/

Laura Barnthouse

<LBARNTHO@sonoma-count

y.org>

11/07/200803:37 PM

To Mary Maddux <MMADDUX@sonoma-county.org>, Ruth

Lincoln <RLI NCOLN@sonoma-county.org>, Randy Leach

<RLEACH@sonoma-county.org>

cc Dante Rodriguez/R9/USEPAlUS@EPA, Dana Volz

<dvolz@sonoma-county.org>, Michelle Arellano

<MARELLAN@sonoma-county.org>, Christine 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. Laura

Laura Barnthouse, R.E.H.S

Environmental Risk/Community Outreach Specialist

Department of Health Services

Environmental Health Division

475 Aviation Blvd., Suite 220

Santa Rosa, CA 95403

Phone: (707) 565-6511

Fax: (707) 565-6525

Email: Ibarntho@sonoma-county.org

SDMS DOCID# 1138652
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 of Cader Lane in 

Petaluma. This notice is being mailed to your constituents who own property within 1/4 

mile of this 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 of water 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 of your 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 of this 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 of water quality to their customers. 

If you 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 of water 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 of the 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 of considerations, 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 of exposure. 

(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 of any 

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 of Health 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 of SCDHS-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/ViewByEP AID/CAD981171523 ?OpenDo 

cument 

The mission of the 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 of animals 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 of the 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 of 400 milligrams of 1,1-dichloroethane per cubic meter of air (400 mglm3) 

for an 8-hour workday, 40-hour workweek. 

The National Institute for Occupational Safety and Health 

(NIOSH) and the American Conference of Governmental Industrial Hygienists (ACGIH) recommend the same exposure limit 

in air. 

NIOSH currently recommends that a level of 12,150 

mglm3 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 of a gram. 

References 

Agency for Toxic Substances and Disease Registry. 1990. 

Toxicological profile for 1,1-dichloroethane. Atlanta, GA: U.S. 

Department of Health 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 if you 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

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