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Laura Barnthouse <LBARNTHO@sonoma-count y.org> 1 1 /07/200803:37 PM To M a ry M addux < MMADDUX@ sonoma-co u nty.o rg > , Ruth Lin co ln < RLI NCOLN @ sonoma-co unty
. o rg >, Randy Leach < RLEAC H @ sonoma-co unty
. o rg > cc Dante Rodri g u ez/R9/USEPAl US @ EPA , Dan a Vo lz <dvolz @ sonoma-co unty
. org >, M ich e l le Arel l ano < MA R E LLAN @ sonoma-cou nty
. o rg> , Christi n e Sosko

Attached please find a Sonoma County Groundwater Contamination Response Plan notification for l/l-DCA on Cader Lane in Petaluma with a copy of the transmittal memo to the Board of Supervisors . Also attached is a map for your information. Please call if you have any questions. La ur a
Laura Barnthouse , R

. E

. H

. S E nvironm e ntal Ris k

/Co mmunity Outreach Speci alist Depa rtm e nt of H ealth Se rvi ces Environm e ntal H ealth Divis i o n 475 Aviati o n Blvd ., S u ite 220 Santa Rosa , CA 95403 Pho ne : (707) 5 65 -65 11 Fax: (707) 565-6525 Em ai l: Iba rnth o @sonoma-co u nty
. org

## CouNT)' of SoNOMA DEPARTMENT OF 

## HEALTH SERVICES



# Memora11dum
DATE: November 6, 2008 TO: District 2 - Supervisor Mike Kerns 

### Rita Scardaci, MPH- Director Ruth Lincoln, PHN, MA- Assistant Director



## Environmental Health Division Walter L. Kruse

- Director



### FROM: 

## RE: Walter L. Kruse, REHS, Director of Environmental Health

# ~V
Groundwater Contamination Response Plan Notification

For your information, attached is a copy of a notification that is being sent as a result of a groundwater contamination detection of 

### 1, I-DCA in the 

### 1500 block ofCader Lane in Petaluma. This notice is being mailed to your constituents who own property within 1/4 

### mile ofthis detection, with duplicate mailings eliminated. Also attached, for your information, is a map denoting the exact location of this detection. If you have any questions, please feel free to contact me at 565-6522.

cc: Mary Maddux-Gonzalez, M.D., M.P.H. Health Officer, Public Health Division Director Ruth Uncoln, PHN, MA Assistant Director, Department of Health Services Randy Leach, Well & Septic Division Manager Permit and Resource Management Department 

### Dante Rodriguez EPA Site Manager, USEPA Region 9



### 475 Aviation Blvd., Suite 220, 

### Santa Rosa, CA 95403 • 

### phone (707) 

### 565-6565 • 

### fax (707) 

### 565-6525 • www.sonoma-county.org

## CouNry of SoNOMA DEPARTMENT OF 

## HEALTH SERVICES

November 6, 2008 Rita Scardaci, MPH- Director Ruth Lincoln, PHN, MA- Assistant Director



## Environmental Health Division Walter L. Kruse

- Director 

### Tracking #0811 0602
Este es un aviso sobre Ia posible contaminacion del aqua de su pozo. Este aviso aplica solamente a los habitantes de las propiedades que obtienen agua de un pozo privado. Si quiere esta informacion en espaiiol, por favor llame al (707) 565-6565. 

# Notice of Potential Groundwater Contamination
This notice is being distributed to inform you ofwater quality testing results obtained from a groundwater sample in your neighborhood. There has been a detection of:

o 9.0 ppb (parts per billion) 1,1-Dichloroethane (1,1-DCA) in groundwater from a monitoring well located within 114 mile ofyour property in the 1500 block of Cader Lane in Petaluma. An 

### information sheet about this chemical from the federal Agency for Toxic Substances and Disease Registry (ATSDR) is enclosed. For further information about the site or potential source ofthis contamination, please contact the United States Environmental Protection Agency at (415) 972-3166, referring to the Sola Optical Superfund site. For health information, please contact Sonoma County Department of Health Services, Division of Environmental Health. Public drinking water supplies operate under governmental permit and are tested to ensure that water quality meets state standards. Public water system operators are required, at least once each year, to provide a notice ofwater quality to their customers. Ifyou are on a public water supply (i.e. you get a water bill each month) and do not have a well, this letter does not apply to you. The quality ofwater from private wells is not regulated by government agencies. The only way to be sure that your well water is safe to drink and use is to have it tested. On the reverse is a list of local laboratories certified by the State of California to perform water quality testing. While the standards established for public drinking water systems are not enforceable for private well water, they can provide a parallel indication ofthe quality and safety of water that comes from private wells. Standards associated with public drinking water supplies are:

• MCL is the Maximum Contamination Level permissible 

### in public drinking water supplies. MCLs are established based on a number ofconsiderations, including health risk, technological feasibility, treatment costs to water systems, and public hearings. • PHG is the Public Health Goal established for public drinking water based on health risk assessment alone and is the level at, or below which, health effects are not expected to occur from a lifetime ofexposure. (over)

475 Aviation Blvd., Suite 220, Santa Rosa, CA 95403 • 

### phone (707) 565-6565 • 

### fax (707) 565-6525 • www.sonoma-county.org

### Sonoma County, operating under the Sonoma County Groundwater Contamination Response Plan, believes that its citizens should be promptly informed ofany contamination in groundwater occurring above the PHG that may present a potential threat to public health. Following is a chart showing the established standards for public drinking water systems for the chemical discovered 

### in the groundwater contamination at this site.


### 1,1-DCA (ppb) 

### Amount Detected 9.0 MCL 

## 5.0 PHG 3.0


## WHERE CAN I HAVE MY WATER TESTED? Water should be tested at a laboratory certified by the State of California. Certified laboratories located in or near Sonoma County include the following: ALPHA ANALYTICAL 208 Mason Street Ukiah, CA 95482 (707) 468-0401 

### BRELJE & 

### RACE 425 South E Street Santa Rosa, CA 95404 (707) 544-8807

For more information: 

### Water quality, wells or potential health risks: ANALYTICAL SCIENCES 110 Liberty Street Petaluma, CA 94952 (707) 769-3128 

### CAL TEST ANALYTICAL 1885 North Kelly Road Napa, CA 94558 (707) 258-4000

Sonoma County Department ofHealth Services, Environmental Health Division 475 Aviation Blvd., Suite 220, Santa Rosa, CA 95403 (707) 565-6565 www.sonoma-county.org/health/eh/water

_quality.htm The goal ofSCDHS-EH is to protect public health and the environment through education, regulation and a cooperative working relationship with the community. 

### Groundwater investigation and cleanup: USEPA Region 9, SFD-7-1 75 Hawthorne Street San Francisco, CA, 94105 (415) 972-3166 http://yosemite.epa.gov/r9/sfund/r9sfdocw.nsf/ViewByEPAID/CAD981171523 ?OpenDo cument The mission ofthe Environmental Protection Agency is to protect human health and the environment.

# ATSDR

AGENCY FOR TOXIC SUBSTANCES AND DISEASE REGISTRY 

# 1,1-DICHLOROETHANE CAS # 

# 75-34-3
Agency for Toxic Substances and Disease Registry ToxFAQs July 1999



### This fact-sheet answers the most frequently asked health questions (FAQs) about 1,1-dichloroethane. For
more information, call the ATSDR Information Center at 1-888-422-8737. This fact sheet is one in a series of summaries about hazardous substances and their health effects. This information is important because this substance may harm you. The effects of exposure to any hazardous substance depend on the dose, the duration, how you are exposed, personal traits and habits, and whether other chemicals are present. 

## IDGHLIGHTS: 1,1-Dichloroethane is used to make other chemicals and to dissolve and remove grease. Breathing very high levels can affect your heart and animal studies have seen kidney disease from long-term exposure to high levels in air. 1,1-Dichloroethane has been found in at least 248 of the 1,430 National Priorities List sites identified by the Environmental Protection Agency (EPA).

What is 1,1-dichloroethane? (Pronounced 1,1-di' klor' 

### o**~th'** 

### an') 1,1-Dichloroethane is a colorless, oily liquid with a sweet odor. It evaporates easily at room temperature and bums easily. It does not occur naturally in the environment. In the past, 1,1-dichloroethane was used as a surgical anesthetic, but it is no longer used this way. Today it is used primarily to make other chemicals, to dissolve substances such as paint, varnish, and finish removers, and to remove grease.


### What happens to 1,1-dichloroethane when it enters the environment? 0 1,1-Dichloroethane is released from industrial processes primarily to the air. 0 I, 1-Dichloroethane evaporates from water rapidly into the air. 0 It can also be found in the air as a breakdown product of another chemical, 1, 1, !-trichloroethane. 0 1, 1-Dichloroethane does not dissolve easily in water. 0 Small amounts of 1, 1-dichloroethane released to soil can evaporate into the air or move into groundwater. 0 It is not known how long it stays in soil. 0 1,1-Dichloroethane is not expected to build up in the body tissues of animals.


### How might I be exposed to 1,1-dichloroethane? 0 Breathing air containing it from industrial releases or hazardous waste sites. 0 Drinking contaminated tap water. 0 Touching soil containing it. 0 Touching contaminated materials in the workplace.


### How can 1,1-dichloroethane affect my health? Very limited information is available on the effects of 1,1-dichloroethane on people's health. The chemical was discontinued as a surgical anesthetic when effects on the heart, such as irregular heart beats, were reported.

U.S. DEI':\H.Ti\IENT OF IIE:\LTII :\ND IIUi\L\N SEitVICES, Public**ll~alth** Scnicc**:\~l'IIC)** fur Toxic**Suh.~lanccs** and nisease ){egistry

# Page 2 

# 1,1-DICHLOROETHANE CAS# 75-34-3
ToxFAQs Intcmct address via WWW is http://www.atsdr.cdc.gov/toxfaq.html

Studies in animals have shown that 1,1-dichloroethane can cause kidney disease after long-term exposure to high levels in air. Delayed growth was seen in the offspring ofanimals who breathed high concentrations of the chemical during pregnancy. 

### How likely is 1,1-dichloroethane to cause cancer? The Department ofHealth and Human Services (DHHS), the International Agency for Research on Cancer (IARC), and the EPA have not classified 1,1-dichloroethane for carcinogenicity. 1,1-Dichloroethane caused cancer in one study in which rats and mice were fed large doses ofthe chemical for their lifetimes.


### Is there a medical test to show whether I've been exposed to 1,1-dichloroethane? Tests are available that measure 1,1-dichloroethane in urine, blood, breath, and body tissues. These tests aren't available at**m~st** doctors' offices, but can be done at a special laboratory that has special equipment The tests must be done soon after exposure occurs, because most of the 1,1-dichloroethane that is taken into the body leaves within 2 days. In addition, these tests cannot tell you when you were exposed, or whether health effects will occur.


### Has the federal government made recommendations to protect human health? The EPA requires that spills or accidental releases into the environment of 1,000 pounds or more of 1,1-dichloroethane be reported to the EPA. The Occupational Safety and Health Administration (OSHA) has set an occupational exposure limit of400 milligrams of 1,1-dichloroethane per cubic meter ofair (400 mglm3 ) for an 8-hour workday, 40-hour workweek. The National Institute for Occupational Safety and Health (NIOSH) and the American Conference ofGovernmental Industrial Hygienists (ACGIH) recommend the same exposure limit in air. NIOSH currently recommends that a level of 12,150 mglm 3 be considered immediately dangerous to life and health. This is the exposure level of 1,1-dichloroethane that is likely to cause permanent health problems or death. The federal recommendations have been uipdated as of July 1999. 

### Glossary Anesthetic: A substance used to cause numbness. Carcinogenicity: Ability to cause cancer. CAS: Chemical Abstracts Service. Evaporate: To change into a vapor or gas. Milligram (mg): One thousandth ofa gram. 

### References Agency for Toxic Substances and Disease Registry. 1990. Toxicological profile for 1,1-dichloroethane. Atlanta, GA: U.S. Department ofHealth and Human Services, Public Health Service.



### Where can I get more information? For more information, contact the Agency for Toxic Substances and Disease Registry, Division of Toxicology, 1600 Clifton Road NE, Mailstop F-32, Atlanta, GA 30333. Phone: 1_-888-422-8737, FAX: 710-488-4178. ToxFAQs Internet address via WWW is http://www.atsdr.cdc,gov/toxfaq.html ATSDR can tell you where to find occupational and environmental health clinics. Their specialists can recognize, evaluate, and treat illnesses resulting from exposure to hazardous substances. You can also contact your community or state health or environmental quality department ifyou have any more questions or concerns.

Federal nee) cling Prugram 

# 0 Printed on necyclcd Paper

# Sola Optical (former), 1500 Cader Lane, Petaluma APN 005-040-056 http://sv-gis/output/ScampMap1.pdf

legend LUS T 

# • TANK LOCATION CLOSCO 

# • TANK LOCAT'ION OPOI 

# • OP£N

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# • CLOS£DSrTE 

# • LAKE SONOMA 

## ;V MAJOR HIGHWAYS 

### ;V STREETS 

### ;V RIVERS 

### ;V USGS STREAMS 

## 0 GIS PARCELS 

## 0 County Boundary Color Onllo (081200•) Black and V\lhite Aerials (May 2000)