SpendingContractsPurchase order

What has the City paid on purchase order SC50CO25145660M?

$4.18M paid to Larry Walker Associates Inc across 49 payments from December 18, 2024 to September 1, 2026, charged to Non-Departmental / PW-Sanitation Expense and Equipment.

Checkbook LA · Updated Sep 22, 2026RAMP awards · Updated Oct 2, 2026

What it was for

PW-Sanitation Expense and Equipment

Budget line carrying the most money, of 5 this order is charged to.

Order description, as published:

A-564, ADD CL#1 AL#1, $650,000.00, SHWX0019

Approval records

  • Contract C-145660Award recorded in the City's procurement portal; see below.

Order dated November 21, 2024.

Paid from

Stormwater Pollution Abate FND

restricted revenue (grants, fees or a dedicated tax) that can only be spent on this purpose — not general-fund tax dollars.

Department: Non-Departmental

Awarded and paid so far

The City's procurement portal, RAMP, records contract C-145660 (the number embedded in this order's number, SC50CO25145660M) as awarded to Larry Walker Associates, Inc. for $8.8M (task order solicitation), effective June 17, 2025 and expiring June 30, 2029. This order has paid $4.2M, 47% of that figure.

The award amount and dates are as entered in RAMP; later amendments that change a contract's ceiling or term are not always reflected there, and a contract can be paid through orders not shown on this page. RAMP title: “SPECIALIZED AND EXPERT REGULATORY SERVICES (TOS S-002)”. See the award on RAMP

Every payment, in order

Payment requests are numbered sequentially by the City, so the order here is the order they were approved. Several requests clearing on one day usually means invoices were held and released together.

#PaidInvoicedLagReferenceAmount
1December 18, 2024December 11, 20247dINV#145660-S-004B-1,TOS S-004B, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES,7/23/2024-8/31/2024$7,514
2December 27, 2024December 12, 202415dINV# 145660-S-004B-3, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES, 09/02/2024-10/31/2024$49,750
3December 27, 2024December 12, 202415dINV#145660-S-004B-2, TOS S-004B, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES, 8/5/2024-9/30/2024$19,709
4February 3, 2025January 14, 202520dINV# 145660-S-004B-4, TOS S-004B, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES,10/4/24-11/27/24$57,986
5February 21, 2025February 13, 20258d50/511/ 50V565; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$123,902
6March 3, 2025February 27, 20254d50/511/ 50V566; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$80,000
7March 3, 2025February 27, 20254d50/511/ 50V565; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$26,098
8March 3, 2025February 27, 20254d50/511/ 50W554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$8,064
9March 10, 2025March 6, 20254d50/511/ 50W554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$141,428
10March 17, 2025March 12, 20255d50/511/ 50W565; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$99,649
11March 17, 2025March 12, 20255d50/511/ 50W554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$460
12April 1, 2025March 17, 202515dINV# 145660-S-004B-5, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES, 9/25/2024-12/31/2024$121,430
13April 2, 2025March 19, 202514d50/511/ 50W565; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$150,352
14April 2, 2025March 19, 202514d50/511/ 50Y554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$16,580
15April 16, 2025April 15, 20251d50/511/ 50Y565; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$209,451
16April 16, 2025April 15, 20251d50/511/ 50Y554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$142,920
17April 16, 2025April 15, 20251d50/511/ 50W554; TOS S-004A COMPREHENSIVE MONITORING & SPECIALIZED SERVICES FOR CIMPS & TMDLS$48
18June 3, 2025May 20, 202514dINV# 145660-S-004B-6, HWRP-SPECIALIZED AND EXPERT REGULATORY SERVICES, 09/10/2024-01/31/2025$288,770
19September 9, 2025June 30, 202571d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$40,886
20October 10, 2025September 25, 202515d511/50/50A565; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$150,492
21October 10, 2025September 25, 202515d511/50/50A565; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$115,264
22October 10, 2025September 25, 202515d511/50/50A565; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$88,590
23October 10, 2025September 25, 202515d511/50/50A565; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$45,654
24October 10, 2025September 25, 202515d511/50/50A566; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$37,120
25October 14, 2025July 31, 202575d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$37,792
26October 17, 2025October 16, 20251d511/50/50A554; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$130,319
27October 20, 2025August 29, 202552d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$23,735
28November 17, 2025October 1, 202547d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$97,274
29November 17, 2025August 29, 202580d511/50/50A554; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$89,838
30December 8, 2025November 12, 202526dINV#145660-S022-7, TOS S-022 SPZD SVS FOR WATERSHED MONIT,TMDL & REG COMPL,SCI STUDIES, 6/2-8/31/25$120,603
31December 19, 2025December 3, 202516dINV# 145660-S022-8-REVISED, TOS S-022 SPZD SVS FOR WATERSHED MONIT, 4/10/2025-9/30/2025$142,256
32January 5, 2026October 31, 202566d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$74,800
33February 6, 2026January 9, 202628dINV# 145660-S022-9, TOS S-022 SPZD SVS FOR WATERSHED MONIT,TMDL & REG, 9/2/2025-10/31/2025$153,497
34February 18, 2026December 1, 202579d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$93,918
35February 18, 2026December 29, 202551d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$92,942
36February 19, 2026January 21, 202629dINV# 145660-S022-10, TOS S-022 SPZD SVS FOR WATERSHED MONIT,TMDL & REG, 10/10/2025-11/30/2025$64,540
37March 12, 2026February 19, 202621dINV# 145660-S022-11, TOS S-022 SPZD SVS FOR WATERSHED MONIT,TMDL & REG, 10/10/2025-12/31/2025$34,520
38April 1, 2026March 2, 202630d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$118,001
39April 1, 2026March 2, 202630d511/50/50A565; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$62,992
40April 8, 2026January 30, 202668d511/50/50A554; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$70,654
41April 15, 2026March 25, 202621dINV# 145660-S022-12, TOS S-022 SPZD SVS FOR WATERSHED MONIT,TMDL & REG, 09/23/2025-01/31/2026$73,549
42May 12, 2026April 1, 202641d511/50/50A565; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$87,008
43May 12, 2026April 1, 202641d60W/50/50AX82; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$48,701
44June 12, 2026April 29, 202644d60W/50/50AX82; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$54,116
45August 18, 2026May 29, 202681d60W/50/50AX82; TOS-S036 -SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$91,544
46August 25, 2026August 5, 202620d511/50/50A566; TOS-S022 - SPECIAL SERVICE FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$36,822
47August 27, 2026May 29, 202690d511/50/50C565; TOS-S022/FY25-26 SPECIAL SVC FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$153,294
48August 31, 2026July 31, 202631d60W/50/50CX82; TOS-S036; SPECIALIZED REGULATORY AND TECHNICAL SERVICES FOR MS4 PERMIT AND WMPS$103,688
49September 1, 2026July 31, 202632d511/50/50C554; TOS-S022/FY25-26 SPECIAL SVC FOR WATERSHED MONITORING, TMDL & REGULATORY COMPLIANCE$102,055

Download this table: ·

Draw-down shape

Sources

LA Controller, Checkbook LA (pggv-e4fn), read live and grouped by po_num, which is populated on about 90% of payments. Council files link to the City Clerk's Council File Management System. Award from RAMP Opportunity Awards (h8mw-iegk), matched on the contract number embedded in this order's number and on the vendor's name. The City's biggest contracts · The checkbook.