I read this as: California Service Station Equipment Contractors (CSLB D-40) in CA.
The same question as a structured link: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA

LocationLists: California Service Station Equipment Contractors (CSLB D-40), state = CA

130 contractors match (135 listings, 5 duplicates removed).

The file is the list as published. Add the essentials (county population, median household income and median age) or a group of area data to every row below.
Add more area data to every row (each link reloads this answer with those columns added, and the buy link then delivers them):
- Add the essentials: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:population,median_household_income,median_age
- Census demographics: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:population,households,median_household_income,median_age,pct_65_plus,pct_bachelors_plus,housing_units,owner_occupied_share,median_home_value,population_estimate,population_growth_since_2020,pct_under_18,pct_5_to_14,pct_households_with_people_under_18
- Business activity by industry: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:establishments,employees,agriculture_establishments,mining_establishments,utilities_establishments,construction_establishments,manufacturing_establishments,wholesale_trade_establishments,retail_trade_establishments,transportation_establishments,information_establishments,finance_establishments,real_estate_establishments,professional_establishments,management_establishments,administrative_establishments,educational_services_establishments,health_care_establishments,arts_establishments,accommodation_establishments,other_services_establishments
- Weather normals: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:january_high,july_high,annual_high,january_low,july_low,annual_low,annual_precipitation,annual_cooling_degree_days,annual_heating_degree_days,hottest_month_high,coldest_month_low,annual_snowfall,annual_days_of_highs_reaching_90_f,annual_days_of_highs_reaching_100_f,growing_season_length_20f_50pct
- Storms: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:flash_flood_events,flood_events,hail_events,high_wind_events,hurricane_events,lightning_events,thunderstorm_wind_events,tornado_events,wildfire_events,winter_storm_events,strong_tornadoes,storm_injuries,storm_deaths,storm_property_damage,storm_crop_damage
- Drought: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:palmer_drought_severity_index,palmer_hydrological_drought_index,modified_palmer_drought_index,palmer_z_index,palmer_drought_severity_index_2025,palmer_hydrological_drought_index_2025,modified_palmer_drought_index_2025,palmer_z_index_2025
- Building stock: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&area_columns=county:buildings,multi_story_buildings,mid_rise_buildings,high_rise_buildings,buildings_4_floors_plus,buildings_8_floors_plus,share_with_floors_published,share_with_height_published,building_footprint_area,estimated_floor_area,average_building_height,tallest_building_height
This list is sold whole.
Buy the whole list — 139 rows · $9 (card, no account needed): https://locationlists.com/data/california-fuel-system-contractor-list/buy?src=find
Email me this quote (free, pay later): https://locationlists.com/find/quote?dataset=california-fuel-system-contractor-list&state=CA

Preview (3 fixed sample row(s) from these lists, the same for every question — not a sample of your 130 matches):
- Norcal Petroleum Tank Testing · 25568 N Hwy 99, Acampo, CA 95220 · (209) 712-6366 [california-fuel-system-contractor-list] — matches your question
- S M E Solutions Llc · 2800 NW 31st Ave, Portland, OR 97210 · (800) 346-8487 [california-fuel-system-contractor-list] — does not match your question
- Veeder Root Company · 125 Powder Forest Drive, Simsbury, CT 06070 · (860) 651-2700 [california-fuel-system-contractor-list] — does not match your question

Where the matches are, by ZIP code (counts only, no names or contact details; 114 ZIP codes):
- 93065: 4
- 91764: 3
- 92867: 3
- 90744: 2
- 91335: 2
- 91605: 2
- 91710: 2
- 91761: 2
- 91763: 2
- 92025: 2
- and 104 more ZIP codes (see https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&format=json)
Free map of these counts: https://locationlists.com/find/map?dataset=california-fuel-system-contractor-list&state=CA

Left out:
- California Service Station Equipment Contractors (CSLB D-40): 135 match, but at 139 records this dataset is sold only as the whole file ($9).

Other ways to ask this:
- Counts per county instead of rows: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&areas=county
- Counts per ZIP code instead of rows: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&areas=zip
- Every General & Building Contractors list in the same area: https://locationlists.com/find?category=general-contractors&state=CA
- The nearest Texas Registered UST Contractors (TCEQ) to each one, with miles: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&relate=nearest&k=1&b.dataset=texas-ust-contractor-list&b.state=CA

Technical details (developers and AI agents): JSON: https://locationlists.com/find?dataset=california-fuel-system-contractor-list&state=CA&format=json · Nothing is charged until checkout is paid.