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CAD982358889 Site Reconnaissance !' Trinkle & Boys Agricultural Flying Interview and Observation Report (Continued) Service Comment's and Observations (continued) 5/14/92 chemicals are mixed in the hatcher and transferred to the holding tank before being pumped into the awaiting i airplanes. A concrete pad and a sump is located directly south of the chemical holding tank and batcher. The concrete pad and sump area serves as awash down facility where'chemicals are washed from airplanes and equipment. Standing water was observed.above the sump grating. Mr. Boys indicated that the electrical sump pump malfunctioned and cannot pump rinse water to the 6,500-gallon capacity holding tank I across the landing strip. The pump had been out of operation since April 1992._Trinkle & Boys complied with the Regional Water Quality Control Board's guidelines for installing a rinse water collection system on the facility in 1986, as required for all aerial applicators in the Central Valley. Mr-'Boys plans to demolish the _ present sump system and construct anew double-lined sump system to meet new pesticide rinse water regulations. Airplane engine maintenance is performed on a strip east of the hangar/office. Large oil spots can be seen on the ground surface. According to Mr. Boys,the California Department of Health Services inspected the ail spots and determined.no regulations were violated. Spilled oil was hosed off into the sump. Adjacent to the southern hangar is a fenced pesticide storage area. Several pesticides and fungicides are stored in this area. i Empty pesticide containers were triple washed and dumped into a trash container before'disposal to a Class H landfill. The Department of Agriculture inspects the trash container.before being hauled-off the site. Dark brown soil stains and white powder-trails leading up to the fenced entrance were noted on the ground surfacer Spills occurred in this area. Another storage area east of the the hangar/office contained empty stacked 55-gallon drums. This area was fenced. Mr:Boys indicated that these drums were tripled washed prior to storage. According to Mr:Boys, no wastes are generated on that contained lead,paints, or parts cleaners. Two underground.storage tanks are located on the property. One tank, approximately 100 feet cast of the hangar/office once contained aviation gasoline aboutfive to six years ago, but now is empty. Plans are ,underway to remove this tank under the supervision of the Air Pollution Control..District. Aviation gasoline is i presently,being delivered by a mobile trailer tank. Another underground storage'tank is located east of the southern hangar. Four above ground storage tanks can be seen on the east end of the property. Three of the tanks belong to a former gas station, now a`forklift repair shop, located southeast of the Trinkle&Boys site. _ Apparently, the underground storage tanks`of the gas station were removed.and are now stored on the property. The fourth tank,located next to the storage area east of the hangar/office, stored automobile gasoline that was pumped from the gas station's tanks before its removal. A drinking water well is located off site less than 200 feet north of the hangar/office. This well serves both Trinkle& Boys and a residential home located north of the site. Mr. Boys does not know the depth of the water well. A septic tank is possibly located along the northern side of the site. Gravel rinse basins where planes used to be rinsed were located on either side of the landing strip;.however, over the years the gravel has become more of a conglomerate consisting of soil and gravel. The business possesses an operational permit from the Department of Agriculture. Five people are regularly on the site. I _ Page 1 of 1 This report was prepared by: (Signature and Date) EPA PA/S! SR00012