HomeMy WebLinkAboutAgenda Report - July 15, 1998 (39)0
CITY OF LODI COUNCIL COMMUNICATION
AGENDA TITLE: Set Public Hearing for August 19, 1998, to Consider Receiving Comments on the
City of Lodi's Public Health Goals Report
MEETING DATE: July 15, 1998
PREPARED BY: Public Works Director
RECOMMENDED ACTION: That the City Council set a Public Hearing for August 19, 1998 to receive
comments on and accept the required Public Health Goals Report.
BACKGROUND INFORMATION: Attached is a report prepared by staff comparing Lodi's drinking
water quality with California EPA's public health goals (PHGs)
and with the US EPA's maximum contaminant level goals (MCLGs).
PHGs and MCLGs are not enforceable standards and no action to
meet them is mandated.
SB 1307 (Calderone-Sher; effective January 1, 1997) added new provisions to the California Health and
Safety Code which mandate that a report be prepared on or before July 1, 1998. The attached report is
intended to provide information to the public in addition to the Annual Water Quality Report mailed to
each customer in April 1998. On July 1, 1998, a public notice appeared in the Lodi News Sentinel to
inform any interested party of the Public Health Goals Report and its availability.
The new 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.
Our water system complies with all of the health -based drinking water standards and maximum
contaminant levels (MCLs) as required by the California Department of Health Services and the
US EPA. No additional actions are required or recommended.
FUNDING: Not applicable.
`/
-1411v
Richard C. Prima, Jr.
Public Works Director
Prepared by Frank Beeler, Assistant Water/Wastewater Superintendent
RCP/FB/dsg
Attachment
cc: Water/Wastewater Superintendent
Assistant Wastewater Treatment Superintendent
APPROVED:
. Dixon Flynn — City
GAW W WICCPHGRPT.DOC 7101198
CITY OF LODI
REPORT ON WATER QUALITY
RELATIVE TO PUBLIC HEALTH GOALS
July 1, 1998
Background
Recently enacted provisions of the California Health and Safety Code specify that larger
water utilities (more than10,000 service connections) are required to prepare a special report
on or before July 1, 1998, if their water quality measurements have exceeded any Public
Health Goals (PHGs). These are non -enforceable goals established by the Cal -EPA's Office
of Environmental Health Hazard Assessment. The first 27 of these PHGs were adopted by
Cal. EPA on December 31, 1997, but the PHG for uranium was later withdrawn. The law also
requires that where Cal. EPA has not adopted a PHG for a constituent, the water suppliers
are to use the Maximum Contaminant Level Goals (MCLGs) adopted by the United States
Environmental Protection Agency (U.S.EPA). 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 per regulations.
The new law specified what information is to be provided in the report. If a constituent was
detected in the water supply in 1997 at a level exceeding an applicable PHG or MCLG, this
report provides the information required by the law. Included are:
• the numerical public health risk associated with the Maximum Contaminant Level (MCL)
and the PHG or MCLG;
• the category or type of risk to health that could be associated with each constituent;
• the best treatment technology available that could be used to reduce the constituent level;
and
• an estimate of the cost to install that treatment if it is appropriate and feasible.
What Are PHGs?
PHGs are set by the California Office of Environmental Health Hazard Assessment 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 U.S.EPA or the California
Department of Health Services in setting drinking water standards (Maximum Contaminant
Levels or MCLs) are considered in setting the PHGs. These factors include analytical
detection capability, treatment technology available, benefits and costs. The PHGs are not
enforceable and are not required to be met by any public water system. MCLGs are the
federal equivalent to PHGs.
Report on Water Quality Relative to Public Health Goals
July 1, 1998
Page 2
Water Qualitv Data Considered:
All of the water quality data collected by our water system in 1997 for purposes of determining
compliance with drinking water standards was considered. This data was all summarized in
the attached 1997 Annual Water Quality Report which was mailed to all of our customers in
April 1998.
Guidelines Followed:
The Association of California Water Agencies prepared guidelines for water utilities to use in
preparing these newly required reports, and these guidelines were used in the preparation of
our report. No guidance was available from state regulatory agencies.
Best Available Treatment Technology and Cost Estimates:
Both the U.S. EPA and the California Department of Health Services adopt what are known as
Best Available Technologies or BATs which are the best known methods of reducing
contaminant levels to the MCL. Costs can be estimated for such technologies. However,
since many PHGs and all MCI -Gs are set much lower than the MCL, it is not always possible
nor feasible to determine what treatment is needed to further reduce a constituent downward
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, because it is not possible to verify by
analytical means that the level has been lowered to zero. In some cases, installing treatment
to try and 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.
Trichloroethylene (TCE): There is no PHG for TCE, but the MCLG set by the U.S. EPA is
zero. The MCL or drinking water standard for TCE is 0.005 milligrams per liter (mg/I or
parts per million). We detected TCE at levels not exceeding the MCL in three (3) of Lodi's
21 wells used in 1997. The averages for these wells in 1997 were:
Well No. 2 - 0.0048 mg/I;
Well No. 12 - 0.0007 mg/I, and
Well No. 24 - 0.0011 mg/l.
The category of health risk associated with TCE, and the reason that a drinking water
standard was adopted for it, is the people who drink water containing TCE above the MCL
throughout their lifetime could theoretically experience an increased risk of getting cancer.
The California Department of Health Services 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." (CDHS Blue Book of drinking water law and regulations, Section
64468.2, Title 22, CCR.) The numerical heath risk for an MCLG of zero is zero. The Best
Available Technology for TCE to lower the level below the MCL is either Granular Activated
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Report on Water Quality Relative to Public Health Goals
July 1, 1998
Page 3
Carbon or Packed Tower Aeration. Since the TCE level in these three wells is already below
the MCL, a Granular Activated Carbon Treatment System with a long empty bed contact time
would likely be required to attempt to lower the TCE level to zero. The estimated cost to
install such a treatment system on Wells No. 2, 12 and 24 that would reliably reduce the TCE
level to zero would be roughly $1.5 million and require annual Operation and Maintenance at
a cost of roughly $200,000 per year. This would result in an assumed increased cost for each
customer of over $16 per year*.
Dibromochloropropane (DBCP): There is no PHG for DBCP, but the MCLG set by the
U.S. EPA is zero. The MCL for DBCP is 0.0002 mg/I. We detected DBCP at levels not
exceeding the MCL in 11 of Lodi's 21 wells used in 1997. The annual averages for these
wells in 1997 were:
Well No. 1 R
- 0.00012 mg/I;
Well No. 6R
- 0.00005 mg/l;
Well No. 8
- 0.00017 mg/l;
Well No. 9
- 0.00003 mg/I;
Well No. 13
- 0.00011 mg/l;
Well No. 14
- 0.00016 mg/I;
Well No. 16
- 0.00009 mg/I;
Well No. 17
- 0.00007 mg/l;
Well No. 21
- 0.00002 mg/I;
Well No. 22
- 0.00010 mg/l; and
Well No. 23
- 0.00010 mg/I.
The category of 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.
The California Department of Health Services 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." (CDHS Blue Book of drinking water law and regulations, Section
64468.3, Title 22, CCR.) The numerical heath 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. The estimated cost to install such a treatment
system on 9 Wells, and enhance capacities on 4 Wells with existing treatment systems
(including Well No. 4R that was not listed earlier), that would reliably reduce the DBCP level
to zero would be roughly $4.8 million. The increased annual Operation and Maintenance
costs would be roughly $580,000 per year. This would result in an assumed increased cost
for each customer of over $50 per year*. (Note: this increased cost may not be reimbursable
under the terms of Lodi's settlement agreement with DBCP manufacturers.)
* All annual customer costs were based on an assumed annualized cost of capital expenditures equal
to 10% of capital costs plus annual operation and maintenance costs divided by 21,000 customers.
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Report on Water Quality Relative to Public Health Goals
July 1, 1998
Page 4
Coliform Bacteria: In 1997, we collected over 1,000 samples from our distribution system for
coliform analysis. Of these samples, 1.4% were positive for coliform bacteria. In 1997 a
maximum of 4.7% 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 in
monitoring and analysis. If a positive sample is found, it indicates a potential problem that
needs to be investigated and follow up sampling 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 1997.
To reduce the number of positive results for coliform bacteria, the City of Lodi occasionally
chlorinates the water system. The sources of water (Wells) and all new or repaired water
mains follow disinfection procedures and pass bacteriological testing before being allowed
"on-line". We are working on updating monitoring and operational procedures to further
prevent occurrences of Coliform bacteria levels exceeding the MCL.
Full time chlorination will not guarantee that a system will never get a positive sample. If the
City were to go to full time chlorination of the drinking water system, the estimated cost to
install chlorine generation systems on 24 Wells would be roughly $800,000 and annual
Operation and Maintenance cost would be roughly $50,000 per year. This would result in an
assumed increased cost for each customer of over $6 per year*.
Lead: The category of health risk for lead is damage to the kidneys or nervous system of
humans. Numerical health risk data on lead has not yet been provided by CAL. EPA, the
State agency responsible for providing that information.
Our water system is in full compliance with the Federal and State Lead and Copper Rule.
Based on past sampling performed according to Federal and State regulatory requirements,
we meet the Action Levels for Lead. We are also deemed by the Federal and State Lead and
*
All annual customer costs were based on an assumed annualized cost of capital expenditures equal
to 10% of capital costs plus annual operation and maintenance costs divided by 21,000 customers.
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Report on Water Quality Relative to Public Health Goals
July 1, 1998
Page 5
Copper Rule to have naturally occurring "optimized corrosion control" for our system. This
determination was established by testing for Lead and Copper at customers taps in Lodi and
an evaluation of the naturally occurring minerals and characteristics found in Lodi's water.
Analyses for Lead are also performed at the individual wells. The PHG for Lead is 0.002
mg/I. We detected Lead at a level not exceeding the MCL but over the PHG in one (1) of
Lodi's 21 wells used in 1997 at a level of 0.009 mg/I at Well No. 5. A follow up sample at Well
No. 5 in 1998 showed no detectable levels of Lead.
In general, optimizing corrosion control is considered the best available technology to deal
with corrosion issues and with any lead or copper findings. Therefore, having "optimized
corrosion control" and the fact that Well No. 5 no longer shows any level of Lead, there is no
further action that can be practically taken to further reduce lead levels in the water system.
Recommendations For Further Action:
The drinking water quality of the City of Lodi Public Water System meets all State of
California, Department of Health Services 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 health -based Maximum Contaminant Levels established to provide
"safe drinking water', additional costly treatment processes would be required. The
effectiveness of the treatment processes to provide any significant reductions in constituent
levels at these already low values is uncertain. The theoretical health protection benefits of
these further hypothetical reductions are not at all clear and may not be quantifiable.
Therefore, staff is not recommending further action at this time. However, the point of this
process is to provide you with information on the quality of your drinking water and rough
costs to make certain improvements.
This report was completed by City of Lodi Public Works Department staff. Any questions
relating to this report should be directed to: City of Lodi, Assistant Water/Wastewater
Superintendent Frank Beeler, 1331 South Ham Lane, Lodi, CA 95242 or call (209) 333-6740.
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PUBLIC WORKS DEPARTMENT
Annual Water Quality Report for 1997
To keep our water customers informed about drinking
water in Lodi, the City of Lodi distributes this annual
report. The Water Quality Report on Pages 2 and 3
summarizes testing performed on Lodi's water supply by
State certified laboratories. To better understand the
report please note the description of terms and
abbreviations at the top of page 2.
The City of Lodi supplies high-quality groundwater
through approximately 24 City wells which are all
interconnected through 200 miles of water mains.
These wells operate automatically on demand, so when
water use increases, more wells come on line. To also
help meet peak water demands, the City had a one
million gallon storage tank and pump station constructed
east of Highway 99 on Thurman Street. For peak use
purposes, this tank will take the place of three wells and
was put in operation last summer.
Prompted by the power outage on August 10, 1996, the
City stepped up the purchases of new generators for
City wells. While these will help maintain water pressure
during power outages, please refrain from using water
during power outages and save the capacity for
emergency uses i.e., fire fighting.
WATER CONSERVATION
In 1997, 5.321 billion gallons of water were pumped to
satisfy Lodi's water demands. This represents 10.7%
less use per person than 1987, however, it is an
increase of 7.7% over the 1996 per person usage.
Your diligent conservation practices, as in the past, are
needed in 1998. Not only do we preserve a valuable
natural resource, dollar savings from conservation far
exceeds the program's cost. Your water conservation
efforts have resulted in annual savings in operation and
maintenance and averted millions of dollars in capital
costs, helping water rates stay as low as possible. The
millions of dollars in capital cost savings can easily be
lost if water conservation is not continued. Please read
the water conservation message on Page 4.
PLANNING FOR THE FUTURE
On November 13, 1997 a "Water Supply Workshop" was
held. Lodi Citizens and other interested parties were
invited to participate. The objective of the workshop
was to review Lodi's water supply issues, note concerns
about the water supply, and discuss all possible water
supply sources. There were many good discussions
and good ideas, all of which are being summarized for
review. Upon review of the summary, the City Council
will identify components meriting further action or study.
Lodi is also actively participating in the East San
Joaquin Parties Water Authority (ESJPWA) on ways
to bring in new water supplies into the area and to
restore the groundwater table.
DBCP UPDATE
In some areas the groundwater below Lodi contains
small amounts of Dibromochloropropane (DBCP).
However, the people of Lodi have not been served
water exceeding the DBCP standards.
To date the City has installed Granular Activated Carbon
(GAC) treatment on four wells to remove DBCP. The
City plans to install two more treatment systems in 1998
on shut down wells in order to reactivate them.
In 1996 the City settled a lawsuit against manufacturers
of DBCP, who have already paid the City for a large
portion of Lodi's costs related to DBCP (including 50%
of the costs of the new 1 MG water storage tank/
pumping station on Thurman Street). The makers of
DBCP will continue to pay a large portion of the City's
DBCP related costs for the 40 -year life of the settlement.
SOILS AND GROUNDWATER PCE/TCE CLEAN-UP
The City is pursuing a resolution to another
contamination problem in the north and central Lodi
area. While NO operating wells are out of compliance .
with any drinking water standards, detectable amounts
of Tetrachloroethylene (PCE) and Trichloroethylene
(TCE) are found in soils and shallow groundwater. The
City has retained legal and engineering assistance to
aid in development of funding towards clean-up and
containment of these dry cleaning and industrial
solvents before contamination spreads to the City's
operating drinking water wells.
BACTERIAL WATER QUALITY
Lodi takes over 18 samples per week from throughout
Lodi's water distribution system for bacterial water
quality. Strict testing for bacteria shows if any harmful
types are possibly present. In 1997 the City water met
all bacterial standards. (See the bacterial water quality
summary on page 3.)
Normally Lodi's water does not contain chlorine.
However, in January, 1997 and again in May, 1997 the
water was chlorinated for one week and three weeks
respectively as proactive steps to help keep the water
system in compliance with strict bacterial standards.
Occasionally the City may chlorinate your water, but
we'll make every effort to inform you in local papers
before your water is chlorinated.
In summary, you should consider your water safe to
drink. Water delivered to your tap meets or is better
than all federal and state water quality standards.
If you have any questions about this report or the
quality of Lodi's water, please call the City's
Water/Wastewater Office at (209) 333-6740.
City of Lodi, 1997 Annual Water Quality Report to Customers, April 1998, Page 1
• CITY OF LODI - PUBLIC WORKS DEPARTMENT
ANNUAL WATER QUALITY REPORT FOR 1997
(PART 1 OF 2)
Definition of terms and abbreviations
NA = Not Applicable NS = No Standard (MCL) Set ND = Not Detected at Minimum Detection Levels
MCL = Maximum Contaminant Level (State Standard) < Means "less than" the amount shown.
"Minimum Detection Level" means the minimum amount a laboratory can accurately detect.
Unless otherwise noted the results are given in milligrams per liter (mg/L or parts per million)
Results are only from wells which supplied drinking water in 1997.
Organic Chemicals with at least one confirmed detection in an operational City Well
Regulated
Maximum
Minimum
Average
Range
Benzene
Organic Chemicals, mg/L
Contaminant
Detection
All Wells
High - Low
Ethylbenzene
1996 data.
Level (MCL)
Level - mg/L
rng/L
mg/L
Comments:
1,1-Dichloroethylene (1,1-DCE)
0.006
0.0005
<0.0005
0.0020 -ND
Found only in Well # 2 at trace levels below
2,4,5 -TP (Silvex)
Dinoseb (DNBP)
1,1,2,2 -Tetrachloroethane
1,2 -Dichlorobenzene (o -DCB)
Di (2-ethylhexyl) adipate
the MCL
_
Trichloroethylene (TCE)
0.005
0.0005
0.0003
0.0059 -ND
Found in Wells # 2, 12, 18, & 24 in trace levels
_
Oxamyl (Vydate)
Vinyl Chloride (VC)
1,2-Dichloropropane
Pentachlorophenol (PCP)
below the MCL.
Dibromochloropropane (DBCP)
0.0002
0.00001
0.00005
0.0003 -ND
wells officially over the MCL (No.'s 18, 19 b
Toluene
Endothall
Molinate (Odram)
1,2,4-Trichlorobenzene
Diquat
20) were not used in 1997.
{ The following Organic Chemicals with Federal and State standards, were tested for, but were
I not detected in Lodi's wells: (For details of MCL's and "Minimum Detection Levels" call the number on Page 3.)
Methyl tert-Butyl Ether (MTBE)
Thiobencarb (Bulero)
Trichloratrifluoroethane (Freon 113)
Total THM's
Endrin
Diethylhexylphthalate (DEPH)
Benzene
Lindane (gamma -BHC)
Heptachlor
Carbon tetrachloride
Methoxychlor
Heptachlor epoxide
Ethylbenzene
Toxaphene
Alachlor (ALANEX)
1,4 -Dichlorobenzene (p -DCB)
Chlordane
Benzo (a) pyrene
1,2-Dichloroethane (1,2 -DCA)
2,4-D
Carbofuran (FURADAN)
Total 1,3-Dichloropropene
Bentazon (Basagran)
Dalapon
Monchlorobenzene
2,4,5 -TP (Silvex)
Dinoseb (DNBP)
1,1,2,2 -Tetrachloroethane
1,2 -Dichlorobenzene (o -DCB)
Di (2-ethylhexyl) adipate
Tetrachloroethylene (PCE)
1,1-Dichloroethane (1,1 -DCA)
Hexachlorobenzene
1,1,1 -Trichloroethane (1,1,1 -TCA)
cis-1,2-Dichloroethylene,
Hexachlorocyclopentadiene
1,1,2 -Trichloroethane (1,1,2 -TCA)
trans-1,2-Dichloroethylene
Oxamyl (Vydate)
Vinyl Chloride (VC)
1,2-Dichloropropane
Pentachlorophenol (PCP)
_Total Xylenes (m, p & 0)
Methylene chloride
Picloram
Ethylene Dibromide (EDB)
Styrene
Total PCB's
Atrazine (AAtrex)
Toluene
Endothall
Molinate (Odram)
1,2,4-Trichlorobenzene
Diquat
Simazine (Princep)
Trichlorofluoromethane (Freon 11)
IThe following Organic Chemicals have no Federal or State standards, but were also tested for I
and were not detected in Lodi's wells: (Fur details of "Minimum Detection Levels" call the number on Page 3.)
m, p -Xylene
Dibromomethane
p4sopropyltoluene
0 -Xylene
1,3 -Dichlorobenzene (m -DCB)
Naphthalene
Bromobenzene
Dichlorodifluoromethane
n-Propylbenzene
Bromoch(oromethane
1,3-Dichloropropane
1,1,1,2 -Tetrachloroethane
Bromomethane (Methyl Bromide)
2,2-Dichloropropane
1,2,3-Trichlorobenzene
n-Butylbenzene
1,1-Dichloropropene
1,2,3-Trichloropropans
sec-Butylbenzene
Hexachlorobutadiene
1,2,4-Trimethylbenzene
tort-Butylbenzene
Bromodichloromethane
1,3,5-Trimethylbenzens
Chloroethane
Bromoform
Bromacil (Hyvar)
Chloromethane (Methyl Chloride)
Chloroform
Diazinon
2-Chlorotoluene
Dibromochloromethane
Prometryn (Caparol)
4-Chlorotoluene
Isopropylbenzene(Cumene)
City of Lodi, 1997 Annual Water Quality Report to Customers - April, 1998, Page 2
CITY OF LODI - PUBLIC WORKS DEPARTMENT
ANNUAL WATER QUALITY REPORT FOR 1997
(PART 2 OF 2)
Definition of terms and abbreviations
NA = Not Applicable NS = No Standard (MCL) Set ND = Not Detected at Minimum Detection Levels
MCL = Maximum Contaminant Leve) (State Standard) < Means "less than" the amount shown.
"Minimum Detection Level" means the minimum amount a laboratory can accurately detect.
Unless otherwise noted the results are given in milligrams per liter (mg/L or parts per million)
Results are only from wells which supplied drinking water in 1997.
Regulated Inorganic
Chemicals, mg/L
1995-1997 Data
Maximum Minimum Average
Contaminant Detection All Wells
Level (MCL) Level m91L
Range
High - Low
mg/L
Aluminum
0.2
0.05
<0.05
0.100 -ND
Antimony
0.006
0.0060
NO
NA
Arsenic
0.05
0.002
0.0046
0.0091 -ND
Barium
1.
0.1
0.060
0.17 -ND
Beryllium
0.004
0.0010
NO
NA
Cadmium
0.005
0.001
<0.001
0.00015 -ND
Chromium
0.05
0.01
<0.01
0.017 -ND
Cyanide
0.2
0.10
NO
NA
Fluoride
1.2
0.1
0.08
0.2 -ND
Lead
0.050
0.005
<0.005
0.0088 -ND
Mercury
0.002
0.0002
ND
NA
Nickel
0.10
0.010
NO
NA
Nitrate as N
10
0.4
1.7
4.7 -ND
Selenium
0.05
0.005
NO
NA
Silver
0.100
0.01
NO
NA
Thallium
0.002
0.0010
1 ND
NA
Secondary Standards
Aesthetic' Purposes
1995-1997 Data
Secondary
Standard
Minimum
Detection
Level
Average
of
All Wells
Range
High -Low
Chloride, mg/L
500
1
14
57-2.6
Color -Units
15
3
<3
5 - ND
Copper, mg/L
1.0
0.05
<0.05
0.16 -ND
Iron, mg/L
0.3
0.1
<0.10
0.110 -ND
Manganese, mg/L
0.05
0.005
<0.030
0.022 -ND
Odor -Threshold Units
3
1
ND
NA
Specific Conductance
umhos/cm
1600
1
310
660-100
Sulfate, mg/L
500
0.5
12
29-1
Surfactants
.(LAS,MBAS) mg/L
0.5
0.01
<0.01
0.095 -ND
Total Dissolved Solids
(TDS) mg/L
1000
1
217
440-100
Turbidity, NTU Units
5
0.1
<0.1
0.27 -ND
Zinc, mg1L
5.0
1 0.05
1 <0.050
0.018 -ND
Additional Constituents
Measured.
1995-1997 Data
Maximum
Contaminant
Level (MCL)
Minimum
Detection
Level
Average
of
All Wells
Range
High - Low
pH, Units -
NS
NA
7.6
7.9-7.1
Calcium, mg/L
NS
NA
27
71.6.2
Hardness
as CaCO3, mg/L a)
NS
NA
120
300-32
Magnesium, mg/L
NS
NA
13
303.9
Nitrite as N, mg/L
1
0.4
ND
NA
Potassium, mg/L
NS
NA
5.6
10-2.0
Sodium, mg/L
NS
NA
21
49.6
a) To calculate grains per gallon, divide by 17.1
Bacterial Water Quality,
Maximum
Minimum
Total
Monthly
Total Coliform Bacteria
Contaminant
Detection
%
High -Low
1997 Data (%)
Level (MCL)
Level
Positive
%Positive
Total Coliform, Positive
5%. /month
NA
1.4%.
4.7%-0%
Fecal Coliform
>1 /month
NA
0.00%
NO
Lead 8. Copper Rule
Maximum
Minimum
Average
Range of
Customer Tap Monitoring
Contaminant
Detection
90th
Individual
1992 Data (mg/L)
Level (MCL)
Level
percentile
Results
Lead, 90th percentile
0.015
0.001
0.0015
0.006 -ND
Copper, 90th percentile
1.3
0.02
0.26
1.3 -ND
Radioactivity,
Maximum
Minimum
Average
million fibers per Liter
pico Curies per Liter
Contaminant
Detection
of
Range
1996 -1997 Data
Level (MCL)
Level
All Wells
High - Low
Gross Alpha, pCi/L
15
NA
2.64
7.45-0.22
Asbestos
Maximum
Minimum
Result
million fibers per Liter
Contaminant
Detection
of system
1995 Data
Level (MCL)
Level
Analysis
Asbestos, mf/L
7
0.2
<0.0056
Aesthetic problems are only associated with taste, smell, and other problems which are not a health risk.
For any questions concerning these analytical results, contact:
Assistant Water/Wastewater Superintendent Frank Beeler at (209) 333-6740.
Experience a water quality problem?
- Many times water quality problems in the home can be traced to the hot water heater, the plastic water lines
under the sink to faucets, or because sewer gases from the drain are being smelled.
- Set the hot water heater at the proper temperature, too hot can create heavier scaling problems, and not warm
enough can allow bacteria to grow. Also remember, if you have a home treatment system, change the filter regularly.
- Other times there can be occasional water quality problems associated with the aesthetic quality of your water
or sand, which may be originating from water supply mains.
- If you ever experience trouble with the quality of your water, and you do not think it is a problem with your
on site plumbing, please call the Water/Wastewater Division at 368-5735, or 333-6740.
City of Lodi, 1997 Annual Water Quality Report to Customers - April, 1998, Page 3
Lodi's Water Conservation Ordinance
Remains in Effect in 1998
The drinking water supply for the City of Lodi is 100%
groundwater. Lodi has renewed its commitment to water
conservation to help preserve this valuable natural resource for
our future citizens. The Water Conservation Coordinator position
has been made full-time, rededicating Lodi's focus on in -school
education, public information, and compliance activities.
The water table under Lodi declined noticeably in our recent past.
During the six-year drought period, 1987 through 1992, the water
table lost 12 feet under Lodi according to City well readings! Since
the 1991-92 rain season, we have had five wet winters and only
one below normal. We have seen our groundwater regain only 5
feet. In the long run, we are clearly still using more than nature is
replenishing. It is nearly impossible to determine how much water
conservation efforts have helped, but the more we conserve, the
longer we can rely on this quality drinking water source and avoid
expensive surface water treatment. Some of Lodi's efforts to plan
for the future are summarized on page 1.
Peak Water Demands in Lodi
In the summers of 1995 and 1996 the City faced possible
shortages of well capacity. Thanks in a big part to your water
conservation efforts, there was never a need to tum on
emergency standby wells. The new 1 million gallon water storage
tank and pumping station came on line last summer with the peak
pumping capacity of three wells. This does not mean that an
unusually high water demand and/or a break down of well
equipment would not cause water demand problems in the future.
It is still prudent at this time for everyone to conserve water and
help shave peak water demands, this should become a normal
part of our lifestyle.
Peak water demands for the City of Lodi water system occur twice
daily, between 6 & 9 a.m. and again between 7 & 10 p.m.,
during the months of June, July, August, and September.
How Can You Help?
Some water uses during peak hours can be shifted to non -peak
hours, such as:
• Automatic timers for lawn/landscaping watering could be
set to end before 6 a.m., or start after 10 p.m.
• Perhaps the laundry could be put off until after 9 a.m. or
done before 7 p.m.
• Could water uses such as showering, car washing,
dishwashing, etc., be changed to non -peak hours?
• Some commercial/industrial water uses could be
changed to non -peak hours.
There are probably other good ideas you can come up with and
we'd like to hear them, call us at the number below. As a bonus,
simple changes in water use patterns can save everyone $$$.
It costs up to one-half million dollars ($500,000) to site, drill,
develop, equip, and connect a new well to the drinking water
system. If we can keep down our peak water demands in Lodi,
costs of some future wells can be avoided.
Please see the summary of water conservation regulations below.
If you have any questions on water conservation, our education
program, or for further information on reducing peak demands,
please call the Water Conservation Coordinator Orson Laam at
(209) 333-6829.
Thank you for past and continued cooperation.
City of Lodi - Water Conservation Ordinance Summary
Ordinance Requirements - Water waste includes but is
not limited to the following:
1. Allowing a controllable leak of water to go unrepaired.
2. Watering lawns, flower beds, landscaping, ornamental plants or
gardens except on watering days as follows:
Odd -numbered addresses on Wednesday, Friday and Sunday;
Even -numbered addresses on Tuesday, Thursday, and Saturday.
(WATERING IS NOT ALLOWED ON MONDAYS)
3. Watering between 10 a.m. and 6 p.m. from May 1 through
September 30 each year. (You may NOT water during these
high evaporation times.)
4. Washing down sidewalks, driveways, parking areas, tennis
courts, patios, other paved areas or buildings.
5. Washing any motor vehicle, trailer, boat, moveable equipment
except with a bucket. A hose (see # 6 below) shall be used for
rinsing only and for not more than three (3) minutes.
6. Use of a hose without a positive shut off nozzle.,, (NO OPEN HOSES)
7. Allowing excess water to flow into a gutter or ary drainage area
for longer than three (3) minutes.
8. Overwatering lawns or landscapes from November 1 through
February 28, or during and immediately after a rain.
Water Wasting Rates and Enforcement - Education and
cooperation is our first goal, but the following enforcement
procedures and charges will be followed for water waste.
Ast Water Waste - City will leave an information sheet describing the
waste so that it may be corrected.
-2nd Water Waste% City will give written notice requiring corrective action.
Within 12 months of a 1 st Water Waste
3rd Water Waste- City will give written notice, and a $35 charge will be
added to the next utility bill.' Within 12 months of a 2nd Water Waste
Ath Water Waste- City will give written notice, and a $75 charge will be
added to the next utility bill.' Within 12 months of a 3rd Water Waste
-5th and Subsequent Water Wastes'- City will give written notice, and
a $150 charge will be added to the next utility bill AND the City may require
a water meter and/or flow restrictor to be installed at the wasters expense.
' Wthin 12 months of the previous Water Waste.
If you have any questions, would like further information
concerning water conservation, or to report water waste,
please call the Water Conservation Office at 333-6829.
City of Lodi, 1997 Annual Water Quality Report to Customers, April 1998, Page 4
•. CITY OF LODI NOTICE OF PUBLIC HEARING
Carnegie Forum Date: August 19,1998
' 305 West Pine Street, Lodi Time: 7:00 p.m.
For information regarding this notice please contact:
Alice M. Reimche
City Clerk
Telephone: (209) 333-6702
NOTICE OF PUBLIC HEARING
NOTICE IS HEREBY GIVEN that on Wednesday, August 19, 1998 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 accept the required Public Health Goals Report.
All interested persons are invited to present their views and comments on this matter. Written statements
may be filed with the City Clerk 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, P.O. Box 3006, at or prior to the Public Hearing.
Alice M. Reimche
City Clerk
Dated: July 15,1998
Approved as to form:
-4c
Randall A. Hays
City Attorney
J.ICIrYCLRKIFORMS\NOTGEN. DOC 7/15158