---
title: "David Biorato — Clean Truck Check, Merced, CA | CTC Finder"
description: "David Biorato in Merced, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing…"
url: "https://ctcfinder.com/tester/david-biorato-merced/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# David Biorato

Clean Truck Check tester in Merced, CA (Merced County).

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | Merced, CA 95341 |
| County | Merced County |
| Phone | (350) 204-9765 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks David Biorato can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Merced County

David Biorato is one of 40 testing businesses in Merced County on CARB's public tester list. 35 of them offer mobile testing and 12 do smoke opacity tests. In Merced itself there are 13 listed businesses, 12 of them mobile.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does David Biorato offer mobile Clean Truck Check testing?

Yes. David Biorato says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can David Biorato test a 2012 or older diesel truck?

Yes. David Biorato lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does David Biorato charge for a Clean Truck Check?

David Biorato has not published prices with us; call (350) 204-9765 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is David Biorato a CARB-credentialed tester?

David Biorato appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[Alden Hansard](https://ctcfinder.com/tester/alden-hansard-merced/)** — Merced, CA 95341 — (209) 777-3842 — 1 mi. Services: mobile testing, OBD testing.
- **[Best Electric](https://ctcfinder.com/tester/best-electric-merced/)** — 2160 Wardrobe Ave, Merced, CA 95341 — (209) 600-5568 — 1 mi. Services: mobile testing, OBD testing.
- **[Luis Nunez Rivas](https://ctcfinder.com/tester/luis-nunez-rivas-merced/)** — Merced, CA 95341 — (510) 965-3973 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Miguel Garcia-Villanueva](https://ctcfinder.com/tester/miguel-garcia-villanueva-merced/)** — Merced, CA 95341 — (209) 355-6459 — 1 mi. Services: mobile testing, OBD testing.
- **[N&S Tractor Merced](https://ctcfinder.com/tester/n-and-s-tractor-merced-merced/)** — 600 State Rte 59, Merced, CA 95341 — (209) 325-5169 — 1 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[Jnava Mobile Opacity Inspections](https://ctcfinder.com/tester/jnava-mobile-opacity-inspections-merced/)** — 35 W Main St, Merced, CA 95340 — (209) 226-2566 — 9 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.