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contaminated water and any material that is used to contain and/or recover the contaminated groundwater shall be removed by a licensed contractor and disposed of to a proper facility under waste manifest. Rollover Berm The rollover berm will contain rainfall that enters the berm. Rainfall collects in the northwest corner of the berm. The content of the rollover berm is inspected by facility personnel prior to being removed to ensure that only oil-free water is allowed to enter the facility storm water drainage system. Drainage events are recorded in the log included in Attachment B to this SPCC Plan and must be kept with the Plan for at least 3 years. Surficial Runoff i Surficial runoff at the site flows into one of several drain inlets located around the site (Figure 4). Two oil-water separators (OWSs) were observed at the site. It is believed that the onsite storm drains flow into the OWSs prior to entering the City of Lathrop's storm drain system, althougjo no drainage plans were available for review. The closest offsite storm drain inlet to the facility is Kcated along Harlan Road just north of the northern driveway at approximately the property line. According to the City of Lathrop, the City's storm drain system in the area flows to the north undQ0 Harlan Road to a pump station at the intersection of Harlan Road and J Street. From there, the water flows south along Harlan to a a detention basin near the intersection of Harlan Road and Eas ousie Avenue. In the event of heavy rains, the detention basin may be ped and discharink d the San Joaquin River. In the event of a major spill, uncontained product would enter the storm drain inlet as described above. Until adequate containment is constructed at the site, Joe's Travel Plaza personnel should be prepared to prevent product from entering the storm drain systems In the event of any spill or leak from a tank,tote, or drum, absorbent materials or a rubber mat should be used to prevent product from entering any nearby drain inlets. AV / Any material that has been contained and recovered shall be removed by a licensed contractor and disposed of to a proper facility under waste manifest. BULK STORAGE TANK CONSTRUCTION (40 CFR 112.8(c)(1)) i All active tanks used to store oil products at this facility are constructed of material compatible with the product they store and conditions of storage such as pressure and temperature. The containers used to store oil products at this facility are constructed of steel in accordance with the appropriate construction standard and are compatible with the oils they store at normal operating temperature and pressure conditions anticipated at the site. Above ground piping for the AST is made of steel and designed to minimize damage from erosion and stress. Piping detail is shown on Figure 3. DRAINAGE OF CONTAINMENT AREAS (40 CFR 112.8(c)(3) Drainage from the concrete berm surrounding tanks AST-1 through AST-4 is two holes located in the northeast corner of the containment berm wall. Drainage from the holes flows into a storm drain inlet Joe's Travel Plaza 15600 Harlan Road,Lathrop,CA Page 17