of the mess ui tht PSD is found
Reprt%Lrus a charattensnc particle size for the hnest iracuon
100
90
0- 0 min
- v - 1 min
80
--o- 3 min
-o-- 5 min
70
60
0
ai
E 50
a
O
40
30
20
10
10 100
diameter (um)
FIG 5—Cmnrnlume PSD of ernrent powder (CCRL 135) in IPA rn a
funrtronof ulnrlwnu traramitit d rertion
device used Nevertheless the majority of measurements were of
60 s duration or less Ind this rs clearly one reason that LAS has
become so prevalent within the cernent industry However no cle it
correlation w IS observed between measurement time and PSD re
suits and presumably this is because each instrument determines
the length of ineasurt,ment necessary to reach some internally set
signal to noise ratio
As stated in the introdutitton of the two optical models for in
terpreting angle dependent sc iltering by particles Fraunhofer and
Mie only the second one iequires the refractive indices to be spec,
ified AiLLOrding to ISO 13320 1 the I raunhofer model works well
for particle sires >50 pin foi ptruLle sues <50 µin the, Mil,
model Is preferred it I ie Icon ible estimate of the refr icuvc mdu t.s
are avtit tble In the inteimedi tie range Irom about l µin to 50 µin
the appropri ueness of the LholLe of optical model will depend on
whether the rel hive rcii iuive indices (ratio of particle to medium)
are high or low Intl thus the decision is more comphcated In the
submicrometer range the I raunhofer model is not applicable fhe
availability of different optical models on a particular commercial
instrument may Iho be, a 111711ting I actor for some users It w is found
that 80%r, of the participants used either I-raunhofer Nlie or both 11
is surprising that as nt Illy 1s 16% of the participants seem un iware
of which optical model they are using to analyze their data
The choice of complex refractive index IS critical if the Mie op
tical model IS used to interpret the d Ita and produce the PSI) of the
cement For the cemt,nt phast. I111, value of the real component of
the index reported by round robin participants varies from l 23 to
1 88 But if we excludt, the single value it 1 23 the minimum v duc
is then 1 6 and the ringt, Is significantly narrowed the median
value is 1 73 if 1 2*1 Is exeJuded Most participants (64%,) used
0 l for the Imaginary ( absorption) component of the reiraUave
index of cement t value that Is widely reported by instrument
manufacturers and in the literature Other values reported were
0 01 (by 27%t, of the participants) and l 5 by a single participant
I
Copyright by ASTM Ina I (all rights reserved)
I Reproduction authorized per License Agrccmcnt with C1UARA P PERRARIS (NIST 131 RL) I ue Nov 30 11 31 29 EST 2004

8 CEMENT CONCRETE AND AGGREGATES
90
80
70
c
60
N
50
w
E 40
0
30
20
IF41
0 Im=O
O 1 m=0 01
- -,v -- - I rrr-0 05
J— -v — I m=01
— -# — I m=0 5
— —� — Im=1
i
'r
100
90
so
70
c
m
t
ui 60
to
,d 50
0
at
�
40
0
30
Oil
—0 Re=14
O Re=15
---t -- Re=1 6
— -� — Re=1 7
— f — Req-,
— —o- — Re
O
0
01 1 10 100 01 1 10 100
diameter (um) diameter (µm)
116 0—Calculated citnw atisc PSD Jot Guntur por,dtr (GGRL 1 f5) 1-I0 7—Calculaud cunnilatnt PSD fur ttnun1 paiidcr (G(1t1 135)
atspetsed in IPA us a function of the inragtnens coniponrnt (lin) of the dispersed ni ll'A as a fntiction of tlic real curnponint (Re) of thi coinplct
t oonpler iefrac tive index %ith the real coinponent fined at 17 refiat rite tildes with the unagrnaty eoneponenr fiat d at 0 1
A consensus v due for the rc It and complex indices would yield
1 73 and 0 1 respectively 11 should be noted that the data set pro
duced ustng the refractive index value of l 5 far fronn the me in
nevertheless was not determmed to be an ouil ter in the subsequent
sl Ittstical malysis Sources for the refractive index values reporled
by the panicipanls were not requested and were not shown Because
these values can vary with powder composition it is in interesting
observation that each parttup nit appareraly selects a single set of
values and applies them to all cements regardless of composition
11 some considcralion was given to the compositional variations
during the selection process it was not possible to determine this
from the round robin study
Tht, influence of variations in the re it and imaginary compo
ncnlS on the content PSD L,IILulaled using the Mie opltcal model
was examined it NISI I he imaginary refr iuive component pri
manly impacted the fine fraction of the PSD as indicated in Fig 6
for CCRL 135 cement in IPA When the real component was fixed
at 1 7 (t e close to the consensus value derived from the round
robin results) and the imaginary component was allowed to vary
only sties below 10 µm were signiflcanily impacted I hese results
demonstrate th it ignoring ihsorplion or using a value for the imab
nary component that is too .mail leads to an undLremimalion of
the, line I raclion particularly st/es below 2 µm 'I he imp to Of the
im igmary component also depends on the value of the real compo
vent for highly retractive materials having area] component above
17 the effect of absorption on the PSD quickly becomes negligi
ble the effect of varying the real component with the imaginary
component fixed at 0 l (i a the consensus round robin value) is
shown in Fig 7 for values of 17 and higher only the line fraction
is significantly impacted by changes in the real component and
the 000 is ref itively sm ill However for values below 17 the
entire PSD changes drastically with relatively small ch inges in the
real winponent The behavior is sunilar for smaller fixed values of
the tin igmary component where we find that the critical value for
the re If component (I a the value it which Iunher incre ises have
minimal Impact on the calcul ttcd PSD) decreases with decre ►sing
Im igui iry component In other words the more refractive materials
(high real component) are less subject to absorptive effects and the
less transparent in itert ils (high imaginary component) can exhibit
strong refractive index effects if the real component is below a
critic it v due
A standardized test method would have to tecount for the pos
sibllity that either the f raunhofer or the Mie model might not be
available to every user An ASTM standard should also recommend
refr iLtivL indices to be used lot curtain types of c,emenl or alter
natively i method for estimatmb these values based on the known
composition of the powder Further studies to establish the influ
ence of the model choice and model parameters were conducted at
NIS 1 (11 rckley el it 20(kt)
Laset Dif action xah the Specimen Dispei sect in Ali (LAS D)
The s imple prep tration issue is greatly simplified in the c ise of
LAS D since powders ire introduced to the measurement device
in dry lorm with dispersion provided internally by the iintrument
Aerosol dispersion methods for commerual LAS D instruments
are b i.ed on the use of edher compressed air or an applied v tcuum
In addition each instrument comp my incorporates its own propri
elary S ample delivery and dispersion system which might include
for insi ince use of vibration or other mechanical devices There
were I; p trucipanis who used LAS D 85% of these used systems
based on compressed air one ust,d a vacuum based systcrn and
Copyright by ASTM Ini'I (all rights reserved)
Reproduction autliorvcdper Liccnsc Agreemuit with CIIIARA h I LRRARIS (NIS1 131 RL) Tut, Nov 30 It 31 29 EST 2004

30 -
25-
20
E
-
0
0
10
05
00
•
Pressure [bar]
4
iK; S—R(lutiortslicphctwrcnUtt)utidthctcpnrttdprc�%uteu%cddanrng
LAS Dtncusurtintrai
one used a system incorporating both compressed air and vacuum
presum ibly in series One should keep in mind that this information
w is reported by the participant and is not necessarily an accurate
trod complete, assessment of the instrument s actual specifications or
c ipabihties i he duration of the measurements another potentially
sigmhcarrt measurement parameter varied from 4-130 s The me
than value was 15 s So on average LAS D appears to be somewhat
faster than the corresponding LAS W measurement
The pressure used during the measurement when compressed air
was employed vaned from 1-4 bar As shown in Fig 8 there is no
clear correlation between the diameter of the finer fraction of the
particles represented by D10 ind the reported air pressure This
lack of correlation may be due to the high level of scatter from
other effects including user and instrument bias or these pressure
levels may be ibove Ilse minimum level necessary to fully disperse
the material to the extent possible in a dry powder
Like LAS W LAS D requires the use of an appropriate optical
model and wliere appropriate the selection of refractive index
values rho, in gorily of round robin partiripanls reported using thi,
I raunhof w model (^ 45%) 31 % reported using Mic 8% used both
ind 15%, were LI issifted is other The category other Includes
those not reporting a specific model or providing information
that could not he clearly identified with either Fraunhoter or Mie
I he vari aton in the reiractive index reported by LAS D users is
rel itively small I his is not surprising as most used the Fraunhoter
model which does not require knowledge of the optical conslints
In LAS D since the dispersing medium is air, the refractive index
is needed only for the particle phase All participants who reported
a complex relractive index used 0 1 for the imagmar� component
Most of the reported values for the real component were close to
1 7 One p irlicipant reported i value of 1 0 which is clearly too low
for Lemenl powder Based on the typical composition of poriland
cenitni ind thL known refractive index values for the individual
Lornponen[s ([Cyr el al 20001) a value near 1 7 seems appropriate
Agate a proLedure for seleuing or estimating the refractive index
should be esl iblished as part of a LAS based standard
i
C.onclustons
his report had two princip it go ils related to cement powder
wing and therefore there should be two sets of recommendations
100
90
80
70
60
i� 50
E 40
tj 30
20
10
FERRARIS ET AL ON ASTM ROUND ROBIN STUDIES 9
-.- LAS-D
�— LAS-W
10 100
Size [mm]
FIC. 9-6tupliu al r onipat rson he trsc c n the distrrhutions (uh uland fco
only the 1.AS W (labh 1) of 1A4 D duta (lable 2) For clatity the (anti
chtie cintctudsatcnot shoiinhctc but can hcfoundinthctot respondtnA
labt( s
one rel tting to the prospect of establishing a reference materi it
for PSD me isurcnienis and one related to the development of i
standard rnethod for cement PSD measurements Because the great
majority of p irticipants reported using a LAS based technique
only LAS will be discussed in the context of reference materials
and standards
Refciencc Matetial
As SRM I 14p is widely used in the cement industry for calibra
tion of the BI une measuremenl it i% an appropri tie choice to be
used as a reference material for PSD determination Various PSDs
were obt uncd by statistically analyzing the data obtained from
round robin participants from [his study two curves were .deve
loped one for LAS Wand one for LAS D As shown in rig 9 (lie
two curves do not differ signhfiL intly Therefore it Luld be argued
th it only one curve should be piovided as reference Nevertheless
the authors suggest th it at this point the Iwo curves should be pro
vided I urther knowledge on llus issue will be gained when the
next goner icon of SRM 114 is developed by MST
The mean PSD curves obtained from the round robin tests have
been idled to the certiliL ite for SRM l l4p as inform itional d it i
(I a not LLrtilhed) I he supplies of SRM l 14p available at NIS 1
cover industry needs until about summer 2004 Therefore NIS I
initiated. (2003) the prof educe for securing and characterizing the
next SRM 114 m tlert it The ceridiLate for the new SRM 114 will
also include a relerence PSD based on the LAS technique A sta
tisttLally mLaningful reference PSD for Ic6niques other than LAS
was not possible clue to the low number of corresponding d-ita sets
obt imed from the most recent round robin study
Standard Method
Because the round robin results suggest that a large majority
within the LCInent industry (over 90% of participants) use some
Form of LAS it would seem logical to focus initial efforts on the
development of a standard method (or best practice) for cement
powder suing based on this technique
lo cst tblish such i sl tnd ird the procedures used by industry to
iriL tsure PSD were Lxaniined by analynng the intormatmn that was
1 Copyright by AS I M Int'I (all rights rLscrved)
RLprotuctton authorizLd pLr I icense Agreement with CIIIARA F FFRRARIS (NIS i 131 RI ) I uL Nov 10 11 31 29 EST 2004

10 CEMENT CONCRETE AND AGGREGATES
provided by the round robin p trticrp-ints Although there Is a wide
r ingL of method% used to prep ire and analyze test samples some
trends could be identified Additional experiments at NiST wort,
u%Ld to examine the impact of key parameters related to IN, ust, of
LAS techniques (ultrasontcation and the index of retraction hive
been previously discussed) A combination of industry practice
Ind supplemental experiments could be used as the basis for a draft
standard method
LAS W is subject to the greatest amount of variation due to
simple preparation In LAS W the following parameters could
be esl iblished based on the results of these studies suspending
medium IPA solids concentration lixed stock suspension obu.0
r Rion level modulated at dilution
Based on measurements performed at NIST using several coin
Ilion alcohols (data not shown), IPA appe irs to be the best choice
Although the treasured PSD varied very little between meth foul
ciliatiol and isopropanol in these experiments the latter medium
offers a viscosity advantage that could reduce variability arising;
from the sedimentation of large particles during sampling or mea
surenteal For example at 20 "C the viscosity of IPA (r1 = 2 41) is
roughly twice that of ethanol (1 20) and nearly four times higher
than methanol (0 597) A number of surface active agents were
also tested to determine if an improvement in dispersion could be
achieved in alcoholic media No ctinsrsteni or clear advantage could
ht, observed for the addition of commmon commerc tat surldctdnts
In regards to solids concentr pion this parameter could be eon
trolled in two ways First the solids content in the test suspension
could be fixed and tberelorc a single solids loading would mp
ply to all cement formulations users and instruments Second the
optimal obscuration value as registered by the instrument would
determine the final solids concentration after dilution from d stock
wncenlr ite In the first case the sarnple would be introduced to the
instrument as prepared In the second case a concentrated stock
suspension would be prepared It a fixed solids loading by all users
ind followed up by obscuration btsed dilution into the pure sus
pending liquid preloaded into the instrument circulation syslemn
I he former method oilers contplCle control over the,, imple prep I
ration procedure which is a l irge potential source of elror bul
optimal measurement concentrations may vary between cement
formulations and Instruments I he latter method offer less control
over sample preparation but is more flexible broadly applicable
and may be a good compromise (prescriptive versus performance
based methodology)
On the other hand a better understanding of the influence of the
following parameters on the results should be investigated further
1) Refractive index used in iMic model and 2) Duration and intensity
of ullrauirucdtion
BecduMe there wete fewer parameters to select for the LAS D
nicthod the standardization should be less complicated The use
U1 compressed air versus vacuum for powder dispersion I% I 1 ictor
determined by the manufacturer and not the user and thus cannot
be standardized The pressure used in compressed air systems can
be varied somewhat but the possible influence of this Nclor on the
measured PSD of cement requires further study As the size of the
finest fraction of particles cannot be accurately determined using
I raunhofer QISO 13320 1 1999(L)p and the refractive Indices of
cement are not accurately known for cement the authors suggest
th it both models be mcluded in i st mdard or that a lower size
hrmit be set for reporting PSI)s Furthei research to delermint,
appropriate refractive index v flues for cement in the c Ise of Mie
Inalyvs should be conducted or I consensus complex relraetive
index should be set
Therefore there is i strong argument for AS I M comnultee
COI 25 01 and NIST to m ike an investment in time End effort
to develop a standard test method to measure the PSD of cement
powder using LAS (both wet End dry) From [his rt,port st ver EI
parameters could the Idy be n irrowed or fixed A sm Ill t isk group
could conceivably help delete the next set of Speullcations it) be
recommended for a luture round robin as part of the st Ind trds
development process
Acknom ledgmenl s
The authors th ink AS I M Iask Group C01 25 01 and the eh ur
man Charles Buchanan Jr for providing the opportunity for these
round robins and subsequent analysts We thank all partieip inns of
the round robin studies (listed in references [Ferraris ct al 2002a
2002bp for providing tone, and stall to perlorm the tests We thank
Robin Haupt and the staff of the Cement and Concrete RLterence
Laboratory (CCRL) who provided the cement sainplt s and Lin
Lum of the Ceramics Division who perforated the Idler diffraction
measurements at NIS i
References
Allen T 1990 Paidnli Size Mcartncment 4th ed Chapman Ind
"Ill London
B firth H G Ind Sun S 1985 "Particle Size An ilysis Anal
Chem Vol 57 l i I R-175R
Beddow J K Ind Meloy I P Eds 1980 dcsrurg and
Chayacierrzairon of Pondeis and Fine Paincles Ileyden
London
Bentz D P Garboczi L J flaecker C J and Jensen O M
1999a Effects of Cement Particle Size Distribution on
Performance Properties of Portland Cement -Based Mate
pals Cement and Cowrete Reseaich Vol 29 pp 1663-
1671
Bentz D P 1999b UICcls of Cement PSD on Porosdy Pei
colation and Sell DeslCc itiOn SO Dt tit c alion and ill
dmpoi tun i in Cone ti li Teehnologti Piet t t ding, s of raze
2nd Inter nalionul Reuaitlt Senitnal June 18 1999 Lund
Sweden Person B and Fagerlund G Ld% pp 127—
t34
Bohren C F and buffet in D R 1983 Abmi ption rind Si ante! ing
ofLighi h) Small Panicles John Wiley & Sons New York
Bowen P 2002 Particle Size Distribution Measurement from
Millimeters to Nanometers and from Rods to Platelets J
Disp Sci Tcch Vol 23, No 5 pp 631-662
Cyr M and lagnu Ilatnou A 2000 Particle Slzc Dislribu
tion of 1 inc Powdcrs by LASER DitfldetIOIl Spt.c.tromctiy
Case of CementitiOtis Maleri its Matti rat+ and Sou( iui c s
Vol 34 pp 342—i5fl
Ferraris C F KuAley V A Aviles A I and Buch in in C L
2002a Analysis of thL ASTM Round robin Tcst on Particle
Size Distribution of Portland Cement Ph rise I ' NISTIR
6883 Nation it Institute of Standards and [ethnology
Ferraris C F HaLkley V A Aviles A i and Bitch in in C E
2002b An tlysis of the ASTM Round robin Test on Particle
Size Distribution of Portland Cement Ph tse Il NISTIR
6931 National Institute of Standards and Technology
Garboczt E J Bentz 1) P Snyder K A M irtys N S
Stutzman P L I erraris C F and Bullard J W 2003
Modeling and Measunng the Structure and Properties
of Cement Based Materials electronic monograph
I
Copyright by ASTM Int Kali rights reserved),
Reproduction authorvcd pe-r License Agreement with CI IIARA F F1 RRARIS (NIST BI RL) l ue Nov 30 11 31 29 LS1 2004

Nation it Intiulute of Standards and Technology (http /!
ciks cbt cost govlinonograph)
Hackley V Lum L S Gintautas V and Ferraris C Particle
Sive Analysis by Laser Diffraction Spectromury Appli
cations to Cementrtious Powders NIS I IR 7097 March
2004
Handbook of Optrcol Conuanl% of Solydti F D Palik Ed Aca
demte Press New York 1985 Handbook of Optical Car
vraniA of Solydti 11 L D Palik Ed Aetdemu, Press New
York 1991
ISO 13120 1 1999(E) Particle site inalysis—LASER diffr,ioio❑
methods —Part 1 General prinwples
FERRARIS ET AL ON ASTM ROUND ROBIN STUDIES 11
ISO 13319 2000(E) DeterminatiOn of particle sve drstribulions—
Eleetrreal Sensing /one method
ISO 13317 1 2001 Delermination of particle size dmi-ibulion by
gravil Aron if liquid sedimentation melhods—Part 1 Gui
eral principles and guidelines
Schwoeble A J Dalley A M Henderson B C uid Casuc(-to
G S 1988 Computer Controlled SEM and Micro
imaging of fine Particles Journal Mew)% Vol 40
p 11
ASTM C 115 96 Standard Test Method for fineness of Portland
Cement by the Turbtdrmeter Annual Book of A57 M St in
dards Vol 04 01
Copynght by ASTM Int 1 (all rights reserved)
Reproduction authorised per License Agreemcnt with Cl IIARA I I•LRRARIS (NIS r W AI ) Tut, Nov 30 11 31 29 LST 2004

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DEVELOPMENT NAME: Prestige Concrete
REMOVE EXIST] G METAL RISER g
DISSIPATOR PAD AND 24" CMP (,
12'L X 4'W X 22"THICK g\SE
CLASS B RIP RAP fig" M A- g 8•g•' STREET ADDRESS: 2865 Lowery Street m Q
10?/ \s I 3• PIN NUMBER: 1830.04-70-0765
PROP. INV. OUT=828.50' „s\N ,C O ,* ti0NQ /
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P\P TOTAL ACREAGE: 4.079ac R !
28LF OF 24" CURRENT ZONING DISTRICT: General Industrial (GI)
Q RCP 0.75°l0 ..� 1 `fl�►l
N if ��ON CO _ GENERAL INDUSTRIAL DISTRICT
\CA , = ltirterN7;'"`'' ' REQUIRED MIN LOT SIZE: 20,000 sf
�S 49B 37 2 �` k\�• fi MINIMUM LOT WIDTH: 150 ft
MD O8 45'Fj7 i ' = _ • r`r I SETBACKS:
6 -,. _ FRONT: 30'
X �N �2' -- _` r „� CHAIN
1 A _____________5_,�. 3 ',£ f -•30 AM �- LINK SIDE: 10'
N�6oZ g �N FENCE I REAR: 30' o
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GRATE=832.25',o. . Ik. 7 1 I ..) There are no perennial streams, floodplains, or wetlands located o w
GE -- t 4r '\NC' } 1 INV. OUT=828.75 this property.
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I �1 k Prestige Concrete
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10-year 2-year 10-year 2-year 10-year 2-year 30 15 0 30
Runoff Drainage Left Side Right Side 10-year 2-year 10-year 2-year
O Channel/Berm Rainfall Rainfall Total Total Upper Lower Channel Bottom Channel Channel Shear Shear 10-year n 2-year n Temporary Permanent - - - - ,
• C eff- Area, A Length (ft) Slope, Z:1 Slope,Z:1 Normal formal Velocity Velocity
citjr CHECKED BY: JBC
Name Intensity,. I Intensity, I Runoff, Q Runoff,Q Invert(ft) Invert(ft) Section Width (ft) Depth (ft) Slope (ft/ft) Stress Stress Value Value Liner Liner SCALE: 1INCH=30 FEET
o iciant,C (acres) _ (ft) (ft) Depth (ft) - Depth (ft) _ Iblft2l (Ib/ft2) (fps) (fps}
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L Channel 1 0.90 6.86 5.32 1.35 8.33 6.46 840.00 838.25 168.00 V 0.00 3.00 3.00 2.00 0.010 1.03 0.85 0.67 0.55 . 2.62 2.45 0.035 0.033 Straw w/Net Grass Lined
SCALE: 1" = 30'
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DISSIPATOR PAD SEEDBED PREPARATION: o
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CLASS B RIP RAP 46" -EI{� g28 a&
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COMMv pG 50 2 �0 . 7 --�- , .... AND MIX WITH SOIL.
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5. CONTINUE TILLAGE UNTIL A WELL-PULVERIZED FIRM REASONABLY
0- .741.,4,7,82' CHAIN UNIFORM SEEDBED IS PREPARED FOUR TO SIX INCHES DEEP.
55.- t, 'ems '8, • 4-"'- • _ £--..,., J..,...x• •a r LANK
6°2A,43 � ‘ � , a�' �' >;y�� � ��.� ,H� FENCE
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` °� y 1-- 8 � .- ,1 + 3§ CHANNEL #2 AND ABRUZZI RYE *(NURSE CROP) 25 LBS./ACRE �s04ac1e14e+a�•"®�
s. MAR. 1 - APR. 15 TALL FESCUE 200 LBS./ACRE /° it
GAG• a -'� 4�55 �' 4� p� x �1.ss r` 9 � \ 3 APR. 15- JUN. 30 HULLED COMMON BERMUDAGRASS 15 LBS./ACRE f/ r
GANG ' �""- GRK1tG x $43 a� es � a t m w !i ,
P "`� G1 I a4 ° �n 4
c
°" s ;
_----- / /
�-' a G G ��._� - -- ` ' I PERMANENT SEEDING - o
1,,,,,,,' / \ / P o ---------1- SLOPES (3.1 TO 2:1) , N
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/ \ / ,
-- / � ,/,
,� ��� �r AUG. 15-NOV.1 TALL FESCUE AND 200 LBS/ACRE: ,,c
.fot 9. 5 �r
--_� _� -« G + SERICEA LESPEDEZA (UNHULLED, UNSCARIFIED) 60 TO 70 LBS/ACRE'' Li j +., v- �,
�.�'` �g� Gd � �'' ; _ "l_11\\*:‘.---x\
NOV. 1-MAR.1 TALL FESCUE AND 200 LBS/ACRE o
` �` �/ � $� �.==- 6 CERICEA LESPEDEZA(UNHULLED, UNSCARIFIED) 60 TO 70 LBS/ACRE 1 O > ID
" rn `� sa � g• °} Ebo AND ABRUZZI RYE 25 LBS/ACRE ICIm ti �'
1�,c� : .� ,� +839 82 � 9�� moo �' °� MAR. 1-JUNE 1 TALL FESCUE 200 LBS/ACRE ,C worn .0
METAL ELU1E '� =-� �� o° �' �0M -o� ►°� IAND SERICEA LESPEDEZA(SCARIFIED) 40 TO 50 LBS/ACRE Xw+8�s'4 p3 8 k 4.4 �' p ��5. `� �t`` � � � 839 38� g MAR. 15-JUNE 30 WEEPING LOVEGRASS 10 LBS/ACRE z '` co _
W) 845 �s ��5.2 s4 EN \ 4> . /� - e'" "'-.""�.a '
a °° x838 72 0° as IX W N u d - o
s G � E) g4•g4s �000 o o v ,. �/ -- �6� 0, AND SCRICEA LESPEDEZA (SCARIFIED) 40 TO 50 LBS/ACRE '' , v U -
�ttG oPos� ''� ° Cg - ��° --'` MAR. 15-JUNE 30 HULLED COMMON BERMUDAGRASS 15 LBS/ACRE � y z o a
c Plat a4.s2 ° o �' 0� AND SERICEA LESPEDEZA SCARIFIED 40 LB / LBS/ACRE 19 Q. Q w �?Lri ow c� i
a 4 / y. �� •• /•/w„ ��,, : ., t TEMPORARY > ti
.d 001' aka \ `aaa O o'6 • ° ° , vi
t $ -Z I I SEEDING 0. Q o; w
/ ( I JUNE 1-SEPT. 1 TALL FESCUE 200 LBS/ACRE 0) Q 0 _ o
c�%i�, `� --- .-- �, ° 11`>' 'g 'y d t I\.,s,,,,:_-,,'�°'"� � �' E ,F G� = sX,., µ,, a t •� -'
q k �� -9 o ��;;� � ` ,, �§ ,. z AND BROWNTOP MILLET*(NURSE CROP) 35 LBS/ACRE �, o U
J� C --�" Q ✓ ✓ �5 'T .y� ® 'l�,p s ,t O r� G t 'k , 1 i --- $ 1 h� \n I ( *(NURSE ) c �L z
d. '�n `' 'C� .� Gfl x; e•1/' ,•-) • '. I V OR SORGHUM-SUDAN HYBRIDS NURSE CROP 30 LBS/ACRE Lti
\ Si 6;\::,,,) „„--•-•-' a -' ?`.. sr s� 84©.s+6 � lir //V � � CONSULT CONSERVATION ENGINEER OR SOIL CONSERVATION SERVICE FOR o
���. ,a g4 sP' a4��a , ` G 4 ;- ___ s / F -7' ADDITIONAL INFORMATION CONCERNING OTHER ALTERNATIVES FOR VEGETATION OF
aGG � ssv-/ ...„--\--. 4 ' GR ° � G �, / , e3 DENUDED AREAS. THE ABOVE VEGETATION RATES ARE THOSE WHICH DO WELL -0
Q / GG\AG i 4 Y) •` CCPsio. es /� P t $s UNDER LOCAL CONDITIONS; OTHER SEEDING RATE COMBINATIONS ARE POSSIBLE.
G�� G� a49a� ' ,� 1, , sac. G• Gl X 4 �, o
<cc ,, `°" s4 ',640 6I�w °6. s GG 4 04�� x i *NURSE CROP/TEMPORARY- RESEED ACCORDING TO OPTIMUM SEASON FOR DESIRED Y
vv.c5 \ „--"'"". -*-- 't,, VA' ,,,,,,,,,1:,,,,:/21/ !,..4110..!/•..' 2; PERMANENT VEGETATION. DO NOT ALLOW TEMPORARY COVER TO GROW OVER 12 IN
o p �E -co
1 o a ",�, ii �' .� GNP►'
HEIGHT BEFORE MOWING, OTHERWISE FESCUE MAY BE SHADED OUT.
114
1345.604 V14 \ k % (,-,, 4. ' .1\ \ \ T. \
.`
, i C°-10 i 13 \ . g.i 5 5)GE,„ f\ \ i, '13 o
0 0Is 7 \ (( , } \P \ e't- 1 - 1 \-7.z_ \ • TEMPORARY CHECK
QqI! \_ '''\ ' y l ?,�,e�rl' V o` DAM (TYP.)
O \ L7 i hg '6Z"o 1 �4�1
` G
n o , r ..` �=�r' S\,.0\�E CHANNEL #1 LEGEND z
G
\ $4 ', �¢ y TP TREE PROTECTION FENCE
Y SF SILT FENCE ��. W
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_ _ _ INLET PROTECTION -- -
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DESIGNED BY: JAC
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i DRAWN BY: JAC
0 _ _30 15 _ 0 30
a SCALE: 1 INCH=30 FEET
CHECKED BY: JBC
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`= DATE: 07/21/11
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0 43,938,c60
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cb�oO O°8co°o °
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6'MAX ° °o �'° o°� og° °
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I VARIABLE AS DIRECTED BY THE ENGINEER I
• ��.' BURY 6" OF UPPER EDGE OF
BURY WIRE FENCE AND HARDWARE CLOTH ! I
%i4 •� � � � MIN.12-1/2 GA
4 ►�, 0"6 INTERMEDIATE FILTER FABRIC IN TRENCH
MIN.10 GA. .�,� .� YMRES
LINE MIRES �►► +►i►1�►+ •
4•414 N14.4 s li FE10E FABRIC 4 +►..4
1',i *tI" ‘!. INSTAL LID TO SECOND �... s.�ls i +a
�►►�#I �'�+'1 ��►�1�"r► v�tr �+► "��#'���►'R 4' MIN. SILT FENCE SECTION VIEW
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in �■B ■M■■ ■ �11111111111
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IIMI'B■■■■■■ ■I 11■MI■M is Iw i u ■ 11111118 ■11asea■1NIIM IIw 11 l#BB>#1 ■i■■■■■ir ■■■.
I: it il■1I■■1■11"i�i■■■I■■isi i ■ • i1 ri^I FR0NT VIEW I=1 r►■■■�■�■Ih■1#111 1�i� 1 �i �11111� 1111 I I j i iIzI■■■■■■11■■■■ I 1 ! 1 �1111111�11111STEEL POST L�1TOP OF SILT FENCEII� f°
WOVEN MIRE FABRIC MUST BE AT LEAST 1' I���IM�����HM � �! 11111111111111111111111; ;Ill 111 �' i W
ABOVE THE TOP OF T1■N 1■I•■l 111.1u IE■■■1 ■ , :' �� ��Y 1■■■■i■■■■■■■■I ■■■►
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SILT FENCE CEOTEXTI E FABRIC •1111 #II■■■ 11 I# ■1 ■ • ■ tMBiOiHOhIH
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NOTE- I I THE WASHED STONE � � � � ,� t 1�
-USE SILT FENCE ONLY WHEN DRAINAGE AREA !s■i■■# ■■■■■.■1■ ■■i II �� �i�I � :- iB■ ■e,B
DOES NOT EXCEED 1/4 ACRE AND NEVER IN I SIDE • FOR REPAIR OF SILT 0
AREAS OF CONCENTRATED FLOW I FENCE FAILURES, USE0
-END OF SILT FENCE NEEDS TO BE TURNED UPHILL. «" • No.O ANCHOR7 WASHED ENOSL
.: FOR WHEN SILT fr
Cr: • GRADE FENCE IS PROTECTING a z
i►=11 '�W ;, CATCH BASIN. FRONT VIEW Lu
1 '+[I � 6"MIN.COVERa
: .I OVER SKIRT• BURY WIRE FENCE,
I 1
4. -it FILTER FABRIC, U
1E EXTEND MIRE 6"MIN.INTO TRENCH AND HARDWARE I
11 AND ANCHOR SKIRT AS Z
ail Ir11 DIRECTED BY ENGINEER• CLOTH IN TRENCH
�=?� STEEL FENCE POST i I
SIDE VIEW M2' APART
EN. MSX INTO SOLID
GROUND OZ <1 < < a
TEMPORARY SILT FENCE DETAIL SILT FENCE OUTLET DETAIL
NO SCALE
NO SCALE
S,z, e-X,:•o•.••a,•,,{ ®pis
/• o
s • ,w
ag ;fld��' •
•
Al'
TOP ELEVATION OF STORMWATER O 5'-1, '�,,� •......
pOeeR� a®'
------tligir--- -- ........._ostr________._...N____ OA
�� Ia l ltttio®
STONEWASHED $ 0011140.....�1 ��
DESIGN OF SPILLWAYS - -� A3 * y
EXISTING SLOPE 11��� ,,..,i�a>� �IiAlk l.�
DRAINAGE AREA WEIR LENGTH =11 =11 =11
(ACRES) (Fr) CLASS 1 RIP-RAP FILTER FABRIC 50' MIN. NOTES:
1 4.0 VARIES
2 6.0 BUT SUFFICIENT TO KEEP 1. PUT SILT FENCE OR TREE PROTECTION FENCE UPCD
3 8.0 _ SEDIMENT ON SITE TO ENSURE CONSTRUCTION ENTRANCE IS USED. CD
N
...1
Et
5 12•p SIDE 2 VIEW . IF CONSTRUCTION ON THE SITES ARE SUCH THAT
"`'`,:',.':::.";:•.. THE MUD IS NOT REMOVED BY THE VEHICLE TRAVEL- 14 ® r
1
DIMENSIONS SHOWN ARE MINIMUM
-, s,0-3" STONE TO BE USED'`_;„ 25' OR WIDTH OF INC OVER THE STONE, THEN THE TIRES OF THE
EXISTING SLOPES EXISTING ".,.;(SURGE STONE OR RAILROAD" VEHICLES MUST BE WASHED BEFORE ENTERING THE
ROADWAY PROPOSED STREET, PUBLIC ROAD. ® j
NOTE: BALLAST):'.,,.;':;, ,.;•,•r,` WHICHEVER IS 7
HEIGHT do WIDTH DETERMINED BY ..: .•�' ' - '.`,' GREATER. 3. IF A PROJECT CONTINUES TO PULL MUD AND DEBRIS
cr, -i a aj
1I=11- EXISTING TOPOGRAPHY AND .;,:•:' ,.. , . m ffi 11-II .. '.k...,;.ti,•...r': :z.
-II=11 SEDIMENT STORAGE REQUIRED. '•., ^.''' ., q.:;,.,,: ,.,' r..-:.:• ,. ON TO THE PUBLIC ROAD, THE GOVERNING AUTHORITY POND NOTESCI �' CO
• EMERGENCY SPILLWAY °' �,
• WILL CLEAN THE AREA AND INVOICE THE FINANCIALLY .I� I- � X �.,� w
VARIES - 1. SIDE SLOPES TO BE NO GREATER THAN 3.0: 1 TO AN ELEVATION z N �-
`' RESPONSIBLE PERSON AS INDICATED ON THE FINANCIAL MANNING = 0.035 (Lined with 6-in Rock Riprap) .1' - °
II�I1 KEY RIP RAP INTO THE DAM _ RESPONSIBILITY FORM.
II=11=I FOR STABILIZATION.
-n=11- II
OF 834.00 AND 2.0:1 THEREAFTER. w -
II=1i= �- PLAN SIDE SLOPE = 2.0:1 z - 0 0 1- • s"-1' ,I 2. PROTECTION TO BE PROVIDED AT THE OUTLET AND INLET BOTTOM WIDTH = 10 ft
d LiJ '�
�+ 1 `a` KEYED RIP RAP15' MIN. NEW CONSTRUCTION STRUCTURES.
® U I
W �,,•.«��"°•' • WEIR �'�� -' �
3. REINFORCED CONCRETE TO BE USED FOR ALL PIPE. CHANNEL SLOPE = 0.137 ft/ft
cr W JN. �w < X
'I:.,: 35' MIN.
a :: .: ,..'• -► : .':' '* .�;.''1 `6 :: ; ::3' EXISTING ROADWAY
I I 4. THE RISER TO HAVE TRASH RACKS, ANIT-FLOTATION DEVICES, NORMAL DEPTH = 0.34 ft 4. Q 0; w
n• a-11 II n WETTED PERIMETER = 11.52 ft °'"' 0
I 11 11-II 11- #57 WASHED STONE AND ANTI-VORTEX DEVICES.
-11=11= •. • ,�/ /� 12" MIN. CROSS-SECTIONAL AREA = 3.631 sqft lic 03 0 0 = o
1►- r, 2 z
' '•
�::..:.:'.>.,,.�.,.:.:•:'.,.:`.•;:•': �.:`'.";..::°....:~-;.:..:.::� • ''.:::..�::5`;_•�,::�.:::.� , 5. MAINTENANCE ACCESS TO BE PROVIDED. HYDRAULIC RADIUS = q �, �, o � � •
FRONT VIEW �._�� % S% • '� < .... �• • / , 6. VERTICAL SEDIMENT DEPTH MARKERS TO BE INSTALLED IN THE 0.315 ft ''tea m
��'� • • •���%�� FOREBAY AND IN THE PERMANENT POOL. DESIGN FLOW = 26.66 cfs (100-yr Event) LI E
/-� AVERAGE VELOCITY = 7.342 fps °
EXISTING SLOPE �1/ \ \-FABRIC UNDER STONE F
STEP SEQUENCE ` CROSS SECTION '4114
, o
U Z
TEMPORARY CHECK DAM CONSTRUCTION ENTRANCE DETAIL Y
cv NO SCALE NO SCALE WET DETENTION POND DISSIPATER SIZE _:.=on.,.:,. ,;:-
OPERATION AND MAINTENANCE PLAN:
APRON LENGTH=12', 6"0 CLASS B STONE 22" THICK
g OPERATION:
R
8 THE POND WILL BE INSPECTED ANNUALLY TO VERIFY IF THE FACILITY IS OPERATING AS DESIGNED
AND TO SCHEDULE ANY REQUIRED MAINTENANCE. THE FOLLOWING ITEMS WILL BE INCLUDED IN THE
ANNUAL INSPECTION:
2
w
-INSECT PLANTINGS 4C
-EMBANKMENT SETTLING, WOODY GROWTH, ANIMAL BURROWING, AND SIGNS OF PIPING Z
ca
-SIGNS OF SEEPAGE OR PIPING ON THE DOWNSTREAM FACE OF THE EMBANKMENT =a
-CONDITION OF GRASS COVER ON THE EMBANKMENT, BASIN FLOOR, AND PERIMETER OF BASIN
-EXCESSIVE EROSION OR SEDIMENTATION IN OR AROUND THE BASIN L I i- Q
c EMBANKMENT -RIPRAP DISPLACEMENT OR FAILURE W W 0
a.
t: EL 834.00 -PRINCIPAL OR EMERGENCY SPILLWAY TO CONFIRM THAT THEY MEET DESIGN PLANS FOR OPERATION Ct I- _
-OUTLET CONTROLS AND INLET CONTROLS mil z � H.
3 EMERGENCY SPILLWAY, EL 833.25
-STABILITY OF SLOPES •� 0 >- 0
-SAFETY FEATURES 4 U
NON-WOVEN FABRIC, 6" #57, STONE W
2% TOP OF BANK EL 838.00 6 RIP-RAP, 30 THICK
-ACCESS FOR MAINTENANCE EQUIPMENT LLl
°' RISER INLET II]
cn SLOPE -CLOGGING OF THE OUTFLOW PIPE W 0 O
_ -, v.
WITH TRASH RACK -SEDIMENT ACCUMULATION i_ J Q
° EL 832.25 A. CI MAINTENANCE: C
Y Cl- N0
co
10-YR ATTENTUATION POOL 0 1. CHECK DEBRIS AND LITTER AT INLETS AND OUTLETS AFTER EVERY STORM PRODUCING RUNOFF.
17, = 2. ROUTINE VEGETATION MANAGEMENT/MOWING. z
3. EVERY 6 MONTHS OR AFTER MAJOR STORMS: §
-SEDIMENT BUILDUP AND THE NEED FOR REMOVAL
-EROSION ALONG THE BANK AND THE NEED FOR RESEEDING OR STABILIZATION
w -EROSION AT THE INLETS AND OUTLETS
x
3
-SEEPA
1
GE THROUGH THE EMBANKMENT
4. THE FOLLOWNG PREVENTATIVE MAINTENANCE:
CD
-GRASS MAINTENANCE
CO
ct
NCDOT CONCRETE GRATED DROP INLET _
AND INVASIVE
�' 'TYPE B' -MOA NTENANCEOFNTROL WEEDS OF WETLAND VEGETATIONCIES
22
l's -
'fl, SEE NCDOT DETAIL 840.18
a_ WATER QUALITY POOL 0 -REMOVAL AND DISPOSAL OF TRASH AND DEBRIS
-REMOVAL AND DISPOSAL OF SEDIMENT
-ELIMINATION OF MOSIQUITO BREEDING HABITATS DESIGNED BY: JAC
co
28 LF 24"0 RCP © 0.75%
-INSPECTION OF WET DETENTION BASIN AND REPORTING OF RESULTS
-MAINTENANCE OF ACCESS DRAWN BY: JAC
30 15 0 31
N
PERMANENT POOL=831.00 0 I .. _ 6. .. ..
U CHECKED BY: JBC
Q 1 L_ PLANTING/SEEDING: SCALE: 1 INCH=30 FEET
a. 10 -11
BOTTOM EL 828.00 OUTLET
1. SEED EMBANKMENT AND SIDE SLOPES ACCORDING TO SEEDING SCHEDULE ON SHEET C5. DATE: 07/21/11
Z AQUATIC SCALE: N/A
co
SHELF EXTEND BASE 2' AND Sheet
FOREBAY FILL WITH CONCRETE INV. OUT=828.75
w FOR ANTI-FLOATATION r
LT
Q 5 of 5 sheets
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