Danielle Callahan, P.G., M.S. Owner/Professional Geoscientist Texas PG#15599, Louisiana PG#1419 Cell Phone: (713) 858-9498 Email: danielle@integrity-geo.com
Integrity Environmental Geoscience is a professional geoscience service founded on the belief that rigorous science and unwavering integrity are essential to responsible environmental management.
Specializing in technical report review, stamped deliverables, regulatory compliance support, and strategic environmental insights, we partner with clients to deliver defensible solutions that protect public health, natural resources, and our shared future. Guided by continuous professional development and a deep respect for the environments we serve, we are building a practice that balances technical excellence with thoughtful, sustainable progress.
With more than seven years of professional experience as a licensed Professional Geoscientist (Texas PG #15599, Louisiana PG #1419), Danielle Callahan, P.G. brings that same depth of insight and commitment to every project at Integrity Environmental Geoscience. Her background includes leading Phase I and Phase II Environmental Site Assessments, detailed soil and groundwater investigations at UST/AST and former E&P sites, advanced geophysical surveying, hydrogeologic characterization, aquifer testing, regulatory compliance, permitting, and corrective action planning across Texas, Louisiana, and Arkansas.
At Integrity Environmental Geoscience, Protecting Tomorrow with Unwavering Integrity Today is not merely a slogan. It is the guiding principle that shapes every assessment, every recommendation, and every stamped deliverable. True progress in our field comes not from speed, but from the courage to do things deliberately, ethically, and with a long view toward sustainability.
What subsurface challenges or hidden complexities have reshaped the way you approach environmental or geotechnical projects?
I would genuinely value your thoughts and experiences in the comments below. These conversations are how our profession advances and how we build stronger, safer communities together.
If your team is navigating complex regulatory requirements, site characterization needs, or the demand for defensible, high-integrity stamped reports, I invite you to connect. Let’s explore how we can protect tomorrow, today!
Contact me at:
Cell: 713-858-9498
Email: danielle@integrity-geo.com
Call at (713) 858-9498 to inquire about our services!
We love our customers, so feel free to visit during normal business hours.
Integrity Environmental Geoscience
Hours
Mon | 09:00 am – 05:00 pm | |
Tue | 09:00 am – 05:00 pm | |
Wed | 09:00 am – 05:00 pm | |
Thu | 09:00 am – 05:00 pm | |
Fri | 09:00 am – 05:00 pm | |
Sat | Closed | |
Sun | Closed |
Frequently Asked Questions
Please reach us at danielle@integrity-geo.com if you cannot find an answer to your question.
The mission of Integrity Environmental Geoscience is to provide innovative and sustainable solutions to environmental and ecological challenges, while promoting the conservation and restoration of natural resources.
In this current foundation-building phase of my practice, I am selectively offering expert technical report review, stamping, and certification services to strategic partners and clients who require the highest standards of scientific rigor and ethical accountability.
Danielle Callahan, P.G., Owner, is a licensed board certified Professional Geoscientist in Texas (TX PG#15599) and Louisiana (LA PG#1419). If your team is navigating complex regulatory requirements, site characterization needs, or the demand for defensible, high-integrity stamped reports, I invite you to connect. Let’s explore how we can protect tomorrow, today.
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