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    1 Laboratories

    5.0 (1 review)
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    Services - 1 Laboratories

    Environmental testing

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    Recommended Reviews - 1 Laboratories

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    2 years ago

    The lab was very helpful, they picked up samples from my project site, and the data was delivered on time and for rush analyses.

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    JLM Environmental - JLM Environmental

    JLM Environmental

    (421 reviews)

    Reasonable prices and a very professional, knowledgeable team. I first spoke with Cici for a…read morequote--she was so friendly and helpful that I decided to book right away. Alexis came to collect samples and called to confirm before arriving early. He did a very thorough test and was very respectful of my place. When I mentioned my home is shoe-free, he kindly put on shoe covers without hesitation. Fantastic team! Hopefully I won't need their services again, but if I do, I'll definitely return.

    This is the second time I've used JLM and I'd still recommend them. I'll list the pros and cons of…read moremy experience. Positives: Friendly customer service. Good communication and quick scheduling. I was able to have a technician come out the same day I called to schedule. The technician was extremely friendly and helpful. He answered all my questions while he was concentrating on the testing, set up etc. He was careful with his words meaning he didn't cause any unnecessary stress or anxiety. He wasn't pushy and was conscious of the cost while also recommending what samples are needed or suggested. He was clean and careful. Cons: Expensive compared to other mold testing companies. The invoice can quickly add up. I originally planned for about $800 ($500 base fee plus $75 for 4 samples). I added on asbestos test and that brought my bill to over $1300. In some ways I see this as a positive though because you get what you pay for (I hope and can't compare to any other company). My whole house wasn't moisture mapped as I was told it would be. The tech said they only focus on the reported areas of concern. Not a big deal but would've been nice to know. I kept getting rescheduled by 15 minutes. The tech was running late then running early so that was a little confusing. I jokingly asked them if I get compensation for the changed appt time since I signed the contract already (they charge $150 for any changes). They said no. The report is a bit confusing as it was the first time. The most annoying is that in the asbestos report they suggested further testing. Likely costing another $1000 or more. I thought I was already paying for the best testing. This feels a bit like a trick in some ways. Overall I'd go to JLM again. I suggest to do some research beforehand though to know exactly what you need done (AND WHY meaning are you renovating or just wanting to know for health reasons etc) so you don't get unneeded tests or costs.

    Marshall GeoScience - New grading project with a LID stormwater infiltration system

    Marshall GeoScience

    (4 reviews)

    Outstanding responsiveness and professionalism. I reached out to Marshall GeoScience through Yelp…read more Marshall (the principal engineer) replied quickly--even continuing the conversation well after business hours and offering to jump on a call. I wasn't exactly sure what I needed at first, and he was incredibly patient while I tried to explain the situation. Rather than guessing, he took the time to understand my goals, clarified that a firm estimate would require a defined scope of work, and laid out what that scope should look like so I could move forward confidently. What stood out most was his clear communication, transparency, and willingness to help without any pressure. I'd contacted a few other firms before him and had mixed results. Marshall was by far the most responsive and helpful. If you need a geotechnical engineer who is prompt, thoughtful, and genuinely focused on setting you up for success, I highly recommend Marshall GeoScience.

    Live in Santa Monica and our city planning department had a very unusual request for a soil…read moreengineering report that is not your typical report. I contacted a substantial number of other soil engineers who: -Didn't understand the request. -Said it was too small for them. -Were too busy. -Never responded. -Insisted on doing a massive (EXPENSIVE) report. One firm - Marshall - responded immediately, took the time to review the plans in detail, called the city, and got specific needs. He immediately came out, did the site inspection and within a week had a full report. And at a very reasonable cost. I cannot recommend Marshall GeoScience more highly -- exceptionally professional and willing to go the extra mile!

    1 Laboratories - environmentaltesting - Updated May 2026

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