Terraphase Engineering, Inc.
$1.60Mnot to exceed, approved on consent
33items approved on consent
33official Legistar records, all years
About this vendor
Terraphase is an environmental and engineering consulting firm founded in 2010. It offers environmental consulting, compliance, water resources and site engineering services to clients in industry, government, energy and utilities, real estate and other sectors. It is based in Oakland, California.
- Registered name
- Terraphase Engineering Inc.
- Type
- Company
- Website
- terraphase.com
- Phone
- 510-645-1850
- info@terraphase.com
- Address
- 1300 Clay Street, Suite 1000 Oakland, CA 94612
- SAM.gov UEI
MFB8MBN4FX54
Researched by AI from public sources on Oct 1, 2026, checked by a second, independent AI review, with every contact detail matched to a cited page. Not from OUSD or Legistar; may be incomplete or out of date. Sources: Contact Us - Terraphase, Company - Terraphase, Terraphase Engineering.
What the district contracts them for
Categories and action types are this tool's classification (AI-assigned, then checked), not Legistar fields. How this works.
Official information from Legistar
Legistar has no vendor profile; a vendor appears only as the vendor number on each record. These fields come from the official records listed at the bottom of this page.
- OUSD vendor number
004240- Named in the agenda text as
- Terraphase Engineering, Inc.; Terraphase Engineering Inc.; Terraphase Engineering
- Presenting offices
- Deputy Chief, Facilities Planning and Management (33)
- Record types
- Agreement or Contract (32); Motion (1)
- Funding sources
- 01 General Fund;; All Capitol Funds: 01 General Fund; 14 Deferred Maintenance 21 Building Fund 25 Developer Fees 35 County Schools Facilities 40 Special Reserve for Capital Outlay Projects; All Funds: 01 General Fund 14 Deferred Maintenance 21 Building Fund 25 Developer Fee 35 County Schools Facilities 40 Special Reserve for Capital Outlay Projects; All Funds: 01 General Fund; 14 Deferred Maintenance 21 Building Fund 25 Developer Fees 35 County Schools Facilities 40 Special Reserve for Capital Outlay Projects; Building Fund 21 Measure Y; Fund 12 Oakland Children's Initiative; Fund 21 Building Fund Measure Y; Fund 21 Building Measure Y; Fund 21 Measure J; Fund 21 Measure Y; Fund 21, Measure J; Fund 21/ Measure Y
- Resource / site codes
900/9350-1159350-2159650 1319655 1189655/1189655/2329655/97879657 1189657 3039657-1189657/1189657/3039658/3069658/3109681/161TBDTBD 900
Approved on the consent report (33)
- Sets up Terraphase Engineering as a civil engineering contractor for school sites, $0 committed nowSep 23, 2026 ·
R.-1·26-1736· Sep 24, 2026 – Jun 30, 2028 · Adopted on the General Consent ReportMulti-yearNo cost stated - Gives Terraphase another year on Garfield Elementary modernization at no added costJun 24, 2026 ·
R.-14·26-1296· May 15, 2025 – Jun 30, 2027 · Adopted on the General Consent ReportMulti-yearTime extension onlyNo cost stated - Adds $43,033 for Terraphase's extra soil vapor testing at Garfield ElementaryJun 24, 2026 ·
R.-16·26-1302· May 15, 2025 – Jun 30, 2027 · Adopted on the General Consent ReportRaises existing contractMulti-year+$43Knew total $164K - Sets up a no-cost master agreement with Terraphase for environmental site assessmentsJun 24, 2026 ·
R.-17·26-1304· Jun 25, 2026 – Jun 30, 2028 · Adopted on the General Consent ReportMulti-yearNo cost stated - Sets up a no-cost master agreement with Terraphase for geotechnical and geohazard consultingJun 24, 2026 ·
R.-18·26-1305· Jun 25, 2026 – Jun 30, 2028 · Adopted on the General Consent ReportMulti-yearNo cost stated - Sets up a no-cost master agreement with Terraphase for hazardous material abatement consultingJun 24, 2026 ·
R.-19·26-1309· Jun 25, 2026 – Jun 30, 2028 · Adopted on the General Consent ReportMulti-yearNo cost stated - Approves $61,750 for Terraphase's soil and geohazard review at the Washington Sankofa campusJun 24, 2026 ·
R.-35·26-1344· Jun 25, 2026 · Adopted on the General Consent Report+$62Knot to exceed - Adds $9,900 and six months for Terraphase's environmental support at Garfield ElementaryMay 27, 2026 ·
P.-5·26-1026· May 15, 2025 – Dec 31, 2026 · Adopted on the General Consent ReportRaises existing contractMulti-year+$10Knew total $121K - Pays Terraphase up to $173,640 for stormwater pollution consulting at Garfield ElementaryMay 27, 2026 ·
P.-6·26-1037· May 28, 2026 – Jun 30, 2029 · Adopted on the General Consent ReportMulti-year$174K - Pays Terraphase up to $256,762 for ground and hazard studies for the Paul Robeson Building demolitionMay 27, 2026 ·
P.-8·26-1045· May 28, 2026 – Dec 31, 2027 · AdoptedVoted on separatelyMulti-year$257K - Pays Terraphase up to $174,190 for environmental review of the Paul Robeson Building demolitionMay 27, 2026 ·
P.-12·26-1068· May 28, 2026 – Jun 30, 2028 · AdoptedVoted on separatelyMulti-year$174K - Hires Terraphase Engineering for $49,989 in soil and geohazard studies for Skyline High lighting projectApr 22, 2026 ·
P.-2·26-0687· Apr 1, 2026 · Adopted on the General Consent ReportAfter work began$50K - Hires Terraphase for $96,935 in stormwater pollution-control planning for the Coliseum College Prep expansionDec 10, 2025 ·
P.-1·25-2568· Dec 11, 2025 – Jun 30, 2028 · Adopted on the General Consent ReportMulti-year$97K - Adds $2,200 to Terraphase's Garfield Elementary contract for environmental review meetingsDec 10, 2025 ·
P.-8·25-2665· Adopted on the General Consent ReportRaises existing contract+$2Knew total $101K - Adds $2,200 to Terraphase's Garfield Elementary contract for more environmental servicesDec 10, 2025 ·
P.-9·25-2666· Adopted on the General Consent ReportRaises existing contract+$2Knew total $111K - Adds $55,534 to Terraphase's McClymonds High environmental review contract and extends it to 2027Dec 10, 2025 ·
P.-13·25-2681· Oct 24, 2024 – Dec 31, 2027 · Adopted on the General Consent ReportAfter work beganRaises existing contractLarge increaseMulti-year+$56Knew total $110K - Adds $85,722 to Terraphase's McClymonds High contract for a soil management planDec 10, 2025 ·
P.-19·25-2699· Adopted on the General Consent ReportRaises existing contractLarge increase+$86Knew total $196K - Adds $17,545 to Terraphase's traffic study for the Garfield Elementary modernization projectOct 8, 2025 ·
P.-1·25-2230· May 15, 2025 – Jun 30, 2026 · Adopted on the General Consent ReportRaises existing contractMulti-year+$18Knew total $99K - Adds $88,896 to Terraphase Engineering's environmental review for the Garfield Elementary modernizationSep 24, 2025 ·
P.-3·25-2088· May 15, 2025 – Jun 30, 2026 · Adopted on the General Consent ReportRaises existing contractLarge increaseText discrepancyMulti-year+$89Knew total $109K - Adds $91,493 and two years to Terraphase's toxic-site assessment work at McClymonds HighSep 24, 2025 ·
P.-9·25-2136· Oct 24, 2024 – Dec 31, 2027 · Adopted on the General Consent ReportRaises existing contractLarge increaseMulti-year+$91Knew total $110K - Adds $9,131 for Terraphase soil sampling at Garfield Elementary and extends its termSep 10, 2025 ·
P.-3·25-1954· May 15, 2025 – Jun 30, 2026 · Adopted on the General Consent ReportRaises existing contractLarge increaseMulti-year+$9Knew total $20K - Hires Terraphase Engineering for $10,670 in environmental site assessment at Garfield ElementaryMay 14, 2025 ·
M.-9·25-1018· May 15, 2025 – Dec 31, 2025 · Adopted on the General Consent Report$11K - Adds $9,300 and 68 days to Terraphase's environmental report work at McClymonds High SchoolMay 14, 2025 ·
M.-10·25-1022· Oct 24, 2024 – Dec 31, 2025 · Adopted on the General Consent ReportRaises existing contractLarge increaseMulti-year+$9Knew total $19K - Hires Terraphase Engineering for $81,381 in environmental review work at Garfield ElementaryMay 14, 2025 ·
M.-11·25-1055· May 15, 2025 – Dec 31, 2025 · Adopted on the General Consent Report$81K - Pays Terraphase Engineering $9,350 for environmental site assessment at McClymonds HighOct 23, 2024 ·
M.-2·24-2325· Oct 24, 2024 – Oct 24, 2025 · Adopted on the General Consent Report$9K - Pays Terraphase Engineering $55,534 for environmental review of McClymonds High modernizationOct 23, 2024 ·
M.-3·24-2356· Oct 24, 2024 – Oct 24, 2025 · Adopted on the General Consent Report$56K - Pays Terraphase Engineering $48,032 for environmental review work on Coliseum College Prep's modernizationOct 9, 2024 ·
M.-3·24-2283· Oct 10, 2024 – Sep 26, 2025 · Adopted on the General Consent ReportText discrepancy$48K - Pays Terraphase Engineering $50,914.00 for environmental review of Roosevelt Middle School's modernizationNov 16, 2023 ·
E.-8·23-2294· Nov 9, 2023 – Nov 9, 2027 · Adopted on the General Consent ReportAfter work beganMulti-year$51K - Adds $2,800 to Terraphase Engineering's Laurel Child Development Center contract, now $27,729Dec 1, 2021 ·
V1.-5·21-2685· Adopted on the General Consent ReportRaises existing contract+$3Knew total $28K - Hires Terraphase Engineering for $69,064 in environmental review for Laurel Child Development CenterMay 12, 2021 ·
V1.-3·21-0944· May 13, 2021 – Apr 28, 2024 · Adopted on the General Consent ReportMulti-year$69K - Hires Terraphase Engineering for $24,929 for soil assessment at Laurel Child Development Center siteMay 12, 2021 ·
V1.-7·21-0980· May 13, 2021 – May 27, 2024 · Adopted on the General Consent ReportMulti-year$25Knot to exceed - Extends Terraphase Engineering's agreement for Emerson's girls' softball field to March 2021Nov 12, 2020 ·
V2.-3·20-2060· Dec 12, 2019 – Mar 31, 2021 · Adopted on the General Consent ReportAfter work beganMulti-yearTime extension onlyNo cost stated - Hires Terraphase Engineering for $19,947 on storm water work at Emerson Elementary's softball fieldDec 11, 2019 ·
P.-14·19-2364· Dec 12, 2019 – Sep 27, 2020 · Adopted on the General Consent Report$20K
Other consent appearances (1)
Earlier appearances of items decided at a later meeting, and items not adopted or not yet acted on. These aren't counted in the totals above.
- Approves $50,914 for Terraphase Engineering environmental review for Roosevelt Middle modernizationNov 8, 2023 ·
U.-3· Adopted on the General Consent Report, Nov 16, 2023$51K
All Legistar records (33)
Every Legistar record carrying this vendor number in any year, on consent or not, plus records Legistar links to this vendor's consent items (for example, an amendment's original agreement). Newest first.
| Date | File | Official title | Type | Status |
|---|---|---|---|---|
| Sep 23, 2026 | 26-1736 | Oakland Unified School District Master Agreement for General Services – Terraphase Engineering, Inc. - Civil Engineering Consulting Services – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1552 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1344 | Amendment No. 1, Amendment for Project Assignment, Master Agreement for General Services – Terraphase Engineering, Inc. – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1119 · Related: 26-1305 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1309 | Oakland Unified School District Master Agreement for General Services – Terraphase Engineering, Inc.- Hazardous Material Abatement Consulting Services – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1105 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1305 | Oakland Unified School District Master Agreement for General Services – Terraphase Engineering, Inc.- Geotechnical and Geohazard Consulting Services – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1104 · Related: 26-1344 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1304 | Oakland Unified School District Master Agreement for General Services – Terraphase Engineering, Inc.-Environmental Site Assessment Consulting Services at Various School Sites Project – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1103 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1302 | Amendment No. 5, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1102 · Related: 25-1018, 25-1954, 25-2088, 25-2666, 26-1026 · Plain-English summary | Agreement or Contract | Passed |
| Jun 24, 2026 | 26-1296 | Amendment No. 3, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1100 · Related: 25-1055, 25-2230, 25-2665 · Plain-English summary | Agreement or Contract | Passed |
| May 27, 2026 | 26-1068 | General Services Agreement – Terraphase Engineering, Inc. – 1025 2nd Avenue Demolition Project (Paul Robeson Building) - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1012 · Plain-English summary | Agreement or Contract | Passed |
| May 27, 2026 | 26-1045 | General Services Agreement – Terraphase Engineering, Inc. – 1025 2nd Avenue Demolition Project (Paul Robeson Building) - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1011 · Plain-English summary | Agreement or Contract | Passed |
| May 27, 2026 | 26-1037 | General Services Agreement – Terraphase Engineering, Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1005 · Plain-English summary | Agreement or Contract | Passed |
| May 27, 2026 | 26-1026 | Amendment No. 4, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-1004 · Related: 25-1018, 25-1954, 25-2088, 25-2666, 26-1302 · Plain-English summary | Agreement or Contract | Passed |
| Apr 22, 2026 | 26-0687 | General Services Agreement – Terraphase Engineering, Inc. – Skyline High School Lighting Replacement Project- Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 26-0679 · Plain-English summary | Agreement or Contract | Passed |
| Dec 10, 2025 | 25-2699 | Amendment No. 3, Agreement for General Services – Terraphase Engineering, Inc. – McClymonds High School Modernization Project – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-2117 · Related: 25-1022, 25-2136 · Plain-English summary | Agreement or Contract | Passed |
| Dec 10, 2025 | 25-2681 | Amendment No. 1, Agreement for General Services – Terraphase Engineering, Inc. – McClymonds High School Modernization Project – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-2111 · Related: 24-2356 · Plain-English summary | Agreement or Contract | Passed |
| Dec 10, 2025 | 25-2666 | Amendment No. 3, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-2107 · Related: 25-1018, 25-1954, 25-2088, 26-1026, 26-1302 · Plain-English summary | Agreement or Contract | Passed |
| Dec 10, 2025 | 25-2665 | Amendment No. 2, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-2106 · Related: 25-1055, 25-2230, 26-1296 · Plain-English summary | Agreement or Contract | Passed |
| Dec 10, 2025 | 25-2568 | General Services Agreement - Terraphase Engineering, Inc. - Coliseum College Preparatory Academy - Site Expansion Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-2099 · Plain-English summary | Agreement or Contract | Passed |
| Oct 8, 2025 | 25-2230 | Amendment No. 1, General Services Agreement – Terraphase Engineering Inc. – Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-1734 · Related: 25-1055, 25-2665, 26-1296 · Plain-English summary | Agreement or Contract | Passed |
| Sep 24, 2025 | 25-2136 | Amendment No. 2, Agreement for General Services - Terraphase Engineering, Inc. - McClymonds High School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-1663 · Related: 24-2325, 25-1022, 25-2699 · Plain-English summary | Agreement or Contract | Passed |
| Sep 24, 2025 | 25-2088 | Amendment No. 2, General Services Agreement - Terraphase Engineering Inc. - Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-1658 · Related: 25-1018, 25-1954, 25-2666, 26-1026, 26-1302 · Plain-English summary | Agreement or Contract | Passed |
| Sep 10, 2025 | 25-1954 | Amendment No. 1, General Services Agreement - Terraphase Engineering, Inc. - Garfield Elementary School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-1551 · Related: 25-2088, 25-2666, 26-1026, 26-1302 · Plain-English summary | Agreement or Contract | Passed |
| May 14, 2025 | 25-1055 | General Services Agreement – Terraphase Engineering, Inc. – Garfield Elementary School Modernization Project- Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-0726 · Related: 25-2230, 25-2665, 26-1296 · Plain-English summary | Motion | Passed |
| May 14, 2025 | 25-1022 | Amendment No. 1, Agreement for General Services – Terraphase Engineering, Inc. – McClymonds High School Modernization Project – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-0725 · Related: 24-2325, 25-2136, 25-2699 · Plain-English summary | Agreement or Contract | Passed |
| May 14, 2025 | 25-1018 | General Services Agreement – Terraphase Engineering, Inc. – Garfield Elementary School Modernization Project- Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 25-0724 · Related: 25-2088, 25-2666, 26-1026, 26-1302 · Plain-English summary | Agreement or Contract | Passed |
| Oct 23, 2024 | 24-2356 | General Services Agreement – Terraphase Engineering, Inc. – McClymonds High School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 24-1988 · Related: 25-2681 · Plain-English summary | Agreement or Contract | Passed |
| Oct 23, 2024 | 24-2325 | General Services Agreement – Terraphase Engineering, Inc. – McClymonds High School Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 24-1987 · Related: 25-1022, 25-2136 · Plain-English summary | Agreement or Contract | Passed |
| Oct 9, 2024 | 24-2283 | General Services Agreement - Terraphase Engineering, Inc. - Coliseum College Preparatory Academy - Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 24-1876 · Plain-English summary | Agreement or Contract | Passed |
| Nov 16, 2023 | 23-2294 | Engineering Services Agreement – Terraphase Engineering, Inc. – Roosevelt Middle School- Modernization Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 23-1937 · Plain-English summary | Agreement or Contract | Passed |
| Dec 1, 2021 | 21-2685 | Amendment No. 1, Engineering Service Agreement - Terraphase Engineering, Inc. - Laurel Child Development Center Replacement Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 21-1963 · Plain-English summary | Agreement or Contract | Passed |
| May 12, 2021 | 21-0980 | Agreement for Engineering Services – Terraphase Engineering, Inc. – Laurel Child Development Center Replacement- Site Assessment Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 21-0780 · Plain-English summary | Agreement or Contract | Passed |
| May 12, 2021 | 21-0944 | Agreement for Engineering Services – Terraphase Engineering, Inc. – Laurel Child Development Center Replacement Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 21-0776 · Plain-English summary | Agreement or Contract | Passed |
| Nov 12, 2020 | 20-2060 | Amendment No. 1, Agreement for Engineering Services – Terraphase Engineering - Emerson Elementary School Girls’ Softball Field Project – Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 20-1688 · Plain-English summary | Agreement or Contract | Passed |
| Dec 11, 2019 | 19-2364 | Award of Contract for Consulting Services - Terraphase Engineering - Emerson Elementary School Girls' Softball Field Project - Division of Facilities Planning and ManagementDeputy Chief, Facilities Planning and Management · Enactment no. 19-1775 · Plain-English summary | Agreement or Contract | Passed |