Loading...
HomeMy WebLinkAbout2006 CON CDC Rore Environmental - Supplemental Agreement #1November 15, 2006 Rore Environmental Science and Engineering 1640 Collingswood Drive San Diego, California 92109-2239 Attention: Ms. Gita Murthy, Ph.D Project Director Project: Subject: l GIN.. Pollution Mitigation Services for the former Ace Metals Property located at 721) W. 23`d Street, National City, California Supplemental Agreement No.l This is Supplemental Agreement No.1 to the original agreement prepared on September 26, 2006 and approved by the Community Development Commission of the City of National City on October 17, 2006 by Resolution No. 2006-223. The agreement is between the Community Development Commission of the City of National City and Rore Environmental Science and Engineering, Rore Inc., to prepare and implement a site assessment and pollution Mitigation Plan for the CDC owned property located at 720 W. 23'd Street, National City, California, the former Ace Metals site. This supplemental agreement provides for an additiona! not -to -exceed amount of $63,722 for various components of additional work as described in the attached proposal from Rore Inc. dated November 10, 2006. As detailed in the proposal, a large portion of the cost increase is due to extra work as required by the Department of Environmental Health in their review and approval of the Pollution Mitigation Plan, while another major portion of the extra work is due to conditions encountered at the site once the project got underway. The contract is amended as follows: Original Contract: Amendment No. 1: Revised Contract Amount: $464,890 $63722 528,612 The contract time remains unchanged. i Morrison Chairman Date: 12/05/06 Gita Murthy Rore, Inc. Project Director Date: /31j f o 6 ENVIRONMENTAL SCIFNCF & ENGINEERING -Ll `dGOcpr 1640 Collingwood Drive • San Diego, California 92109-2239 • 858.483.8625 • Fax S58.483.4, I} • www.roreinc.com `lt�lJ�66N0y/3 p 2; 0/ November 10, 2006 Steve Kirkpatrick City of National City 1243 National City Blvd. National City, CA 91950 RE: Cost Modification Narrative to Provide Mitigation Services for the former Ace Metals Property Located at 720 West 2372D Street, City of National City, CA, DEH Case No. H23772-004 Dear Mr. Kirkpatrick: Per our discussion on November 6, 2006, please find a detailed narrative below to explain the cost modification (presented in Table 1, see attached) since the original cost proposal was submitted to you on September 26, 2006 for the former Ace Metals Property ("Property") located at 720 West 23rd Street, National City, California. RORE submitted the original cost proposal to you on September 26, 2006, which was approved by the City of National City Council on October 17, 2(X)6. On September 27, 2006, RORE met with the Department of Environmental health (DEH) to discuss RORE's mitigation plan to remediate the Ace property site. During that meeting, DEH required a comprehensive mitigation plan (i.e., one document that incorporated the plan submitted by the previous consultant, SCS Engineers, and the newly proposed mitigation plan by RORE). DEH also modified the RORE mitigation plan with respect to the sampling sites and analyses. RORE provided the comprehensive mitigation plan to DEH on October 4, 2006. Along with the mitigation plan, RORE also submitted a modified cost proposal to you on October 10, 2(X)6; this proposal considered modifications made by DEH. The RORE mitigation plan was unconditionally approved by DEH on October 31, 2(X)6. Recently, during initial work at the Ace project site on October 23, 2006, RORE was surprised to find additional items that require demolition, excavation, and disposal of the scale pit with concrete debris. These items were not identified previously in the mitigation plan produced by the former consultant. Therefore, this current cost modification includes the above -discussed changes and below is a detailed narrative explaining the modifications, when warranted. Task 1: No change Task 2: No change Task 3: No change Task 4: DEII approved a mitigation plan that was provided to them by a previous consultant on September 6, 2006. In that plan, the previous consultant intended to excavate one -foot depth of the entire property site. which would have cost the City of National City hundreds of thousands of dollars. Because this central portion has not been characterized. the RORE plan proposes to first characterize this central ENVIRONMENTAL SCIENCE & ENGINEERING portion and then to excavate based only upon the soils data from characterization and through risk assessment instead of the excavation and disposal of presumed contaminated soil. Because of this significant difference in approaches between the consultants, DEH wanted to be sure that the central portion was free of contamination. Therefore, on September 27, 2006, DEH requested comprehensive characterization, assessment, and sampling of the central portion of the subject property. This increased the number of samples and analysis, which in turn, increased costs. Please note that if data from the central portion indicates contamination, then those areas of the central portion need to be excavated and additional costs will apply. In contrast, DEH accepted RORE's proposal to consider samples that indicate no contamination from the central portion of the property as confirmatory samples. This procedure will save costs for National City because sampling will not be duplicated. Task 5: No change Task 6: RORE investigated the subject property only after the parked cars and its dealership owner vacated the lot on around October 12, 2006. At that time, RORE personnel noticed that about 250 feet of the perimeter fence was missing. To demolish the dysfunctional part of the fence and to install new fence adds a cost that was not included in the original proposal. However, the overall cost for this task is reduced from originally -proposed cost because of reduced concrete cutting area, demolition, and removal. Task 7: Based upon requirements imposed upon RORE by DEH (see explanation in Task 4 above), personnel time had to be reassessed. Consequently, the cost for personnel time varied. Also, the original proposal only included Storm Water Pollution Prevention Plan (SWPP) preparation and submission costs. After Ms. Barby Tipton of National City reviewed RORE's SWPP Plan, aspects of the plan needed to be implemented. The implementation costs were not included in the original proposal. Additional costs for water meter, project site dust suppression and labor are now also included. The monthly water costs will be a cost reimbursable item. Task 8: Based upon requirements and discussions with DEH (see explanation in Task 4 above), and to ensure that the project site is free of contaminants (VOCs, petroleum, lead, arsenic, cadmium), the sampling has increased compared to that proposed in the original proposal. Likewise, the personnel time and laboratory cost were reassessed to accommodate the modified protocol. Please note that since the original cost proposal submission to you, RORE contacted several accredited laboratories to obtain low costs associated with the lab analyses. If RORE had used the original lab that RORE used for the original proposal and incorporated the DEH-required increase in data collection, then the cost would he $17,735 higher than what RORE proposes in this modified proposal. This is, therefore, a cost savings for the City of National City. Task 9: Based upon another DEH requirement stated in a letter dated September 1 I, 2006 and requirements based upon discussions on September 27, 2006, additional samples and corresponding labor hours have been added to manage and to characterize the stockpile of contaminated soils on -site. Task 10: Increased costs are attributed to increased personnel time during stockpile disposal. Task 11: Since the original cost proposal submission, RORE was able to negotiate further with the subcontractor to reduce unit cost for labor and backfill for surface completion, thereby reducing the overall cost for this task. Cost Modification for the former Ace Metals Property Page 2 of 3 ENVIRONMENTA1 SCIENCE & ENGINEERING Task 12: No change Task 13: Following discussions with DEH, the two monitoring wells on -site (CDC 1, ('DC 2) need to be abandoned because of the invasive nature of the field work (for e.g., excavation) that is imminent around these monitoring wells. The costs for permitting, personnel, and two monitoring well abandonment reports (separate from the overall Site Remediation Final Report) preparation and submission to Site Assessment Mitigation (SAM) and to DEH in now included in the cost modification. Task 14: During RORE's initial work on October 23, 2006, RORE (and the City of National City) were surprised to find additional items that warranted demolition, excavation, and disposal of the oil that was present in the hydraulic bailer pit. To remove and to dispose of the oil and to pressure clean the pit incurs costs that were not in the original cost proposal. This item was neither identified nor discussed by the previous consultant in their mitigation plan or figures. Task 15: Again, during RORE's October 23, 2006 field work, RORE discovered a pit that contained concrete debris. We subsequently learned that the pit was once a trucking scale. Although the volume of the concrete debris is uncertain at this time (-100 tons), to demolish the pit and to stockpile the concrete incurs a cost that was not included in the original cost proposal. Please note that the actual cost for concrete debris disposal is not included in this cost modification because of the degree of uncertainty. Based upon these increases detailed above, the project management and subcontract management fees subsequently increase. The total cost increase is $63,722. I would be more than happy to answer any questions that the City of National City Council may have. In the meantime, if you have any questions regarding this proposal, please contact me at 858-483-8625 ext. 12 or on my cell at 619-922-4482. Thank you so much for your consideration! Sincerely, RORE, Inc. Gita Murthy, Ph.D. Project Director Cost ?lodification for the former Ace Mcials Property Page 3 of 3 TABLE 1: Modified Cost Proposal for the former Ace Metals Property ROBE, Inc. Task No. Activity Cost Cost Modification Cost Difference (A) 1 Fieldwork Preparation Site Health and Safety Plan $2,500 $0 Permit application and filing, 16 hrs @ $68/hr $1,088 Utility mark -out and locating, 4 hrs @ $53/hr $212 Subtotal $3,800 $3,800 2 Concrete Characterization Environmental Technician, 6 hrs @ $53/hr $318 Sampling equipment and field truck $200 $768 Laboratory analysis, 10 samples @ $25/sample $250 Subtotal $768 $0 3 Preparation of Storm Water Pollution Prevention Plan Plan development, lump sum $8,5 4 $8,500 Subtotal $8,5 $0 4 Site Assessment to Evaluate the Center Area of Property Sr. Environmental Technician, 40 hours @ 68/hr $408 $2,720 $13,594 Environmental Technician, 40 hours @ 53/hr $318 $2 120 Supplies, lump sum $200 $200 Field truck, 4 days @ 85/day $75 $340 Drilling $2,500 Concrete coring (15 cores) $300 $1,500 Laboratory analysis - Title 22 Metals (EPA 6010/7471 A, 45 samples @ 92/sample $1,192 $4,140 Laboratory analysis TPH (EPA 8015 Modified, 18 samples @ 73/sample) $1,192 $1,314 Laboratory analysis - PAHs (EPA 8310 Modified, 9 samples at $105/sample) $945 Laboratory analysis Report to DEH $1,500 Subtotal $3,685 $17,279 5 Human Health Risk Assessment Human Health Risk Assessment, lump sum $19,000 $19,000 $0 Subtotal $19,000 6 Concrete and Asphalt Demolition and Removal Site Superintendent, 30 hrs @ $84/hr $2,520 $2,520 -$1,220 Field truck, 3 days @85/day $225 $255 Chain -link fence demolition. installation (-250 feet) $1,300 Concrete cutting, demolition, and removal $20,050 $17,500 Subtotal $22,795 $21,575 1 1 / 10/2006 1 TABLE 1: Modified Cost Proposal for the former Ace Metals Property ROBE, Inc. Task No. Y Activit Cost Cost Modification Cost Difference (A) 7 Excavate Hotspots Based on Existing & Additional Site Assessment Data Site Superintendent, 50 hours @ 84/hr $5,040 S4,200 $16,865 Sr. Environmental Technician, 50 hours @ 68/hr $2,040 $3,400 Environmental Technician, 50 hours @53/hr $1,590 $2,650 Field truck, 5 days @85/day $600 $425 Hydraulic bailer pit removal and disposal $6,750 $6,750 Excavation $12,000 $14,460 Storm water Plan implementation $6,500 Dust suppression, water meter, labor $6,500 Subtotal $28,020 $44,885 8 Confirmation Sampling Site Superintendent, 30 hours @84/hr $3,360 $2,520 $5,240 Sr. Environmental Technician, 30 hours @ 68hr $1,360 $2,040 Environmental Technician, 30 hours @ 53/hr $1,060 $1,590 Field truck, 3 days @ 85/day $150 $255 XRF rental, 1 week @ $2,500/week $2,500 $2,500 Concrete curing (17 cores) $1,200 $1,700 Drilling $2,500 Mobile lab, 5 days @ $1,900/day $11,500 $9,500 Laboratory analysis - Title 22 Metals (EPA 6010/7471A, 176 samples @ 92/sample $11,250 516,192 Laboratory analysis - TPH (}-:PA 8015 Modified, 176 samples @ 73/sample $1 1,250 $12,848 Laboratory analysis - PAHs (EPA 8310, 25 samples @ 105/sample $4,050 $2,625 Laboratory analysis - VO s (EPA 8260, 25 samples @75/sample $2,800 $1,875 Laboratory analysis - PCBs (EPA 8082, 25 samples @58/sample $1,875 $1,450 Subtotal $52,355 $57,595 1 1 / 10/2006 2 TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc. Task No. Activity Cost Cost Modification Cost Difference (0) 9 Stockpile Management and Characterization Stockpile Management Plan, lump sum $2,500 $2,500 $6,291 Sr. Environmental Technician, 40 hours @ 68/hr $1,020 $2,720 Environmental Technician, 40 hours @ 53/hr $795 $2,120 Sampling supplies $250 $250 Field truck, 5 days @ 85/day $75 $425 Laboratory analysis - Title 22 Metals (EPA 6010/7471A, 40 samples @ 92/satnplc $2,871 $3,680 Laboratory analysis - TPH (EPA 8015 Modified, 40 samples @ 73/sample $2,871 S2,920 Laboratory analysis - PAHs (EPA 8310, 16 samples @ 105/sample $1,290 $1,680 Laboratory analysis - VOCs (EPA 8260, 16 samples @ 75/sample $990 $1,200 Laboratory analysis - PCBs (EPA R082, 16 samples @ 58/sample $600 $928 Laboratory analysis - STLC Metals (STLC Metals, 16 samples @ 115sample $1,275 $1,840 Laboratory analysis - TCLP Metals (TCLP Metals, 16 samples @ 115/sample $1,275 S1,840 Subtotal $15,812 $22,103 10 Stockpile Disposal Environmental Technician, 40 hours @ 53/hr $848 $2,120 $4,047 Field truck, 5 days @ 85/day $150 $425 Load -out of soils $5,000 $7,500 RCRA Hazardous Waste, 300 tons (al $210/ton $63,000 $63,000 CA non-RCRA Hazardous Waste, 1,550 tons (a) $68/ton $105,400 $105,400 Subtotal $174„398 $178,445 11 Backfilling and Surface Completion Site Superintendent, 16 hrs @ $84/hr $1,344 $1,344 -$6,780 Field truck, 2days n 85/day $150 $170 Engineered backfill, 1,850 tons @ 32/ton $63,000 $59,200 Surface completion, 8,000 ft^2 @ 1.50/ft^2 $15,000 $12,000 Compaction testing $4,000 $4,000 Subtotal $83,494 $76,714 12 Site Mitigation Report Preparation Property Closure Report $10,000 $10,000 $0 Subtotal $10,000 1 1 / 10/2006 TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc. Task No. Activity Cost Cost Modification Cost Difference (A) 13 Monitoring Well Abandonment Permit fees $500 $7,197 Field Geologist (20 hours x $84/hour) $1,680 PPE, PID $200 Field Truck. 2 days @ $85/day $170 Sample Analysis $300 IDW disposal and manifest $825 Reporting, Geologist (8 hours x $84/hour) $672 Drilling $2,850 Subtotal $7,197 14 Hydraulic bailer pit with Oil Oil removal and pressure clean $2,500 $2,925 Disposal (liquid -250 gal @ $ I/gal; sludge -50 gal @ $3.50/gal)) $425 Subtotal $2,925 15 Trucking Scale Pit with Concrete Debris Saw Cut, Mob/Demob $395 $9,770 Demo, stockpile $5.500 Backfill (-100 tons @ .32/ton) $3,200 Surface Replacement (-450 square feet @1.50/square foot) $675 Subtotal $9,770 Subtotal $422,627 $480,556 $57,929 Project Management and Subcontract Management Fee (10% of Professional and Contractor Fees) $42,263 $48,056 $5,793 TOTAL $464,8901 $528,612 $63,722 11 / 10/2006 4 APPENDIX A ACE METALS PROPERTY, NATIONAL CITY PROJECT ASSUMPTIONS 1. Access to Property will he provided between 7:00 am to 3:30 pm, Monday through Friday. 2. Water will be available at the Property at no cost to RORE. 3. The City of National City will waive the City permit fees as needed. 4. RORE will utilize state -licensed subcontractors and construction crews, who will be paid prevailing wages. 5. The City of National City representatives will be required to sign the manifest for disposal of hazardous waste at the designated landfill site. 6. Based on review of available data, groundwater is deeper than 20 feet; the RORE Team will not be required to dewater during soil excavation. 7. RORE will not be responsible for delay in project execution due to a delay in obtaining the applicable permits from regulators and/or unforeseen conditions such as rain and flooding. 8. Quantities of soil used in this proposal are estimates based on available information provided in the RPMP. Due to the inherent uncertainty associated with the mitigation of subsurface contamination, quantities of RCRA hazardous and non-RCRA hazardous soil may vary from the proposed amounts. If this occurs, the Client will be notified prior to proceeding with the associated task. 9. The central portion of the Property will turn out to be non-hotspot area. If it turns out contrary to this assumption, then additional costs to excavate, dispose, and re -sample for confirmation may apply. The Client will be notified prior to proceeding with this task. 10. RORE's estimated cost does not include any emergency cleanup in the event that any unknown hazardous chemicals are encountered. 11. RORE's estimated cost does not include removal and disposal of underground and/or aboveground storage tanks, if encountered. However, RORE will inform the National City Project Manager and obtain his concurrence for a change order and the additional cost involved. 12. The proposed redevelopment will be slab -on -grade construction; the final grading will only he approximate. 13. There is only about 2 feet of sludge at the bottom of the hydraulic bailer pit. 14. The oil content is non-RCRA hazardous and is transported and disposed of at Dome Rock Industries, Inc. 15. "Where is no rebar during concrete and concrete debris cutting and excavation. 16. The concrete debris excavation cost does not include actual transportation and disposal of the debris. RESOLUTION NO. 2006 — 259 RESOLUTION OF THE COMMUNITY DEVELOPMENT COMMISSION OF THE CITY OF NATIONAL CITY AUTHORIZING THE CHAIRMAN TO EXECUTE A SUPPLEMENTAL AGREEMENT WITH RORE ENVIRONMENTAL SCIENCE AND ENGINEERING, INC. IN THE NOT TO EXCEED AMOUNT OF $63,772 TO PROVIDE ADDITIONAL SERVICES ASSOCIATED WITH THE POLLUTION MITIGATION FOR THE FORMER ACE METALS PROPERTY LOCATED AT 720 WEST 23RD STREET WHEREAS, the Community Development Commission of the City of National City ("CDC") acquired the property located at 720 West 23rd Street in 2002 to allow for development in accordance with the Harbor District Specific Plan; and WHEREAS, prior to the acquisition by the CDC, the property was the site of a company called Ace Metals, who operations resulted in environmental contamination; and WHEREAS, through the adoption of Resolution No. 2006-223 on October 17, 2006, the CDC entered into a contract with Rore Environmental Science and Engineering Inc., to prepare and implement a site assessment and pollution mitigation plan for the site; and WHEREAS, the Department of Environmental Health has reviewed and approved the plan, but is requiring several additional items of work that increase the cost of implementation. In addition, since work begin on the site, conditions have been discovered on the site that have increased costs. NOW, THEREFORE, BE IT RESOLVED by the Community Development Commission of the City of National City that the Chairman is hereby authorized to execute a Supplemental Agreement with Rore Environmental Science and Engineering Inc., in the not to exceed amount of $63,722 to provide additional services associated with the pollution mitigation for the former Ace Metals property located at 720 West 23rd Street. Said Supplemental Agreement is on file in the office of the City Clerk. PASSED and ADOPTED this 5th day of December„2206. Ron Morrison, Chairman APPROVED AS TO FORM: Z air George H. Eiser, III Legal Counsel Passed and adopted by the Community Development Commission of National City, California, on December 5, 2006, by the following vote, to -wit: Ayes: Councilmembers Morrison, Natividad, Parra, Zarate. Nays: None. Absent: None. Abstain: None. AUTHENTICATED BY: RON Chairman Secretary Com RRISON nity Developmen Commission ent Commission By: Deputy I HEREBY CERTIFY that the above and foregoing is a full, true and correct copy of RESOLUTION NO. 2006-259 of the Community Development Commission of the City of National City, California, passed and adopted on December 5, 2006. Secretary Community Development Commission By: Deputy City of National City, California COMMUNITY DEVELOPMENT COMMISSION AGENDA STATEMENT 19 MEETING DATE December 5, 2006 AGENDA ITEM NO.. (11;EM TITLE Resolution of the Community Development Commission of the City of National Ci\ Approving a supplemental agreement to an existing contract with Rore Environmental Science and Engineering, Inc. in the amount of $63,722 to provide additional services associated with the pollution mitigation services for the former Ace Metals Property located at 720 West 23rd Street, and authorizing the Chairman to sign the upplemental agreement. PREPARED BY Stephen Kirkpatrick DEPARTMENT Engineering Ext. 4383 EXPLANATION See Attached. Environmental Review: N/A Financial Statement: Funding to accomplish this work is available within the CDC budget. Account No. qo o,"0 9 STAFF RECOMMENDATION: Adopt the Resolution. BOARD / COMMISSION RECOMMENDA N N/A ATTACHMENTS 1. Resolution 2. Supplemental Agreement Number One Resolution No. xCirc(c 02Sy Rare 2506 C Explanation The Community Development Commission of National City acquired the property at 720 West 23nd Street in 2002. The property was acquired to allow for development in accordance with the Harbor District Specific Plan. Prior to the acquisition by CDC, the property was the site of a company called Ace Metals. The use of property by Ace Metals resulted in environmental contamination, primarily with heavy metals, but also to a lesser extent with volatile hydrocarbons. Before the site can be developed the site must be cleaned to the satisfaction of the County of San Diego Department of Environmental Health. They have opened Case No. H23772-004 for this purpose. CDC withheld funding to clean the site from the purchase price paid for the property. The purchase agreement states that the site must be cleaned and the funding expended by December 31, 2006, or the withheld funds must be released to the seller of the property. On October 17, 2006 through Resolution 2006-223 the Community Development Commission of the City of National City entered into a contract with Rore, Inc. to prepare and implement a site assessment and pollution mitigation plan for the site. The mitigation plan was submitted as required to the DEH for review and approval. The DEH has approved the plan, but has required several additional items of work that has increased the cost of implementation. In addition, since work began on the site, some conditions have been encountered that have caused increased cost. Each of the components of the cost increase, both from the DEH and the site conditions, are detailed in the attached supplemental agreement . RESOLUTION NO. 2006 — 259 RESOLUTION OF THE COMMUNITY DEVELOPMENT COMMISSION OF THE CITY OF NATIONAL CITY AUTHORIZING THE CHAIRMAN TO EXECUTE A SUPPLEMENTAL AGREEMENT WITH RORE ENVIRONMENTAL SCIENCE AND ENGINEERING, INC. IN THE NOT TO EXCEED AMOUNT OF $63,772 TO PROVIDE ADDITIONAL SERVICES ASSOCIATED WITH THE POLLUTION MITIGATION FOR THE FORMER ACE METALS PROPERTY LOCATED AT 720 WEST 23RD STREET WHEREAS, the Community Development Commission of the City of National City ("CDC") acquired the property located at 720 West 23rd Street in 2002 to allow for development in accordance with the Harbor District Specific Plan; and WHEREAS, prior to the acquisition by the CDC, the property was the site of a company called Ace Metals, who operations resulted in environmental contamination; and WHEREAS, through the adoption of Resolution No. 2006-223 on October 17, 2006, the CDC entered into a contract with Rore Environmental Science and Engineering Inc., to prepare and implement a site assessment and pollution mitigation plan for the site; and WHEREAS, the Department of Environmental Health has reviewed and approved the plan, but is requiring several additional items of work that increase the cost of implementation. In addition, since work begin on the site, conditions have been discovered on the site that have increased costs. NOW, THEREFORE, BE IT RESOLVED by the Community Development Commission of the City of National City that the Chairman is hereby authorized to execute a Supplemental Agreement with Rore Environmental Science and Engineering Inc., in the not to exceed amount of $63,722 to provide additional services associated with the pollution mitigation for the former Ace Metals property located at 720 West 23rd Street. Said Supplemental Agreement is on file in the office of the City Clerk. PASSED and ADOPTED this 5th day of December, 2006. Ron Morrison, Chairman ATTEST: Brad Raulston, Secretary APPROVED AS TO FORM: George H. Eiser, III Legal Counsel November 15, 2006 Rore Environmental Science and Engineering 1640 Collingswood Drive San Diego, California 92109-2239 Attention: Ms. Gita Murthy, Ph.D Project Director Project: Subject: ORIGINAL Pollution Mitigation Services for the former Ace Metals Property located at 720 W. 23" Street, National City, California Supplemental Agreement No.1 This is Supplemental Agreement No.1 to the original agreement prepared on September 26, 2006 and approved by the Community Development Commission of the City of National City on October 17, 2006 by Resolution No. 2006-223. The agreement is between the Community Development Commission of the City of National City and Rore Environmental Science and Engineering, Rore Inc., to prepare and implement a site assessment and pollution Mitigation Plan for the CDC owned property located at 720 W. 231a Street, National City, California, the former Ace Metals site. This supplemental agreement provides for an additional not -to -exceed amount of $63,722 for various components of additional work as described in the attached proposal from Rore Inc. dated November 10, 2006. As detailed in the proposal, a large portion of the cost increase is due to extra work as required by the Department of Environmental Health in their review and approval of the Pollution Mitigation Plan, while another major portion of the extra work is due to conditions encountered at the site once the project got underway. The contract is amended as follows: Original Contract: $464,890 Amendment No. 1: $63722 Revised Contract Amount: 528,612 The contract time remains unchanged. Ron Morrison, Chairman Date: Gita Murthy Rore, Inc. Project Director Date: ///11/4) 1640 Collingwood Drive November 10, 2006 ENVIRONMENTAL SCIENCE & ENGINEERING • San Diego, California 92109-2239 • 858.483.8625 • Fax 858.483,41A3 • www.roreinc.com NCy,3 2 0/ Steve Kirkpatrick City of National City 1243 National City Blvd. National City, CA 91950 RE: Cost Modification Narrative to Provide Mitigation Services for the former Ace Metals Property Located at 720 West 23RD Street, City of National City, CA, DEH Case No. H23772-004 Dear Mr. Kirkpatrick: Per our discussion on November 6, 2006, please find a detailed narrative below to explain the cost modification (presented in Table 1, see attached) since the original cost proposal was submitted to you on September 26, 2006 for the former Ace Metals Property ("Property") located at 720 West 23"r Street, National City, California. RORE submitted the original cost proposal to you on September 26, 2006, which was approved by the City of National City Council on October 17, 2(X)6. On September 27, 2006, RORE met with the Department of Environmental Health (DEII) to discuss RORE's mitigation plan to remediate the Ace property site. During that meeting, DEH required a comprehensive mitigation plan (i.e., one document that incorporated the plan submitted by the previous consultant, SCS Engineers, and the newly proposed mitigation plan by RORE). DEH also modified the RORE mitigation plan with respect to the sampling sites and analyses. RORE provided the comprehensive mitigation plan to DEII on October 4, 2006. Along with the mitigation plan, RORE also submitted a modified cost proposal to you on October 10, 2006; this proposal considered modifications made by DEH. The RORE mitigation plan was unconditionally approved by DE11 on October 31, 2006. Recently, during initial work at the Ace project site on October 23, 2006, RORE was surprised to find additional items that require demolition, excavation, and disposal of the scale pit with concrete debris. These items were not identified previously in the mitigation plan produced by the former consultant. Therefore, this current cost modification includes the above -discussed changes and below is a detailed narrative explaining the modifications, when warranted. Task 1: No change Task 2: No change Task 3: No change Task 4: I)F.II approved a mitigation plan that was provided to them by a previous consultant on September 6. 2006. In that plan. the prcvinus consultant intended to excavate one -foot depth of the entire property site. which would have cost the City of National City hundreds of thousands of dollars. Because this central portion has not been characterized. the It ORE plan proposes to first characterize this central ENVIRONMENTAL SCIENCE & ENOINEERiNO portion and then to excavate based only upon the soils data from characterization and through risk assessment instead of the excavation and disposal of presumed contaminated soil. Because of this significant difference in approaches between the consultants, DEH wanted to be sure that the central portion was free of contamination. Therefore, on September 27, 2006, DEH requested comprehensive characterization, assessment, and sampling of the central portion of the subject property. This increased the number of samples and analysis, which in turn, increased costs. Please note that if data from the central portion indicates contamination, then those areas of the central portion need to be excavated and additional costs will apply. In contrast, DEH accepted RORE's proposal to consider samples that indicate no contamination from the central portion of the property as confirmatory samples. This procedure will save costs for National City because sampling will not be duplicated. Task 5: No change Task 6: RORE investigated the subject property only after the parked cars and its dealership owner vacated the lot on around October 12, 2006. At that time, RORE personnel noticed that about 250 feet of the perimeter fence was missing. To demolish the dysfunctional part of the fence and to install new fence adds a cost that was not included in the original proposal. However, the overall cost for this task is reduced from originally -proposed cost because of reduced concrete cutting area, demolition, and removal. Task 7: Based upon requirements imposed upon RORE by DEH (see explanation in Task 4 above), personnel time had to be reassessed. Consequently, the cost for personnel time varied. Also, the original proposal only included Storm Water Pollution Prevention Plan (SWPP) preparation and submission costs. After Ms. Barby'I'ipton of National City reviewed RORE's SWPP Plan, aspects of the plan needed to be implemented. The implementation costs were not included in the original proposal. Additional costs for water meter, project site dust suppression and labor are now also included. The monthly water costs will be a cost reimbursable item. Task 8: Based upon requirements and discussions with DEH (see explanation in Task 4 above), and to ensure that the project site is free of contaminants (VOCs, petroleum, lead, arsenic, cadmium), the sampling has increased compared to that proposed in the original proposal. Likewise, the personnel time and laboratory cost were reassessed to accommodate the modified protocol. Please note that since the original cost proposal submission to you, RORE contacted several accredited laboratories to obtain low costs associated with the lab analyses. If RORE had used the original lab that RORF. used for the original proposal and incorporated the DEFI-required increase in data collection, then the cost would he $17,735 higher than what RORE proposes in this modified proposal. This is. therefore, a cost savings for the City of National City. Task 9: Based upon another DEH requirement stated in a letter dated September 1 I. 2006 and requirements based upon discussions on September 27, 2006, additional samples and corresponding labor hours have been added to manage and to characterize the stockpile of contaminated soils on -site. Task 10: Increased costs are attributed to increased personnel .irne during stockpile disposal. Task 11: Since the original cost proposal submission, ROREv.as able to negotiate further with the subcontractor tr> reduce unit cost for labor and backfill for surface completion, thereby reducing the overall cost for this task. (. ' I i loditicaU..n f,;r llic t brier :Ace N1ct,rl, riop tv Pape ENVIRONMENTAL SCIENCE & ENGINEMO Task 12: No change Task 13: Following discussions with DEH, the two monitoring wells on -site (CDC 1, CDC 2) need to be abandoned because of the invasive nature of the field work (for e.g., excavation) that is imminent around these monitoring wells. The costs for permitting, personnel, and two monitoring well abandonment reports (separate from the overall Site Remediation Final Report) preparation and submission to Site Assessment Mitigation (SAM) and to DEH in now included in the cost modification. Task 14: During RORE's initial work on October 23, 2006, RORE (and the City of National City) were surprised to find additional items that warranted demolition, excavation, and disposal of the oil that was present in the hydraulic bailer pit. To remove and to dispose of the oil and to pressure clean the pit incurs costs that were not in the original cost proposal. This item was neither identified nor discussed by the previous consultant in their mitigation plan or figures. Task 15: Again, during RORE' s October 23, 2006 field work, RORE discovered a pit that contained concrete debris. We subsequently learned that the pit was once a trucking scale. Although the volume of the concrete debris is uncertain at this time (-100 tons), to demolish the pit and to stockpile the concrete incurs a cost that was not included in the original cost proposal. Please note that the actual cost for concrete debris disposal is not included in this cost modification because of the degree of uncertainty. Based upon these increases detailed above, the project management and subcontract management fees subsequently increase. The total cost increase is $63,722. I would be more than happy to answer any questions that the City of National City Council may have. In the meantime, if you have any questions regarding this proposal, please contact me at 858-483-8625 ext. 12 or on my cell at 619-922-4482. Thank you so much for your consideration! Sincerely, RORE, Inc. CTita Murthy, Ph.D. Project Director Coat.v.loclili::annn for ihr torrr.er .Acc TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc Task No. Activity Cost Cost Modification Cost Difference (A) 1 Fieldwork Preparation Site Health and Safety Plan $2,500 Permit application and filing, 16 hrs @ $68/hr $1,088 Utility mark -out and locating, 4 his @ $53/hr $212 Subtotal $3,800 $3,800 $0 2 Concrete Characterization Environmental Technician, 6 hrs @ $53/hr $318 Sampling equipment and field truck $200 Laboratory analysis, 10 samples @ $25/sample $250 Subtotal $768 $768 $(1 3 Preparation of Storm Water Pollution Prevention Plan Plan development, lump sum $g ,54 Subtotal $8,5 $8,500 $0 4 Site Assessment to Evaluate the Center Area of Property Sr. Environmental Technician, 40 hours @ 68/hr $408 $2,720 Environmental Technician, 40 hours @ 53/hr $318 $2,120 Supplies, lump sum $200 $200 Field truck, 4 days @ 85/day $75 $340 Drilling $2,500 Concrete coring (15 cures) $300 $1,500 Laboratory analysis - Title 22 Metals (EPA 6010/7471A, 45 samples @ 92/sample $1,192 $4,140 Laboratory analysis - TPI1 (EPA 8015 Modified, 18 samples @ 73/sample) $1,19. $1,314 Laboratoi y analysis - PAHs (EPA 8310 Modified, 9 samples at $I05/sample) 5945 Laboratory analysis Report to DEH $1,500 Subtotal $3,685 $17,279 $13,594 5 Human Health Risk Assessment Human I lealth Risk Assessment, lump sum $19,000 Subtotal $19,000 $19,000 $0 6 Concrete and Asphalt Demolition and Removal Site Superintendent, 30 hrs @ $84/hr $2,520 $2,520 Field truck, 3 days @85/day $225 $255 Chain -link G,nce demolition. installation 1-250 feet) $1,300 Concrete cutun;'. demolition, and removal S20,050 S 17,500 Subtotal $22,795 $21,575 -$1,220 11 0-2006 TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc, Task No. Activity Cost Cost Modification Cost Difference (A) 7 Excavate Hotspots Based on Existing & Additional Site Assessment Data Site Superintendent, 50 hours @ 84/hr $5,040 $4,200 $16,865 Sr. Environmental Technician, 50 hours @ 68/hr $2,040 $3,400 Environmental Technician, 50 hours @53/hr $1,590 $2,650 Field truck, 5 days @85/day $600 $425 Hydraulic bailer pit removal and disposal $6,750 $6,750 Excavation $12,000 $14,460 Storm water Plan Implementation $6,500 Dust suppression, water meter, labor $6,500 Subtotal $28,020 $44,885 8 Confirmation Sampling Site Superintendent, 30 hours @84/hr $3,360 $2,520 $5,240 Sr. Environmental Technician, 30 hours @ 68hr $1,360 $2,040 Environmental Technician, 30 hours @ 53/hr $1,060 $1,590 Field truck, 3 days @ 85/day $150 $255 XRF rental, 1 week @ $2,500/week $2,500 $2,500 Concrete coring (17 cores) $1,200 $1,700 Drilling $2,500 Mobile lab, 5 days @ $1,900/day $11,500 $9,500 I.ahoratory analysis -Title 22 Metals (EPA 6010/7471A, 176 samples (a 92/sample $11,250 $I6,I92 Laboratory analysis - TP11 (EPA 8015 Modified, 176 samples («t 7:3/sample. $11,250 $12,848 Laboratory analysis - PAHs (EPA 8310, 25 sarnplcs (a) 105/sample $4,050 $2,625 Laboratory analysis VOCs (EPA 8260, 25 samples (a'75/sample $2,800 $1,875 Laboratory analysis - PC'13s (EPA 8082, 25 samples @58/sample $1,875 $1,450 Subtotal $52,355 $57,595 1 t: ' 0:2006 4 TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc, Task No. Y Activit Cost Cost Modification Cost Difference (A) 9 Stockpile Management and Characterization Stockpile Management Plan, lump sum $2,500 $2,500 Sr. Environmental Technician, 40 hours @ 68/hr $1,020 $2,720 Environmental Technician, 40 hours @ 53/ltr $795 $2,120 Sampling supplies $250 $250 Field truck, 5 days @ 85/day $75 $425 Laboratory analysis - Title 22 Metals (EPA 6010/7471A, 40 samples @ 92/sample $2,871 $3,680 Laboratory analysis - TPH (EPA 8015 Modified, 40 samples @ 73/sample $2,871 $2,920 Laboratory analysis - PAHs (EPA 8310, 16 samples @ 105/sample $1,290 $1,680 Laboratory analysis - VOCs (EPA 8260, 16 samples @ 75/sample $990 $1,200 Laboratory analysis - PCBs (EPA 8082, 16 samples @ 58/sample $600 $928 Laboratory analysis - STLC Metals (STLC Metals, 16 samples @ 115sample $1,275 $1,840 Laboratory analysis - TCLP Metals (TCLP Metals, 16 samples @115/sample $1,275 $1,840 Subtotal $15,812 $22,103 $6,291 10 Stockpile Disposal Environmental Technician, 40 hours @ 53/hr $848 $2,120 Field truck, 5 days @ 85/day $150 $425 Load -out of soils 55,000 $7,500 RCRA Hazardous Waste, 300 tons @ $210/ton $63,000 $63,000 CA non-RCRA 11a7ardnus Waste, 1,550 tons @ 568/ton $105,400 5105,400 Subtotal $174,398 $178,445 $4,047 11 I Backfilling and Surface Completion Site Superintendent, 16 hrs @ $84/hr $1,344 $1,344 Field truck, 2days 485/day $150 $170 Engineered backfill. 1,850 tons ltS 32/ton $63,000 $59,200 Surface completion, 8,000 ft^2 @ 1.50/ft^2 $15,000 $12,CN10 Compaction testing $4.000 $4,000 Subtotal $83,494 $76,714 -$6,780 12 Site Mitigation Report Preparation Property Closure Report S 10,000 Subtotal $10,000 $10,000 $0 1 1i1G'2J06 TABLE 1: Modified Cost Proposal for the former Ace Metals Property RORE, Inc, Task No. Activity Cost Cost Modification Cost Difference (A) 13 Monitoring Well Abandorunent Permit fees $500 Field Geologist (20 hours x $84/hour) $1,680 PPE, PID $200 Field Truck, 2 days @ $85/day $170 Sample Analysis $300 IDW disposal and manifest $825 $7,197 Reporting, Geologist (8 hours x $84/hour) $672 Drilling $2,850 Subtotal $7,197 14 Hydraulic bailer pit with Oil Oil removal and pressure clean $2,500 $2,925 Disposal (liquid -250 gal @ $1/gal; sludge -50 gal @ $3.50/Ral)) $425 Subtotal $2,925 15 Trucking Scale Pit with Concrete Debris Saw Cut, Mob/Demob $395 $9,770 Derar, stockpile $5.500 Backfill (-100 tons (0) :32/ton) $3,200 Surface Replacement (-450 square feet @ 1.50/square fout) $675 Subtotal $9,770 Subtotal $422,627 $480,556 $57,929 • Project Management and Subcontract Management Fee (10% of Professional and Contractor Fees) $42,263 $48,056 $5,793 TOTAL. $464,890 $528,612 $63,722 8 APPENDIX A ACE METALS PROPERTY, NATIONAL CITY PROJECT ASSUMPTIONS 1. Access to Property will be provided between 7:00 am to 3:30 pm, Monday through Friday. 2. Water will be available at the Property at no cost to RORE. 3. The City of National City will waive the City permit fees as needed. 4. RORE will utilize state -licensed subcontractors and construction crews, who will be paid prevailing wages. 5. The City of National City representatives will be required to sign the manifest for disposal of hazardous waste at the designated landfill site. 6. Based on review of available data, groundwater is deeper than 20 feet; the RORE Team will not be required to dewater during soil excavation. 7. RORE will not be responsible for delay in project execution due to a delay in obtaining the applicable permits from regulators and/or unforeseen conditions such as rain and flooding. 8. Quantities of soil used in this proposal are estimates based on available information provided in the RPMP. Due to the inherent uncertainty associated with the mitigation of subsurface contamination, quantities of RCRA hazardous and non-RCRA hazardous soil may vary from the proposed amounts. If this occurs, the Client will be notified prior to proceeding with the associated task. 9. The central portion of the Property will turn out to he non-hotspot area. If it turns out contrary to this assumption, then additional costs to excavate, dispose, and re -sample for confirmation may apply. The Client will be notified prior to proceeding with this task. 10. RORE's estimated cost does not include any emergency cleanup in the event that any unknown hazardous chemicals are encountered. 11. RORE's estimated cost does not include removal and disposal of underground and/or aboveground storage tanks, if encountered. However, RORE will inform the National City Project Manager and obtain his concurrence for a change order and the additional cost involved. 12. The proposed redevelopment will be slab -on -grade construction; the final grading will only be approximate. 13. There is only about 2 feet of sludge at the bottom :>f the hydraulic bailer pit. 14. The oil content is non-RCRA hazardous and is transported and disposed of at Dome Rock Industries. Inc. 15. There is no tebar during concrete and concrete debris cutting and excavation, 16. The concrete debris excavation ccr;t does not include actual transportation and disposal of the debris. City of National City Office of the City Clerk 1243 National City Boulevard, National City, CA 91950-4397 Michael R. Della, CMC - City Clerk (619) 336-4228 Fax: (619) 336-4229 December 21, 2006 Gita Murthy, Project Director Rore Environmental Science & Engineering 1640 Collingswood Drive San Diego, CA 92109-2239 Project: National City — Pollution Mitigation Services — Former Ace Metals Dear Mr. Murthy: On December 5th, 2006, the Community Development Commission of the City of National City passed and adopted Resolution No. 2006-259 approving an agreement for Pollution Mitigation Services. We are pleased to enclose one fully executed original agreement and one certified copy of the Resolution for your records. Should you have any questions, please contact Mr. Steve Kirkpatrick, Director, Engineering at 336-4380. Michael R. Dalla City Clerk JAH Enclosure File C2006-58 cc: Engineering ® Recycled Paper