Laserfiche WebLink
EBI Consulting <br />A environmental I engineering I due diligence <br />21 B Street <br />Burlington, MA 01803 <br />Tel: (781) 273-2500 <br />Fax: (781) 273-3311 <br />www.ebiconsulting.com <br />November 27, 2017 <br />San Joaquin County <br />Environmental Health Department <br />1868 E. HazeIton Ave. <br />Stockton, CA 95205 <br />RE: Proposed Scope of Work for Phase II Environmental Site Assessment <br />Country Club Blvd. / 295950 <br />1876 Country Club Boulevard, Stockton, California <br />BACIEC:ROU.Np <br />RECEIVED <br />DEC 0 5 2017 <br />IIRONMENTAL nEALTD <br />D E PA 1tT M ENT <br />The Subject Property, known as Country Club Blvd. / 295950, consists of an approximately 0.47-acre lot that is <br />improved with two commercial buildings and a telecommunication tower facility. The two commercial buildings <br />are located on the northern portion of the parcel and were constructed in approximately 1955. The <br />telecommunication tower facility, located on the southwestern portion of the parcel, was constructed in <br />approximately 2003. The following items of environmental concern were noted in the Phase I ESA: <br />According to the EDR database report, the Subject Property is listed as an Underground Storage Tank (UST) <br />facility and Leaking Underground Storage Tank (LUST) facility associated with two 1,000-gallon gasoline <br />USTs. A No Further Action Concurrence letter from the California Regional Water Quality Control Board <br />dated January 24, 2012 indicated that both USTs were excavated from the Subject Property in January 1989. <br />The site was over-excavated to 30 feet below grade in 2003 as part of the remediation efforts with up to <br />750 cubic yards of impacted soil removed. Additionally, a total of 116,535 gallons of impacted groundwater <br />was treated on site and discharged to the sewer via a pump-and-treat system. The over excavation removed <br />approximately 6,791 lbs of total petroleum hydrocarbons-gasoline (TPHg) in soil and 2.41 gallons of TPHg in <br />groundwater. Residual soil and groundwater contamination remains onsite; approximately 685 lbs of residual <br />soil mass TPHg and approximately 0.06 lbs of TPHg remain in groundwater. Soil vapor concentrations did <br />not exceed Region 2 Environmental Screening Levels (ESLs) for commercial use. However, soil results failed <br />ESLs for gross contamination and direct contact TPHg and direct contact (benzene) at 16 inches below grade. <br />The soil and groundwater contamination are reportedly limited in overall extent. The commercial use of <br />the Subject Property is not anticipated to change. TPH in groundwater is expected to reach water quality <br />goals by 2039 via natural attenuation. <br />A UST Closure Letter dated September 10, 2013, from the San Joaquin County Environmental Health <br />Department confirms completion of the site investigation. The UST removal, remediation efforts and <br />subsequent closure is considered a HREC for the Subject Property. However, the residual TPHg and <br />benzene impact in soil and groundwater is considered to represent a REC for the Project Site. <br />PROPOSED SCOPE OF WORK <br />EBI and/or a drilling subcontractor will contact the appropriate state agencies and local and municipal utilities <br />in order to obtain utility clearance prior to commencing the subsurface investigation. Unless otherwise <br />agreed, the Client shall provide or arrange for EBI to be provided with locations of buried utilities and other <br />underground structures in areas of subsurface exploration. The on-site representatives will also confirm the <br />location of underground utilities to EBI. In addition, EBI will retain a private utility locator contractor to <br />screen for underground utilities.