Help! Excellent logo needed for Certified Lead Inspector

Lead Detection Service

I am a California certified Lead inspector/ Risk Assessor starting a new lead paint inspection business. The new EPA RRP rule has created a demand for certified lead professionals to provide lead paint testing and dust clearance services. I plan to service the San Francisco Bay Area by performing lead paint testing and dust clearance testing services for contractors, painters, and their customers on their residential projects which may contain lead based paint hazards. This service is fast, inexpensive, and insures their projects are free from lead contamination.

My target audience is the remodeling industry and homeowners who own/ live in houses built prior to 1978 when the use of lead based paints was halted. Businesses and their customers planning to remodel their homes need to know if lead based paint is present so they can take the appropriate measures to address the hazards presented by lead based paint. We test for lead based paint and lead dust with a state of the art, federally approved XRF Analyzer which accurately quantifies the presence of lead in paint. If our testing proves that lead based paints are not present it will save the building professionals and their customers time and money on their projects.

I want a professional looking logo that will convey the importance and seriousness of the services we perform. I want to be able to use this logo for signage, web-site, business cards, etc.
The logo should incorporate the business name, Lead Detection Service.
I don't have a preference for fonts or colors, they are the prerogative of the designer.
The initials LDS pretty much belong to the Church of Latter Day Saints, so I want to stay away from that.
Information about lead based paint hazards can be found at http://www.epa.gov/lead.
I'm definitely open to an icon, either abstract or related (magnifying glass maybe?)
The designs using the Periodic symbol for lead - Pb and the atomic number- 82 are very appealing.