Mail Hay Tests To:

Sierra Testing Services

9450 E. Collier Rd

Acampo, CA 95220

Are you a new client?

What to Include with Test(s):

*See Sample ID Tags*

- Your billing information

- Phone number

- Preferred method of        obtaining results (fax,      email, etc.)

- Sample ID

- Product type

- Test to be run

>Equine program      tests must be  specifically labeled!

>Grasses ONLY!


STS  is contracted with Dairyland Laboratories in Arcadia, Wisconsin for wet chemistry analysis. Several packages are available. Dairyland results may take 7-10 days to be received. Due to an increase in processing fees, Nitrate testing is a flat rate of $15. For pricing on all other tests please contact us for your needs.

If you are submitting a sample for retesting, the sample must be labeled as follows in order to avoid being submitted and charged as a new test.
- Must indicate that it is a retest
- Original Sample Number (indicated on provided analysis)
- Original Sample ID

$4.00 per sample fee for using the drop box service


 Samples are picked up Monday through Friday. Please note the time change for pick up for each box. Samples are received the next morning around

10:00 AM, except Friday's pick up is delivered the following Monday.

Drop Off Before 6:00 PM


Joe Heidrick's

36826 County Rd 24

Woodland, CA

Drop Off Before 6:00 PM

VanGroningen’s Scale

Corner of Jack Tone & French Camp Rd in Escalon, CA

** Maps for STS and Drop Boxes are located on the “Helpful Links & Maps” Page

SIERRA TESTING SERVICE:  9450 E. Collier Rd.  *  Acampo, CA 95220  *  209-333-3337 *

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Hours Of Operation

Monday - Saturday   8:00 AM - 5:00 PM

*Please call prior to Saturday testing*

Sunday                      Closed