Positive Lab Service is a highly specialized firm providing superior quality analytical services to the environmental industry in the compliance, assessment and remediation fields.

Today, Positive Lab Service (PLS) has emerged from its original 5 person staff to a team of professionals with an average tenure of 19 years, honing the skills necessary to find the best ways to develop and test and provide our clients with unmatched industry knowledge.

781 East Washington Blvd; Los Angeles, Ca. 90021; P - (213) 745-5312

We are the preferred laboratory for rapid response needs. Same day turn-around time services available as needed. Our uncompromising commitment to quality ensures strict compliance with critical standards.

Positive Lab Service is a leader in the supply of high quality analytical services to the environmental industry in the compliance, assessment and remediation fields. Satisfied clients perpetuate the success of Positive Lab Service.

Positive Lab Service has extensive experience analyzing hazardous substances in water, soil, solid waste, wastewater, waste oil, sludge, sediment and solvents. Positive Lab Service is committed to providing clients with accurate analysis and prompt turnaround time.

Positive Lab Service has been located at 781 East Washington Boulevard in downtown Los Angeles, California for more than 40 years. The facility, completely remodeled in 1991, comprises 6600 square feet of total space, of which 4000 square feet is laboratory space.

Positive Lab Service understands the importance of delivering defensible data, on time, to the United States government. Below are some representative projects illustrating our government project experience.

At Positive Lab Service we strive to consistently provide high quality data that is accurate, precise, legally defensible in a timely mannerwith a personalized customer service for a wide range of analytical testing services.

Positive Lab Service 108.207 001 Biochemical Oxygen Demand SM 5210 B-2011 108.211 001 Chemical Oxygen Demand SM 5220 C-2011 108.225 001 Surfactants SM 5540 C-2011 Field of Accreditation:109 - Metals and Trace Elements in Non-Potable Water 109.623 001 Aluminum EPA 200.7 109.623 002 Antimony EPA 200.7 109.623 003 Arsenic EPA 200.7