Teacher:In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Teacher: Now, understand the problem? Solve this instance: DUBLIN — A third of the six slides at the city’s new $43 million water park, The Wave, was closed Sunday as city and state officials investigate after a boy was launched from a three-story water slide, landing on the concrete exit next to the ride, at the park’s grand opening Saturday. 
  
 The slide from which the boy fell, which is called the Emerald Plunge, as well as a similar slide adjacent to it called the Dublin Screamer remained closed on Sunday as staff from the city of Dublin and California’s Division of Occupational Safety and Health Administration try to determine what caused the boy to fly off the slide and assess the safety of all the park’s slides. 
  
 Related Articles Video: Child thrown from slide on East Bay water park’s opening day 
  
 Peterson: Rider flung from slide, dampening Dublin’s The Wave debut 
  
 What you need to know if you’re going to the Wave water park in Dublin this weekend Dublin Assistant City Manager Linda Smith said on Sunday that the park closed a third slide, called the Riptide Rider, because staff was re-examining that ride’s water pressure. The park has a total of six slides. Three of them were available for public use on Sunday. 
  
 The description of the Riptide Rider slide on the park’s website reads: “Get ready to fly and swirl down seven stories of fun. These slides’ unique designs are fast and thrilling with unexpected steep drops and sharp turns. The translucent flume gives spectators a great view of riders zipping through the slide.” 
  
 The 10-year-old boy who was thrown from the Emerald Plunge slide on Saturday was “just shaken up” and had a scratched shoulder that was treated by first-aid workers, a park spokeswoman said after the incident was witnessed and recorded by a Bay Area News Group photographer covering the opening of the park. The photographer saw scratches on the boy’s back. The boy walked away from the incident and was helped by a lifeguard and city employee shortly after noon Saturday. 
  
 The Emerald Plunge is an open water slide that plunges at an 80-degree angle before flattening out at the bottom. Park officials said they had contacted slide manufacturer WhiteWater West Industries as well as Cal-OSHA to assess the slide. 
  
 Bay Area residents eagerly anticipated the opening of the The Wave, which is located by Dublin’s Emerald Glen Park. The facility also has three pools, a water playground and a 2,000-seat outdoor performing arts center. It is expected to employ nearly 200 seasonal employees and cost about $2.5 million to operate in its first year. 
  
 Staff writer Matthias Gafni and staff photographer Jose Carlos Fajardo contributed to this report. ||||| For the latest news on this report, click here. 
  
 DUBLIN — The much-anticipated debut of the $43 million water park “The Wave” took a scary turn Saturday when a boy was launched from a three-story water slide, landing on the concrete exit next to the ride. 
  
 The 10-year-old boy was “just shaken up” with a scratched shoulder that was treated by first aid, a park spokeswoman said shortly after the incident witnessed and recorded by a Bay Area News Group photographer covering the Dublin park’s grand opening. The photographer saw scratches on the boy’s back, before he walked away on his own power and was helped by a lifeguard and city employee shortly after noon Saturday. The ride had only been operating for 90 minutes. 
  
 The park closed the Emerald Plunge slide after the incident indefinitely and spokeswoman Shari Jackman said they are “reevaluating that slide.” No police or fire were called to the scene, park officials said, because the parents declined and were going to have the boy checked out on their own. 
  
 Dublin Assistant City Manager Linda Smith, who was standing next to the slide when the incident happened, immediately helped the boy. 
  
 “He got up immediately and as any boy would be, he was stunned,” Smith said. “I was worried if he was mentally OK, but physically he just had some scrapes.” 
  
 Park officials shut down the slide, as well as adjacent slide “Dublin Screamer,” and contacted manufacturer WhiteWater West Industries to have them come out and assess the slide. The slide had been tested “scores of times,” Smith said, and Cal-OSHA gave them a permit to open the slide Friday. 
  
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 “We’re not going to open it until we know what happened,” Smith said. 
  
 The Emerald Plunge is an open water slide that drops riders at an 80-degree angle before it flattens out at the bottom. On its website, the park described the slide: “A severe drop induces thrills in this open air ride. Prepare for a rush as you drop three stories at an 80 degree slope.” 
  
 Park officials said they followed the manufacturer’s guidelines for the slide, which has height requirements. They said they might increase the water pressure to slow riders down and add weight limits. 
  
 The park also said riders are asked to cross their arms and legs when riding down and the boy’s legs were apart. 
  
 The video shows the boy hydroplaning out of the slide near the bottom, where the arch of his back slides along the rim of the water slide for a number of feet before the boy is launched onto the concrete below. It does not appear the boy’s legs are spread when he pops outside the slide. 
  
 The Wave’s four other water slides, including “Shamrock Swirl,” “Golden Wave” and “Riptide Rider,” remained open Saturday. 
  
 About 700 people bought tickets for the debut by about 2 p.m., park officials said, on the sunny day with a light breezes. 
  
 The facility, located by Dublin’s Emerald Glen Park, also has three pools, a water playground and a 2,000-seat outdoor performing arts center. It is filled with about 480,000 gallons of water. 
  
 The facility is expected to employ nearly 200 seasonal employees and will cost about $2.5 million to operate in its first year. 
  
 Check back for updates. 
  
 Staff writers Jose Carlos Fajardo and Gary Peterson contributed to this report. |||||  
  
 DUBLIN (KRON)– Opening day at Dublin’s new water park, “The Wave” took a drastic turn when a 10-year-old boy was thrown from a water slide on Saturday. 
  
 The East Bay Times reported that the incident happened around noon when the boy was thrown out of the Emerald Plunge water slide and landed on the concrete. 
  
 He sustained scratches on his back and was able to walk away before being helped by a lifeguard and a city employee. 
  
 The Emerald Plunge slide was closed after the incident. 
  
 According to park officials, riders are supposed to cross their arms and legs when going down the slide and the boy’s legs were apart. 
  
 Video of the scary accident can be found here. 
  
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Student:
It was a rocky opening day at a $43 million California water park after a 10-year-old boy careened off a water slide and hit the pavement. Miraculously, the boy was "just shaken up" after he sailed from the tube Saturday at The Wave park in Dublin, a park rep tells the East Bay Times. A harrowing video, per KRON, captures the moment the boy catapulted from the Emerald Plunge. Luckily, he was near the bottom of the three-story slide when he slapped down on concrete. "He got up immediately … and was stunned," eyewitness Linda Smith, the assistant city manager, tells the Times. "I was worried if he was mentally OK, but physically he just had some scrapes." The boy's parents declined medical attention at the scene. Park officials closed the slide and two others while authorities investigate, including one called the Dublin Screamer, which boasts a "heart-pounding near vertical drop," per the park's website. Three of the slides remained open. The steepest slides are fully enclosed, but the Emerald Plunge has open sides and promises "a splash you'll never forget." Riders must be 48 inches tall and are told to cross their arms and legs. Park officials say the boy's legs were open, but the Mercury News counters that they appear closed. “We’re not going to open it until we know what happened,” Smith says of the slide. (A boy's death closed the world's tallest water slide.)