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, Project No. 034-17016 Site-Specific Health& Safety Plan Page No. 2 leak detection, overfill prevention systems, spill buckets, etc.) which were subsequently properly repaired following reporting of violations to yield passing testing results prior to issuing of subsequent permitting. Based upon an October 7,2016 SJCEHD inspection of the USTs and systems,a notice to comply was issued requiring follow-up compliance with a number of operational reporting corrections, removal of water in a secondary containment, and installation of an approved spill containment bucket. Review of a subsequent November 3,2016 SSI letter to the SJCEHD indicates that compliance was made with the aforementioned violation requirements. As a result, according to discussion with the SSI facility manager, issuance of a current SJCEHD Permit to Operate for the USTs and fueling system has been delayed and that payment for the new permit was made and a current Certification of Financial Responsibility is in place. The facility continues to operate under a February 17, 2016 Permit to Operate. The most recent passing Monitoring System Certification was issued on October 7, 2016. No response actions, cleanup requirements or documentation of significant releases for the USTs and fueling system were found to be on file within the SJCEHD records reviewed. Given the approximately 26 years of operations of the fueling system,despite responsible compliance with regulatory requirements and permitting,given the age of the equipment and the numerous violation and repair incidents, it is unknown whether or not system integrity has been seamlessly maintained over the course of operations creating the potential for leaks to have occurred. Consequently,the condition of the subject site subsurface in the area of the on-site USTs, dispensers and piping is unknown. It is recommended that a screening-level assessment be conducted, including soil sampling and analysis in proximity to the USTs, dispensers and piping, to ascertain the presence or absence ofevidence ofsignificant releases of diesel fuel and motor oils. Occidental Chemical Corporation/Oxychem On-site Groundwater Monitoring Wells According to records reviewed on the RWQCB GeoTracker database, releases to groundwater have been documented at the former Occidental Chemical Corporation(OCC)facility located approximately 1,402 feet to the west-northwest of the subject site.This facility was also formerly known as Oxychem.OCC operated an agricultural chemical production facility at the site from 1964 to 1982.The primary chemicals of concern (COCs) in soil and groundwater have been identified as: 1,2-dibromo-3- chloropropane (DBCP - a soil fumigant pesticide); ethylene dibromide (EDB - used in the formulation of pesticides and fertilizers); and 2,3,4,5-tetrahydrothiophene-1,1-dioxide (sulfolane - used as a chemical solvent to clean manufacturing equipment).In 1982,OCC implemented a Groundwater Remedial Program(Remedial Program)that included the extraction and treatment of affected groundwater and the injection of treated groundwater. The site is currently owned and operated by J.R.Simplot Company(Simplot).The extraction well(EW)and monitoring well(PW)networks consists of 28 PW cluster locations and five single well PW locations,containing a total of 97 monitoring wells. Based upon review of the February 1,2017 Arcadis 2016 Annual Groundwater Monitoring Report,Former Occidental Chemical Corporation—Lathrop Facility report,monitoring well cluster PW-34,installed to 165, 205 and 255 feet below ground surface(bgs),is one of 28 cluster wells associated with the OCC groundwater investigation. Access ports for the three adjacent PW-34 groundwater monitoring wells were observed in the southeastern portion of the subject site at the time of Krazan's site reconnaissance.Review of data indicates that PW-34 at all three depths was last sampled in August 2016(3rd quarter)and concentrations of the three COCl were not detected above the indicated reporting limit, according to the MRP for the investigation; therefore, PW-34 was not sampled again in 4' quarter (December 2016). Furthermore, review of the groundwater concentration contour maps for the three COCs included in the February 2017 groundwater monitoring report suggest that the CDCs have not migrated beneath the subject site. KRAZAN&ASSOCIATES,INC. With Offices Serving the Western United States 03417016 SSI Lathy p HASP FinalAm