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HomeMy WebLinkAboutTask Order No. CH1 with Teracon Consultants, Inc. for Limited Site InvestigationPURCHASING AGENT 33 East Idaho Avenue Meridian, ID 83642 Phone: (208) 888-0433 x207 Fax: (208) 887-4$13 TASK ORDER NO. CH 1 between CITY OF MERIDIAN (CITI~ AND TERACON CONSULTANTS, INC.(ENGINEER) This Task Order is issued by City and accepted by the Engineer pursuant to the mutual promises, covenants and conditions contained in the Master Agreement between the above mentioned parties dated January 4, 2007. LIMITED SITE INVESTIGATION SCOPE OF SERVICES The objective of this Task Order is to evaluate the presence of petroleum compounds (above regulatory enforcement standards) in the on-site soils and groundwater as a result of past releases of petroleum compounds at the site. Following receipt of your executed Agreement for Services and no later than 72 hours prior to intrusive activities, Terracon will contact the Idaho DIGLINE notification center to arrange fQr underground utility location at the above referenced site. DIGLINE requires the proposed boring locations to be pre-marked prior to contacting DIGLINE. In addition, a private utility locator will be contracted to locate private utilities that may be on-site and to perForm a geophysical survey in an effort to loca#e the former groundwater monitoring wells and to confirm the absence of the USTs. If the former groundwater monitoring wells can be located and are determined to be intact and viable sampling locations, Terracon may elect to redevelop and sample the existing well. This decision will be made on a well by well basis. Terracon will develop a generic safety plan to be used by our personnel during field services. At this time, we anticipate that Level D personal protective equipment (PPE) consisting of hard hats, safety glasses, protective gloves, and steel-toed boots will be required by all personnel in the work area. It may become necessary to upgrade this level of protection, at additional cost, while sampling activities are 6eing conducted in the event that petroleum or chemical constituents are encountered in soils or groundwater, which present an increased risk for personal exposure. Soil Borings and Sampling Terracon proposes to advance 10 borings at locations around the site to collect soil samples. We anticipate extending these borings to approximately 25 feet below ground surFace (bgs) based on the prior investigations conducted at the site. The finished depth of the borings will be dependant on the actual depth at which groundwater is encountered. To facilitate the installation of groundwater monitoring wells the borings ~ will be extended approximately 10 feet below the groundwater level. A truck mounted drill rig operated by an Idaho-licensed driller will be used to advanc;e the borings. Hollow stem augers will be used to advance the borings in overburden soils. Soil boring activities will be supervised by a Terracon geologist. One boring is planned at the ~ location of a former used oil UST near the southwest comer of the former building, two borings are planned at the locations of the former in-ground hydraulic lifts, one boring is planned near the former east dispenser island, one boring is planned near the former north dispenser island, and five borings are planned north of the former building in the vicinity of former on-site monitoring wells. Drilling equipment will be cleaned using a high-pressure washer prior to beginning the project and before beginning each boring. Non-dedicated sampling equipment will be cl+eaned using an Alconox~ detergent wash and potable water rinse prior to commencement of the project and between collection of each sample. Soil and rock lithology, color, relative moisture content and visual evidence of petroleum hydrocarbon impacts will be documented in the field log. In addition, the samples will be field screened using a photoionization dete~tion (PID) to detect the presence of Volatile Organic Compounds (VOC's). Groundwater Monitoring Wells Eight of the ten soil borings advanced at the site will be converted to groundwater monitoring wells to evaluate on-site groundwater within the assessment area. Monitoring wells will be constructed as follows: • Installation of 10 feet of 2-inch diameter, 0.020-inch machine slotted PVC well screen with a threaded bottom cap; • Installation of 2-inch diameter, threaded, flush joint PVC riser pipe to surface; • Addition of pre-sieved 20/40 grade silica sand for annular sand pack around the well screen from the bottom of the boring to approximately 2 feet above the top of the well screen; • Placement of 2 feet of hydrated bentonite pellets above the sand pack; • Addition of bentonite pellets to the surface; and, • Installation of flush-mount well protector set in concrete at the surFace. The monitoring wells will be developed by surging and removing groundwater until fluids appear relatively free of fine-grained sediment. Development groundwater will be stored temporarily on-site in labeled 55-gallon drums pending the results of the laboratory analyses. The drum labels will identify the apparent contents of the drum and the initial accumulation date. Following development of the monitoring wells and prior to groundwater sample collection, each well will be purged with a new disposable bailer or low flow sampling equipment. Each monitoring well will be purged a minimum of three well casing volumes of groundwater or until the monitoring well formation fails to recharge, (i.e., well runs dry). Subsequent to sufficient recharge, one groundwater sample will be collected from each monitoring well utilizing a new, disposable, polypropylene bailer. Sampling Program Terracon's soil and groundwater sampling program will consist of the following: ~ Up to 16 soil samples will be collected for laboratory testing purposes to determine the presence of petroleum products. The actual number of samples may increase or decrease depending on the extent of the contaminated soil encountered. One soil sample will be collected from each soil boring from the zones exhibiting the highest PID readings. Terracon has budgeted for six additional samples beyond t~e one sample per boring to allow for sampling flexibility. If, based on these observations, no elevated PID reading is observed, the samples will be collected from the capillary fringe zone, from the interval exhibiting a change in lithology, from the bottom of the boring, or from the intervals of likely environmental impact as determined in the field by the environmental professional. • Collection of eight groundwater samples from the newly installed groundwater monitoring wells. Additionally finro groundwater samples will be collected from off-site monitoring wells located north of the site if permission to sample these wells can be obtained and if the wells are determined to be viable. The wells will be purged with a disposable bailer or low-flow sampling pump prior to collection of the ground~water sample. The purge water will be containerized in 55-gallon drums and stored on- site. ~ One trip blank will be provided by the analytical laboratory and will travel in the cooler with the sample bottles. The trip blank will be analyzed for VOCs. The purpose of the trip blank is to evaluate potential cross- contamination that may occur during sample storage and transit. Laboratory Analytical Program The soil and groundwater samples will be collected and placed in laboratory prepared containers, labeled, and placed on ice in a cooler. The samples, completed chain-of- custody forms, and laboratory trip blank will be transported via FedEx to Environmental Science Corporation (Mt. Juliet, TN) for analysis. Rock samples will not be submitted for laboratory analysis. The soil and groundwater samples collected from seven of the soil borings/monitoring wells and groundwater samples from the two off-site groundwater monitoring wells (located in an apparent down-gradient ~sition to the northwest), will be analyzed for benzene, toluene, ethylbenzene, xylene (BTEX), naphthalene, methyl-t-butyl ether (MTBE), ethylene dibromide (E~B) and 1,2, dichloroethane (EDC). The samples from the three soil borings/monitoring wells planned for the former used oil UST and in-ground hydraulic lift area will be analyzed for VOCs, semi-volatile organic compounds (SVOCs) and RCRA (8) metals. Ana sis Sam~l Ty~e No. of Samoles Laboratorv Method BTEX, N, MTBE, EDB, EDC ~il ~ 1 EPA Method 8260 VOCs Soil 5 EPA Method 8260 SVOCs Soil 5 EPA Method 8270 RCRA (8) Metals Soil 5 EPA Method 6010/7470 BTEX, N, MTBE, EDB, EDC W~e~ g EPA Method 8260 VOCs Water 2 EPA Method 8260 SVOCs Water 2 EPA Method 8270 RCRA (8) Metals Water 2 EPA Method 6010r/470 Preqaration of LSI Reoort Upon completion of site activities and receipt of the laboratory analytical results, our findings will be presented in a LSI report that will include the following: ~ Documentation of fieid activities; • Site plan showing pertinent site features; • Soil boring logs; • Laboratory analytical results; • Data evaluation and presentation of findings; and, • Recommendations conceming further action, if necessary. Terracon's services will be pertormed in a manner consistent with gen~rally accepted practices of the profession undertaken in similar studies in the same g~ographic area during the same period. Terracon makes no warranties, expressed or implied, regarding its services, findings, conclusions or recommendations. Please note that Terracon does not warrant the work of laboratories, regulatory agencies or other third parties supplying information used in the preparation of the report. These LSI services will'~ be perFormed in accordance with the scope of work agreed with you, our client, as set forth in this proposal and are not intended to be in strict conformance with ASTM E1903-97. Findings, conclusions and recommendations resulting from these services will be based upon information derived from on-site activities and other services performed under this scope of work; such information is subject to change over time. Certain indicators of the presence of hazardous substances, petroleum produ~ts, or other constitu~nts may have been latent, inaccessible, unobservable, nondetectable or not present~ during these services, and we cannot represent that the site contains no hazardous substances, toxic substances, petroleum products, or other latent conditions beyond thQSe identified during this LSI. Subsurface conditions may vary from those encounter~d at specific borings or welfs or during other surveys, tests, assessments, inv~stigations or exploratory services; the data, interpretations, findings and our recommendations are based solely upon data obtained at the time and within the scope of these services. Investigation derived waste (soil cuttings, purge water, and decontamination water) will be containerized in 55 gallon drums and stored on-site. Disposal of this material will depend on the characterization of the soil and water and is not included ir~ this scope of work. These disposal services can be provided for an additional fee. ~ ' : Reliance The report will be prepared for the exclusive use and reliance of The City of Meridian. Reliance by any other party (other than a govemmental agency having jurisdiction of the site) is prohib~ed without the written authorization of The City of Meridian and Terracon. If The City of Meridian is aware of additional parties that will require reliance on the report, the names, addresses and relationship of these parties should be provided for Terracon approval prior to the time of authorization to proceed. Terracon will grant;reliance on the report to those approved parties upon receipt of a fully executed Relia~ce Agreement (available upon request). If, in the future, The Ciiy of Meridian and Terra~con consent to reliance on the report 6y a third party, Terracon will grant reliance upon receipt of a fully executed Reliance Agreement and receipt of an additional fee of $250.00 per relying party. Reliance on the report by The City of Meridian and all authorized parties wi~ll be subject to the terms, conditions and limitations stated in our Agreement for Services (and sections of this proposal incorporated therein), the Reliance Agreement, and the report~ TIME OF PERFORMANCE Terracon is prepared to in~tiate project activities upon receipt of the contra~t documents. Terracon can generally begin the field exploration program within about one to two weeks after receipt of authorization to pro~ depending on drill rig availability. Our schedule is largely dependent on driller availability to complete the field work. It is anticipated that the drilling and sampling activities will require five days. The standard tumaround time for laboratory results is 10 business days. Preliminary verbal results of the LSI may be available within 48 hours of Terracon's receipt of laboratory analytical reports. Three copies of the final LSI report can be issued to The City of Meridian within about two to three weeks after receipt of final laboratory analytical data. COMPENSATION Fc~r~ Si ~mmarv Consultation / IDEQ submittals ~ 2,300 Subcontract Drilling $ 15,900 Subcontract Laboratory Testing $ 3,300 Utility LocatioNGeophysical Survey $1,950 Monitor well surveying Terracon Labor (sampling, analysis, report) ~ ~ ~2~ $12,100 Fee Total $ 36,750 Contingency ~ 15% $5,513 NOT TO-EXCEED $42,263.00 This Fee Summary is based on standard laboratory tum around time of 10 business days. A faster tum around time may be requested by the client for an ~dditional fee. Drilling and Terracon field labor costs assume five days of drilling and sarrMpling. Actual i site conditions encountered during drilling may cause the amount of drilling to increase or decrease. We will notify you if conditions are encountered that may aidversely impact our anticipated costs. Should it be necessary to expand our services beyond those outlined in this proposal, we will notify you, then send a supplemental ~roposal stating the additional services and fee. We will not proceed without your authorization. Assumptions The project cost summary is based on the scope of services outlined i~ this proposal. This proposal and fee are prepared based on the following assumptions: • Terracon assumes that The City of Meridian will provide site access sufficient to complete the scope of work. • This proposed scope of work assumes the completion of the scope of work as described herein using Level D PPE. • The City of Meridian will notify Terracon prior to mobilization of any restrictions, special site access requirements, or known potentially hazardous conditions at the site (e.g., hazardous materials or processes, specialized protective equipment requirements, unsound structural conditions, etc.) • Work c~n be performed during normal business hours (Monday through Friday, 7:00 am to 7:00 pm). • Traific control services are not required. • At the conclusion of the investigation, excess soil cuttings, purge water, and decon water will be stored on-site in DOT-approved 55-gallon drums. If analytical results indicate that the soil or decon water ~is signific~ntly impacted, off-site disposal of the soil and decon water drums may be required. However, disposal of soil cuttings, purge water, and decon water is not included in the scope of this proposal. CITY OF MERIDIAN ,. BY: AMMY EERD, MAYOR Approved by Council: ( - ~ Attest: ~ . ~-,~_~- ~~ JAYCE~ L. HOLMAN, CITY Approved as to Content TERRACON CONSULTANTS INC. ~ BY: 1``~~~~~~u n q-~,,,,,~ ~~ M~A~, ~.,, A~R.tI~U1~P.E , "~O~~i~~~ OFFfCE NUNAf3ER .~ ~~ '' ; ~~~~ _ ~ ~ ~ ; ~ ~~ ' ~P~a~epartment/Public Works Approval '~~rir~~' ~ 11;, ~`~~~~~~~~`\`` ~ ` BY: BY: ~ KEIT S, PURCHASI AGENT 7"/ L~ ~ ZS NAME: ~,~ i/Ifi Dated: