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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAABAklEQVQ4je3SPyiFYRTH8Y/uWxISugNlMEgxKxIlGWwkJqHuYpDNIoxGIoXNIFml7mB1JQZ/BibXxCJle0suyUDKe3VfyeQ7nt853855egK/TPAv/JM3rNegyYPQvSOEPxOWSRqzYEK3RjVynu06sWbTnuW4wiJzVk0Z+NSZ0K9FpyYjEtIWCxcOS5nUF5lVKzUuJW096vwgcqhdl2KJPNvTq1mHHvt2ChOWqMgre5+qVZUv+sqdW99x5cmN48KFWUsODWpTGZlvO3TgonDhukt15hSZ16r8o/6ILeeyRuP/wxkrQhmnpiXVexK6lpEza8NLfOEb884wJAZBnOZ/oSheAdayN/+uR33fAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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    },
    {
     "label": "251 - 500",
     "url": "61990225f4ae0c27d2886300a1f51c8b",
     "imageData": "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",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "501 - 1,000",
     "url": "dd56be387768b48c574738c59fad023f",
     "imageData": "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",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "1,001 - 16,663",
     "url": "f1ef1828937b002fad3fa60eaa5046be",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAABBElEQVQ4je3SPSjEARjH8c91l7qQqBtkwnZGL8l2yWATnU3KTSZZFaPB4C0lqyibbnaL8hJJFEadwXbJdMPhEnWl7k73l0y+4/P8nm89T0/ELxP5F/7JDds7iD+Rf+YM+R8JG4glWZ5isJPWV94OuNxm55D1oMLQLJvTjH0Jhofp7Sc+QzjDSs3CUVIpRir1mqmfIJVhq9L6kUpDfSTqCFdbK0HXAEMnpGsSRmmqJisNxWip1isjx6NvyPKS47xm4T1rFyR7Pk9WTprTY25rFu5y18ZCiMVuGkv1Ava5fmAy8B8usVHg6Ia5FtqL5LMcRZnfoxhY+MEqVxgXgEiQ8L9QJd4BGLM3I8TafQ8AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "milligrams per liter"
    }
   ]
  }
 ]
}