CYNTHIA A. HARDING, M.P.H.
Interim Director

BOARD OF SUPERVISORS
Hilda L. Solis

JEFFREY D. GUNZENHAUSER, M.D., M.P.H.

First District

Interim Health Officer

Mark Ridley-Thomas

ANGELO J. BELLOMO, REHS, QEP

Sheila Kuehl

Second District

Deputy Director for Health Protection

Third District

3530 Wilshire Boulevard, Suite 1110

Fourth District

Los Angeles, California 90010

Michael D. Antonovich

TEL (213) 351-0397

Don Knabe

Fifth District

www.publichealth.lacounty.gov

December 1, 2016

Mr. Greg Stonick, General Manager
Aerocraft Heat Treating Company, Inc.
15701 Minnesota Avenue
Paramount, California 90723
Dear Mr. Stonick:
RE: RELEASES OF HEXAVALENT CHROMIUM FROM AEROCRAFT HEAT TREATING COMPANY, INC., CITY
OF PARAMOUNT
The Los Angeles County Department of Public Health is issuing the following Public Health Directive to
Aerocraft Heat Treating Company, Inc. ("Aerocraft").
On November 29, 2016, the South Coast Air Quality Management District (SCAQMD) filed a petition for
an order of abatement, which is attached hereto, with the District Hearing Board. Monitoring and testing
conducted by the SCAQMD indicated that Chromium 6 emissions near Aerocraft registered at hundreds
of times greater than typical background levels. Hexavalent chromium has been identified as a known
human carcinogen. SCAQMD has confirmed that Aerocraft is a source of elevated hexavalent chromium
emissions, and these emissions endanger the health of the public.
As such, Aerocraft is operating in violation of the California Health and Safety Code, and causing a public
nuisance that endangers the health of the surrounding community.
Pursuant to section 11.02.190 of the Los Angeles County Code, Aerocraft is hereby directed to:
1. Immediately take all necessary actions to eliminate the current nuisance endangering the health of
the public, which may include full or partial suspension of operations.
2. Notify the Department of Public Health within 24 hours of your intent to comply with this Directive,
and submit a list of actions taken, and proposed actions.

 Mr. Greg Stonick, General Manager
November 30, 2016
Page 2
The Department is working closely with SCAQMD to ensure the elimination of this endangerment without
delay. Please copy SCAQMD on your submittals to the Department. If you should have any questions,
please let me know.
Sincerely,

Cyrus Rangan, M.D., M.P.H.
Deputy Health Officer
Los Angeles County Department of Public Health