Quality Control
Sample Collection
Pricing Information
Contact Information
Company History
Staff Information


Sample Collection

When we receive your samples, you will be given an account number and your samples will be given a Lab I. D. number, which will follow them throughout their testing. When testing is complete, a full written report will be sent by fax and mail along with an invoice for the services performed.

Information to send with sample.

bulletCompany Name
bulletContact Name
bulletMailing Address
bulletPhone Number (s) where you can be contacted
bulletFax Number, if available
bulletEmail address
bulletPurchase Order Number (if needed by your Accounting Department)
bulletFacility Name
bulletName of Sample (s)
bulletType of Analysis to be Performed
bulletExplanation of problem areas or intended use.
bulletContact address if different than billing.

For samples originating from outside the USA, include our USDA Import Number, P330-16-00185. This number is needed for the sample to clear US Customs. You must also have the soil permit and soil import labels. All samples from outside the US will have a disposal fee associated with them.

Pointers on Shipping

bullet Please send one gallon of each sample to be tested.
bullet Pack the sample tightly inside the shipping container, newspaper works well. If it can move around it may break open.


Ship Samples to:

Thomas Turf Services, Inc.

11183 State Highway 30
College Station, TX  77845
Attn:  Bob Yzaguirre
Phone: 979-774-1600

Stock Pile Sample

When collecting samples for analysis, it is critical that the sample be representative of the entire stockpile, green, or other area being sampled. This can best be done by collecting numerous sub samples from the area and mixing them in a large container such as a clean 5-gallon bucket. After thorough mixing, you should remove and package the required amount of sample for submission. A detailed procedure for stockpile sampling has been assembled by the USGA & can be viewed by clicking HERE. One gallon volumes of gravel and/or sand per sample and one quart of organic amendment are needed. For soil fertility analysis, send one pint per sample. Water sample analysis requires two quarts of water. All material should be packed separately and securely. All lids should be taped to prevent accidental opening and spillage during shipment. Strong plastic bags inside strong cardboard boxes or metal cans are satisfactory. Each bag or container should be clearly marked on the outside with the sample name, facility name, and company name. Labels put inside bags are often ruined by the moisture of the soil. The more information that you can send, the better. If sending a pesticide contaminated sample, it should be packaged in a clean glass or metal container.

Core Profile

For existing facilities, you may want to send core profile samples. The best way to collect profile samples is to take an 18 inch length of 3 or 4 inch diameter PVC pipe. Bevel one edge to make a cutting edge, and put two half inch holes about 1 inch below the other end of the pipe. Place the pipe on the soil surface in the location to be sampled, lay a block of wood on top and drive the pipe into the ground to the desired depth. If possible, go through the root zone material, the gravel, and into the sub base. This plug of sub base material will help retain the sandy root zone mix in the tube while you pull it out of the ground. Slipping a piece of 3/8 inch rebar through the two holes in the upper end of the tube will make a convenient handle to use for pulling up the pipe. Once the core is out of the ground, stuff newspaper into the vacant portion of the pipe to prevent the soil core from shifting during the shipment and either tape the ends closed or tape end caps on the pipe. Label each pipe with the location sampled and which end is the top. The pipes may be shipped individually or you may put several in a box and send them as a single unit. If you only want to test the upper 4-6 inches of the profile, you can use a cup cutter to take a plug and put it directly into a plastic bag. Wrap and package these carefully to try to keep them intact during shipment. At least two cup cutter samples from each location will be necessary to provide adequate sample volume.

Water Sample

Water samples from the irrigation system can be taken from a hose plugged into a quick coupling connection on the golf course. Sampling should be conducted when the irrigation system is active to be sure that the sample is free of stagnant water and is representative of the water actually being applied to the golf course. Clean glass mason jars that are commonly used for home canning are commonly sold at grocery stores and make good sample containers. Avoid using used soft drink containers as they often contain large amounts of phosphorous. If sampling a lake or pond, samples should be taken at several locations and depths if possible. These should be composted together and a sample of the composite should be sent for analysis. If suspended material (sediments) is important then you may want to sample before and after a rainfall or other events that may alter the sediment load of the water.


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