HomeMy WebLinkAboutAgenda Report - October 2, 2013 G-02 PHAGENDA ITEM';'*I
CITY OF LODI
COUNCIL COMMUNICATION
• TM
AGENDA TITLE: Public Hearing to Receive Comments on and Consider Accepting City of Lodi's
Report on Water Quality Relative to Public Health Goals
MEETING DATE: October 2, 2013
PREPARED BY: Public Works Director
RECOMMENDED ACTION: Public hearing to receive comments on and consider accepting the
City of Lodi's Report on Water Quality Relative to Public Health
Goals.
BACKGROUND INFORMATION: Our water system complies with all of the health -based drinking
water standards and maximum contaminant levels as required by
the California Department of Health Services and the United States
Environmental Protection Agency. The attached report prepared by staff compares Lodi's drinking water
with the California Environmental Protection Agency's public health goals (PHGs) and with the United
States Environmental Protection Agency's maximum contaminant level goals (MCLGs). PHGs and
MCLGs are not enforceable standards and no action to meet them is mandated.
California Code of Regulations, Title 22, Section 116470, mandates that a report be prepared every three
years. The attached report is intended to provide information to the public, in addition to the Annual
Water Quality Report mailed to each customer in June 2013. On August 10, 2013, a public notice
appeared in the Lodi News Sentinel to inform any interested party of the Public Health Goals Report and
its availability. The report is also posted on the City's website.
The law also requires that a public hearing be held (which can be part of a regularly -scheduled public
meeting) for the purpose of accepting and responding to public comment on the report. A notice of public
hearing will be published in the Lodi News Sentinel. No additional actions are required or recommended.
FISCAL IMPACT: Not applicable
FUNDING AVAILABLE: Not applicable.
F. Wallyndelin
Public Works Director
Prepared by Larry Parlin, Deputy Public Works Director — Utilities
FWS/LP/pmf
Attachment
cc: Deputy Public Works Director —Utilities
Utilities Superintendent
Water Plant Chief Operator
Bartlam, qty Manager
K:\WP\COUNCIL\2013\PH PublicHealthGoalsReport.doc
9/23/2013
CITY OF LODI
PUBLIC WORKS DEPARTMENT
PUBLIC W0RK0Q-
Report
on Water Quality
Relative to Public Health Goals
2010-2012
September 2013
' 1
PUBLIC W0RK0Q-
Report
on Water Quality
Relative to Public Health Goals
2010-2012
September 2013
TABLE OF CONTENTS
SECTION
Page
BACKGROUND...............................................................................;.......................I........, ......,......1
PUBLIC HEALTH GOALS.. ......... ...............................................I.................. .......................1
CITY OF LODI WATER SOURCES.................................,.................................................,.......1
WATER QUALITY DATA CONSIDERED .................................................................... ............1
GUIDELINES FOLLOWED......................................................................................................................2
BEST AVAILABLE TREATMENT TECHNOLOGY AND COST ESTIMATES ............................. 2
CONSTITUENTS DETECTED THAT EXCEED A PHG OR A MCLG............................................. 2
ColiformBacteria ................. ............................. ...............................................................2
Trichloroethylene....................................................................................................................... 3
Dibromochloropropane............................................................................................................. 3
1,1,2,2 -Tetrachloroethylene . ....................................................................................... .. .. 4
1,2,3-Trichloropropane.............................................................................................. ............4
Arsenic............... ................. ............................... ........ ............................. ......... 5
Radium226............................................................ ........................................................................5
Radium228 ..... ........ ................................................................................................ .............6
Uranium........................................................................................................... ..... ............... 6
RECOMMENDATIONS FOR FURTHER ACTION.,......................................................................... 7
Appendix
Water Quality Table Relative to Public Health Goals
Attachments
1. MCLs, DLRs and PHGs for Regulated Drinking Water Contaminants
2. Health Risk Information for Public Health Goal Exceedance Reports
3. Cost Estimates for Treatment Technologies
Background
Provisions of the California Health and Safety Code (Reference No. 1) specify that larger (>10,000
service connections) water utilities prepare a special report every three years if their water quality
measurements have exceeded any Public Health Goals (PHGs). PHGs are non -enforceable goals
established by the Cal -EPA's Office of Environmental Health Hazard Assessment (OEHHA). The
law also requires that where OEHHA has not adopted a PHG for a constituent, the water suppliers
are to use the Maximum Contaminant Level Goals (MCLGs) adopted by USEPA. Only constituents
which have a California primary drinking water standard and for which either a PHG or MCLG has
been set are to be addressed.
There are a few constituents that are routinely detected in water systems at levels usually well below
the drinking water standards for which no PHG nor MCLG has been adopted by OEHHA or
USEPA. If a constituent was detected in the City's water supply between 2010 and 2012 at a level
exceeding an applicable PHG or MCLG, this report provides the information required by law.
Included is the numerical public health risk associated with the MCL and the PHG or MCLG, the
category or type of risk to health associated with each constituent, the best available treatment
technology that could be used to reduce the constituent level, and an estimate of the cost to
implement that treatment if it is appropriate and feasible.
What Are PHGs?
PHGs are set by the California Office of Environmental Health Hazard Assessment (OEHHA)
which is part of Cal -EPA, and are based solely on public health risk considerations. None of the
practical risk -management factors that are considered by the USEPA or the California Department
of Public Health (CDPH) in setting drinking water standards (MCLS) are considered in setting the
PHGs. These factors include analytical detection capability, available treatment technology, benefit
and cost. The PHGs are not enforceable and are not required to be met by any public water system.
MCLGs are the federal equivalent to PHGs.
City of Lodi Water Sources
The City of Lodi's water supply consists of both groundwater and surface water sources.
Approximately 70 percent of the water supplied to our customers originates from wells owned by
the City and the remainder of the City's drinking water is treated surface water produced through the
new Surface Water Treatment Facility (SWTF).
Water Quality Data Considered
All of the water quality data collected by our water system between 2010 and 2012 for purposes of
determining compliance with drinking water standards was considered. This data was summarized
in our 2010, 2011, and 2012 Annual Water Quality Reports which were mailed to all customers
before July 1St each year. The triennial lead and copper monitoring for 2012 was deferred by CDPH
to 2013 and is not included in this report.
Water Quality Report Relative to PHG 1 of 7 September 2013
Guidelines Followed
The Association of California Water Agencies (ACWA) formed a workgroup that prepared
guidelines that were used in the preparation of this report.
Best Available Treatment Technology and Cost Estimates
Both the USEPA and CDPH adopt what are known as Best Available Technologies (BATs) which
are the best known methods of reducing contaminant levels to the MCL. Costs can be estimated for
implementing such technologies. Since many PHGs and all MCLGs are set much lower than the
MCL, it is not always possible or feasible to determine what treatment is needed to further reduce a
constituent down to or near the PHG or MCLG, many of which are set at zero. Estimating the costs
to reduce a constituent to zero is difficult, if not impossible. It is not possible to verify by analytical
means that the level has been lowered to zero. In some cases, installing treatment to further reduce
very low levels of one constituent may have adverse effects on other aspects of water quality.
Constituents Detected That Exceed a PHG or a MCLG
The following is a discussion of constituents that were detected in one or more of our drinking water
sources at levels above the PHG, or if no PHG, above the MCLG.
Coliform Bacteria
In 2010-12, we collected 3,141 samples from our distribution system for coliform analysis. Of these
samples, 0.22% was positive for coliform bacteria. In 2010-12 a maximum of 3.4% (April 2011) of
these samples were positive for one month.
The MCL for coliform is 5% positive samples of all samples per month and the MCLG is zero. The
reason for the coliform drinking water standard is to minimize the possibility of the water containing
pathogens which are organisms that cause waterborne disease. Because coliform is only an
indicator of the potential presence of pathogens, it is not possible to state a specific numerical health
risk. While U.S. EPA normally sets MCLGs "at a level where no known or anticipated adverse
effects on persons would occur" they indicate that they cannot do so with coliforms.
Coliform bacteria are organisms that are found just about everywhere in nature and are not generally
considered harmful. They are used as an indicator because of the ease for monitoring and analysis.
If a positive sample is found, it indicates a potential problem that needs to be investigated and
follow up sampling is done. It is not at all unusual for a system to have an occasional positive
sample. It is difficult, if not impossible, to assure that a system will never get a positive sample. A
further test that is performed on all total coliform positive results is for fecal coliform or E. coli.
There were no positive fecal coliform or E. coli results in 20010-12.
The City adds chlorine to all City water sources to assure that the water served is microbiologically
safe. The chlorine residual levels are carefully controlled to provide the best health protection
without causing the water to have undesirable taste and odor or increasing the disinfection
byproduct level. This careful balance of treatment processes is essential to continue supplying our
customers with safe drinking water.
Water Quality Report Relative to PHG 2 of 7 September 2013
Trichloroethylene (TCE)
The PHG for TCE is 1.7 micrograms per liter (µg/l, or parts per billion). The MCL or drinking
water standard for TCE is 5 gg/L. We detected TCE at levels above the PHG but not exceeding the
MCL in the discharge from 1 of the 26 City wells used in 2010-12. The average value for the City
wells can be found in the Water Quality Report (Appendix).
The category of health risk associated with TCE, and the reason that a drinking water standard was
adopted for it, is that the people who drink water containing TCE above the MCL throughout their
lifetime could theoretically experience an increased risk of getting cancer. CDPH says that
"Drinking water which meets this standard (the MCL) is associated with little to none of this risk
and should be considered safe with respect to TCE." (CDPH Blue Book of drinking water law and
regulations, Section 64468.2, Title 22, CCR.) The Best Available Technology for TCE to lower the
level below the MCL is either Granular Activated Carbon or Packed Tower Aeration.
The estimated cost to install such a treatment system on one City well and enhance the capacity on
one City well with an existing treatment system that would reliably reduce the TCE level to below
1.7 µg/L would be approximately $490,000 and require annual operation and maintenance costs of
approximately $77,000 per year. This would result in an estimated increased cost to each customer
of approximately $5 per year.
Dibromochloropropane (DBCP)
The PHG for DBCP is 1.7 nanograms per liter (ng/L or parts per trillion). The MCL for DBCP is
200 ng/L. We detected DBCP at levels not exceeding the MCL in the discharges from 12 of the 26
City wells used in 2010-12. City Well No. 6 was taken out of service and placed in standby
(January 2012) when the average analysis exceeded the MCL. Since then, the City has taken
necessary steps to add Granulated Activated Carbon (GAC) vessels for treatment. This treatment
was funded by Lodi's settlement agreement with DBCP manufactures and construction of the new
treatment is near completion. The average value for these City wells can be found in the Water
Quality Report (Appendix).
The category for health risk associated with DBCP, and the reason that a drinking water standard
was adopted for it, is the people who drink water containing DBCP above the MCL throughout their
lifetime could theoretically experience an increased risk of getting cancer. CDPH says that
"Drinking water which meets this standard (the MCL) is associated with little to none of this risk
and should be considered safe with respect to DBCP." (CDPH Blue Book of drinking water law and
regulations, Section 64468.3, Title 22, CCR.) The numerical health risk for an MCLG of zero is
zero.
The Best Available Technology for DBCP to lower the level below the MCL is either Granular
Activated Carbon or Packed Tower Aeration. To attempt to maintain the DBCP levels at zero,
Granular Activated Carbon Treatment Systems with longer empty bed contact times and more
frequent carbon change -outs would likely be required.
Water Quality Report Relative to PHG 3 of 7 September 2013
The estimated cost to install such a treatment system on 12 City wells and enhance capacities on six
City wells with existing treatment systems that would reliably reduce the DBCP level to zero would
be approximately $5.4 million. The increased annual operation and maintenance costs would be
approximately $797,000 per year. This would result in an estimated increased cost to each customer
of approximately $42 per year. (Note: This increased cost may not be reimbursable under the terms
of Lodi's settlement agreement with the DBCP manufacturers.)
1,1,2,2 -Tetrachloroethylene (PCE)
The PHG for PCE is 0.06 micrograms per liter (gg/L or parts per billion). The MCL or drinking
water standard for PCE is 5 µg/L. We detected PCE at levels not exceeding the MCL in the
discharges from three of the 26 City wells used in 2010-12. The average value for these City wells
can be found in the Water Quality Report (Appendix).
The category of health risk associated with PCE, and the reason that a drinking water standard was
adopted for it, is the people who drink water containing PCE above the MCL throughout their
lifetime could theoretically experience an increased risk of getting cancer. CDPH says that
"Drinking water which meets this standard (the MCL) is associated with little to none of this risk
and should be considered safe with respect to PCE." (CDPH Blue Book of drinking water law and
regulations, Section 64468.2, Title 22, CCR.)
The Best Available Technology for PCE to lower the level below the MCL is either Granular
Activated Carbon or Packed Tower Aeration. Since the PCE level in these three City wells is
already below the MCL, a Granular Activated Carbon Treatment System with larger vessels would
likely be required to attempt to keep PCE levels below the PHG.
The estimated cost to install such a treatment system on three City wells that would reliably reduce
the PCE level to the PHG of 0.06 gg/L would be approximately $1.5 million and require annual
operation and maintenance costs of approximately $180,000 per year. This would result in an
estimated increased cost to each customer of approximately $14 per year.
1,2,3-Trichloropropane (1,2,3 -TCP)
The PHG for 1,2,3 -TCP is 0.0007 micrograms per liter (µg2 or parts per billion). There is no
California or federal Maximum Contaminant Level (MCL) for 1,2,3 -TCP. The California
Notification Level for 1,2,3 -TCP is set at 0.005 µg/L, the detection limit for the purposes of
reporting Detectable Level Required (DLR). Notification levels are health -based advisory levels
established by CDPH for chemicals in drinking water that lack MCLs. CDPH advises "If a
chemical concentration is greater than its notification level in drinking water that is provided to
consumers, CDPH recommends that the utility inform its customers and consumers about the
presence of the chemical, and about health concerns associated with exposure to it". We detected
1,2,3 -TCP at levels exceeding the PHG in the source water from six of the 26 City wells used in
2010-12. The average value for these City wells can be found in the Water Quality Report
(Appendix).
Currently, there is no MCL for 1,2,3 -TCP. The category for health risk associated with 1,2,3 -TCP,
and the reason that a drinking water standard (PHG) was adopted for it, is the people who drink
Water Quality Report Relative to PHG 4 of 7 September 2013
water containing 1,2,3 -TCP throughout their lifetime could theoretically experience an increased
risk of getting cancer.
An estimate of the best approach for 1,2,3 -TCP removal in Lodi is not necessary at this time.
Arsenic
The PHG for Arsenic is 0.004 micrograms per Liter (µg/L or parts per billion). The MCL or
drinking water standard for arsenic is 10 pg/L. There were arsenic levels detected at levels not
exceeding the MCL in discharges from 26 of the 26 City wells and the water treatment plant used in
2010-12. The values for these water sources can be found in the Water Quality Report (Appendix).
Arsenic is a naturally occurring element found in many types of rocks and soils. Leaching of these
deposits is the primary source of arsenic in this area. Some people who drink water containing
arsenic in excess of the MCL over many years may experience skin damage or circulatory system
problems and may have an increased risk of getting cancer. The PHG of 0.004 µg/L for arsenic is
far below the Detection Limit Requirement (DLR) of 2 µg/L for arsenic. The DLR is the level that
can be reliably determined by current laboratory methods.
The Best Available Treatment (BAT) for arsenic removal is dependent on the water chemistry of the
source to be treated. While research into new methods of removing arsenic continues, the current
recommendations include:
• Activated Alumina
• Coagulation / Filtration
• Lime Softening
• Reverse Osmosis
All of the above -listed methods are expensive and have a concentrated residual, which requires safe
disposal. An estimate of the best approach for arsenic removal in Lodi is not necessary at this time.
Radium 226
The PHG for Radium 226 is 0.05 pCi/L and MCL for Radium 226 plus Radium 228 is 5 pCi/L.
Testing for radium is not required unless the level of gross alpha particle activity detected exceeds 5
pCi/L. We detected Radium 226 at levels not exceeding the MCL in the discharges from two of the
26 City wells used in 2010-12. The average value for this City well can be found in the Water
Quality Report (Appendix).
The category of health risk associated with Radium 226 is carcinogenicity. People who drink water
containing Radium 226 particles above the MCL throughout their lifetime could experience an
increased risk of getting cancer. The numerical health risk for Radium 226 based on the PHG is 1 x
10-6. This means one excess cancer case per million population. The BAT to lower the level of
Radium 226 below the MCL is reverse osmosis, although it is not known if the technology is
feasible of achieving the PHG level of 0.06 pCi/L.
The estimated annual cost to install and operate a reverse osmosis systems at all of the City's wells
would be approximately $2.60 per 1,000 gallons of treated water, which includes annualized cost of
construction plus operation and maintenance costs. This translates into an estimated additional
Water Quality Report Relative to PHG 5 of 7 September 2013
annual cost of approximately $35 per service connection per year for the life of the treatment
system.
Radium 228
The PHG for Radium 228 is 0.019 pCi/L and MCL for Radium 226 plus Radium 228 is 5 pCi/L.
Testing for radium is not required unless the level of gross alpha particle activity detected exceeds 5
pCi/L. We detected Radium 228 at levels not exceeding the MCL in the discharges from two of the
26 City wells used in 2010-12. The average value for this City well can be found in the Water
Quality Table (Appendix D).
The category of health risk associated with Radium 228 is carcinogenicity. People who drink water
containing Radium 228 particles above the MCL throughout their lifetime could experience an
increased risk of getting cancer. The numerical health risk for Radium 228 based on the PHG is 1 x
10-6. This means one excess cancer case per million population. The BAT to lower the level of
Radium 228 below the MCL is reverse osmosis, although it is not known if the technology is
feasible of achieving the PHG level of 0.019 pCi/L.
The estimated annual cost to install and operate a reverse osmosis systems at all of the City's wells
would be approximately $2.60 per 1,000 gallons of treated water, which includes annualized cost of
construction plus operation and maintenance costs. This translates into an estimated additional
annual cost of approximately $35 per service connection per year for the life of the treatment
system.
Uranium
The PHG for Uranium is 0.43 picocuries per liter (pCi/L). The MCL or drinking water standard for
Uranium is 20 pCi/L. There was Uranium detected at levels not exceeding the MCL in discharges
from 15 of the 25 City wells used in 2010-12. The values for these water sources can be found in
the Water Quality Report (Appendix).
CDPH, which sets drinking water standards, has determined that total Uranium is a health concern at
certain levels of exposure. This radiological constituent is a naturally occurring contaminant in
some groundwater and surface water supplies. This constituent has been shown to cause cancer in
laboratory animals such as rats and mice when the animals are exposed at high levels over their
lifetimes. Constituents that cause cancer in laboratory animals also may increase the risk of cancer
in humans who are exposed over long periods of time.
BATs for removal of Uranium from drinking water are: Ion Exchange - Reverse Osmosis or Lime
Softening. These methods are expensive and require disposal of a waste stream, which would
contain concentrated radio nucleotides. The estimated cost to install such a treatment system on
fifteen City wells that have historically exceeded the PHG which would reliably reduce the Uranium
level to the PHG of 0.43 pCi/L would be approximately $19.6 million and require annual operation
and maintenance at a cost of approximately $820,000 per year. This would result in an estimated
increased cost for each customer of approximately $121 per year.
Water Quality Report Relative to PHG 6 of 7 September 2013
Recommendations for Further Action
The drinking water quality of the City of Lodi Public Water System meets all State of California,
CDPH and U.S. EPA drinking water standards set to protect public health. To further reduce the
levels of the constituent's identified in this report that are already below the Maximum Contaminant
Levels established by the State and Federal government, additional costly treatment processes would
be required.
The effectiveness of the treatment processes to provide significant reductions in constituent levels at
these already low values is uncertain. The theoretical health protection benefits of these further
reductions are not clear and may not be quantifiable. Therefore, staff is not recommending further
action at this time.
This report was completed by City of Lodi Public Works Department staff. Any questions relating
to this report should be directed to:
Larry Parlin, Deputy Public Works Director, 1331 South Ham Lane, Lodi, CA, 95242 or call
(209) 333-6800, extension 2661.
Andrew Richle, Chief Plant Operator, 2001 West Turner Road, Lodi, CA, 95242 or call
(209) 333-6800, extension 2690.
Water Quality Report Relative to PHG 7 of 7 September 2013
Appendix
Appendix
City of Lodi Water Quality Report Relative to Public Health Goals
Trichloroethylene (TCE) Result MCL PHG or (MCLG)
Well,2 2 ug/L 5 ug/L 1.7 ug/L
Dibromochloropropane (DBCP)
Well 1R
56 ng/L
200 ng/L
17 ng/L
Well 4R
37 ng/L
200 ng/L
17 ng/L
Well 6R
476 ng/L
200 ng/L
17 ngfL
Well 8
178 ng/L
200 ng/L
17 ng/L
Well 13
50 ng/L
200 ng/L
17 ng/L
Well 14
40 ng/L
200 ng/L
17 ng/L
Well 16
30 ng/L
200 ng/L
17 ng/L
Well 17
177 ng/L
200 ng/L
17 ng/L
Well 19
100 ng/L
200 ng/L
17 ng/L
Well 22
40 ng/L
200 ng/L
17 ng/L
Well 23
20 ng/L
200 ng/L
17 ng/L
Well 28
95 ng/L
2DO ng/L
17 ng/L
Perchloroethylene (PCE)
4.0 pCiA
20 pCUL
0.43 pCi/L
Well 6R
2.43 ug/L
6 ug/L
0,06 ug/L
Well 8
0.66 ug/L
6 ug/L
0.06 ug/L
Well 12
0.88 ug/L
6 ug/L
0.06 ug/L
Arsenic
7.4 pCiA
20 pCUL
0.43 pCUL
Well 1R
5.6 ug/L
10 ug/L
0.004 ugiL
Well 2
3,4 ugiL
10 ug/L
0.004 ug/L
Well 3R
5.0 ug/L
10 ug/L
0.004 ug/L
Well 4R
4.0 ug/L
10 ug/L
0.004 ug/L
Well 5
4.4 ug/L
10 ug/L
0.004 ug/L
Well 6R
2.2 ug/L
10 ug/L
0.004 ug/L
Well 7
4.5 ug/L
10 ug/L
O.OD4 ug/L
Well 9
3.7 ugiL
10 ug/L
0.004 ug/L
Well 10C
4.3 ug/L
10 ug/L
0.004 ug/L
Well 11 R
5,5 ug/L
10 ug/L
0,004 ugiL
Well 12
3.6 ug/L
10 ugiL
0.004 ug/L
Well 13
8.7 ug/L
10 ug/L
0.004 ug/L
Well 14
3.6 ug/L
10 ug/L
0.004 ug/L
Well 15
4.6 ug/L
10 ug/L
0,004 ug/L
Well 16
3.3 ug/L
10 ug/L
0.004 ug/L
Well 17
3.9 ug/L
10 ug/L
0,004 ug/L
Well 18
2.4 ug/L
10 ug/L
0.004 ug/L
Notes:
'MCL for Radium 226 plus 228 is 5.0 pCUL
-Source Water Sample
Arsenic (Cont)
Result
MCL
PHG or (MCLG)
Well 19
2.9 ug/L
10 ug/L
0.004 u91L
Well 20
3.2 ug/L
10 ugiL
0.004 ug/L
We1121
2.5 ugiL
10 ug/L
0.004 ugiL
Well 22
2.4 ug/L
10 ug/L
0.004 ug/L
Well 23
2.7 ug/L
10 ugiL
0.004 ug/L
Well 24
6.1 ug/L
10 ug/L
0.004 ug/L
Well 25
6.2 ug/L
10 ugiL
0.004 ug/L
Well 26
9.1 ug/L
10 ug/L
0.004 ug/L
Well 28
6.2 ug/L
10 ug/L
0,004 ug/L
Surafce Water Plant
0.4 ug/L
10 ug/L
0.004 ug/L
Uranium
Well 2
4.0 pCiA
20 pCUL
0.43 pCi/L
Well 6R
11.2 pCiA
20 pCUL
0.43 pGVL
Well 8
12.5 pCVI
20 pCUL
0.43 pCUL
Well 9
5.2 pCi/I
20 pCUL
0.43 pCUL
Well 12
7.4 pCiA
20 pCUL
0.43 pCUL
Well 13
1.5 pCill
20 pCUL
0.43 pCUL
Well 14
4.0 pCiA
20 pCi/L
0.43 pCi/L
Well 16
4.7 pCiA
20 pCUL
0.43 pCUL
Well 17
4.5 pCiA
20 pCIIL
0.43 pCUL
Well 19
4.6 pCiA
20 pQIL
0.43 pCUL
Well 20
2,5 pCUI
20 pCUL
043 pCi/L
Well 21
1.0 PCO
20 pCUL
0.43 pCUL
Well 22
9.5 pCUI
20 pCi/L
0.43 pCUL
Well 23
7.7 pCVI
20 pCi/L
0.43 pCUL
Radium 226
Well 8
0.25 pCUL
-5A pCUL
0.05 pCUL
Well 20
0.05 pCUL
-5.0 pCi/L
0.05 pCUL
Radium 228
Well 8
0.075 pCUL
-5.0 pCUL
0.019 pCi/L
Well 20
0.116 pCUL
-5.0 pCi/L
0.019 pCUL
**1,2,3 Trichoropropane
Well 6R
0,005 ug/L
NIA
0.0007 ug/L
Well 13
0.026 ug/L
N/A
0.0007 ug/L
Well 16
0.004 ug/L
NIA
0.0007 ug/L
Well 18
0:009 ug/L
N/A
0.0007 ug/L
Well 20
0.015 ug/L
N/A
0.0007 ug/L
Well 21
0.003 ug/L
NIA
0.0007 uq&
F., rq P., q IT"Tor, m
ATTACHMENT No. 1
2013 PHG Triennial Report: Calendar Years 2010-2011-2012
This table includes:
• CDPH's maximum contaminant levels (MCLs)
• CDPH's detection limits for purposes of reporting (DLRs)
•_ Public health nooals (PHGs) from the Office of Environmental Health Hazard Assessmgnt (OEHHAI
• PHGs for NDMA and 1,2,3-Trichloropropane (1,2,3 -TCP is unregulated) are at the bottom of this table
• The federal MCLG for chemicals without a PHG, microbial contaminants, and the DLR for 1,2,3 -TCP
Constituent
MCL
DLR
PHG or
MCLG
Date of PHG
Chemicals with MCLs in 22 CCR §64431—Inorganic Chemicals
Aluminum 1 0.05
0.6
2001
Antimony 0.006 0.006
0.02
1997
Arsenic 0.010 0.002
0.000004
2004
Asbestos (MFL = million fibers per liter; for fibers 7 MFL 0.2 MFL
>10 microns Ion
7 MFL
2003
Barium 1 0.1
2
2003
Beryllium 0.004 0.001
0.001
2003
Cadmium 0.005 0,001
0.00004
2006
Chromium, Total - OEHHA withdrew the 1999
0.0025 m /L PHG in Nov 2001 0.05 0.01
(0.100)
Chromium, Hexavalent (Chromium -6) - MCL to be
established - currently regulated under the total — 0.001
chromium MCL
0.00002
2011
Cyanide 0.15 0.1
0.15
1997
Fluoride 2 0.1
1
1997
Mercury (inorganic) 0.002 0.001
0.0012
1999 (rev2005)*
Nickel 0.1 0.01
0.012
2001
Nitrate (as NO3) 45 2
45
1997
Nitrite (as N) 1 as N 0.4
1 as N
1997
Nitrate + Nitrite 10 as N 0.4
10 as N
1997
Perchlorate 0.006 0.004
0.006
2004
Selenium 0.05 0.005
0.03
2010
Thallium 0,002 0.001
0.0001
1999 (rev2004)
Copper and Lead, 22 CCR §64672.3
Values referred to as MCLs for lead and copper are not actually MCLs; instead, they are called 'Action Levels"
under the lead and copper rule
Copper 1.3 0.05
0.3
2008
Lead 0.015 0.005
0.0002
2009
1 of 4
ATTACHMENT No. 1
Constituent
MCL
DLR
PHG or
MCLG
Date of PHG
Radionuclides with MCLS in 22 CCR §64441 and §64443 -Radioactivity
[units are picocuries per titer (pCi/L), unless otherwise stated; n/a = not applicable]
Gross alpha particle activity - OEHHA concluded
in 2003 that a PHG was not practical
15
3
(zero)
We
Gross beta particle activity - OEHHA concluded i
2003 that a PHG was not practical
4 mrem/yr
4
(zero)
n/a
Radium -226
-
1
0.05
2006
Radium -228
-
1
0.019
2006
Radium -226 + Radium -228
5
--
(zero)
-
Strontium -90
8
2
0.35
2006
Tritium
20,000
1,000
400
2006
Uranium 1
20
1 1
1 0.43
1 2001
Chemicals with MCLS in 22 CCR §64444 -Organic Chemicals
(a) Volatile Organic Chemicals (VOCs)
Benzene
0.001
0.0005
0.00015
2001
Carbon tetrachloride
0.0005
0.0005
0.0001
2000
1,2 -Dichlorobenzene
0.6
0.0005
0.6
1997 (rev2009)
1,4 -Dichlorobenzene (p -DCB)
0.005
0.0005
0.006
1997
1,1-D'ichloroethane (1,1 -DCA)
0.005
0.0005
0.003
2003
1,2-Dichloroethane (1,2 -DCA)
0.0005
0.0005
0.0004
1999 (rev2005)
1,1-Dichloroethylene (1,1-DCE)
0.006
0.0005
0.01
1999
cis-1,2-Dichloroethylene
0.006
0.0005
0.1
2006
trans-1,2-Dichloroethylene
0.01
0.0005
0.06
2006
Dichloromethane (Methylene chloride)_
0.005
0.0005
0.004
2000
1,2-Dichloropropane
0.005
0.0005
0.0005
1999
1,3-Dichloropropene
0.0005
0.0005
0.0002
1999 (rev2006)
Ethylbenzene
0.3
0.0005
0.3
1997
Methyl tertiary butyl ether (MTBE)
0.013
0.003
0,013
1999
Monochiorobenzene
0.07
0.0005
0.2
2003
Styrene
0.1
0.0005
0.0005
2010
1,1,2,2 -Tetrachloroethane
0.001
0.0005
0.0001
2003
Tetrachloroethylene (PCE)
0.005
0.0005
0.00006
2001
Toluene
0.15
0.0005
0.15
1999
1,2,4-Trichlorobenzene
0.005
0.0005
0.005
1999
1,1,1 -Trichloroethane (1,1,1 -TCA)
0.2
0.0005
1
2006
1,1,2 -Trichloroethane (1,1,2 -TCA)
0.005
0,0005
0.0003
2006
Trichloroethylene (TCE)
0.005
0.0005
0.0017
2009
Trichlorofluoromethane (Freon 11)
0.15
0.005
0.7
1997
1,1,2-Trichloro-1,2,2-Trifluoroethane (Freon 113)
1.2
0.01
4
1997 (rev2011)
Vinyl chloride
1
0.0005
0.0005
0.00005
2000
Xylenes
1.75
0.0005
1.8
1997
2 of 4
ATTACHMENT No. 1
Constituent
MCL
DLR
PHG or
MCLG
Date of PHO
Chemicals with MCLS in 22 CCR §64444 -Organic Chemicals
(b) Non -Volatile Synthetic Organic Chemicals (SOCs)
Alachlor
0.002
0.001
0.004
1997
Atrazine
0.001
0.0005
0.00015
1999
Bentazon
0.018
0.002
0.2
1999 (rev2009)
Benzo(a)pyrene
0.0002
0.0001
0.000007
2010
Carbofuran
0.018
0.005
0.0017
2000
Chlordane
0.0001
0.0001
0.00003
1997 (rev2006)
Dalapon
0.2
0.01
0.79
1997 (rev2009)
1,2-Dibromo-3-ehloropropane (DBCP)
0.0002
0.00001
0.0000017
1999
2,4-Dichlorophenoxyacetic acid (2,4-D)
0.07
0.01
0.02
2009
Di(2-ethylhexyl)adipate
0.4
0.005
0.2
2003
Di(2-ethylhexyl)phthalate (DEHP)
0.004
0.003
0.012
1997
Dinoseb
0.007
0.002
0.014
1997 (rev2010)
Diquat
0.02
0.004
0.015
2000
Endrin
0.002
0.0001
0.0018
1999 (rev2008)
Endothal
0.1
0.045
0.58
1997
Ethylene dibromide (EDB)
0.00005
0.00002
0.00001
2003
Glyphosate
0.7
0.025
0.9
2007
Heptachlor
0.00001
0.00001
0.000008
1999
Heptachlor epoxide
0.00001
0.00001
0.000006
1999
Hexachlorobenzene
0.001
0.0005
0.00003
2003
Hexachlorocyclopentadiene
0.05
0.001
0.05
1999
Lindane
0.0002
0.0002
0.000032
1999 (rev2005)
Methoxychlor
0.03
0.01
0.00009
2010
Molinate
0.02
0.002
0.001
2008
Oxamyl
0.05
0.02
0.026
2009
Pentachlorophenol
0.001
0.0002
0.0003
2009
Picloram
0.5
0.001
0.5
1997
Polychlorinated biphenyls (PCBs)
0.0005
0.0005
0.00009
2007
Simazine
0.004
0.001
0.004
2001
2,4,5 -TP (Silvex)
0.05
0.001
0.025
2003
2,3,7,8-TCDD (dioxin)
3x10'
5x10-9
5x10-11
2010
Thiobencarb
0.07 1
0.001 1
0.07 1
2000
Toxaphene
0.003 1
0.001 1
0.00003 1
2003
3 of 4
ATTACHMENT No. 1
Constituent
MCL
DLR
or
PHG MGLG
Date of PHG
Chemicals with MCLS in 22 CCR §64533—Disinfection Byproducts
Total Trihalomethanes
0.080 --
--
Bromodichloromethane
-- 0.0010
(zero)
—
Bromoform
-- 0.0010
(zero)
--
Chloroform _
-- 0.0010
(0.07)
--
Dibromochloromethane
-- 0.0010
(0.06)
--
Haloacetic Acids five HAAS
0.060 --
--
--
Monochloroacetic Acid
-- 0.0020
(0.07)
—
Dichloroacetic Adic
-- 0.0010
(zero)
Trichloroacetic Acid
— 0.0010
(0.02)
—
Monobromoacetic Acid
-- 0.0010
—
--
Dibromoacetic Acid
— 0.0010
Bromate
0.0050 or
0.010 0.0010a
0.0001
2009
Chlorite
1.0 0.020
0.05
2009
Microbiological Contaminants (TT = Treatment Technique)
Coliform % positive samples
% 5
(zero)
Cryptosporidium**
TT
(zero)
Giardia lamblia**
TT
(zero)
Legionella**
TT
(zero)
Viruses**
TT
(zero)
Chemicals with PHGs established in response to CDPH requests.
These are not currently regulated drinking water contaminants.
N-Nitrosodimethylamine (NDMA)
1 0.000003
2006
1,2 3-Trichloro ro ane
-- 0.000005
1 0.0000007
2009
Notes:
a CDPH will maintain a 0.0050 mg/L DLR for bromate to accommodate laboratories that are using EPA Method
300.1. However, laboratories using EPA Methods 317.0 Revision 2.0, 321.8, or 326.0 must meet a 0.0010 mg/L
MRL for bromate and should report results with a DLR of 0.0010 mg/L per Federal requirements.
*OEHHA's review of this chemical during the year indicated (rev20XX) resulted in no change in the PHG
** Surface water treatment = TT
4 of 4
Attachment No. 2
Health Risk Information for
Public Health Goal Exceedance Reports
Prepared by
Office of Environmental Health Hazard Assessment
California Environmental Protection Agency
February 2013
Under the Calderon -Sher Safe Drinking Water Act of 1996 (the Act), water utilities are
required to prepare a report every three years for contaminants that exceed public
health goals (PHGs) (Health and Safety Code Section 116470 (2)[b]). The numerical
health risk for a contaminant is to be presented with the category of health risk, along
with a plainly worded description of these terms. The cancer health risk is to be
calculated at the PHG and at the California maximum contaminant level (MCL). This
report is prepared by the Office of Environmental Health Hazard Assessment (OEHHA)
to assist the water utilities in meeting their requirements.
PHGs are concentrations of contaminants in drinking water that pose no significant
health risk if consumed for a lifetime. PHGs are developed and published by OEHHA
(Health and Safety Code Section 116365) using current risk assessment principles,
practices and methods.
Numerical health risks. Table 1 presents health risk categories and cancer risk values
for chemical contaminants in drinking water that have PHGs.
The Act requires that OEHHA publish PHGs based on health risk assessments using
the most current scientific methods. As defined in statute, PHGs for non -carcinogenic
chemicals in drinking water are set at a concentration "at which no known or anticipated
adverse health effects will occur, with an adequate margin of safety." For carcinogens,
PHGs are set at a concentration that "does not pose any significant risk to health."
PHGs provide one basis for revising MCLs, along with cost and technological feasibility.
OEHHA has been publishing PHGs since 1997 and the entire list published to date is
shown in Table 1.
Table 2 presents health risk information for contaminants that do not have PHGs but
have state or federal regulatory standards. The Act requires that, for chemical
contaminants with California MCLs that do not yet have PHGs, water utilities use the
Attachment No. 2
federal maximum contaminant level goal (MCLG) for the purpose of complying with the
requirement of public notification. MCLGs, like PHGs are strictly health based and
include a margin of safety. One difference, however, is that the MCI -Gs for carcinogens
are set at zero because the United States Environmental Protection Agency (U.S. EPA)
assumes there is no absolutely safe level of exposure to them. PHGs, on the other
hand, are set at a level considered to pose no significant risk of cancer; this is usually a
no more than one -in -a -million excess cancer risk (1x10-6) level for a lifetime of
exposure. In Table 2, the cancer risks shown are based on the U.S. EPA's evaluations.
For more information on health risks: The adverse health effects for each chemical
with a PHG are summarized in each PHG technical support document. These
documents are available on the OEHHA Web site (http://www.oehha.ca.gov). Also,
U.S. EPA has consumer and technical fact sheets on most of the chemicals having
MCLs. For copies of the fact sheets, call the Safe Drinking Water Hotline at
1-800-426-4791, or explore the U.S. EPA Ground Water and Drinking Water web page
at http://water.epa.gov/drink/.
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
Based on the OEHHA PHG technical support document unless otherwise specified. The categories are
the hazard traits defined by OEHHA for California's Toxics Information Clearinghouse (online at:
httn://oehha.ca.gov/Multimediatoreen/od`f/GC ResatextO11912.adf1.
mg1L = milligrams per liter of water or parts per million (ppm)
S Cancer Risk = Upper estimate of excess cancer risk from lifetime exposure. Actual cancer risk may be
lower or zero: 1x10.5 means one excess cancer case per million people exposed.
4 MCL = maximum contaminant level.
5 NA = not applicable. Risk cannot be calculated. The PHG is set at a level that is believed to be without
any significant public health risk to individuals exposed to the chemical over a lifetime.
5 MFL = million fibers per liter of water.
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
Alachlor
carcinogenicity
0.004
NA -5
0.002
NA
(causes cancer)
Aluminum
neurotoxicity and
0.6
NA
1
NA
immunotoxicity
(harms the nervous and
immune systems)
Antimony
digestive system toxicity
0.02
NA
0.006
NA
(causes vomiting)
Arsenic
carcinogenicity
0.000004
1 x10.6
0.01
2.5x10-3
(causes cancer)
(4x10-6)
(one per
(2.5 per
million)
thousand)
Asbestos
carcinogenicity
7 MFL6
1x10-6
7 MFL
1x10
(causes cancer)
(fibers
(fibers
(one per
>10
>10
million)
microns in
microns in
length)
length)
Atrazine
carcinogenicity
0.00015
1A0-6
0.001
7x10-6
(causes cancer)
(seven per
million)
Based on the OEHHA PHG technical support document unless otherwise specified. The categories are
the hazard traits defined by OEHHA for California's Toxics Information Clearinghouse (online at:
httn://oehha.ca.gov/Multimediatoreen/od`f/GC ResatextO11912.adf1.
mg1L = milligrams per liter of water or parts per million (ppm)
S Cancer Risk = Upper estimate of excess cancer risk from lifetime exposure. Actual cancer risk may be
lower or zero: 1x10.5 means one excess cancer case per million people exposed.
4 MCL = maximum contaminant level.
5 NA = not applicable. Risk cannot be calculated. The PHG is set at a level that is believed to be without
any significant public health risk to individuals exposed to the chemical over a lifetime.
5 MFL = million fibers per liter of water.
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
Body weight effects are an indicator of general toxicity in animal studies.
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk 3
MCL4
Risk at the
(mg/L)z
at the
(mg/L)
California
PHG
MCL
Barium
cardiovascular toxicity
2
NA
1
NA
(causes high blood
pressure)
Bentazon
hepatotoxicity and
0.2
NA
0.018
NA
digestive system toxicity
(harms the fiver,
intestine, and causes
body weight effects')
Benzene
carcinogenicity
0.00015
1x10"6
0.001
7x10"6
(causes leukemia)
(seven per
million)
Benzofalpyrene
carcinogenicity
0.000007
1x10"6
0.0002
3x10"5
(causes cancer)
(three per
hundred
thousand)
Beryllium
digestive system toxicity
0.001
NA
0.004
NA
(harms the stomach or
intestine)
Bromate
carcinogenicity
0.0001
1x10-6
0.01
1x10-4
(causes cancer)
(one per
ten
thousand)
Cadmium
nephrotoxicity
0.00004
NA
0.005
NA
(harms the kidney)
Carbofuran
reproductive toxicity
0.0017
NA
0.018
NA
(harms the testis)
Body weight effects are an indicator of general toxicity in animal studies.
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
e AL = action level. The action levels for copper and lead refer to a concentration measured at the tap. Much
of the copper and lead in drinking water is derived from household plumbing (The Lead and Copper Rule,
Title 22, CaliforniaCode of Regulations [CCR] section 64672.3).
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
Carbon
carcinogenicity
0.0001
1x10"6
0.0005
5x10-6
tetrachloride
(causes cancer)
(five per
million)
Chlordane
carcinogenicity
0.00003
1x10-6
0.0001
3x10-6
(causes cancer)
(three per
million)
Chlorite
hematotoxicity
0.05
NA
1
NA
(causes anemia)
neurotoxicity
(causes neurobehavioral
effects)
Chromium,
carcinogenicity
0.00002
1x10-6
NA
hexavalent
(causes cancer)
Copper
digestive system toxicity
0.3
NA
1.3 (AL)'
NA
(causes nausea,
vomiting, diarrhea)
Cyanide
neurotoxicity
0.15
NA
0.15
NA
(damages nerves)
endocrine toxicity
(affects the thyroid)
Dalapon
nephrotoxicity
0.79
NA
0.2
NA
(harms the kidney)
1_;2-Dibromo-3-
carcinogenicity
0.0000017
1x10-6
0.0002
1x10-4
chloropropane
(causes cancer)
(1.7x10-6)
(one per
D( BCP)
ten
thousand)
e AL = action level. The action levels for copper and lead refer to a concentration measured at the tap. Much
of the copper and lead in drinking water is derived from household plumbing (The Lead and Copper Rule,
Title 22, CaliforniaCode of Regulations [CCR] section 64672.3).
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
1,2-Dichloro-
hepatotoxicity
0.6
NA
0.6
NA
benzene (o-
(harms the liver)
DCB)
1,4-Dichloro-
carcinogenicity
0.006
1x10-6
0.005
8x10-7
benzene (p-
(causes cancer)
(eight per
DCB)
ten million)
1.1-Dichloro-
carcinogenicity
0.003
1x10-6
0.005
2x10-6
ethane [1_,'I-
(causes cancer)
(two per
DCA)
million)
1.2-Dichloro-
carcinogenicity
0.0004
1x10-6
0.0005
1x10-6
ethane (1,2-
(causes cancer)
(one per
DCA)
million)
1.1-Dichloro-
hepatotoxicity
0.01
NA
0.006
NA
ethylene
(harms the liver)
(1, 1-DCE)
1,2-Dichloro-
nephrotoxicity
0.1
NA
0.006
NA
ethylene, cis
(harms the kidney)
1,2-Dichloro-
hepatotoxicity
0.06
NA
0.01
NA
ethylene, trans
(harms the liver)
Dichloromethane
carcinogenicity
(causes cancer)
0.004
1x10-6
0.005
1x10-6
(one per
(methylene
chloride)
million)
2,4-Dichloro-
hepatotoxicity and
0.02
NA
0.07
NA
phenoxyacetic
nephrotoxicity
acid (2,4-D)
(harms the liver and
kidney)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk'
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
1,2-Dichloro-
carcinogenicity
0.0005
1x10-6
0.005
1x10-5
propane
(causes cancer)
(one per
(progylene
hundred
dichloride`
thousand.)
1.3-Dichloro-
carcinogenicity
0.0002
1x10.6
0.0005
2x10"6
propene
(causes cancer)
(two per
(Telone II®)
million)
Di(2-ethylhexyl)
developmental toxicity
0.2
NA
0.4
NA
adipate (DEHA)
(disrupts development)
Diethylhexyl-
carcinogenicity
0.012
1x10"6
0.004
3x10"'
phthalate
(causes cancer)
(three per
D( EHP)
ten million)
Dinoseb
reproductive toxicity
0.014
NA
0.007
NA
(harms the uterus and
testis)
Dioxin (2,37,8-
carcinogenicity
5x10-'
1x10
3x10-$
6x10
TCDD)
(causes cancer)
(six per ten
thousand)
Di uat
ocular toxicity
0.015
NA
0.02
NA
(harms the eye)
developmental toxicity
(causes malformation)
Endothall
digestive system toxicity
0.58
NA
0.1
NA
(harms the stomach or
intestine)
Endrin
hepatotoxicity
0.0018
NA
0.002
NA
(harms the liver)
neurotoxicity
(causes convulsions)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)Z
at the
(mg/L)
California
PHG
MCL
Ethylbenzene
hepatotoxicity
0.3
NA
0.3
NA
(phenylethane)
(harms the liver)
Ethylene
carcinogenicity
0.00001
1x10.6
0.00005
5x10"6
dibromide
(causes cancer)
(five per
million)
Fluoride
musculoskeletal toxicity
1
NA
2
NA
(causes tooth mottling)
Glyphosate
nephrotoxicity
0.9
NA
0.7
NA
(harms the kidney)
Heptachlor
carcinogenicity
0.000008
1x10-6
0.00001
1x10-6
(causes cancer)
(one per
million)
Heptachlor
carcinogenicity
0.000006
1x10-6
0.00001
2x10-6
epoxide
(causes cancer)
(two per
million)
Hexachloroben-
carcinogenicity
0.00003
1x10'6
0.001
3x10"5
zene
(causes cancer)
(three per
hundred
thousand)
Hexachloro-
digestive system toxicity
0.05
NA
0.05
NA
cvclopentadiene
(causes stomach
lesions)
(HEX)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)Z
at the
(mg/L)
California
PHG
MCL
Lead
developmental
0.0002
3x10-8
0.015
2x10"6
neurotoxicity
(PHG is
(AL)8
(two per
(causes neurobehavioral
not based
million)
effects in children)
on this
cardiovascular toxicity
effect)
(cause high blood
pressure)
carcinogenicity
(causes cancer)
Lindane
carcinogenicity
0.000032
1x10-6
0.0002
6x10
(Y -BHC)
(causes cancer)
(six per
million)
Mercury
nephrotoxicity
0.0012
NA
0.002
NA
inor anic
(harms the kidney)
Methoxychlor
endocrine toxicity
0.00009
NA
0.03
NA
(causes hormone
effects)
Methyl tertiary-
carcinogenicity
0.013
1 x 10`6
0.013
1 x 10-6
butyl ether
(causes cancer)
(one per
MTBE
million)
Molinate
carcinogenicity
0.001
1x10'6
0.02
2x10-5
(causes cancer)
(two per
hundred
thousand)
Monochloro-
hepatotoxicity
0.2
NA
0.07
NA
benzene
(harms the liver)
(chlorobenzene)
Nickel
developmental toxicity
0.012
NA
0.1
NA
(causes increased
neonatal deaths)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
9 This is the current PHG value for perchlorate. A revised draft PHG for perchlorate was posted online for
public comment on December 7, 2012. htt2://www.oehha.ce.aov/water/nho/120712Perchlorate.htmi.
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
Nitrate
hematotoxicity
45 as
NA
45 as NO3
NA
(causes
nitrate
methemoglobinemia)
Nitrite
hematotoxicity
1 as
NA
1 as
NA
(causes
nitrogen
nitrite-
methemoglobinemia)
nitrogen
Nitrate and
hematotoxicity
10 as
NA
10 as
NA
Nitrite
(causes
nitrogen
nitrogen
methemoglobinemia)
N -nitroso-
carcinogenicity
0.000003
1x10-6
--
NA
dimethyl -amine
(causes cancer)
N( DMA)
Oxamyl
general toxicity
0.026
NA
0.05
NA
(causes body weight
effects)
Pentachloro-
carcinogenicity
0.0003
1x10
0.001
3x10-6
phenol (PCP)
(causes cancer)
(three per
million)
Perchlorate
endocrine toxicity
0.006'
NA
0.006
NA
(affects the thyroid)
developmental toxicity
(causes neurodevelop-
mental deficits)
Picloram
hepatotoxicity
0.5
NA
0.5
NA
(harms the liver)
9 This is the current PHG value for perchlorate. A revised draft PHG for perchlorate was posted online for
public comment on December 7, 2012. htt2://www.oehha.ce.aov/water/nho/120712Perchlorate.htmi.
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
Polychlorinated
carcinogenicity
0.00009
1x10-6
0.0005
6x10-6
biphenyls
(causes cancer)
(six per
(PCBs)
million)
Radium -226
carcinogenicity
0.05 pCi/L
1x10-6
5 pCi/L
1x10
(causes cancer)
(one per
ten
thousand)
Radium -228
carcinogenicity
0.019 pCi/L
1x10-6
5 pCi/L
3x10
(causes cancer)
(combined
(three per
Ra226+228)
ten
thousand)
Selenium
integumentary toxicity
0.03
NA
0.05
NA
(causes hair loss and
nail damage)
Silvex (2,4,5 -TP)
hepatotoxicity
(harms the liver)
0.025
NA
0.05
NA
Simazine
general toxicity
0.004
NA
0.004
NA
(causes body weight
effects)
Strontium -90
carcinogenicity
0.35 pCi/L
1x10-6
8 pCi/L
2x10-5
(causes cancer)
(two per
hundred
thousand)
Styrene
carcinogenicity
0.0005
1x10-6
0.1
2x10-4
(vinylbenzene)
(causes cancer)
(two per
ten
thousand)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
1,1,2,2-
carcinogenicity
0.0001
1x10'6
0.001
1x10-5
Tetrachloro-
(causes cancer)
(one per
ethane
hundred
thousand)
Tetrachloro-
carcinogenicity
0.00006
1x10-6
0.005
8x10-5
ethylene
(causes cancer)
(eight per
erch oro-
hundred
ethylene, or
thousand)
EgEj
Thallium
integumentary toxicity
0.0001
NA
0.002
NA
(causes hair loss)
Thiobencarb
general toxicity
0.07
NA
0.07
NA
(causes body weight
effects)
hematotoxicity
affects red blood cells
Toluene
hepatotoxicity
0.15
NA
0.15
NA
(methylbenzene)
(harms the liver)
endocrine toxicity
(harms the thymus)
Toxaphene
carcinogenicity
0.00003
1x10-6
0.003
1x10-4
(causes cancer)
(one per
ten
thousand)
1.2;4-Trichloro-
endocrine toxicity
0.005
NA
0.005
NA
benzene
(harms adrenal glands)
.(Unsym-TCB)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mg/L)
California
PHG
MCL
1,1,1-Trichloro-
neurotoxicity
1
NA
0.2
NA
ethane
(harms the nervous
system),
reproductive toxicity
(causes fewer offspring)
hepatotoxicity
(harms the Liver)
hematotoxicity
causes blood effects
1.1.2-Trichloro-
carcinogenicity
0.0003
1x10"6
0.005
2x10-5
ethane
(causes cancer)
(two per
hundred
thousand)
112-Trichloro-
carcinogenicity
0.0017
1x10'6
0.005
3x10"6
ethylene (TCE)
(causes cancer)
(three per
million)
Trichlorofluoro-
hepatotoxicity
0.7
NA
0.15
NA
methane
(harms the liver)
Freon 11
1,2,3-Trichloro-
carcinogenicity
0.0000007
1x10"6
--
NA
propane
(causes cancer)
(1,2,3 -TCP)
1,1,2-Trichloro-
hepatotoxicity
4
NA
1.2
NA
1,2,2-trifluoro-
(harms the liver)
ethane
(Freon 113)
Tritium
carcinogenicity
400 pCi/L
1 x10-6
20,000
5x10-5
(causes cancer)
pCi/L
(five per
hundred
thousand)
Attachment No. 2
Table 1: Health Risk Categories and Cancer Risk Values for Chemicals
with California Public Health Goals (PHGs)
California
Cancer
California
Cancer
Chemical
Health Risk Category'
PHG
Risk
MCL4
Risk at the
(mg/L)2
at the
(mglL)
California
PHG
MCL
Uranium
carcinogenicity
0.43 pCi/L
1x10
20 pCi/L
5x10`5
(causes cancer)
(five per
hundred
thousand)
Vinyl chloride
carcinogenicity
0.00005
1x10"6
0.0005
1x10-5
(causes cancer)
(one per
hundred
thousand)
Xylene
neurotoxicity
1.8 (single
NA
1.75 (single
NA
(affects the senses,
isomer or
isomer or
mood, and motor
sum of
sum of
control)
isomers)
isomers)
Attachment No. 2
Table 2: Health Risk Categories and Cancer Risk Values for Chemicals
without California Public Health Goals
Health risk category based on the U.S. EPA MCLG document or California MCL document
unless otherwise specified.
2 MCLG = maximum contaminant level goal established by U.S. EPA.
s Cancer Risk =Upper estimate of excess cancer risk from lifetime exposure. Actual cancer risk
maybe lower or zero. 1 x10-6 means one excess cancer case per million people exposed.
4 California MCL = maximum contaminant level established by California..
5 Maximum Residual Disinfectant Level Goal, or MRDLG
6 Body weight effects are an indicator of general toxicity in animal studies.
U.S. EPA
Cancer
California
Cancer
Chemical
Health Risk Category'
MCLG2
Risk
MCL 4
Risk @
(mg/L)
@
(mg/L)
California
MCLG
MCL
Disinfection byproducts (DBPS)
Chloramines
acute toxicity
45
NA
none
NA
(causes irritation)
digestive system toxicity
(harms the stomach)
hematotoxicity
causes anemia
Chlorine
acute toxicity
45
NA
none
NA
(causes irritation)
digestive system toxicity
harms the stomach
Chlorine dioxide
hematotoxicity
0.85
NA
none
NA
(causes anemia)
neurotoxicity
(harms the nervous
system)
Disinfection byproducts: haloacetic acids (HAAS)
Chloroacetic acid
general toxicity
0.07
NA
none
NA
(causes body and organ
weight changes6)
Dichloroacetic
carcinogenicity
0
0
none
NA
acid
(causes cancer)
Trichloroacetic
hepatotoxicity
0.02
0
none
NA
acid
(harms the liver)
Bromoacetic acid
NA
none
NA
none
NA
Health risk category based on the U.S. EPA MCLG document or California MCL document
unless otherwise specified.
2 MCLG = maximum contaminant level goal established by U.S. EPA.
s Cancer Risk =Upper estimate of excess cancer risk from lifetime exposure. Actual cancer risk
maybe lower or zero. 1 x10-6 means one excess cancer case per million people exposed.
4 California MCL = maximum contaminant level established by California..
5 Maximum Residual Disinfectant Level Goal, or MRDLG
6 Body weight effects are an indicator of general toxicity in animal studies.
Attachment No. 2
Table 2: Health Risk Categories and Cancer Risk Values for Chemicals
without California Public Health Goals
Table 2: Health Risk Categories and Cancer Risk Values for Chemicals
without California Public Health Goals
U.S. EPA
Cancer
California
Cancer
Chemical
Health Risk Category
MCLG2
Risk
MCL4
Risk @
(mg/L)
@
(mg/L)
California
MCLG
MCL
Dibromoacetic
NA
none
NA
none
NA
acid
Total haloacetic
carcinogenicity
none
NA
0.06
NA
acids
(causes cancer)
Disinfection byproducts: trihalomethanes (THMs)
Bromodichloro-
carcinogenicity
0
0
none
NA
methane (BDCM)
(causes cancer)
Bromoform
carcinogenicity
0
0
none
NA
(causes cancer)
Chloroform
hepatotoxicity and
0.07
NA
none
NA
nephrotoxicity
(harms the liver and
kidney)
Dibromo-
hepatotoxicity,
0.06
NA
none
NA
chloromethane
nephrotoxicity, and
(DBCM)
neurotoxicity
(harms the liver, kidney,
and nervous system)
Total (sum of
carcinogenicity
none
NA
0.08
NA
BDCM,
(causes cancer),
bromoform,
hepatotoxicity,
chloroform and
nephrotoxicity, and
DBCM)
neurotoxicity
(harms the liver, kidney,
and nervous system)
Table 2: Health Risk Categories and Cancer Risk Values for Chemicals
without California Public Health Goals
Attachment No. 2
' MCLs for gross alpha and beta particles are screening standards for a group of radionuclides.
Corresponding PHGs were not developed for gross alpha and beta particles. See the OEHHA
memoranda discussing the cancer risks at these MCLS at http://www.oehha.ca.gov/water/phglindex.htmi.
8 pCi/L = picocuries per liter of water.
U.S. EPA
Cancer
California
Cancer
Chemical
Health Risk Category'
MCLG2
Risk'
MCL4
Risk @
(mg/L)
@
(mglL)
California
MCLG
MCL
Radionuclides
Gross alpha
carcinogenicity
0 (210Po
0
15 pCi/LB
up to 1x10-3
particles
(causes cancer)
included)
(includes
�26Ra
(for 210Po,
but
the most
not radon
potent
and
alpha
uranium)
emitter
Beta particles and
carcinogenicity
o(21 Oft
0
50 pCi/L
up to 2x10"3
photon emitters'
(causes cancer)
included)
(judged
(for 21 'Pb,
equiv. to 4
the most
mrem/yr)
potent
beta -
emitter)
' MCLs for gross alpha and beta particles are screening standards for a group of radionuclides.
Corresponding PHGs were not developed for gross alpha and beta particles. See the OEHHA
memoranda discussing the cancer risks at these MCLS at http://www.oehha.ca.gov/water/phglindex.htmi.
8 pCi/L = picocuries per liter of water.
ATTACHMENT NO. 3
Table 1
Reference: 2012 ACWA PHG Survey
COST ESTIMATES FOR TREATMENTTECHNOLOGIES
(INCLUDES ANNUALIZED CAPITAL AND O&M COSTS)
Page 1 of 2
Estimated Unit Cost
No.
Treatment
Source of Information
2012 ACWA Survey
Technology
($/1,000 gallons
treated
1
[on Exchange
Coachella Valley WD, for GW, to reduce Arsenic concentrations.
1.84
2011 costs.
2
Ion Exchange
City of Riverside Public Utilities, for GW, for Perchlorate treatment.
0.89
Carollo Engineers, anonymous utility, 2012 costs for treating GW
source for Nitrates. Design souce water concentration: 88 mg/L NO3
3
Ion Exchange
Design finished water concentration: 45 mg/L NO3. Does not include
0.67
concentrate disposal or land cost.
4
Granular
City of Riverside Public Utilities, GW sources, for TCE, DBCP (VOC,
0.45
Activated Carbon
SOC) treatment..
Carollo Engineers, anonymous utility, 2012 costs for treating SW
5
Granular
source for TTHMs. Design souce water concentration: 0.135 mg/L.
0.32
Activated Carbon
Design finished water concentration: 0.07 mg/L. Does not include
concentrate disposal or land cost.
6
Granular
Activated Carbon,
LADWP, Liquid Phase GAC treatment at Tujunga Well field. Costs for
1.36
Liquid Phase
treating 2 wells. Treament for 1,1 DCE (VOC). 2011-2012 costs.
Carollo Engineers, anonymous utility, 2012 costs for treating GW
source for Nitrates. Design souce water concentration: 88 mg/L NO3,
7
Reverse Osmosis
Design finished water concentration: 45 mg/L NO3. Does not include
0'72
concentrate disposal or land cost.
8
Packed Tower
City of Monrovia, treatment to reduce TCE, PCE concentrations. 2011
0.39
Aeration
12 costs.
Ozonation+
SCVWD, STWTP treatment plant includes chemical addition + ozone
9
Chemical addition
generation costs to reduce THM/HAAs concentrations. 2009-2012
0.08
costs.
Ozonation+
SCVW D, PWTP treatment plant includes chemical addition + ozone
10
Chemical addition
generation costs to reduce THM/HAAs concentrations, 2009-2012
0.18
costs.
Page 1 of 2
COST ESTIMATES FOR TREATMENT TECHNOLOGIES
(INCLUDES ANNUALIZED CAPITAL AND O&M COSTS)
Page 2 of 2
Estimated Unit Cost
No.
Treatment
Source of Information
2012 ACWA Survey
Technology
($/1,000 gallons
treated
11
Coagulation/Filtrat
Soquel WD, treatment to reduce manganese concentrations in GW.
0.68
ion
2011 costs.
Coagulation/Filtrat
San Diego WA, costs to reduce THM/Bromate, Turbidity
12
ion Optimization
concentrations, raw SW a blend of State Water Project water and
0.77
Colorado River water, treated at Twin Oaks Valley WTP.
13
Blending (Well)
Rancho California WD, GW blending well, 1150 gpm, to reduce
0.64
fluoride concentrations.
14
Blending (Wells)
Rancho California WD, GW blending wells, to reduce arsenic
0.52
concentrations, 2012 costs.
15
Blending
Rancho California WD, using MWD water to blend with GW to reduce
0.62
arsenic concentrations. 2012 costs.
16
Corrosion
Atascadero Mutual WC, corrosion inhibitor addition to control
0.08
Inhibition
aggressive water. 2011 costs.
Page 2 of 2
Please immediately confirm receipt
of this fax by calling 333-6702
CITY OF LODI
P. O. BOX 3006
LODI, CALIFORNIA 95241-1910
ADVERTISING INSTRUCTIONS
SUBJECT: PUBLIC HEARING TO RECEIVE COMMENTS ON AND CONSIDER
ACCEPTING CITY OF LODI'S REPORT ON WATER QUALITY
RELATIVE TO PUBLIC HEALTH GOALS
PUBLISH DATE: SATURDAY, SEPTEMBER 7, 2013
TEAR SHEETS WANTED: One (1) please
SEND AFFIDAVIT AND BILL TO: RANDI JOHL-OLSON, CITY CLERK
LNS ACCT. #0510052 City of Lodi
P.O. Box 3006
Lodi, CA 95241-1910
DATED: THURSDAY, SEPTEMBER 5, 2013
ORDERED BY: RANDI JOHL-OLSON
CITY CLERK
NIFER . ROBISON, CMC
SSISTAN CITY CLERK
MARIA DITMORE
ADMINISTRATIVE CLERK
Faxed to the Sentinel at.369-1084 a' L.: (time) on (date) (pages)
LNS Phoned to confirm receipt of all pages at" (time) MD JMR (initials)
fortnAadvins.doc
DECLARATION OF POSTING
PUBLIC HEARING TO RECEIVE COMMENTS ON AND CONSIDER
ACCEPTING CITY OF LODI'S REPORT ON WATER QUALITY RELATIVE TO
PUBLIC HEALTH GOALS
On Thursday, September 5, 2013, in the City of Lodi,
Notice of Public Hearing to receive comments on and
Report on Water Quality Relative to Public Health
Exhibit A) was posted at the following locations:
Lodi Public Library
Lodi City Clerk's Office
Lodi City Hall Lobby
Lodi Carnegie Forum
San Joaquin County, California, a
consider accepting City of Lodi's
Goals (attached and marked as
I declare under penalty of perjury that the foregoing is true and correct.
Executed on September 5, 2013, at Lodi, California.
ASSISTANT CITY CLEVK
N:\Administration\CLERK\Fonns\DECPOSTPW.DOC
ORDERED BY:
RANDI JOHL-OLSON
CITY CLERK
MARIA DITMORE
ADMINISTRATIVE CLERK
• CITY OF LODI
Carnegie Forum
• 305 West Pine Street, Lodi
14
NOTICE OF PUBLIC HEARING
Date: October 2, 2013
Time: 7:00 p.m.
For information regarding this notice please contact:
Randi Johl-Olson,
City Clerk
Telephone: (209) 333-6702
NOTICE OF PUBLIC HEARING
NOTICE IS HEREBY GIVEN that on Wednesday, October 2, 2013, at the hour of
7:00 p.m., or as soon thereafter as the matter may be heard, the City Council will
conduct a public hearing at the Carnegie Forum, 305 West Pine Street, Lodi, to consider
the following matter:
a) Receive comments on and consider accepting City of Lodi's Report on
Water Quality Relative to Public Health Goals.
Information regarding this item may be obtained in the Public Works Department,
221 West Pine Street, Lodi, (209) 333-6706. All interested persons are invited to
present their views and comments on this matter. Written statements may be filed with
the City Clerk, City Hall, 221 West Pine Street, 2nd Floor, Lodi, 95240, at any time prior
to the hearing scheduled herein, and oral statements may be made at said hearing.
If you challenge the subject matter in court, you may be limited to raising only those
issues you or someone else raised at the public hearing described in this notice or in
written correspondence delivered to the City Clerk, 221 West Pine Street, at or prior to
the close of the public hearing.
B rd r of the Lodi City Council:
R�a�-
City Clerk
Dated: September 4, 2013
Approved as to form:
D. Stephen Schwabaue
City Attorney
N:\Administration\CLERK\PubHear\NOTICES\NotPW.doc CLERK\PUBHEAR\NOTICES\NotPW.doc 9/4/13