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Charter Township of Grand BlancConsumer Confidence Report

2001

This report covers the drinking water quality for the Charter Township of Grand Blanc for thecalendar year 2001. This information is a snapshot of the quality of the water that we provided in200 1. Included in this report are details about where your water comes from, what it contains andhow it compares to Environmental Protection Agency (EP A) and state standards.

Our water comes from Lake Huron, (see map on page 4) which is considered a surface watersupply. An assessment of our source water will conducted by the Michigan Department ofEnvironmental Quality by 2003. We will infonn you on how to acquire this assessment reportwhen it becomes available.

Con~minants and their presence in water: Drinking water, and bottled water, may reasonably beexpected to contain at least small amounts of some contaminants. The presence of contaminalltsDOES NOT necessarily indicate that the water poses a health risk. More information aboutcontaminants and potential health effects can be obtained by calling the EP A's Safe DrinkingWater Hotline (800-426-4791).

Vulnerability of Sub Populations: Some people may be more vulnerable to cont~minant.~ indrinking water than the general population. Immuno-compromised persons such as chemotherapypatients. organ transplant recipients. those suffering from mv / AIDS or other immune systemdisorders. some elderly and infants can be particularly at risk from infections. These peopleshould seek advice about drinking water from their health care providers. EP AlCDC guidelineson appropriate means to lessen the risk of infection by cryptosporidium and other microbialcontaminants are available from the Safe Drinking Water Hotline (800-426-4791)

Contaminants that may be present in the source water include:

.

.

.

.

.

Microbial contaminants, such as viruses and bacteria, which may come from sewagetreatment plants, septic systems, agricultural livestock and wildlife.Inorganic contaminants, such as salts and metals, which can be naturally occurring orresult from urban storm water runoff, industrial or domestic wastewater discharges, oiland gas production, mining or famting.Pesticides and herbicides, which may come from a variety of sources such as agricultureand residential uses.Radioactive cont~minants, which are naturally occurring.Organic chemical contaminants, including synthetic and volatile organic chemicals,which are byproducts of industrial processes and petroleum production and can alsocome from gas stations, urban runoff, and septic systems.

In order to ensure that tap water is safe to drink, EP A prescribes regulations which limit theamount of certain contaminants in water provided by public systems. Food & DrugAdministration regulations establish limits for contaminants in bottled water which provide thesame protection for public health.

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Michigan Department of Environmental QualityDWRP Laboratory Services - Drinking Water Lab

USEPA Region V Drinking Water Lab Cert. No. MlOOOO3P.O. Box 30270, Lansing, MI 48909-7770

TEL: 517/335-8184 FAX: 517/335-8562

Report To:

Richard M AubinG4612 Beecher RoadAint MI 48532

System Name/Owner: GENESEE COUNTY WATER DEPT

Collection Address: 4612 Beecher Road, Flint 48532

Collected By: RICHARD AUBIN

Twp/SecfvVell #: AintlO4/?

County: Genesee

Sample Point KITCHEN

Sample Kit #: 32

Chlorination: Yes

'NSSN IPooIID: 2615

Source: Other

Site Code: OeM

Collector: County Personnel

Sample Date:

Received: 2/27/2002 11 :37:00AM

Purpose: Routine MonitorinQ

Water System: Treated Public Distribution

Test PerformedLimit MCL Rpt LimitTest Result

7 mg/l0.9 mg/L89 mg/LNot Detected0.4 mg/LNot DetectedNot Detected21 mg/L

Analyte Name Tested

CRACRACRACRACRACRACRACRA

4. 0 n'9il.

1 0 rT9'l1mg/l

lab Comments:None

Page: 1 of 12(28/2002 3:34:36PMBy authority of PA 368 of 1978 as amended Process Batch #: 2022884: 17

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Michigan Department of Environmental QualityDWRP laboratory Services. Drinking Water Lab

USEPA Region V Drinking Water lab Celt. No. MlOOOO3P.o. Box 30270, Lansing, MI 48909-7770

TEL: 517/335-8184 FAX: 511/335.aS62

Report To:

Richard M AubinG4612 Beecher RoadFlint MI 48532

System Name/Owner: GENESEE COUNTY WATER OEPT

Collection Address: G4612 Beecher Road. Flint 48532

Collected By: Richard M Aubin

TwplSec/Well #: FlintlO4l?

County: Genesee

Sample Point: KITCHEN

Samp!e Kit #: 36ME

Chlorination: Yes

'NSSN I PooIID: 2615

Source: Other

Site Code: OoM

Collector: County Personnel

Sample Date:

Received: 2/27/2002 11 :37:00AM

Purpose: Routine Monitorin.Q

Water System: Treated Public Distribution

Test PerformedTest Result

Not Detected0.001 mg/L

Not DetectedNot DetectedNot Detected

Not Detected

0.006 mg/L~I~. n ~.."'.., -~ -'..-'

Not Detected

Not DetectedNot Detected

Tested Umit MCL Rpt UmitAnalyte Name

CSBCASCBACBECCDCCRcpaCi-iGCNI

CSECTL

ANTIMONYARSENICBARIUMBERYLLIUMCADMIUMCHROMIUMLEAD BY ICP/MS. ';0 '"' IJ1:1V"', '~ ,...

NICKEL

SELENIUMTHALLIUM

0 ,..~., ,, -"

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0.1~0.05~0.002 /Y'g/l

lab Comments:

None

P~e: 1 of 11:06:46PMBy authority of PA 368 of 1918 as amended Process Batch #: 2040455: 36 4/4/2002

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3/ 13/2002

C2002019769

4612 Beecher Road, Flint 48532

Michigan Department of Environmental Quality

Official Laboratory Report

Test Result Analyte Name Tested Umit MCl Rpt Umit Test Pertonned

Not Detected DICHlOROPROPANE.1.2- 3/7fl002 0.005 mg/l 0.0004 mgil CXVO 19960701Not Detected DICHLOROPROPANE.1.3- 3/7fl002 0.001 mg/l CXVO 19960701Not Detected DICHLOROPROPANE.2.2- 3/7fl002 0.001 mg/l CXVO 19960701Not Deteded DICHLOROPROPENE.1.1- 3/7/2002 0.0005 mgil CXVO 19960701Not Deteded DICHLOROPROPENE.1.3-CIS 3/7fl002 0.0005 mgil CXVO 19960701Not Detected DICHlOROPROPENE.1.3-TRANS 3/7flOO2 O.OOO5mgil CXVO 19960701Not Detected ETHYLBENZENE 3/7fl002 0.7 mg/l O.OOO5mgil CXVO 19960701Not Detected FLUOROTRICHLOROMETHANE 3/7fl002 0.001 mg/l CXVO 19960701Not Deteded HEXACHLOROBUTADIENE 3/7fl002 0.0005 mgil CXVO 19960701Not Detected ISOPROPYL BENZENE 3/7fl002 0.0005 mgil CXVO 19960701Not Detected ISOPROPYL TOLUENE. PARA- 3/7fl002 0.0005 mgil CXVO 19960701Not Detected METHYL ETHYL KETONE 3/7fl002 0.02 n9l CXVO 19960701Not Detected METHYL ISOBUTYL KETONE 3/7fl002 0.005 mg/L CXVO 19960701Not Deteded METHYL TERT -BUTYL ETHER 3/7fl002 0.001 mg/L CXVO 19960701Not Deteded METHYLENE CHLORIDE 3/7fl002 0.005 mg/L O.O~ mgil CXVO 19960701Not Detected NAPHTHALENE 3/7fl002 0.001 mg/l CXVO 19960701Not Detected NITROBENZENE 3/7/2002 0.01 n9l CXVO 19960701Not Detected PROPYLBENZENE. NORMAL- 3/7fl002 O.OOO5mgil CXVO 19960701Not Detected STYRENE 3/7fl002 0.1 n9l O.OOO5mgil CXVO 19960701Not Detected TETRACHLOROETHANE. 1 ,1.1.2- 3/7/2002 O.OOOSmg/L CXVO 19960701Not Detected TETRACHLOROETHANE.1.1,2.2- 3/7/2002 0.0005 mg/L CXVO 19960701Not Detected TETRACHLOROETHYLENE 3/7fl002 O.OO5mg/L O.OOO4mg/L CXVO 19960701Not Detected TETRAHYDROFURAN 3/7fl002 O.OOSmg/L CXVO 19960701Not Detected TOLUENE 3/7fl002 1 mg/L O.OOO5mg/L CXVO 199607010.0084 mgiL TOTAL TRIHALOMETHANES 3/7/2002 0.10 n9l 0.0004 mg/L CXVO 19960701Not Detected TRICHLOROBENZENE.1.2,3- 3/7fl002 0.0005 mg/L CXVO 19960701Not Detected TRICHLOROBENZENE,1.2.4- 3/7/2002 0.07 mg/L 0.0005 mg/L CXVO 19960701Not Detected TRICHLOROETHANE.1,1.1- 3/7/2002 0.2mg/L O.OOO4mg/L CXVO 19960701Not Detected TRICHLOROETHANE.1.1.2- 3/7/2002 O.OO5mg/L O.OOO5mg/L CXVO 19960701Not Detected TRICHLOROETHYLENE 3I7fl002 0.005 mg/l 0.0004 mg/l CXVO 19960701Not Detected TRICHLOROPROPANE,1,2,3- 3/7fl002 0.0005 mg/l CXVO 19960701Not Detected TRIMETHYlBENZENE,1.2.4- 3/7/2002 0.0005 mg/L CXVO 19960701Not Detected TRIMETHYLBENZENE,1,3,5- 3/7/2002 0.0005 m~ CXVO 19960701Not Detected VINYL CHLORIDE 3I7fl002 0.002 mg/L 0.0005 mg/L CXVO 19960701Not Detected XYLENE. ORTHO- 3/7/2002 10 mg/L 0.0005 mg/L CXVO 19960701Not Detected XYlENE.META-&PARA- 3/7/2002 10 mg/L O.OOO5mg/L CXVO 19960701

lab Comments:Sample collection date was not given or incorrect date given. Results will be evaluated by regulating agency.

Page: 20f23/13/2002 3:54:48PMBy authority of PA 368 of 1978 as amended Process Batch #: 2031369: 1

or ground water would not seep intothe construction work.

W ater for treatment at theLake Huron Plant arrives via- a deep tunnel with the intake

offshoreundC2'45 feet of water.

Due to the lowered populationprojtttions. the initial output capacityof the plant was scaled back to 240MGD (300 MGD if all pumps arerunning). The 400 MGD can bereached by simply adding pumps. Toreach the 800 MGD level. a transmis-sion main. a sedimentation basin.pumps and filter sand would beneeded.

The six-mile Jong, 16-footdiameterrawwater tunnel systml and the LakeHuron Treatment Plant, located fivemiles north of the aty of Port Huron,were constructed in the early 70's.

For practical reasons and designeconomy, a raw water intake should bebuih at its ultimate or final desiredsize. Once a tonnel is in use, it is notfeasible to close it down and enlargeat a later date. Constructing twoSID all er di am et er tuDD e Is at di if er ent

times can be prohibitively expensive.Therefore, amathematical principleused was allowing tonnel flow volumeto be doubled without a tunneldiameter increase.

Anotha built-in advantage for eitherpopulation increases or folsecurityand reliability pmposes, allows anincrease in the tunnel's capacity to1.200 MGD simply by increasingintake velocities.

The m2iD tunnel is 200 feet below thesunounding ground surface. After a20- foot diameta vertical shaft wasconstructed at the plant gte, an 18-foot diam"eter horizontal hole wasboroo through antrim shale dcpositsby means of a mechanical mole - onemile to the lake shore and five milesout under the lake to a second verticalshaft.

For example, the Lake Huron plant wassized to produce 800 million gallons aday (MGD) of treated water. Phase Icalled for a plant one-half that size of400 MGD. A tunnel to supply Phase Iwould have been II-feet, 4-inches indiameter. A second tunnel wouldhave been required in the future.

This additional 400 MGD increase canbe made available under idealno-icing (i.e., summer) conditions.Howeva, to use this potentialcapacity on a permanent basis,additional pumps, treatment facilitiesand transmission mains would benecessary.

The second shaft as constrocted fromthe tunnel vaticalJy to the bottom ofthe lake using soil fre~ methods.The free-standing horizontal hole wasthen lined with a one-foot- thick layerof concrete resulting in the l6-footinside tunnel diameta.

By increasing the II-foot, 4-inchtunnel by only 4-feet, 8-inches (tothe 16-foot diameter size COnsb"Ucted),the tunnel's potential capacity wasincreased to 800 MGD. This was aninvestment in DWSD's future.

Construction of such facilities couldincrease the water system's reliabilityby providing alternate supplies toDWSD's two other downstream intakesystrms at Belle Isle and FightingIsland.

The shaft facilities at the plant sitewere constrocted using complex soilfreezjng techniques to insure that lake

DS4-LH-9/97

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DisinfectionPre & Post Chlorination Liquid chlorine to evaporators then gas

to V -not~h chlorinators

Turbidity RemovalChemicalFeed systemRate of Feed

Aluminum Sulfate (Aluminum Ion)3 Rotodip feeders0.5 to 660 Gallons per hour

Taste & Odor ControlChemicalFeed SystemRate of Feed

Powdered Activated Carbon3 Rotodip feedersRaw water conduits

SedimetationRapid Mix UnitsNumber of BasinsNumber of Flocculator

Paddle UnitsAocculation RotationBasin Retention Time

4 Vertical turbines2 Capacity 15 Million gallons each

20 units 8 paddlels eachVertical2.4 - 6.6 Hrs.

RltrationNumber of FiltersArea Per FilterFiltration CapacityWater Per Unitlength of Filter RunType of UnderdrainGravel layersGravel SizeFilter Media (Dual)Effective SizeUniformity CoefficientTroughs, Above AnthrafiltFrequency of BackwashWash Water Rateslength of WashSurface of Wash Units

202320 Square feetAverage = 14 MGD129,000 Gallons above the mediaAverage 30 hoursWheeler5 layers 14 inch deep reverse graded1/8- to 1- DiameterSand - Anthracite0.56mm - 0.9mm1.40 - 1.80

32 inches7 Per Day average5 & 60 MGD (2 - 28 inch rise/min.)

13 MinutesPalmer Sweeps

Wash Water SystemCapacityWash Water PumpsType of PumpType of MotorsSurface Wash

3 Pumps @ 60 MGD each3Johnson vertical single stageInduction 900 Horse powerHouse service used

~ patb per ~nwn . ~wcn c O~ per nWlUt8

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Grand Blanc TownshipDepartment of Public WorksG 5375 Saginaw StreetGrand Blanc, Michigan 48439