Dt5 — Compton City Council, June 28, 2022 (part 10 of 11)

FINDINGS
Address Researched Address Not Identified in Research Source 913 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1927, 1926, 1925, 1924, 1923, 1921, 1920
913 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
914 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
915 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
915 W Magnolia St 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 916 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
916 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 916 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1927, 1926, 1925, 1924, 1923, 1921, 1920
917 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 918 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 918 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 918 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 918B W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 919 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 919 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
919 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 919 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
920 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
920 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 921 W MAGNOLIA 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 921 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
921 W Magnolia St 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 921 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
922 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
923 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 924 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
924 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 924 W 152nd St 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 924 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
925 W 152ND PL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 925 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 925 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 925 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 925 W Magnolia St 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 925 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 926 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 926 W 152ND PL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 926 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 927 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 927 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 927 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 928 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
928 W School St 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 929 W Compton Blvd 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 929 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
929 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1927, 1926, 1925, 1924, 1923, 1921, 1920
930 SCHOOL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 930 W Magnolia St 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 930 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 931 W MAGNOLIA 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 931 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
931 W Magnolia St 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 931 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 932 W 151ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1985, 1980, 1976, 1975, 1972, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 932 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1972, 1971, 1970, 1969, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 932 W 152ND 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 932 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 933 W 152ND PL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 933 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 933 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 934 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
934 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 934 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1954, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1927, 1926, 1925, 1924, 1923, 1921, 1920
934 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
935 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 935 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 935 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
935 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
936 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
937 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
937 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 937 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 937 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 938 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
939 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
939 W Compton Blvd 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 940 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 940 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 940 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 940 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
940 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 941 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 941 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 941 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
941 W Compton Blvd 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 941 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
941 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 942 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 942 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 942 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
942 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 943 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 943 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 945 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
945 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
945 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 946 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 947 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
948 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 948 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 948 W MAGNOLIA ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1956, 1955, 1952, 1950, 1949, 1948, 1946, 1945, 1944, 1942, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
949 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 949 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
950 W 151ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 950 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
950 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 951 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 953 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
956 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 956 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 957 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 957 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
958 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 958 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 959 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
961 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
962 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 963 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 964 W 151ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 964 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
964 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 965 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 965 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 965 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
966 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 966 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 967 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
969 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
972 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 972 W 152ND 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 972 W 152ND PL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 972 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 973 W 152ND PL 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 973 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 973 W ALMOND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1956, 1955, 1952, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
974 W 151ST ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1956, 1955, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
974 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 975 W 152ND 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 975 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1958, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 975 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1985, 1981, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 979 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 980 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 980 W SCHOOL ST 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

FINDINGS
Address Researched Address Not Identified in Research Source 981 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920
982 W 152ND ST 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 983 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 983 W Compton Blvd 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 985 W Compton Blvd 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 985 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 987 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 989 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2000, 1999, 1996, 1992, 1991, 1990, 1986, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 989 W Compton Blvd 2014, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1985, 1981, 1980, 1976, 1975, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1964, 1963, 1962, 1961, 1960, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920 995 W COMPTON BLVD 2014, 2010, 2006, 2004, 2003, 2001, 2000, 1999, 1996, 1995, 1992, 1991, 1990, 1986, 1981, 1976, 1972, 1971, 1970, 1969, 1967, 1966, 1965, 1963, 1962, 1961, 1958, 1957, 1956, 1955, 1954, 1952, 1951, 1950, 1949, 1948, 1947, 1946, 1945, 1944, 1942, 1940, 1939, 1938, 1937, 1936, 1935, 1934, 1933, 1932, 1931, 1930, 1929, 1928, 1927, 1926, 1925, 1924, 1923, 1921, 1920

PHASE I ENVIRONMENTAL SITE ASSESSMENT
930 COMPTON BOULEVARD

COMPTON, CALIFORNIA
Project No.: 185804169

AGENCY RECORDS
From: David Coscia
To: Jansen, Alicia
Subject: Public Records Request - 930 Compton Blvd, 90220 Date: Wednesday, April 11, 2018 10:33:00 AM
Hello Alicia
Per your request, County of Los Angeles Public Works has no records for this site.

Regards,
Mr. David Coscia
Program Manager II
Los Angeles County Public Works
(626) 458-3519

From: Negrini, Camille
To: Jansen, Alicia
Subject: 18-1479
Date: Monday, April 23, 2018 2:29:16 PM
Attachments: image001.png
image003.png
The Los Angeles County Fire Department, Health Hazardous Materials Division, being the custodian or keeper of records, certify that a thorough search for the records you requested has been carried out.

Re: (930 W Compton Blvd, Compton CA 90220)
This search revealed that no records were found for the above noted address.

It should be understood that this does not mean that the records you requested do not exist. It is possible that such records may be misfiled; exist under another spelling, another name, or may have been destoyed based on this Department’s Record Retention Policy. However, with the information furnished to our office, and to the best of our knowledge, no records were located.

If you have any questions regarding your request, please contact our office at (310) 534-6270.

Los Angeles County Fire Department
Health Hazardous Materials Division
Inspection Section / Southwest District
HHMD Website

PHASE II ENVIRONMENTAL SITE

ASSESSMENT
930 Compton Boulevard,
Compton, California 90220
Stantec Project No: 185804169
Prepared for:

City Ventures Homebuilding, LLC
3121 Michelson Drive, Suite 150
Irvine, California 92612
Prepared by:

Stantec Consulting Services Inc.
735 E. Carnegie Drive, Suite 280
San Bernardino, CA 92408
May 8, 2019
Sign-off Sheet
This PHASE II ENVIRONMENTAL SITE ASSESSMENT was prepared by Stantec Consulting Services Inc. for City Ventures Home Building, LLC. The material in it reflects Stantec’s best judgment in light of the information available to it at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions made based on it, are the responsibilities of such third parties. Stantec Consulting Services Inc. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report.

Author
(signature)
Deborah Hernandez
Geologic Staff
Quality Reviewer
(signature)
Alicia Jansen
Associate Scientist
Independent Reviewer
(signature)
Kyle Emerson, CEG
Managing Principal Geologist

PHASE II ENVIRONMENTAL SITE ASSESSMENT
pc v:\1858\active\185804169\05_report_deliv\deliverables\reports\phase ii\final_cv_compton_compton_blvd_phiiesa.docx i Table of Contents
EXECUTIVE SUMMARY ............................................................................................................... I

1.0 INTRODUCTION ...........................................................................................................1.1

1.1 PROPERTY DESCRIPTION AND OPERATIONS ............................................................... 1.1

1.2 PROPERTY GEOLOGY AND HYDROGEOLOGY........................................................... 1.1

2.0 BACKGROUND INFORMATION...................................................................................2.1

3.0 FIELD INVESTIGATION PROGRAM...............................................................................3.1

3.1 SCOPE OF WORK ........................................................................................................... 3.1

3.2 SAMPLING PROCEDURES .............................................................................................. 3.1

3.3 BORING ABANDONMENT PROCEDURES ..................................................................... 3.2

3.4 DECONTAMINATION PROCEDURES ............................................................................. 3.2

3.5 WASTE DISPOSAL ............................................................................................................ 3.2

4.0 LABORATORY TESTING PROGRAM .............................................................................4.1

5.0 INVESTIGATION RESULTS .............................................................................................5.1

5.1 FIELD OBSERVATIONS..................................................................................................... 5.1

5.2 ANALYTICAL RESULTS ..................................................................................................... 5.1

6.0 LIMITATIONS ................................................................................................................6.1

7.0 REFERENCES.................................................................................................................7.1

LIST OF TABLES
Table 1 – Summary of Soil Analytical Results - Arsenic and Lead Table 2 – Summary of Soil Analytical Results - Pesticides

LIST OF FIGURES
Figure 1 – Property Location Map
Figure 2 – Property Details

LIST OF APPENDICES
Appendix A – Laboratory Data Sheets and QA/QC Results

PHASE II ENVIRONMENTAL SITE ASSESSMENT
i
Executive Summary
The subject property consists of approximately 2.45 acres of vacant land located at 930 Compton Boulevard in Compton, California (the “Property” or the “Site”). The Property was previously developed with a convalescent hospital. The surrounding area is a mixture of commercial and residential properties. Stantec previously completed a Phase I Environmental Site Assessment (ESA) report for the Property, dated April 27, 2018.

The Phase I Environmental Site Assessment had identified the following recognized environmental conditions (RECs) in connection with the Property:
• Historical Agricultural Use. Based on review of historical documents including aerial photographs and topographic maps, the Property appears to have been used for light agricultural use until circa 1950. Historical agricultural use is considered a REC to the Property. Accordingly, Stantec recommends performing a shallow soil assessment at the Property to evaluate whether residual pesticides or heavy metals associated with historical herbicide applications are present above regulatory screening levels, human health risk criteria or California hazardous waste levels.

To address these recommendations, Stantec performed a Phase II ESA (i.e., subsurface investigation) on April 24, 2019. The Phase II ESA involved the advancement of six (6) shallow soil borings throughout the Property to a depth of 3.0 feet below ground surface (bgs) and collection of soil samples a depth of 1.0 and 3.0 feet bgs. Soil boring locations are notated in Figure 2. The

1.0 feet bgs soil samples from each boring were analyzed for Organochlorine Pesticides (OCP) by EPA test method 8081 and arsenic and lead by EPA test method 6010B. Stantec concludes that this scope of work was sufficient for evaluating the historical agricultural use of the Property.

The results of the analysis of the soil samples reported 4,4'-DDE in sample HA-2-1 at 0.0022 milligrams per kilogram (mg/kg). Additionally, sample HA-6-1 showed concentrations of 4,4'-DDE and 4,4'- DDT reported at 0.0046 and 0.0036, respectively. None of the detections of organochlorine pesticides were above their respective United States Regional Screening Levels (US EPA RSLs) for residential sites. Therefore, the detected levels of organochlorine pesticides do not represent a Recognized Environmental Condition and Stantec recommends no further investigation regarding this issue.

Arsenic was reported above US EPA RSLs for residential sites in five of the six soil samples at concentrations ranging from 1.3 to 4.1 milligrams per kilogram (mg/kg). However, arsenic typically occurs naturally throughout soil in the State of California at levels significantly exceeding the RSL (i.e., the naturally-occurring levels typically range from 0.6 to 12.0 mg/kg). Therefore, reported arsenic concentrations are well within the range of naturally-occurring expected background levels for arsenic in California. Lead was reported in all of six samples collected at concentrations ranging from 4.2 to 19 mg/kg, which are well below the residential soil screening level of 80 mg/kg.

PHASE II ENVIRONMENTAL SITE ASSESSMENT
ii
Therefore, the metals associated with herbicide application do not represent a Recognized Environmental Condition and Stantec recommends no further investigation regarding this issue.

Certified analytical reports with chain of custody documentation are provided in Appendix A.

Based on the above results, Stantec concludes that the historical agricultural use of the Property does not represent a REC or a human health risk, in light of the contemplated residential use of the Property, and recommends no further investigation regarding this issue.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

INTRODUCTION
May 8, 2019

1.1 1.0 INTRODUCTION
This report documents the methodology and results of a Phase II Environmental Site Assessment (ESA) completed by Stantec Consulting Services Inc. (Stantec) for the real property that approximately 2.4 acres in size and previously developed as a convalescent hospital, located at 930 Compton Boulevard, Compton California (the “Property”). A property location map is illustrated on Figure 1. A property details map illustrating the main features of the Property is provided as Figure 2.

The completed work was conducted in accordance with the Master Services Agreement between Stantec and City Ventures (the “Client”). The scope of work and the results of the investigation are described in subsequent sections. The following subsections provide the property description and a summary of past operations. In the event of any conflict between the terms and conditions of this report and the terms and conditions of the MSA, the MSA shall control.

1.1 PROPERTY DESCRIPTION AND OPERATIONS
The Property consists of approximately 2.45 acres of vacant land. The Property was previously developed with a convalescent hospital. The surrounding area is a mixture of commercial and residential properties. A Property location map is illustrated on Figure 1. A Property Vicinity Plan illustrating the main features of the Property is provided as Figure 2. Photographs taken during the site reconnaissance visit are provided in Appendix A.

1.2 PROPERTY GEOLOGY AND HYDROGEOLOGY
The Property is located in Los Angeles County. The area is located within the Peninsular Ranges Geomorphic Province, which includes northwest-southeast trending mountain ranges and valleys that have been developed by the San Andreas Fault system (California Geological Survey [“CGS”], 2002). The vicinity consists of recent-age alluvium (CDMG, 1962). Soil at a facility 1,500 feet to the west is reportedly sand (Geotracker, 2015).

According to data presented in Adanta Inc.’s Supplemental Soil Sampling Report dated July 13, 2017 for the Hooper’s Carpet located approximately 130 feet to the northwest, subsurface conditions in the Property vicinity consist of brown sandy clay and clay to approximately 10 feet below ground surface (bgs) underlain by silty sand and sandy silt to approximately 66.5 feet bgs, maximum depth advanced.

The Property is located within the Coastal Plain of Los Angeles Groundwater Basin, Central Subbasin (4-11.04). The basin is located within the southeastern portion of Los Angeles County. The basin is constrained by the La Brea high to the north, bedrock core complexes to the northeast and east, a drainage province boundary to the southeast, and the Newport-Inglewood Fault to the southwest. Two forebays and one pressure area are present in the basin and water-bearing units consist of sand, gravel and clay up to 2,200 feet in thickness (Department of Water Resources [DWR], 2004).

PHASE II ENVIRONMENTAL SITE ASSESSMENT

INTRODUCTION
May 8, 2019

1.2 According to data presented in Central Congregation of Jehovah’s Witnesses Semi-Annual Groundwater Monitoring Report 2nd Half 2017 located at 1914 West Compton Boulevard, depth to groundwater in the Property vicinity was reported between 36.59 to 45.26 feet bgs with a groundwater flow direction to the northwest.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

BACKGROUND INFORMATION
May 8, 2019

2.1 2.0 BACKGROUND INFORMATION
Stantec completed a Phase I Environmental Site Assessment (ESA) for the Property and identified the following recognized environmental conditions (RECs) associated with the Property:
• Historical Agricultural Use. Based on review of historical documents including aerial photographs and topographic maps, the Property appears to have been used for light agricultural use until circa 1950. Historical agricultural use is considered a REC to the Property. Accordingly, Stantec recommends performing a shallow soil assessment at the Property to evaluate whether residual pesticides or heavy metals associated with historical herbicide applications are present above regulatory screening levels, human health risk criteria or California hazardous waste levels.

Based on these findings a Phase II ESA was recommended for the property. The results of that Phase II ESA are presented below and show that the historical agricultural use does not represent a recognized environmental condition under ASTM E 1527-13.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

FIELD INVESTIGATION PROGRAM
May 8, 2019

3.1 3.0 FIELD INVESTIGATION PROGRAM

3.1 SCOPE OF WORK
The scope of work consisted of the following general elements:

Pre-Drilling Activities
Prior to the commencement of fieldwork activities Stantec made the following preparations:
• As required by law, Stantec visited the Property to mark the proposed boring locations and acquire a current Underground Service Alert (USA) ticket number prior to commencement of Property drilling activities.
• In accordance with federal OSHA regulations (29 CFR, Section 1910.120), Stantec developed a site-specific Health and Safety Plan (HASP) for the subject property. All Stantec personnel and subcontractors associated with the project were required to be familiar with, and comply with, all provisions of the HASP.

Field Investigation
Stantec provided the services of a field geologist or engineer to supervise and direct all onsite activities. All work was conducted under the supervision of a State of California registered professional and include the following:
• On April 24, 2019, six soil borings (HA-1 through HA-6) were advanced to a depth of 3 feet bgs with soil samples collected at 0.5 to 1.0 foot and 2.5 to 3.0 feet. The soil borings were located at location on the Property where historical agricultural use was noted on aerial photographs. The 1.0 foot soil samples were analyzed for pesticides, lead, and arsenic with the 3 foot soil samples placed on hold pending results from the 1.0 foot samples.

Stantec concludes that this scope of work was sufficient for evaluating the issues identified by the Phase I Environmental Site Assessment.

3.2 SAMPLING PROCEDURES
Soil Sampling
During the investigation, soil samples were collected at depths of 0.5 to 1.0 feet and 2.5 to 3.0 feet.

Upon advancement of the hand auger to the desired depth, the auger was withdrawn from the boring, and the contents of the auger bucket were discharged into a clean 8-ounce glass jar provided by the laboratory, and sealed with a threaded Teflon lined lid.

All soil sample containers were sealed tightly and labeled with appropriate identification information (boring number, sample depth, sample collection date, and sample collection time).

The samples were then logged on a chain-of-custody form and placed in a cooler for transport to the laboratory. Copies of the chain-of-custody forms are included as Appendix A.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

FIELD INVESTIGATION PROGRAM
May 8, 2019

3.2 3.3 BORING ABANDONMENT PROCEDURES
Following the completion of drilling and soil sampling, borings were abandoned by removing the sampling equipment from the borehole and subsequently backfilling with soil cuttings.

3.4 DECONTAMINATION PROCEDURES
To maintain quality control during soil sampling, prior to each sampling interval, the sampling equipment was decontaminated in an Alconox scrub solution and double-rinsed, first with tap water followed by a final rinse using distilled water.

3.5 WASTE DISPOSAL
All soil cuttings generated during this investigation were used to backfill the boring.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

LABORATORY TESTING PROGRAM
May 8, 2019

4.1 4.0 LABORATORY TESTING PROGRAM
A total of twelve (12) soil samples from the Property collected during this investigation were delivered under chain-of-custody (Appendix A) to Advanced Technology Laboratories (ATL) based out of Signal Hill, California. ATL is certified to perform hazardous waste testing by the State of California Department of Health Services, Environmental Laboratory Accreditation Program.

Six (6) soil samples were analyzed for arsenic and lead by EPA test method 6010B and organochlorine pesticides by EPA test method 8081A. Analytical results are tabulated in Table 1 and Table 2. Analytical laboratory test results are included in Appendix A and discussed in Section

5.0. PHASE II ENVIRONMENTAL SITE ASSESSMENT

5.1 5.0 INVESTIGATION RESULTS

5.1 FIELD OBSERVATIONS
On April 24, 2019, Stantec personnel advanced six (6) borings at the Property. Soils encountered during the investigation consisted of silty sand. No groundwater was encountered in any of the boreholes. No staining or hydrocarbon odors were observed in any of the boreholes.

5.2 ANALYTICAL RESULTS
The laboratory test results are discussed below. Laboratory test results are summarized in attached Table 1 and Table 2. The complete laboratory analytical test results are presented on the laboratory data sheets attached as Appendix A.

Soil Samples
The results of the analysis of the soil samples reported 4,4'-DDE in sample HA-2-1 at 0.0022 milligrams per kilogram (mg/kg). Additionally, sample HA-6-1 had concentrations of 4,4'-DDE and 4,4'-DDT reported at 0.0046 and 0.0036, respectively. None of the detections of organochlorine pesticides were above their respective United States Regional Screening Levels (US EPA RSLs) for residential sites. Therefore, the detected levels of organochlorine pesticides do not represent a Recognized Environmental Condition and Stantec recommends no further investigation regarding this issue.

Therefore, reported arsenic concentrations are well within the range of naturally-occurring expected background levels for arsenic in California. Lead was reported in all of six samples collected at concentrations ranging from 4.2 to 19 mg/kg, which are well below the residential soil screening level of 80 mg/kg. Therefore, the metals associated with herbicide does not represent a Recognized Environmental Condition and Stantec recommends no further investigation regarding this issue.

Certified analytical reports with chain of custody documentation are provided in Appendix A.

Based on the above results, Stantec concludes that the historical agricultural use of the Property does not represent a REC or a human health risk in light of the contemplated residential use of the Property and recommends no further investigation regarding this issue.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

6.1 6.0 LIMITATIONS
The conclusions presented in this report are professional opinions based on data described in this report. The opinions of this report have been arrived at in accordance with currently accepted hydrogeologic and engineering standards and practices applicable to this location, and are subject to the following inherent limitations. Stantec makes no other warranty, either expressed or implied, concerning the conclusions and professional advice that is contained within the body of this report.

Inherent in most projects performed in a heterogeneous subsurface environment, continuing excavation and assessments may reveal findings that are different than those presented herein.

This facet of the environmental profession should be considered when formulating professional opinions on the limited data collected on these projects.

This report has been issued with the clear understanding that it is the responsibility of the owner, or their representative, to make appropriate notifications to regulatory agencies. It is specifically not the responsibility of Stantec to conduct appropriate notifications as specified by current County and State regulations.

The information presented in this report is valid as of the date our exploration was performed.

Property conditions may degrade with time; consequently, the findings presented herein are subject to change. In the event of any conflict between the terms and conditions of this report and the terms and conditions of the Master Services Agreement (MSA), the MSA shall control.

PHASE II ENVIRONMENTAL SITE ASSESSMENT

7.1 7.0 REFERENCES
American Society for Testing and Materials, Standard Practice for Environmental Site Assessments:

Phase 1 Environmental Site Assessment Process, Designation: E 1527-13, November 2013.

California Department of Conservation, Division of Oil, Gas, and Geothermal Resources (DOG), 2019, website http://maps.conservation.ca.gov/doms/index.html California Geological Survey (CGS), 2019, website http://maps.conservation.ca.gov/cgs/fam/ California Water Resources Control Board (SWRCB), 2019, GeoTracker Database, website download from http://geotracker.swrcb.ca.gov/
Environmental Data Resources, Inc. (EDR), EDR Radius Map with Geocheck, Inquiry Number 5253592.2s, dated April 10, 2018.
_____, Certified Sanborn Map Report, Inquiry Number 5253592.3, dated April 10, 2018. _____, Historical Topographic Map Report, Inquiry Number 5253592.4, dated April 10, 2018 _____, Aerial Photo Decade Package, Inquiry Number 5253592.5, dated April 10, 2018. _____, City Directory Abstract, Inquiry Number 5253592.6, dated April 10, 2018.

Stantec Consulting Services, Inc., 2018, Phase I Environmental Site Assessment, 930 Compton Boulevard, Compton, California 90220, dated April 27, 2018 United States Geological Survey (USGS), 2012, South Gate, 7.5 Minute Topographic Map, Scale 1 inch = 2,400 feet.

United States Geological Survey (USGS), 2019, website
https://earthquake.usgs.gov/cfusion/hazfaults_2008_search/query_main.cfm TABLES
Arsenic Lead

0.68 80

0.6-11.0 12.4 - 97.1
HA-1-1 4/24/2019 1.0 1.3 6.1
HA-2-1 4/24/2019 1.0 1.9 19
HA-3-1 4/24/2019 1.0 2.3 4.2
HA-4-1 4/24/2019 1.0 4.1 4.5
HA-5-1 4/24/2019 1.0 <1.0 10
HA-6-1 4/24/2019 1.0 1.7 13
NOTES:
(1) Refer to Figure 2 for sampling locations
(2) Concentrations reported in milligrams per kilogram (mg/kg), EPA Test Method 6010B < - Indicates the concentration was not detected above the laboratory method reporting limit. -- indicates the sample was not anaylzed
ABBREVIATIONS:

USEPA RSLs - United States Environmental Protection Agency Regional Screening Levels for Residential Soils (May 2016)
BOLD - Indicates the concentration is above the laboratory reporting level Concentration exceeds USEPA Region 9 RLS
Concentration exceeds Southern California regional background levels Table 1
Summary of Soil Analytical Results - Lead & Arsenic
City Ventures - Compton
930 Compton Boulevard, Compton, California
Stantec Project No.: 185804169
Samples
Sample ID (1) Sampling
Date
Sampling
Depth
(ft)
California Background Levels (mg/kg)
USEPA RSLs (mg/kg)
Metals (mg/kg)
EPA 6010B (2)
4,4'-DDD 4,4'-DDE 4,4'-DDT Dieldrin Other OCPs

2.3 2.0 1.9 0.034 varies
Hazardous Waste Levels (mg/Kg) 1.0 1.0 1.0 8.0 varies

NE NE NE NE NE
HA-1-1 1.0 4/24/2019 <0.002 <0.002 <0.002 <0.002 <varies HA-2-1 1.0 4/24/2019 <0.002 0.0022 <0.002 <0.002 <varies HA-3-1 1.0 4/24/2019 <0.002 <0.002 <0.002 <0.002 <varies HA-4-1 1.0 4/24/2019 <0.002 <0.002 <0.002 <0.002 <varies HA-5-1 1.0 4/5/2019 <0.002 <0.002 <0.002 <0.002 <varies HA-6-1 1.0 4/9/2019 <0.002 0.0046 0.0034 <0.002 <varies NOTES: ABBREVIATIONS:
(1) Sample depth is reported as feet below ground surface DTSC - Department of Toxic Substances Control HERO - Human and Ecological Risk Office
NA - Not analyzed
All concentrations reported in milligrams of metal per kilogram of soil (mg/kg) ND - Not detected < - Indicates the concentration was not detected above the laboratory method reporting limit. NE - Not established BOLD - Indicates the concentration is above the laboratory reporting level USEPA RSL - Concentration exceeds USEPA Region 9 RLS
Concentration exceeds Southern California regional background levels Screening Levels for residential soil (mg/Kg) (2)
Typical Background Levels in California
(2) Screening level value is determined by the more conservative value from the California DTSC HERO Note 3 or USEPA RSLs.

United States
Environmental
Protection Agency
Regional Screening

Table 2
Summary of Soil Analytical Results - Pesticides
City Ventures - Compton
930 Compton Boulevard, Compton, California
Stantec Project No.: 185804169
r Depth (1) Date Pesticides (EPA Test Method 8081A)
Samples

FIGURES

APPENDIX A

LABORATORY DATA SHEETS AND QA/QC RESULTS
May 01, 2019
735 E. Carnegie Drive, Suite 280
San Bernardino, CA 92408
Alicia Jansen
Tel: (909) 335-6116
Fax:(909) 335-6120
Stantec
ELAP No.: 1838
CSDLAC No.: 10196
ORELAP No.: CA300003
Re: ATL Work Order Number :

Client Reference :
1901660
Enclosed are the results for sample(s) received on April 24, 2019 by Advanced Technology Laboratories. The sample(s) are tested for the parameters as indicated on the enclosed chain of custody in accordance with applicable laboratory certifications. The laboratory results contained in this report specifically pertains to the sample(s) submitted.

Thank you for the opportunity to serve the needs of your company. If you have any questions, please feel free to contact me or your Project Manager.

Sincerely,
Laboratory Director
CV Compton, 185804169
Eddie Rodriguez
3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 www.atlglobal.com
The cover letter and the case narrative are an integral part of this analytical report and its absence renders the report invalid.

Test results contained within this data package meet the requirements of applicable state-specific certification programs. The report cannot be reproduced without written permission from the client and Advanced Technology Laboratories.

Page 1 of 17 ends

735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Sample ID Laboratory ID Matrix Date Sampled Date Received

SUMMARY OF SAMPLES
HA-1-1 1901660-02 Soil 4/24/19 7:10 4/24/19 10:12
HA-2-1 1901660-03 Soil 4/24/19 7:45 4/24/19 10:12
HA-3-1 1901660-05 Soil 4/24/19 8:15 4/24/19 10:12
HA-4-1 1901660-07 Soil 4/24/19 8:40 4/24/19 10:12
HA-5-1 1901660-09 Soil 4/24/19 9:10 4/24/19 10:12
HA-6-1 1901660-11 Soil 4/24/19 9:45 4/24/19 10:12
3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 2 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-02
Client Sample ID HA-1-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic 1.3 1.0 1 B9D1193 04/30/2019 04/30/19 13:26
Lead 6.1 1.0 1 B9D1193 04/30/2019 04/30/19 13:26
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41
4,4¥-DDE ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41
4,4¥-DDT ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41
Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
Chlordane ND 8.5 1 B9D1238 04/29/2019 04/29/19 17:41
delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:41 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
gamma-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:41 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 17:41 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 17:41
Surrogate: Decachlorobiphenyl 45.5 % 32 - 91 B9D1238 04/29/2019 04/29/19 17:41 Surrogate: Tetrachloro-m-xylene 52.2 % 38 - 93 B9D1238 04/29/2019 04/29/19 17:41 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 3 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-03
Client Sample ID HA-2-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic 1.9 1.0 1 B9D1193 04/30/2019 04/30/19 13:30
Lead 19 1.0 1 B9D1193 04/30/2019 04/30/19 13:30
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51
4,4¥-DDE [2C] 2.2 2.0 1 B9D1238 04/29/2019 04/29/19 17:51 4,4¥-DDT ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51
Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
Chlordane ND 8.5 1 B9D1238 04/29/2019 04/29/19 17:51
delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 17:51 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
gamma-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 17:51 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 17:51 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 17:51
Surrogate: Decachlorobiphenyl 49.0 % 32 - 91 B9D1238 04/29/2019 04/29/19 17:51 Surrogate: Tetrachloro-m-xylene 73.7 % 38 - 93 B9D1238 04/29/2019 04/29/19 17:51 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 4 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-05
Client Sample ID HA-3-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic 2.3 1.0 1 B9D1193 04/30/2019 04/30/19 13:31
Lead 4.2 1.0 1 B9D1193 04/30/2019 04/30/19 13:31
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01
4,4¥-DDE ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01
4,4¥-DDT ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01
Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
Chlordane ND 8.5 1 B9D1238 04/29/2019 04/29/19 18:01
delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:01 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
gamma-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:01 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 18:01 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 18:01
Surrogate: Decachlorobiphenyl 57.2 % 32 - 91 B9D1238 04/29/2019 04/29/19 18:01 Surrogate: Tetrachloro-m-xylene 65.3 % 38 - 93 B9D1238 04/29/2019 04/29/19 18:01 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 5 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-07
Client Sample ID HA-4-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic 4.1 1.0 1 B9D1193 04/30/2019 04/30/19 13:32
Lead 4.5 1.0 1 B9D1193 04/30/2019 04/30/19 13:32
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12
4,4¥-DDE ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12
4,4¥-DDT ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12
Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
Chlordane ND 8.5 1 B9D1238 04/29/2019 04/29/19 18:12
delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:12 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
gamma-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:12 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 18:12 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 18:12
Surrogate: Decachlorobiphenyl 51.9 % 32 - 91 B9D1238 04/29/2019 04/29/19 18:12 Surrogate: Tetrachloro-m-xylene 70.9 % 38 - 93 B9D1238 04/29/2019 04/29/19 18:12 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 6 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-09
Client Sample ID HA-5-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic ND 1.0 1 B9D1193 04/30/2019 04/30/19 13:33
Lead 10 1.0 1 B9D1193 04/30/2019 04/30/19 13:33
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22
4,4¥-DDE [2C] ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 4,4¥-DDT [2C] ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
Chlordane ND 8.5 1 B9D1238 04/29/2019 04/29/19 18:22
delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:22 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
gamma-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:22 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 18:22 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 18:22
Surrogate: Decachlorobiphenyl 54.2 % 32 - 91 B9D1238 04/29/2019 04/29/19 18:22 Surrogate: Tetrachloro-m-xylene 81.9 % 38 - 93 B9D1238 04/29/2019 04/29/19 18:22 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 7 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Lab ID: 1901660-11
Client Sample ID HA-6-1
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Total Metals by ICP-AES EPA 6010B Analyst: GO
Result
(mg/kg) (mg/kg)
PQL
Arsenic 1.7 1.0 1 B9D1193 04/30/2019 04/30/19 13:34
Lead 13 1.0 1 B9D1193 04/30/2019 04/30/19 13:34
Notes
Date/Time
Analyte Dilution Batch Prepared Analyzed
Organochlorine Pesticides by EPA 8081 Analyst: KD/
Result
(ug/kg) (ug/kg)
PQL
4,4¥-DDD ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33
4,4¥-DDE [2C] 4.6 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 4,4¥-DDT [2C] 3.4 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 Aldrin ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
alpha-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
alpha-Chlordane ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33 beta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
Chlordane [2C] ND 8.5 1 B9D1238 04/29/2019 04/29/19 18:33 delta-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
Dieldrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33
Endosulfan I ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33 Endosulfan II ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 Endosulfan sulfate ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 Endrin ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33
Endrin aldehyde ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 Endrin ketone ND 2.0 1 B9D1238 04/29/2019 04/29/19 18:33 gamma-BHC ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
gamma-Chlordane [2C] ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33 Heptachlor ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33
Heptachlor epoxide ND 1.0 1 B9D1238 04/29/2019 04/29/19 18:33 Methoxychlor ND 5.0 1 B9D1238 04/29/2019 04/29/19 18:33 Toxaphene ND 50 1 B9D1238 04/29/2019 04/29/19 18:33
Surrogate: Decachlorobiphenyl 50.3 % 32 - 91 B9D1238 04/29/2019 04/29/19 18:33 Surrogate: Tetrachloro-m-xylene 73.1 % 38 - 93 B9D1238 04/29/2019 04/29/19 18:33 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 8 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis

QUALITY CONTROL SECTION
Total Metals by ICP-AES EPA 6010B - Quality Control
Analyte
Result PQL Spike
Level
Source
Result % Rec
% Rec
Limits RPD
RPD
(mg/kg) (mg/kg) Limit Notes
MDL
(mg/kg)
Batch B9D1193 - EPA 3050B_S
Blank (B9D1193-BLK1) Prepared: 4/30/2019 Analyzed: 4/30/2019 Arsenic ND 1.0 0.12
Lead ND 1.0 0.18
LCS (B9D1193-BS1) Prepared: 4/30/2019 Analyzed: 4/30/2019 Arsenic 44.2783 1.0 0.12 50.0000 88.6 80 - 120
Lead 44.8707 1.0 0.18 50.0000 89.7 80 - 120
Matrix Spike (B9D1193-MS1) Source: 1901660-02 Prepared: 4/30/2019 Analyzed: 4/30/2019 Arsenic 91.2624 1.0 0.12 124.378 1.27926 72.3 49 - 96
Lead 91.9805 1.0 0.18 124.378 6.08868 69.1 29 - 126
Matrix Spike Dup (B9D1193-MSD1) Source: 1901660-02 Prepared: 4/30/2019 Analyzed: 4/30/2019 Arsenic 91.7811 1.0 0.12 125.000 1.27926 72.4 49 - 96 0.567 20 Lead 92.5801 1.0 0.18 125.000 6.08868 69.2 29 - 126 0.650 20 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 9 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Organochlorine Pesticides by EPA 8081 - Quality Control Analyte
Result PQL Spike
Level
Source
Result % Rec
% Rec
Limits RPD
RPD
(ug/kg) (ug/kg) Limit Notes
MDL
(ug/kg)
Batch B9D1238 - GCSEMI_PCB/PEST_S
Blank (B9D1238-BLK1) Prepared: 4/29/2019 Analyzed: 4/29/2019 4,4¥-DDD ND 2.0 0.07
4,4¥-DDD [2C] ND 2.0 0.07
4,4¥-DDE ND 2.0 0.11
4,4¥-DDE [2C] ND 2.0 0.11
4,4¥-DDT ND 2.0 0.10
4,4¥-DDT [2C] ND 2.0 0.10
Aldrin ND 1.0 0.12
Aldrin [2C] ND 1.0 0.12
alpha-BHC ND 1.0 0.11
alpha-BHC [2C] ND 1.0 0.11
alpha-Chlordane ND 1.0 0.12
alpha-Chlordane [2C] ND 1.0 0.12
beta-BHC ND 1.0 0.06
beta-BHC [2C] ND 1.0 0.06
Chlordane ND 8.5 1.1
Chlordane [2C] ND 8.5 1.1
delta-BHC ND 1.0 0.12
delta-BHC [2C] ND 1.0 0.12
Dieldrin ND 2.0 0.26
Dieldrin [2C] ND 2.0 0.26
Endosulfan I ND 1.0 0.10
Endosulfan I [2C] ND 1.0 0.10
Endosulfan II ND 2.0 0.15
Endosulfan II [2C] ND 2.0 0.15
Endosulfan sulfate ND 2.0 0.16
Endosulfan Sulfate [2C] ND 2.0 0.16
Endrin ND 2.0 0.14
Endrin [2C] ND 2.0 0.14
Endrin aldehyde ND 2.0 0.31
Endrin aldehyde [2C] ND 2.0 0.31
Endrin ketone ND 2.0 0.13
Endrin ketone [2C] ND 2.0 0.13
gamma-BHC ND 1.0 0.10
gamma-BHC [2C] ND 1.0 0.10
gamma-Chlordane ND 1.0 0.89
gamma-Chlordane [2C] ND 1.0 0.89
Heptachlor ND 1.0 0.12
Heptachlor [2C] ND 1.0 0.12
Heptachlor epoxide ND 1.0 0.09
Heptachlor epoxide [2C] ND 1.0 0.09
Methoxychlor ND 5.0 0.18
3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 10 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Analyte
Result PQL Spike
Level
Source
Result % Rec
% Rec
Limits RPD
RPD
(ug/kg) (ug/kg) Limit Notes
Organochlorine Pesticides by EPA 8081 - Quality Control (cont'd) MDL
(ug/kg)
Batch B9D1238 - GCSEMI_PCB/PEST_S (continued)
Blank (B9D1238-BLK1) - Continued Prepared: 4/29/2019 Analyzed: 4/29/2019 Methoxychlor [2C] ND 5.0 0.18
Toxaphene ND 50 4.7
Toxaphene [2C] ND 50 4.7
Surrogate: Decachlorobiphenyl 11.67 16.6667 70.0 32 - 91 Surrogate: Decachlorobiphenyl [ 11.15 16.6667 66.9 32 - 91 Surrogate: Tetrachloro-m-xylene 11.72 16.6667 70.3 38 - 93 Surrogate: Tetrachloro-m-xylene 12.31 16.6667 73.9 38 - 93 LCS (B9D1238-BS1) Prepared: 4/29/2019 Analyzed: 4/29/2019 4,4¥-DDD 12.3362 2.0 0.07 16.6667 74.0 66 - 112
4,4¥-DDD [2C] 12.1298 2.0 0.07 16.6667 72.8 66 - 112
4,4¥-DDE 12.4562 2.0 0.11 16.6667 74.7 62 - 112
4,4¥-DDE [2C] 13.0710 2.0 0.11 16.6667 78.4 62 - 112
4,4¥-DDT 12.0140 2.0 0.10 16.6667 72.1 48 - 90
4,4¥-DDT [2C] 12.1237 2.0 0.10 16.6667 72.7 48 - 90
Aldrin 12.3463 1.0 0.12 16.6667 74.1 58 - 104
Aldrin [2C] 12.9072 1.0 0.12 16.6667 77.4 58 - 104
alpha-BHC 12.0072 1.0 0.11 16.6667 72.0 57 - 105
alpha-BHC [2C] 12.4967 1.0 0.11 16.6667 75.0 57 - 105
alpha-Chlordane 12.2773 1.0 0.12 16.6667 73.7 62 - 108
alpha-Chlordane [2C] 12.7833 1.0 0.12 16.6667 76.7 62 - 108 beta-BHC 11.6513 1.0 0.06 16.6667 69.9 59 - 106
beta-BHC [2C] 12.4323 1.0 0.06 16.6667 74.6 59 - 106
delta-BHC 12.7830 1.0 0.12 16.6667 76.7 63 - 115
delta-BHC [2C] 13.2733 1.0 0.12 16.6667 79.6 63 - 115
Dieldrin 11.8673 2.0 0.26 16.6667 71.2 59 - 102
Dieldrin [2C] 12.1300 2.0 0.26 16.6667 72.8 59 - 102
Endosulfan I 11.3918 1.0 0.10 16.6667 68.4 61 - 99
Endosulfan I [2C] 11.7305 1.0 0.10 16.6667 70.4 61 - 99 Endosulfan II 11.8188 2.0 0.15 16.6667 70.9 65 - 105
Endosulfan II [2C] 11.7683 2.0 0.15 16.6667 70.6 65 - 105 Endosulfan sulfate 11.0713 2.0 0.16 16.6667 66.4 59 - 107 Endosulfan Sulfate [2C] 10.4507 2.0 0.16 16.6667 62.7 59 - 107 Endrin 13.3588 2.0 0.14 16.6667 80.2 65 - 113
Endrin [2C] 12.8722 2.0 0.14 16.6667 77.2 65 - 113
Endrin aldehyde 11.3033 2.0 0.31 16.6667 67.8 61 - 109
Endrin aldehyde [2C] 11.6778 2.0 0.31 16.6667 70.1 61 - 109 Endrin ketone 10.6785 2.0 0.13 16.6667 64.1 56 - 97
Endrin ketone [2C] 10.5147 2.0 0.13 16.6667 63.1 56 - 97 gamma-BHC 12.1808 1.0 0.10 16.6667 73.1 57 - 101
gamma-BHC [2C] 12.8092 1.0 0.10 16.6667 76.9 57 - 101
3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 11 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Analyte
Result PQL Spike
Level
Source
Result % Rec
% Rec
Limits RPD
RPD
(ug/kg) (ug/kg) Limit Notes
Organochlorine Pesticides by EPA 8081 - Quality Control (cont'd) MDL
(ug/kg)
Batch B9D1238 - GCSEMI_PCB/PEST_S (continued)
LCS (B9D1238-BS1) - Continued Prepared: 4/29/2019 Analyzed: 4/29/2019 gamma-Chlordane 12.0672 1.0 0.89 16.6667 72.4 56 - 125
gamma-Chlordane [2C] 12.6185 1.0 0.89 16.6667 75.7 56 - 125 Heptachlor 12.7775 1.0 0.12 16.6667 76.7 61 - 105
Heptachlor [2C] 13.2403 1.0 0.12 16.6667 79.4 61 - 105
Heptachlor epoxide 11.4355 1.0 0.09 16.6667 68.6 59 - 97 Heptachlor epoxide [2C] 11.9838 1.0 0.09 16.6667 71.9 59 - 97 Methoxychlor 12.7437 5.0 0.18 16.6667 76.5 68 - 118
Methoxychlor [2C] 12.9302 5.0 0.18 16.6667 77.6 68 - 118 Surrogate: Decachlorobiphenyl 11.56 16.6667 69.3 32 - 91 Surrogate: Decachlorobiphenyl [ 11.34 16.6667 68.0 32 - 91 Surrogate: Tetrachloro-m-xylene 12.39 16.6667 74.3 38 - 93 Surrogate: Tetrachloro-m-xylene 13.32 16.6667 79.9 38 - 93 Matrix Spike (B9D1238-MS1) Source: 1901660-02 Prepared: 4/29/2019 Analyzed: 4/29/2019 4,4¥-DDD 5.22800 2.0 0.07 16.6667 ND 31.4 33 - 116 M2
4,4¥-DDD [2C] 5.79500 2.0 0.07 16.6667 ND 34.8 33 - 116 4,4¥-DDE 6.09700 2.0 0.11 16.6667 0.187833 35.5 29 - 128 4,4¥-DDE [2C] 6.46100 2.0 0.11 16.6667 0.182667 37.7 29 - 128 4,4¥-DDT 5.79450 2.0 0.10 16.6667 ND 34.8 27 - 109
4,4¥-DDT [2C] 6.24633 2.0 0.10 16.6667 ND 37.5 27 - 109 Aldrin 6.46967 1.0 0.12 16.6667 ND 38.8 34 - 110
Aldrin [2C] 6.71000 1.0 0.12 16.6667 ND 40.3 34 - 110
alpha-BHC 6.37133 1.0 0.11 16.6667 ND 38.2 39 - 107 M2
alpha-BHC [2C] 6.79917 1.0 0.11 16.6667 ND 40.8 39 - 107 alpha-Chlordane 6.03667 1.0 0.12 16.6667 ND 36.2 37 - 111 M2 alpha-Chlordane [2C] 6.52383 1.0 0.12 16.6667 ND 39.1 37 - 111 beta-BHC 3.83567 1.0 0.06 16.6667 ND 23.0 33 - 111 M2
beta-BHC [2C] 3.91300 1.0 0.06 16.6667 ND 23.5 33 - 111 M2 delta-BHC 2.54033 1.0 0.12 16.6667 ND 15.2 25 - 122 M2
delta-BHC [2C] 2.73200 1.0 0.12 16.6667 ND 16.4 25 - 122 M2 Dieldrin 4.14750 2.0 0.26 16.6667 ND 24.9 28 - 114 M2
Dieldrin [2C] 4.40417 2.0 0.26 16.6667 ND 26.4 28 - 114 M2 Endosulfan I 4.81383 1.0 0.10 16.6667 ND 28.9 35 - 107 M2 Endosulfan I [2C] 5.01167 1.0 0.10 16.6667 ND 30.1 35 - 107 M2 Endosulfan II 1.18617 2.0 0.15 16.6667 ND 7.12 13 - 122 M2 Endosulfan II [2C] 1.35533 2.0 0.15 16.6667 ND 8.13 13 - 122 M2 Endosulfan sulfate 0.862500 2.0 0.16 16.6667 ND 5.17 13 - 120 M2 Endosulfan Sulfate [2C] 0.874000 2.0 0.16 16.6667 ND 5.24 13 - 120 M2 Endrin 4.74750 2.0 0.14 16.6667 ND 28.5 31 - 121 M2
Endrin [2C] 5.00467 2.0 0.14 16.6667 ND 30.0 31 - 121 M2 Endrin aldehyde 0.979667 2.0 0.31 16.6667 ND 5.88 18 - 129 M2 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 12 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Analyte
Result PQL Spike
Level
Source
Result % Rec
% Rec
Limits RPD
RPD
(ug/kg) (ug/kg) Limit Notes
Organochlorine Pesticides by EPA 8081 - Quality Control (cont'd) MDL
(ug/kg)
Batch B9D1238 - GCSEMI_PCB/PEST_S (continued)
Matrix Spike (B9D1238-MS1) - Continued Source: 1901660-02 Prepared: 4/29/2019 Analyzed: 4/29/2019 Endrin aldehyde [2C] 0.836500 2.0 0.31 16.6667 ND 5.02 18 - 129 M2 Endrin ketone 1.19933 2.0 0.13 16.6667 ND 7.20 14 - 113 M2 Endrin ketone [2C] 1.18117 2.0 0.13 16.6667 ND 7.09 14 - 113 M2 gamma-BHC 6.15783 1.0 0.10 16.6667 ND 36.9 34 - 104
gamma-BHC [2C] 6.23800 1.0 0.10 16.6667 ND 37.4 34 - 104 gamma-Chlordane 11.1458 1.0 0.89 16.6667 ND 66.9 35 - 121 gamma-Chlordane [2C] 6.02467 1.0 0.89 16.6667 ND 36.1 35 - 121 Heptachlor 6.90650 1.0 0.12 16.6667 ND 41.4 35 - 110
Heptachlor [2C] 7.15100 1.0 0.12 16.6667 ND 42.9 35 - 110 Heptachlor epoxide 5.09900 1.0 0.09 16.6667 ND 30.6 31 - 106 M2 Heptachlor epoxide [2C] 5.25050 1.0 0.09 16.6667 ND 31.5 31 - 106 Methoxychlor 3.00050 5.0 0.18 16.6667 ND 18.0 21 - 128 M2 Methoxychlor [2C] 2.96517 5.0 0.18 16.6667 ND 17.8 21 - 128 M2 Surrogate: Decachlorobiphenyl 5.899 16.6667 35.4 32 - 91 Surrogate: Decachlorobiphenyl [ 6.714 16.6667 40.3 32 - 91 Surrogate: Tetrachloro-m-xylene 7.172 16.6667 43.0 38 - 93 Surrogate: Tetrachloro-m-xylene 7.761 16.6667 46.6 38 - 93 Matrix Spike Dup (B9D1238-MSD1) Source: 1901660-02 Prepared: 4/29/2019 Analyzed: 4/29/2019 4,4¥-DDD 5.31383 2.0 0.07 16.6667 ND 31.9 33 - 116 1.63 20 M2 4,4¥-DDD [2C] 5.56300 2.0 0.07 16.6667 ND 33.4 33 - 116 4.09 20 4,4¥-DDE 6.25800 2.0 0.11 16.6667 0.187833 36.4 29 - 128 2.61 20 4,4¥-DDE [2C] 6.55717 2.0 0.11 16.6667 0.182667 38.2 29 - 128 1.48 20 4,4¥-DDT 5.45450 2.0 0.10 16.6667 ND 32.7 27 - 109 6.04 20 4,4¥-DDT [2C] 5.88950 2.0 0.10 16.6667 ND 35.3 27 - 109 5.88 20 Aldrin 6.99667 1.0 0.12 16.6667 ND 42.0 34 - 110 7.83 20 Aldrin [2C] 7.15783 1.0 0.12 16.6667 ND 42.9 34 - 110 6.46 20 alpha-BHC 7.08283 1.0 0.11 16.6667 ND 42.5 39 - 107 10.6 20 alpha-BHC [2C] 7.33250 1.0 0.11 16.6667 ND 44.0 39 - 107 7.55 20 alpha-Chlordane 6.22433 1.0 0.12 16.6667 ND 37.3 37 - 111 3.06 20 alpha-Chlordane [2C] 6.54850 1.0 0.12 16.6667 ND 39.3 37 - 111 0.377 20 beta-BHC 4.06400 1.0 0.06 16.6667 ND 24.4 33 - 111 5.78 20 M2 beta-BHC [2C] 3.98867 1.0 0.06 16.6667 ND 23.9 33 - 111 1.92 20 M2 delta-BHC 2.87267 1.0 0.12 16.6667 ND 17.2 25 - 122 12.3 20 M2 delta-BHC [2C] 2.99133 1.0 0.12 16.6667 ND 17.9 25 - 122 9.06 20 M2 Dieldrin 4.31533 2.0 0.26 16.6667 ND 25.9 28 - 114 3.97 20 M2 Dieldrin [2C] 4.44967 2.0 0.26 16.6667 ND 26.7 28 - 114 1.03 20 M2 Endosulfan I 4.98550 1.0 0.10 16.6667 ND 29.9 35 - 107 3.50 20 M2 Endosulfan I [2C] 5.09417 1.0 0.10 16.6667 ND 30.6 35 - 107 1.63 20 M2 Endosulfan II 1.43283 2.0 0.15 16.6667 ND 8.60 13 - 122 18.8 20 M2 Endosulfan II [2C] 1.40583 2.0 0.15 16.6667 ND 8.43 13 - 122 3.66 20 M2 3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 13 of 17 735 E. Carnegie Drive, Suite 280
San Bernardino , CA 92408
Project Number :

Report To :

CV Compton, 185804169
Alicia Jansen
Reported : 05/01/2019
Stantec
Certificate of Analysis
Notes and Definitions
M2 Matrix spike recovery outside of acceptance limit due to possible matrix interference. The analytical batch was validated by the laboratory control sample.

ND Analyte is not detected at or above the Practical Quantitation Limit (PQL). When client requests quantitation against MDL, analyte is not detected at or above the Method Detection Limit (MDL) PQL Practical Quantitation Limit
MDL Method Detection Limit
RPD Relative Percent Difference
NR Not Reported
CA2 CA-ELAP (CDPH)
OR1 OR-NELAP (OSPHL)
Notes:
(1) The reported MDL and PQL are based on prep ratio variation and analytical dilution. (2) The suffix [2C] of specific analytes signifies that the reported result is taken from the instrument's second column. (3) Results are wet unless otherwise specified.
3275 Walnut Avenue, Signal Hill, CA 90755 ï Tel: 562-989-4045 ï Fax: 562-989-4040 ï www.atlglobal.com Page 15 of 17

Page 16 of 17 ends

Page 17 of 17 ends

PRELIMINARY HYDROLOGY & HYDRAULICS STUDY
TTM 82807
930 W. COMPTON BOULEVARD
COMPTON, CA 90220
Project Address:
930 W. Compton Boulevard
Compton, CA 90220
Prepared For:

City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
Kim Prijatel, Vice President of Development
(949) 258-7555
Prepared by:

C&V Consulting, Inc.
9830 Irvine Center Drive
Irvine, CA 92618
Philip Malcomson, P.E.

Prepared: August 2019
Revised: March 2021
i
Preliminary Hydrology & Hydraulics Study
For
Tract Map No. 82807

This Hydrology Study was prepared by C&V Consulting, Inc. under the supervision of Philip Malcomson, P.E.
___________________________________ ____________
Philip Malcomson, PE 67819 Date
C&V Consulting, Inc.

TABLE OF CONTENTS
i. Acknowledgement and Signature Page.......................... i I. Purpose............................................................................. 1 II. Introduction..................................................................... 1 III. Methodology.................................................................... 2 IV. Design Assumptions ...................................................... 2 V. Hydraulic Calculations ................................................... 3 VI. Conclusions ..................................................................... 4 VII. References........................................................................ 6

APPENDICES
A. Vicinity Map
B. South Gate Isohyet Map
C. HydroCalc Outputs
D. Existing Conditions Hydrology Map
E. Proposed Conditions Hydrology Map
F. Hydraulic Calculations
G. Detention Calculations
H. LACDPW Allowable Q
1  

The purpose of this report is to provide quantitative information to verify the design of the storm drain infrastructure and hydrologic methodology of the project site. The values and statements within the confirm the subject site is designed and planned in accordance to the Los Angeles County Hydrology Manual and the City of Compton drainage requirements.

II. 
The proposed project comprises a total of 2.45 acres and is located 930 W. Compton Boulevard, in the City of Compton (APN: 6161-001-902). The site is bounded by W. Compton Boulevard to the north, W. 151st Street and existing single-family residential to the south, S. Kemp Avenue and existing single-family residential to the east, and Dwight avenue and a liquor store to the west. Refer to Appendix A for the Vicinity Map.

The development proposes to construct 8 buildings of 60 residential units with private garages, private drive aisles, sidewalks, guest parking areas, and common landscaped areas. The project site will be accessible via two entrances/exits along W. 151st Street.

The existing site is currently vacant, pervious land. Elevations onsite range between approximately 81 feet to 85 feet above mean sea level with a relative low point near the northeast corner of the site. Existing site drainage is generally directed as sheet flow in the northeast direction and overflows into the rights-of-way of W. Compton Boulevard and S. Kemp Avenue. Within W. Compton Boulevard and S. Kemp Avenue, two (2) existing catch basins capture and convey stormwater to an existing Los Angeles County Flood Control District (LACFCD) 66” storm drain facility within W. Compton Boulevard which flows in the easterly direction and outlets to the existing Compton Creek. Compton Creek drains to the existing Los Angeles River and ultimately the Pacific Ocean at San Pedro Bay.

Proposed site drainage will be collected and conveyed by two (2) proposed curb-inlet catch basins and an area drain system to two (2) proposed underground detention systems which will discharge to the existing LACFCD 66” storm drain at two (2) points of connection. Low flows will be directed to proposed Modular Wetlands System (MWS) Biofiltration Vaults for water quality treatment prior to entering the proposed detention systems. During larger storm events, stormwater runoff will bypass the treatment systems and be conveyed directly to the proposed detention system. The detention system will be equipped with an orifice to mitigate the peak discharge rate to the allowable peak flowrate (Allowable Q) provided Los Angeles County Department of Public Works (LACDPW). Excess flows will be temporarily detained as they are released at the Allowable Q. Refer to Appendix H for the Allowable Q provided by LACFCD. 2 III. 
The project site’s drainage was analyzed per the Los Angeles County Hydrology Manual. The existing and proposed conditions of the site were analyzed for peak flow rate and time of concentration for the 25-, 50-, and 100-year storm events based on acreage and land cover per the LACDPW HydroCalc software.

IV. 

1. The LACDPW HydroCalc Calculator Program was used to determine Tc, peak run-off flow rate, and run-off volumes for each subarea.

2. The property is located in the “South Gate” rainfall region, per Figure 1-H1.9 of the Hydrology Manual.

A depth of 6.15 inches of rainfall was used for the 50-year storm.

3. The site is in the soil classification “003” per Figure 1-H1.9 of the Hydrology Manual.

4. The site was analyzed for a 25-year, 50-year, and 100-year storm events. Copies of the HydroCalc output data can be found in Appendix C of this report. The peak runoff values have also been incorporated into the included hydrology exhibits, which are made a part of this study.

5. Proposed storm drains will be sized to convey the 25-year storm per Section 4.3 of the Hydrology Manual.

6. The existing project site is undeveloped and was assumed to be 1% impervious based on recommended values per the Hydrology Manual.

7. The proposed project site was assumed to be approximately 86% impervious based on the development type and recommended values per the Hydrology Manual.

8. Detention Calculations were determined using the LACDPW HydroCalc output values for the 25-year storm event. Refer to Appendix G of this report for detention calculations. 3 V. 
Pipe Sizing
Onsite storm drain piping will be sized for the 25-year storm event and will be analyzed based on open channel flow. Therefore, WSPG hydraulic pressure analysis is not warranted.

Q =
k′
n
𝑑
8 3
⁄
S
1 2
⁄ per King’s Handbook
k’ = 0.463
d = pipe diameter
n=0.013* n=0.013*
S=0.005 S=0.010
Pipe Diameter Max. Q (cfs) Pipe Diameter Max. Q (cfs)
8” 0.854 8” 1.208
12” 2.518 12” 3.562
15” 4.566 15” 6.457
18” 7.425 18” 10.501
24” 15.991 24” 22.614
36” 47.146 36” 66.675
*A Manning’s Roughness Coefficient of 0.013 has been utilized to represent the roughness coefficient of PVC and/or HDPE piping.

Catch Basin Sizing
Catch Basin Sizing will be provided during final engineering. 100-Year Water Surface Elevation (WSE)
The elevation of the 100-year water surface will be analyzed during final engineering. Building finished floors will be set at a minimum of at least 1 foot above the 100-year WSE. 4 VI. 
Below is a summary of the project site existing and proposed conditions peak runoff values.

DA Q25 (cfs) Q50 (cfs) Q100 (cfs)
Existing Condition X1 1.70 2.53 3.59
Proposed Condition
1 2.94 3.37 3.80
2 3.70 4.24 4.78
Total 6.62 7.59 8.56
Refer to Appendix C of this report for additional information and LACDPW HydroCalc output data.

Since this project proposes to drain directly to the existing LACFCD 66” storm drain facility within W.

Compton Boulevard, LACDPW provided an Allowable Q of 1.10 cfs/acre of for the proposed development. The product of the Allowable Q (cfs/acre) and the acreage for each drainage area is the total Allowable Q (cfs) for each drainage area.

The onsite detention required to mitigate the proposed condition peak flowrate during the 25-year storm event to the Allowable Q was calculated by utilizing the 25-year storm event hydrographs generated by the LACDPW HydroCalc software and the total Allowable Q. The area under the hydrograph for all flowrates greater than the total Allowable Q equals the amount of detention required. The results are summarized below:

Drainage
Area
Acreage Allowable Q (cfs)
(Acreage x 1.1 cfs/acre)
Required
Storage (cf)
Provided Storage
1 1.085 1.194 1,243.8 70 lf of 60” pipe → 1,374.5 cf
2 1.365 1.501 1,564.8 100 lf of 60” pipe → 1,963.5 cf
Total 2.45 2.695 2,722 3,338 cf
Refer to Appendix G for detention calculations.

After the required amount of detention was determined, the orifice diameter required to mitigate the discharge rate was calculated by utilizing the following equation:

𝑂 = 𝐾𝐴√2𝑔ℎ per King’s Handbook
Where, O = orifice outflow (cfs)
K = constant, 0.65
A = area of orifice (sf)
g = acceleration due to gravity (32.2 ft/s2)
h = hydraulic head above orifice (60” pipe → h = 5 ft)
5 After solving the orifice equation for the area, the minimum required diameter for each drainage area was calculated. Orifice calculations for mitigating the 25-year storm event to the Allowable Q for each drainage area (DA) are shown below:

𝐃𝐀 𝟏
Acreage = 1.085
Allowable Q = 1.194 cfs
A =
O
K√2gh
A =

1.194 cfs

0.65√(2)(32.2
ft
s
⁄ 2)(5 ft)
= 0.1024 ft
2 A = (
π
4 )D
2 → D = √
4 π
A
D = √
4 π
(0.1024 ft
2) = 0.361 ft
= 4.33 in → use 4.25" orifice
O = (0.65) (
π
4 ) (

4.25 12 ft)
2 √(2)(32.2
ft
s
⁄ 2)(5 ft) = 1.149 cfs < 1.194 cfs✓
𝐃𝐀 𝟐
Acreage = 1.365
Allowable Q = 1.501 cfs
A =
O
K√2gh
A =

1.501 cfs

0.65√(2)(32.2
ft
s
⁄ 2)(5 ft)
= 0.1287 ft
2 A = (
π
4 )D
2 → D = √
4 π
A
D = √
4 π
(0.1287 ft
2) = 0.405 ft
= 4.85 in → use 4.75" orifice
O = (0.65) (
π
4 ) (

4.75 12 ft)
2 √(2)(32.2
ft
s
⁄ 2)(5 ft) = 1.435 cfs < 1.501 cfs✓
6 VII. 

1. Los Angeles County Department of Public Works (LACDPW) Hydrology Manual, January 2006.

2. LACDPW HydroCalc Program was utilized to determine flow rates and time of concentrations.

3. Existing and Proposed Conditions Hydrology Maps for Tract Map No. 82807, prepared by C&V Consulting, Inc., August 2019

4. KING, HORACE WILLIAMS. HANDBOOK OF HYDRAULICS: for the Solution of Hydraulic Problems (Classic Reprint). FORGOTTEN Books, 2015

APPENDIX A

VICINITY MAP

APPENDIX B

SOUTH GATE ISOHYETAL MAP

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APPENDIX C

HYDROCALC OUTPUTS

EXISTING CONDITIONS CALCULATIONS
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20190812/DA X1_Q25.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA X1
Area (ac) 2.457
Flow Path Length (ft) 418.0
Flow Path Slope (vft/hft) 0.0086
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.01
Soil Type 3
Design Storm Frequency 25-yr
Fire Factor 0
LID False
Output Results
Modeled (25-yr) Rainfall Depth (in) 5.3997
Peak Intensity (in/hr) 2.0561
Undeveloped Runoff Coefficient (Cu) 0.3303
Developed Runoff Coefficient (Cd) 0.336
Time of Concentration (min) 13.0
Clear Peak Flow Rate (cfs) 1.6973
Burned Peak Flow Rate (cfs) 1.6973
24-Hr Clear Runoff Volume (ac-ft) 0.1372
24-Hr Clear Runoff Volume (cu-ft) 5975.4147
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20190812/DA X1_Q50.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA X1
Area (ac) 2.457
Flow Path Length (ft) 418.0
Flow Path Slope (vft/hft) 0.0086
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.01
Soil Type 3
Design Storm Frequency 50-yr
Fire Factor 0
LID False
Output Results
Modeled (50-yr) Rainfall Depth (in) 6.15
Peak Intensity (in/hr) 2.533
Undeveloped Runoff Coefficient (Cu) 0.401
Developed Runoff Coefficient (Cd) 0.406
Time of Concentration (min) 11.0
Clear Peak Flow Rate (cfs) 2.527
Burned Peak Flow Rate (cfs) 2.527
24-Hr Clear Runoff Volume (ac-ft) 0.1631
24-Hr Clear Runoff Volume (cu-ft) 7102.5288
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20190812/DA X1_Q100.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA X1
Area (ac) 2.457
Flow Path Length (ft) 418.0
Flow Path Slope (vft/hft) 0.0086
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.01
Soil Type 3
Design Storm Frequency 100-yr
Fire Factor 0
LID False
Output Results
Modeled (100-yr) Rainfall Depth (in) 6.9003
Peak Intensity (in/hr) 3.1232
Undeveloped Runoff Coefficient (Cu) 0.463
Developed Runoff Coefficient (Cd) 0.4674
Time of Concentration (min) 9.0
Clear Peak Flow Rate (cfs) 3.5866
Burned Peak Flow Rate (cfs) 3.5866
24-Hr Clear Runoff Volume (ac-ft) 0.1901
24-Hr Clear Runoff Volume (cu-ft) 8281.9288

PROPOSED CONDITIONS CALCULATIONS
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 1, 25-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 1
Area (ac) 1.085
Flow Path Length (ft) 258.0
Flow Path Slope (vft/hft) 0.009
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 25-yr
Fire Factor 0
LID False
Output Results
Modeled (25-yr) Rainfall Depth (in) 5.3997
Peak Intensity (in/hr) 3.2216
Undeveloped Runoff Coefficient (Cu) 0.4734
Developed Runoff Coefficient (Cd) 0.8403
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 2.9371
Burned Peak Flow Rate (cfs) 2.9371
24-Hr Clear Runoff Volume (ac-ft) 0.383
24-Hr Clear Runoff Volume (cu-ft) 16683.1509
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 1, 50-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 1
Area (ac) 1.085
Flow Path Length (ft) 258.0
Flow Path Slope (vft/hft) 0.009
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 50-yr
Fire Factor 0
LID False
Output Results
Modeled (50-yr) Rainfall Depth (in) 6.15
Peak Intensity (in/hr) 3.6693
Undeveloped Runoff Coefficient (Cu) 0.515
Developed Runoff Coefficient (Cd) 0.8461
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 3.3684
Burned Peak Flow Rate (cfs) 3.3684
24-Hr Clear Runoff Volume (ac-ft) 0.4365
24-Hr Clear Runoff Volume (cu-ft) 19015.8376
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 1, 100-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 1
Area (ac) 1.085
Flow Path Length (ft) 258.0
Flow Path Slope (vft/hft) 0.009
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 100-yr
Fire Factor 0
LID False
Output Results
Modeled (100-yr) Rainfall Depth (in) 6.9003
Peak Intensity (in/hr) 4.1169
Undeveloped Runoff Coefficient (Cu) 0.5477
Developed Runoff Coefficient (Cd) 0.8507
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 3.7998
Burned Peak Flow Rate (cfs) 3.7998
24-Hr Clear Runoff Volume (ac-ft) 0.4902
24-Hr Clear Runoff Volume (cu-ft) 21351.6355
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 2, 25-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 2
Area (ac) 1.365
Flow Path Length (ft) 259.0
Flow Path Slope (vft/hft) 0.0097
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 25-yr
Fire Factor 0
LID False
Output Results
Modeled (25-yr) Rainfall Depth (in) 5.3997
Peak Intensity (in/hr) 3.2216
Undeveloped Runoff Coefficient (Cu) 0.4734
Developed Runoff Coefficient (Cd) 0.8403
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 3.6951
Burned Peak Flow Rate (cfs) 3.6951
24-Hr Clear Runoff Volume (ac-ft) 0.4818
24-Hr Clear Runoff Volume (cu-ft) 20988.4802
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 2, 50-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 2
Area (ac) 1.365
Flow Path Length (ft) 259.0
Flow Path Slope (vft/hft) 0.0097
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 50-yr
Fire Factor 0
LID False
Output Results
Modeled (50-yr) Rainfall Depth (in) 6.15
Peak Intensity (in/hr) 3.6693
Undeveloped Runoff Coefficient (Cu) 0.515
Developed Runoff Coefficient (Cd) 0.8461
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 4.2377
Burned Peak Flow Rate (cfs) 4.2377
24-Hr Clear Runoff Volume (ac-ft) 0.5492
24-Hr Clear Runoff Volume (cu-ft) 23923.1505
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary Hydrology/Appendix C - HydroCalc/20210330/CVEN-125 - DA 2, 100-yr.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125
Subarea ID DA 2
Area (ac) 1.365
Flow Path Length (ft) 259.0
Flow Path Slope (vft/hft) 0.0097
50-yr Rainfall Depth (in) 6.15
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 100-yr
Fire Factor 0
LID False
Output Results
Modeled (100-yr) Rainfall Depth (in) 6.9003
Peak Intensity (in/hr) 4.1169
Undeveloped Runoff Coefficient (Cu) 0.5477
Developed Runoff Coefficient (Cd) 0.8507
Time of Concentration (min) 5.0
Clear Peak Flow Rate (cfs) 4.7805
Burned Peak Flow Rate (cfs) 4.7805
24-Hr Clear Runoff Volume (ac-ft) 0.6167
24-Hr Clear Runoff Volume (cu-ft) 26861.735

APPENDIX D

EXISTING CONDITIONS HYDROLOGY MAP
0 SCALE: 1" = 30' 15 30 60

APPENDIX E

PROPOSED CONDITIONS HYDROLOGY MAP
0 EV

APPENDIX F

HYDRAULIC CALCULATIONS

APPENDIX G

DETENTION CALCULATIONS
930 W. Compton Boulevard
Compton, CA 90220
DA 1 Allowable Q = (1.1 cfs/acre)(1.085 acres)
Allowable Q = 1.194 cfs
Orifice Q = 1.149 cfs
Q‐25 Hydrograph ‐ DA 1
Time (min) Q (cfs) Area Under Curve
1147.2 1.13571056 0.228803724
1147.4 1.15232668 0.232207656
1147.6 1.16974988 0.235780088
1147.8 1.188051 0.239536127
1148 1.20731027 0.24349294
1148.2 1.22761912 0.247670144
1148.4 1.24908231 0.2520903
1148.6 1.27182068 0.256779531
1148.8 1.29597463 0.261768321
1149 1.32170858 0.267092551
1149.2 1.34921693 0.27279487
1149.4 1.37873177 0.278926538
1149.6 1.41053361 0.285549961
1149.8 1.444966 0.292742256
1150 1.48245656 0.300570885
1150.2 1.52325229 0.309133129
1150.4 1.568079 0.318612789
1150.6 1.61804889 0.329247891
1150.8 1.67443003 0.341348631
1151 1.73905629 0.355380713
1151.2 1.81475084 0.372102206
1151.4 1.90627121 0.392914857
1151.6 2.02287736 0.421119035
1151.8 2.18831299 0.481815679
1152 2.6298438 0.546287121
1152.2 2.83302741 0.572231801
1152.4 2.88929059 0.580784512
1152.6 2.91855452 0.585148703

1.149

1.349

1.549

1.749

1.949

2.149

2.349

2.549

2.749

2.949

3.149
Discharge, Q (cfs)
Time (min)
25-Year Storage Volume at Allowable Q - DA 1
City Ventures March 2021
930 W. Compton Boulevard
Compton, CA 90220
1152.8 2.9329325 0.587005727
1153 2.93712476 0.587063586
1153.2 2.93351109 0.585697327
1153.4 2.92346218 0.583128361
1153.6 2.90782143 0.579494061
1153.8 2.88711918 0.57487988
1154 2.86167962 0.5693357
1154.2 2.83167739 0.562884499
1154.4 2.7971676 0.555526706
1154.6 2.75809947 0.547241769
1154.8 2.71431822 0.53798746
1155 2.66555638 0.527696926
1155.2 2.61141288 0.516272851
1155.4 2.55131563 0.503577329
1155.6 2.48445766 0.489414457
1155.8 2.40968691 0.47349931
1156 2.32530619 0.455357898
1156.2 2.22827279 0.434121881
1156.4 2.11294602 0.408500958
1156.6 1.97206357 0.375540707
1156.8 1.7833435 0.310819513
1157 1.32485163 0.242767733
1157.2 1.10282571 0.220565142

20.73031274
Volume 1243.8
City Ventures March 2021
930 W. Compton Boulevard
Compton, CA 90220
DA 2 Allowable Q = (1.1 cfs/acre)(1.365 acres)
Allowable Q = 1.501 cfs
Orifice Q = 1.435 cfs
Q‐25 Hydrograph ‐ DA 1
Time (min) Q (cfs) Area Under Curve
1147.2 1.42879715 0.287849846
1147.4 1.44970131 0.292132213
1147.6 1.47162082 0.296626563
1147.8 1.49464481 0.301351902
1148 1.51887421 0.306329827
1148.2 1.54442406 0.311585019
1148.4 1.57142614 0.317145861
1148.6 1.60003247 0.323045216
1148.8 1.63041969 0.329321436
1149 1.66279467 0.336019661
1149.2 1.69740194 0.343193546
1149.4 1.73453352 0.35090758
1149.6 1.77454228 0.359240273
1149.8 1.81786045 0.368288644
1150 1.86502599 0.378137564
1150.2 1.91634966 0.388909421
1150.4 1.97274455 0.400835444
1150.6 2.03560989 0.414215089
1150.8 2.106541 0.429438601
1151 2.18784501 0.447091865
1151.2 2.28307364 0.468128581
1151.4 2.39821217 0.49431224
1151.6 2.54491023 0.529794915
1151.8 2.75303893 0.606155209
1152 3.30851317 0.687264443
1152.2 3.56413126 0.719904524
1152.4 3.63491397 0.730664386
1152.6 3.67172989 0.73615482

1.149

1.349

1.549

1.749

1.949

2.149

2.349

2.549

2.749

2.949

3.149

3.349

3.549

3.749

3.949
Discharge, Q (cfs)
Time (min)
25-Year Storage Volume at Allowable Q - DA 1
City Ventures March 2021
930 W. Compton Boulevard
Compton, CA 90220
1152.8 3.68981831 0.738491076
1153 3.69509245 0.738563866
1153.2 3.69054621 0.736845025
1153.4 3.67790403 0.733613099
1153.6 3.65822696 0.729040915
1153.8 3.6321822 0.723235978
1154 3.60017758 0.716261042
1154.2 3.56243284 0.708145014
1154.4 3.5190173 0.698888437
1154.6 3.46986707 0.688465451
1154.8 3.41478744 0.676822934
1155 3.3534419 0.663876777
1155.2 3.28532588 0.649504554
1155.4 3.20971966 0.633532768
1155.6 3.12560802 0.615714962
1155.8 3.0315416 0.595692681
1156 2.92538521 0.572869614
1156.2 2.80331093 0.546153334
1156.4 2.65822241 0.51392056
1156.6 2.4809832 0.472454438
1156.8 2.24356118 0.391031
1157 1.66674882 0.305417471
1157.2 1.38742589 0.277485178

26.08007086
Volume 1564.8
City Ventures March 2021

APPENDIX H

LACDPW ALLOWABLE Q

SEWER AREA STUDY
TTM No. 82807
CIP #10-18/JN120S
SMD Index 1757, 1812
Prepared for:

City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
Contact: Kim Prijatel
(949) 258-7555
Property:

TTM No. 82807
APN 6161-001-902
930 West Compton Boulevard
City of Compton, CA 90220
Prepared by:

C&V Consulting, Inc.
9830 Irvine Center Drive
Irvine, CA 92618
(949) 916-3800
Contact: David Terry, Project Manager
Ryan J. Bittner R.C.E. 68167
October 2019
Revised: April 2021
Table of Contents

SECTION PAGE
INTRODUCTION 1
SITE DESCRIPTION 1
PROJECT DESCRIPTION 2
METHODOLOGY 2
SEWER PIPE CAPACITY ANALYSIS 4
CONCLUSION 5
Appendices
A. SEWER AREA STUDY EXHIBIT
B. SEWER AREA STUDY TABLE & DEPTH OF FLOW CALCULATIONS
C. SEWER AS-BUILTS, SEWER MAINTENANCE DIVISION INDEX MAPS, SEWER ATLAS MAP D. TENTATIVE TRACT MAP (PROJECT SITE)
E. COUNTY OF LOS ANGELES DEPARTMENT OF PUBLIC WORKS, SEWER AREA STUDY DESIGN

GUIDELINES
F. LOS ANGELES COUNTY SANITATION DISTRICT – WILL SERVE LETTER G. CITY OF COMPTON ZONING MAP
Sewer Area Study
Compton, TTM No. 82807
1 INTRODUCTION
The following Area Study has been prepared by C&V Consulting, Inc. to determine and show:

A. The capacity of the existing sewer segments from proposed development site to the Los Angeles County Sanitation District (LACSD) maintained trunk sewers.

B. The existing sewer facility will adequately service the proposed development.

This analysis will include any and all tributary flow to the sewer system from the proposed development to the LACSD trunk line downstream of the proposed development. All tributary area within this area study has been developed.

SITE DESCRIPTION
The project is located at 930 West Compton Boulevard, in the City of Compton, California. The site is bounded by West Compton Boulevard to the north, West 151st Street and existing single-family residential to the south, South Kemp Avenue and existing single-family residential to the east, and Dwight Avenue and a liquor store to the west. The project site is currently vacant with no visible traces of impervious coverage. Thus, pervious coverage is assumed to be 100% for the existing condition of the site.

Sewer Area Study
Compton, TTM No. 82807
2 PROJECT DESCRIPTION
The project proposes the construction of eight condominium buildings of sixty (60) attached units with private garages, private drive aisles, hardscape, associated landscaping, and guest parking areas. The private drive aisle provides access to the residences via two driveway entrances/exits along West 151st Street. Drive aisles and parking areas will be composed of asphalt concrete pavement, and landscaping will be incorporated in open space areas. The proposed project is located within the jurisdictional boundaries of Los Angeles County Sanitation District No. 1. The proposed sewer system will be gravity fed and flow will be towards a local sewer line located along West Compton Boulevard, which conveys and connects to the Districts’ Joint Outfall G Unit 5 Trunk Sewer.

AP Number Size (ac)
6161-001-902 2.75

METHODOLOGY
This study will investigate the sewerage discharge route along West Compton Boulevard from the proposed development (TTM No. 82807) to the Districts’ Joint Outfall G Unit 5 Trunk Sewer. The route is on a local sewer line, which is not maintained by the Sanitation Districts of Los Angeles County, connects to the Districts’ Joint Outfall G Unit 5 Trunk Sewer for conveyance, located along the west side of Compton Creek at Compton Boulevard. The Districts’ 31.3-inch diameter lined trunk sewer has a capacity of 7.9 million gallons per day (mgd) and conveyed a peak flow of 5.8 mgd when last measured in 2013. The subject route of the sewer main will be analyzed by segments based on sewer pipe size, slope, and tributary area.

Reach #1A segment is along West Compton Boulevard to Kemp Avenue, from the connection of the project site Manhole 2 to Manhole 3 and consisting of an existing 12” VCP sewer main with a slope of

0.72%. This segment includes the project site (Area #1A) and the upstream tributary areas of Reach #1.

Reach #2A segment is along West Compton Boulevard from Kemp Avenue to North Wilmington Avenue, Manhole 3 to Manhole 4 and consists of an existing 12” VCP sewer main with a slope of 0.92%. This segment includes Area #2 and the upstream tributary areas of Reach #1A.

Sewer Area Study
Compton, TTM No. 82807
3 Reach #2B segment is along West Compton Boulevard from Kemp Avenue to North Wilmington Avenue, Manhole 4 to Manhole 5 and consists of an existing 12” VCP sewer main with a slope of 0.92%. This segment includes tributary areas of Reach #2A.

Reach #3A segment is on the cross-section of West Compton Boulevard and North Wilmington Avenue, Manhole 5 to Manhole 6 and consists of an existing 12” VCP sewer main with a slope of 0.92%. This segment includes Area #3 and the upstream tributary areas of Reach #2B.

Reach #4A segment is along West Compton Boulevard from Manhole 6 to Manhole 7 and consists of an existing 15” VCP sewer main with a slope of 0.33%. This segment has a lateral connection to a sewer system to the North which also connects to CSD Manhole (G61). This lateral connection is plugged and abandoned as shown on Reference Sheet C-7. This indicates that the flow in the north sewer line conveys into the project sewer line in this study; therefore, the segment includes the upstream Area #4 and the upstream tributary areas of Reach #3A.

Reach #4B segment is along West Compton Boulevard from Manhole 7 to Manhole 8 and consists of an existing 15” VCP sewer main with a slope of 0.33%. This segment includes the upstream tributary areas of Reach #4A.

Reach #5 segment is along West Compton Boulevard to Coral Street and connects to the 31.3” Sewer Trunk Line belonging to Sanitation District No. 1 from Manhole 8 to CSD Manhole (G61) consisting of a 15” VCP sewer main with a slope of 0.33%. This Reach#5 segment includes Area #5 and the tributary area of Reach 4B.

Sewer Area Study
Compton, TTM No. 82807
4 SEWER PIPE CAPACITY ANALYSIS
The existing sewer pipes were analyzed per County Standard S-C4 for a maximum design depth at half full for pipes less than 15” and three fourths full for pipes 15” and greater. Data were obtained from corresponding Sewer As-Built plans and Compton sewer atlas map in Appendix C for the analysis.

In order to calculate the pipe capacity, Kutter’s formula was utilized assuming a depth of three-fourths full and a Manning’s friction factor, n, of 0.013. Kutter’s formula is shown below:

𝑄 = 𝐴𝑐√𝑅𝑆
Where A = Flow area (sf)
R = Hydraulic Radius (ft)
S = Pipe slope (ft/ft)
𝑐 =

41.685+

0.00281
𝑆
+

1.811
𝑛
1+
(41.65+

0.00281
𝑠
)𝑛
√𝑅
Detailed results for each segment have been tabulated in Appendix B. Details of calculations for each reach of pipe has been included in Appendix B following the table.

The tributary sewer flow rate (Q) for the studied sewer lines are analyzed based on County standards as follows:

For Tributary Areas:

Q = Z*A
A = Tributary Area (Acre)
Z = Zoning Coefficients (Refer to the LACDPW guideline information within Appendix E) For the Project Site
Q = (0.001 cfs/unit) x (60 units) = 0.060 cfs
(0.001 cfs/unit for proposed condominiums per County standard zoning coefficient within Appendix E)
The tributary areas were calculated by reference scaling the County of Los Angeles Sewer Maintenance Division’s Atlas Index Maps and referencing County of Los Angeles Assessor’s map. The zoning coefficients were referencing the LACDPW guidelines and the Zoning Map provided by the City of Compton in Appendix G. City of Compton’s classification of Low-Density Residential matches the density description Sewer Area Study
Compton, TTM No. 82807
5 of Los Angeles County Zone R-2, so the zoning coefficient of R-2 is used for Compton’s zoning area of LowDensity Residential. Medium-Density Residential applies County R-3 coefficient value and High-Density Residential applies County R-4 coefficient value. These values match the capacity/density represent a more conservative scenario.

Per County requirements, we separately calculated the sewer discharge for schools based on the “Estimated Average Daily Sewage Flows for Various Occupancies” with a peaking factor of 2.5. Churches were taken into consideration of separate calculation, but the discharge calculated was insignificant compared to the zoning coefficient; therefore, the calculation for churches was analyzed by tributary area and corresponding zone. Unit counts were used to determine the flows on condominium sites where its unit density is greater than the tributary area and corresponding zone. The County Sewer Area Study guidelines indicate a zoning coefficient for R-1 Residential as 0.004 cfs/acre which allow up to 4 dwelling units per acre and matches the actual worse case density; For condominium, County recommends applying coefficient of 0.001 cfs/unit.

CONCLUSION
The existing sewer system being analyzed in this area study has a design capacity above the calculated cumulative flow. The peak discharge at the downstream end of the sewer system 15” pipe entering the County Sanitation District No. 1 existing 31.3” sewer trunk main is calculated to be a rate of 1.8465 cfs with a flow depth of 7.61 inches. Refer to Appendix B for calculations and tabulated results. Therefore, we conclude that the existing sewer system has adequate capacity for the proposed development.

Sewer Area Study
Compton, TTM No. 82807
Appendix A
SEWER AREA STUDY EXHIBIT

Sewer Area Study
Compton, TTM No. 82807
Appendix B
SEWER AREA STUDY TABLE &
DEPTH OF FLOW CALCULATIONS

TR 82807
930 West Compton Boulevard, Compton
MH # MH # Size (in.) Slope (%) 1/2 Full (<15") 3/4 Full (>15") Flow Depth Cumulative Flow/ Capacity 1 2 12 0.72 1.444 1 70.52 Low Density Residential 0.0080 0.56416 1 17.58 Limited Commercial 0.0150 0.26371 Laurel Street Elementary School (7.92 AC) 0.02503 1 Tibby Elementary (8.12 AC) 0.02143 0.8743 4.58 CIP #10-18 /JN120S Compton 76% 61% 2 3 12 0.72 1.444 1A 2.75 0.06000 0.9343 4.74 CIP #10-18 /JN120S Project Site Compton 60 Units 79% 65% 3 4 12 0.92 1.633 2 4.05 Medium Density Residential 0.0120 0.04860 Condominium Tract No. 51441
(1.05 AC) 0.03700 1.0199 4.65 CIP #10-18 /JN120S Compton 78% 62% 4 5 12 0.92 1.633 2 - - 1.0199 4.65 CIP #10-18 /JN120S Compton 78% 62% 5 6 15 0.33 3.333 3 Condominium Tract No. 37774 (1.34 AC) 0.03200 3 Condominium Tract No. 34166 (2.49 AC) 0.05300

52.64 Low Density Residential 0.0080 0.42112

0.49 High Density Residential 0.0160 0.007844.00 Limited Commercial 0.0150 0.06000 1.5939 5.92 CIP #10-18 /JN120S Compton 53% 48% 6 7 15 0.33 3.333 4 0.79 Low Density Residential 0.0080 0.00630

13.07 Medium Density Residential 0.0120 0.15686

0.23 Parking/Medium Residential 0.0120 0.002743.54 Limited Commercial 0.0150 0.05315 1.8129 7.53 CIP #10-18 /JN120S Compton 67% 54% Sewer Area Study Table
Street Name
Segment Pipe *Capacity (cfs) Calculated
Flow (cfs)
**Cumulative
Calculated
Flow (cfs)
****Cumulative
Depth (in) Tributary Area (Acres) Zone Zoning Coefficient Tributary Area # PC Construction Plan # Proposed Condominium
Coefficient 0.001 cfs/DU
Reach #3A
W. Compton Blvd.
(647 Students)(10 gal/student/day)
(2.5 peak factor)/ 646190.4 = 0.0250
(554 Students)(10 gal/student/day)
(2.5 peak factor)/ 646190.4 = 0.0214
Reach #1
Upstream
Tributary Area W. Compton Blvd.
(53 Units)(0.001cfs/DU)=0.053(32 Units)(0.001cfs/DU)=0.032(37 Units)(0.001cfs/DU)=0.037 Reach #1A
W. Compton Blvd.
*** Percentage Full
Comments
Reach #2A
W. Compton Blvd.

Reach #2B
W. Compton Blvd.

Reach #4A
W. Compton Blvd.
-
4/16/2021CVC Job No CVEN-125 1
7 8 15 0.33 3.333 4 - - 1.8129 7.53 CIP #10-18 /JN120S Compton 67% 54% 8 G Unit 5 15 0.33 3.333 5 2.24 Limited Commercial 0.0150 0.03360 1.8465 7.61 CIP #10-18 /JN120S LACSD Connection 68% 55% * Calculated using the Kutter's Equation with n=0.013 and assuming 1/2 full (<15") and 3/4 full (>15")** Based on current land use and coefficients per LA County, (Attach supporting calculations)***Flow depth should be divided by 0.75 times the pipe diameter for pipes > 15" and 0.5 times the pipe diameter for pipes < 15"****Calculations for pipe flow, and flow depth shown on following sheets Reach #5
W. Compton Blvd.

Reach #4B
W. Compton Blvd.
-
4/16/2021CVC Job No CVEN-125 2
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow (50% full) 0.500 ft
Slope 0.0072 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.142 radians
Flow Area 0.393 sf
Wetted Perimeter 1.571 ft
Hydraulic Radius 0.250 ft
Pipe Capacity 1.444 cfs
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow 0.38 ft
Depth of Flow 4.58 in
Slope, S 0.0072 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.621 radians
Flow Area, A 0.275 sf
Wetted Perimeter 1.331 ft
Hydraulic Radius, R 0.207 ft
Cumulative Flow, Q 0.874 cfs
Kutter's Formula
Reach 1 Cumulative Depth of Flow
"What-If Analysis"
Reach 1 Pipe Capacity
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow (50% full) 0.500 ft
Slope 0.0072 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.142 radians
Flow Area 0.393 sf
Wetted Perimeter 1.571 ft
Hydraulic Radius 0.250 ft
Pipe Capacity 1.444 cfs
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow 0.39 ft
Depth of Flow 4.74 in
Slope, S 0.0072 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.566 radians
Flow Area, A 0.288 sf
Wetted Perimeter 1.359 ft
Hydraulic Radius, R 0.212 ft
Cumulative Flow, Q 0.934 cfs
Kutter's Formula
Reach 1A Cumulative Depth of Flow
"What-If Analysis"
Reach 1A Pipe Capacity
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow (50% full) 0.500 ft
Slope 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.142 radians
Flow Area 0.393 sf
Wetted Perimeter 1.571 ft
Hydraulic Radius 0.250 ft
Pipe Capacity 1.633 cfs
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow 0.39 ft
Depth of Flow 4.65 in
Slope, S 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.595 radians
Flow Area, A 0.281 sf
Wetted Perimeter 1.344 ft
Hydraulic Radius, R 0.209 ft
Cumulative Flow, Q 1.020 cfs
Kutter's Formula
Reach 2A Cumulative Depth of Flow
"What-If Analysis"
Reach 2A Pipe Capacity
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow (50% full) 0.500 ft
Slope 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.142 radians
Flow Area 0.393 sf
Wetted Perimeter 1.571 ft
Hydraulic Radius 0.250 ft
Pipe Capacity 1.633 cfs
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow 0.39 ft
Depth of Flow 4.65 in
Slope, S 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.595 radians
Flow Area, A 0.281 sf
Wetted Perimeter 1.344 ft
Hydraulic Radius, R 0.209 ft
Cumulative Flow, Q 1.020 cfs
Kutter's Formula
Reach 2B Pipe Capacity
Reach 2A Cumulative Depth of Flow
"What-If Analysis"
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow (50% full) 0.500 ft
Slope 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.142 radians
Flow Area 0.393 sf
Wetted Perimeter 1.571 ft
Hydraulic Radius 0.250 ft
Pipe Capacity 1.633 cfs
Pipe Diameter 12 in
Pipe Diameter 1.000 ft
Depth of Flow 0.49 ft
Depth of Flow 5.92 in
Slope, S 0.0092 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.169 radians
Flow Area, A 0.386 sf
Wetted Perimeter 1.557 ft
Hydraulic Radius, R 0.248 ft
Cumulative Flow, Q 1.594 cfs
Kutter's Formula
Reach 3A Cumulative Depth of Flow
"What-If Analysis"
Reach 3A Pipe Capacity
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow (75% full) 0.938 ft
Slope 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 2.094 radians
Flow Area 0.987 sf
Wetted Perimeter 2.618 ft
Hydraulic Radius 0.377 ft
Pipe Capacity 3.333 cfs
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow 0.63 ft
Depth of Flow 7.53 in
Slope, S 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.134 radians
Flow Area, A 0.616 sf
Wetted Perimeter 1.968 ft
Hydraulic Radius, R 0.313 ft
Cumulative Flow, Q 1.813 cfs
Kutter's Formula
Reach 4 Cumulative Depth of Flow
"What-If Analysis"
Reach 4A Pipe Capacity
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow (75% full) 0.938 ft
Slope 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 2.094 radians
Flow Area 0.987 sf
Wetted Perimeter 2.618 ft
Hydraulic Radius 0.377 ft
Pipe Capacity 3.333 cfs
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow 0.63 ft
Depth of Flow 7.53 in
Slope, S 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.134 radians
Flow Area, A 0.616 sf
Wetted Perimeter 1.968 ft
Hydraulic Radius, R 0.313 ft
Cumulative Flow, Q 1.813 cfs
Kutter's Formula
Reach 4B Pipe Capacity
Reach 4 Cumulative Depth of Flow
"What-If Analysis"
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow (75% fu 0.938 ft
Slope 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 2.094 radians
Flow Area 0.987 sf
Wetted Perimeter 2.618 ft
Hydraulic Radius 0.377 ft
Pipe Capacity 3.333 cfs
Pipe Diameter 15 in
Pipe Diameter 1.250 ft
Depth of Flow 0.63 ft
Depth of Flow 7.61 in
Slope, S 0.0033 ft/ft
Manning's n 0.013 (unitless)
Central Angle 3.113 radians
Flow Area, A 0.625 sf
Wetted Perimeter 1.981 ft
Hydraulic Radius, R 0.315 ft
Cumulative Flow, Q 1.847 cfs
Reach 5 Pipe Capacity
Kutter's Formula
"What-If Analysis"
Reach 5 Cumulative Depth of Flow

9/6/2019 church - Google Maps
https://www.google.com/maps/search/church/@33.8947842,-118.2428635,17z 1/1 Map data ©2019 200 ft
church
(Not a signicant source for sewerage)
Sewer Area Study
Compton, TTM No. 82807
Appendix C
SEWER AS‐BUILTS & SEWER
MAINTENANCE DIVISION INDEX MAPS

Sewer Area Study
Compton, TTM No. 82807
Appendix D
TENTATIVE TRACT MAP
(PROJECT SITE)

CITY OF COMPTON
TENTATIVE TRACT MAP No. 82807

FOR CONDOMINIUM PURPOSES
"CONCORD"
0 17
EV

CITY OF COMPTON

CONCEPTUAL SITE PLAN
0 EV

CITY OF COMPTON

STREET SECTIONS

CITY OF COMPTON

CONCEPTUAL GRADING PLAN
0 EV

CITY OF COMPTON

CONCEPTUAL UTILITY PLAN
0 EV
Sewer Area Study
Compton, TTM No. 82807
Appendix E
LACDPW SEWER AREA STUDY GUIDELINES,
SEWER ATLAS MAP

Sewer Area Study
Compton, TTM No. 82807
Appendix F
LOS ANGELES COUNTY SANITATION
DISTRICT – WILL SERVE LETTER

Sewer Area Study
Compton, TTM No. 82807
Appendix G
CITY OF COMPTON ZONING MAP

ALONDRA

ARTESIA

CENTRAL

ROSECRANS

COMPTON

SANTA FE

ALAMEDA
ELM

WILMINGTON
BULLIS
LIME
MONA

VICTORIA
WALNUT
156TH

CALDWELL
ACACIA

LONG BEACH
HARRIS
AVALON
PINE
SPT CO
PALM

EL SEGUNDO
SLOAN
GIBSON

METRO BLUE LINE/SPT CO
CARLIN
BURRIS

CHESTER
OAKS
154TH
EUCLID
68TH
PANNES

OLEANDER

MANVILLE
ESSEY
HOLLY

POINSETTIA
135TH
CAROB
ORIS
PLUM
CENTER
126TH

MCKINLEY
KAY
151ST
SCHOOL

COOKACRE
ROSE
BLISS
PIRU
124TH

PARMELEE
KEMP
138TH
69TH

ATLANTIC
MAYO
131ST
TUCKER
WARD

WILLIAMS
GALE
SPRUCE
137TH
CHERRY
CLARK
APRA
132ND
130TH
ORANGE
PALMER
CLAUDE
PEARL
139TH CRESSEY

HASKINS
POPLAR
SUSANA
136TH
CLOVIS

ORCHARD

TAMARIND
CRANE
PECK
ELVA
LARGO
142ND

RAYMOND
NORD

BENNETT
DELTA
OLANDA

LINSLEY
MURIEL
SPRING
134TH
123RD
LAUREL

GARDENA

SOMERSET
REEVE

SANDHILL
WILLOW
DWIGHT
CARESS

SAN LUIS
ANZAC
150TH

HARCOURT
VESTA
149TH
148TH
LOCUST

ALBERTONI
GRAPE
BORT
119TH
HARBOR
MOTZ
WEBER

BANNING
PEACH

SAN JOSE

HUNSAKER
120TH
BURTON
TAPER

PAULINE
ANITA
INDIGO
KILLEN

VAN NESS
WRIGHT

TICHENOR
CUZCO
RAHN

VISALIA
72ND
TEMPLE
KONA

LAVINIA

ELIZABETH
CULVER
LUCIEN
155TH

WILLOWBROOK

STANFORD
LOUISE
EXMOOR
169TH
CLYMAR
SHORT
CAIRN
DIXON

ARBUTUS

HATCHWAY

EL CAMINO
PEAR
KEENE
OAK
STATE

GREENLEAF NORTHWOOD
CARO

GUNLOCK
122ND

TARRANT
ELIZA
GOLDEN
PIXLEY
ALPINE
CAHITA
WHITE

CASWELL
KNOPF
SLATER
AGNES
DIANE

APRILIA

MCMILLAN

WALDORF

MCDIVITT
IVA
125TH
163RD
71ST
CEDAR
133RD
SHAUER
165TH
166TH
AUTO

ANDERSON
153RD
152ND
BOWEN
COCOA
127TH

WHITEMARSH
MYRRH
BUTLER
SCOTT
MAHALO
DERN
ORCUTT
129TH
KEEGAN
ADAMS
145TH
1ST

BELHAVEN
TARTAR

CORLETT

SALINAS
SHERER
MONDO

GLENCOE

ALHAMBRA

FRAILEY
67TH
FORHAN

JOHNSON
ALMOND
HARLAN
MARGAY

WAYSIDE

SAN VINCENTE

STOCKTON

STANLEY
REYES
HEATH
GUNDRY
121ST

LAS HERMANAS
EVERS

SPORTSMAN
LONESS

PETROLIA
MEALY

THORSON

TAJAUTA

BILLINGS
BAHAMA
RIDDLE
MAPLE

BRADFIELD

COACHELLA

BARCLAY

MAGNOLIA
TRAUB

LANTANA

ALFONSO

EZMIRLIAN

PELLEUR
POPPY

PACIFIC

REDONDO BEACH

AMANTHA
NEVADA

ORLEANS

ANSMITH
144TH

MANETTE
MAIE

STONEACRE

TRAFFORT

MARCELLE
OLIVE

RAYBORN
159TH

CATALINA

INDUSTRY

DELCOMBRE
NESTOR
TAYLOR
NILAND

BITTERLAKE

CASTLEGATE

BEECHLEY

MAGDELENA
BRAZIL
PLAZA
ZAMORA

ARLINGTON

CORNISH

PENROSE

KALSMAN
ALVADA
ESTHER

CALIFORNIA

GRANDEE

MATTHISEN

VIRGINIA

WASHINGTON

CLIVEDEN
TOWNE

CORYDON

AIRLINE
ALVARO

SAN MARCUS

QUEENSDALE
JUNE

BRAYTON

ELEANOR

HILLFORD

SAN ANTONIO
DUMA
HALO
WINONA
WILSON

GERTRUDE

HICKORY
158TH

STOCKWELL
157TH
GRAHAM

CORREGIDOR
BALES

DOUGLAS

ALBERTSON
ARANBE
ADANA

DEL MAR
JANIS
70TH

BROADACRES

PLEASANT

PALMERSTONE
NEECE

BLAKLEY

WADSWORTH
CORAL
LENNON
140TH
ISHIDA
EDISON

CYPRESS

JOSEPHINE
FUEGO

PAULSEN
DARLAN

BENTLEY
WATER

HOMESTEAD

SAN JUAN

MARK KEPPEL

MILLMARK
NORDBY

SAN RAFAEL

SAN CARLOS

CHARLES WILLARD

SAN PEDRO

SAN MIGUEL

HARWICK

SAUNDERS

MARKTON

DALHART
HOLMES

BELFOREST

WALNUT PARK

ADDINGTON

BANDERA
FLOWER
ACOMA
BARRON
SIERRA

MARGUERITA

DEFIANCE

MAGNOLIA

EL SEGUNDO
132ND
DWIGHT

VISALIA
153RD

LAVINIA

OLEANDER
SCHOOL

THORSON
GALE
151ST

MARCELLE
KEENE

STOCKWELL
ACACIA
153RD

EZMIRLIAN
ELM

HILLFORD
HARRIS
BOWEN

WILLOWBROOK
125TH
CARLIN
138TH
ORIS
ROSE
138TH

TICHENOR

BENNETT

WILLOWBROOK
KEMP

JOHNSON
PEARL
139TH MCMILLAN NESTOR
129TH
130TH
AUTO

CORLETT

STOCKTON
127TH

BENNETT

TAJAUTA

CHESTER
BURRIS
CEDAR
SPT CO
126TH
NESTOR
IVA
WARD
COCOA

WILMINGTON
124TH

PAULSEN
NILAND
REEVE
TUCKER

CLIVEDEN

WADSWORTH
129TH
131ST
MAIE
HARRIS

JOHNSON
138TH
HEATH
123RD

COMPTON
135TH
137TH
LAUREL
AUTO
LIME
CEDAR

CASTLEGATE

CHESTER

POINSETTIA
KEENE
LAUREL
KEMP

STANFORD
SPT CO
127TH
BUTLER
ROSE
BUTLER

RAYMOND
DWIGHT
PALM
70TH

TICHENOR
AUTO
125TH

RAYMOND
KAY
BUTLER
122ND
127TH
69TH
134TH
BARRON

SAUNDERS
133RD

BANDERA
CLYMAR
MYRRH

GRANDEE

GARDENA

NORTHWOOD
BRAZIL

COMPTON

WILLOWBROOK
EVERS
OAK

COMPTON

GRANDEE
AVALON

HILLFORD
132ND
139TH
KEMP
MURIEL
MYRRH
GRAPE

ARBUTUS
PEARL
132ND
SCHOOL
132ND

SAN LUIS
SPRING
ARANBE

HILLFORD
KEENE
136TH
LOUISE
PIRU
133RD
PIXLEY

LONG BEACH

MAGNOLIA

QUEENSDALE
134TH
PALMER
122ND
137TH
WHITE
PALMER
KEMP

THORSON
131ST

BRADFIELD

STONEACRE
PIRU

SAN LUIS
CRANE
67TH
MYRRH

ARBUTUS

MARCELLE

BENNETT
BUTLER
127TH
WILLOW

MCKINLEY
152ND
INDIGO

SAN MARCUS

ALAMEDA
HARRIS

ARTESIA

FRAILEY
NESTOR
MURIEL
LAUREL
LOCUST
130TH
MAYO
PINE
BALES
BAHAMA
WILLOW
122ND
LOCUST

ROSECRANS
PLAZA
124TH

CRESSEY
SLOAN
ROSE
MAPLE

CENTRAL
ELVA
126TH
131ST
MURIEL
123RD
68TH
WHITE

CENTRAL
122ND

CENTRAL
ROSE
SLATER
126TH
PALM

CORLETT
154TH
PALMER

VICTORIA
WHITE

POPLAR TAMARIND
SPT CO
134TH
SPT CO

LONG BEACH

CLIVEDEN

CALDWELL
POPLAR
KEENE
SPRUCE
MYRRH
131ST

CALDWELL
PALMER

CYPRESS
163RD
BRAZIL
137TH

WASHINGTON

TICHENOR CASWELL
136TH
POPLAR
137TH

NORTHWOOD
HARRIS
127TH PEACH

GARDENA

BENNETT
SLATER

BENNETT

KALSMAN

THORSON
ACACIA

THORSON
PALMER

THORSON

CORLETT

WILLIAMS

BROADACRES
70TH

APRILIA

CYPRESS
ACACIA
City of Compton
THIS MAP IS A PUBLIC RESOURCE OF GENERAL INFORMATION. THE CITY OF COMPTON MAKES

NO WARRANTY, REPRESENTATION OR GUARANTY AS TO THE CONTENT, SEQUENCE, ACCURACY, TIMELINESS OR COMPLETENESS OF ANY OF THE DATABASE INFORMATION PROVIDED HEREIN.

THE READER SHOULD NOT RELY ON THE DATA PROVIDED HEREIN FOR ANY REASON. THE CITY OF

COMPTON EXPLICITLY DISCLAIMS ANY REPRESENTATIONS AND WARRANTIES, INCLUDING,

WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE CITY OF COMPTON SHALL ASSUME NO LIABILITY FOR:

1. ANY ERRORS, OMISSIONS, OR INACCURACIES IN THE INFORMATION PROVIDED REGARDLESS OF HOW CAUSED; OR

2. ANY DECISION MADE OR ACTION TAKEN OR NOT TAKEN BY READER IN RELIANCE UPON ANY INFORMATION OR DATA FURNISHED HEREUNDER.

Zoning Map
Legend
City Limits
RA - Residential Agriculture
RL - Low Density Residential
RM - Medium Density Residential
RH - High Density Residential
P - Parking
PRL - Parking/Low Density Residential
PRM - Parking/Medium Density Residential
PRH - Parking/High Density Residential
CL - Limited Commercial
CM - Commercial Manufacturing
ML - Limited Manufacturing
MH - Heavy Manufacturing
B - Buffer
LAC - Los Angeles County

UNZONED
creek
streetsphere

SEWER AREA STUDY
TTM No. 82807
CIP #10-18/JN120S
SMD Index 1757, 1812
Prepared for:

City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
Contact: Kim Prijatel
(949) 258-7555
Property:

TTM No. 82807
APN 6161-001-902
930 West Compton Boulevard
City of Compton, CA 90220
Prepared by:

C&V Consulting, Inc.
9830 Irvine Center Drive
Irvine, CA 92618
(949) 916-3800
Contact: David Terry, Project Manager
Ryan J. Bittner R.C.E. 68167
October 2019
Revised: April 2021
Table of Contents

A. The capacity of the existing sewer segments from proposed development site to the Los Angeles County Sanitation District (LACSD) maintained trunk sewers.

B. The existing sewer facility will adequately service the proposed development.

AP Number Size (ac)
6161-001-902 2.75

Reach #1A segment is along West Compton Boulevard to Kemp Avenue, from the connection of the project site Manhole 2 to Manhole 3 and consisting of an existing 12” VCP sewer main with a slope of

0.72%. This segment includes the project site (Area #1A) and the upstream tributary areas of Reach #1.

In order to calculate the pipe capacity, Kutter’s formula was utilized assuming a depth of three-fourths full and a Manning’s friction factor, n, of 0.013. Kutter’s formula is shown below:

𝑄 = 𝐴𝑐√𝑅𝑆
Where A = Flow area (sf)
R = Hydraulic Radius (ft)
S = Pipe slope (ft/ft)
𝑐 =

41.685+

0.00281
𝑆
+

1.811
𝑛
1+
(41.65+

0.00281
𝑠
)𝑛
√𝑅
Detailed results for each segment have been tabulated in Appendix B. Details of calculations for each reach of pipe has been included in Appendix B following the table.

The tributary sewer flow rate (Q) for the studied sewer lines are analyzed based on County standards as follows:

For Tributary Areas:

Sewer Area Study
Compton, TTM No. 82807
Appendix A
SEWER AREA STUDY EXHIBIT

Sewer Area Study
Compton, TTM No. 82807
Appendix B
SEWER AREA STUDY TABLE &
DEPTH OF FLOW CALCULATIONS

52.64 Low Density Residential 0.0080 0.42112

0.49 High Density Residential 0.0160 0.007844.00 Limited Commercial 0.0150 0.06000 1.5939 5.92 CIP #10-18 /JN120S Compton 53% 48% 6 7 15 0.33 3.333 4 0.79 Low Density Residential 0.0080 0.00630

13.07 Medium Density Residential 0.0120 0.15686

Reach #2B
W. Compton Blvd.

Sewer Area Study
Compton, TTM No. 82807
Appendix D
TENTATIVE TRACT MAP
(PROJECT SITE)

CITY OF COMPTON
TENTATIVE TRACT MAP No. 82807

FOR CONDOMINIUM PURPOSES
"CONCORD"
0 17
EV

CITY OF COMPTON

CONCEPTUAL SITE PLAN
0 EV

CITY OF COMPTON

STREET SECTIONS

CITY OF COMPTON

CONCEPTUAL GRADING PLAN
0 EV

CITY OF COMPTON

CONCEPTUAL UTILITY PLAN
0 EV
Sewer Area Study
Compton, TTM No. 82807
Appendix E
LACDPW SEWER AREA STUDY GUIDELINES,
SEWER ATLAS MAP

Sewer Area Study
Compton, TTM No. 82807
Appendix F
LOS ANGELES COUNTY SANITATION
DISTRICT – WILL SERVE LETTER

Sewer Area Study
Compton, TTM No. 82807
Appendix G
CITY OF COMPTON ZONING MAP

ALONDRA

ARTESIA

CENTRAL

ROSECRANS

COMPTON

SANTA FE

ALAMEDA
ELM

WILMINGTON
BULLIS
LIME
MONA

VICTORIA
WALNUT
156TH

CALDWELL
ACACIA

LONG BEACH
HARRIS
AVALON
PINE
SPT CO
PALM

EL SEGUNDO
SLOAN
GIBSON

METRO BLUE LINE/SPT CO
CARLIN
BURRIS

CHESTER
OAKS
154TH
EUCLID
68TH
PANNES

OLEANDER

MANVILLE
ESSEY
HOLLY

POINSETTIA
135TH
CAROB
ORIS
PLUM
CENTER
126TH

MCKINLEY
KAY
151ST
SCHOOL

COOKACRE
ROSE
BLISS
PIRU
124TH

PARMELEE
KEMP
138TH
69TH

ATLANTIC
MAYO
131ST
TUCKER
WARD

WILLIAMS
GALE
SPRUCE
137TH
CHERRY
CLARK
APRA
132ND
130TH
ORANGE
PALMER
CLAUDE
PEARL
139TH CRESSEY

HASKINS
POPLAR
SUSANA
136TH
CLOVIS

ORCHARD

TAMARIND
CRANE
PECK
ELVA
LARGO
142ND

RAYMOND
NORD

BENNETT
DELTA
OLANDA

LINSLEY
MURIEL
SPRING
134TH
123RD
LAUREL

GARDENA

SOMERSET
REEVE

SANDHILL
WILLOW
DWIGHT
CARESS

SAN LUIS
ANZAC
150TH

HARCOURT
VESTA
149TH
148TH
LOCUST

ALBERTONI
GRAPE
BORT
119TH
HARBOR
MOTZ
WEBER

BANNING
PEACH

SAN JOSE

HUNSAKER
120TH
BURTON
TAPER

PAULINE
ANITA
INDIGO
KILLEN

VAN NESS
WRIGHT

TICHENOR
CUZCO
RAHN

VISALIA
72ND
TEMPLE
KONA

LAVINIA

ELIZABETH
CULVER
LUCIEN
155TH

WILLOWBROOK

STANFORD
LOUISE
EXMOOR
169TH
CLYMAR
SHORT
CAIRN
DIXON

ARBUTUS

HATCHWAY

EL CAMINO
PEAR
KEENE
OAK
STATE

GREENLEAF NORTHWOOD
CARO

GUNLOCK
122ND

TARRANT
ELIZA
GOLDEN
PIXLEY
ALPINE
CAHITA
WHITE

CASWELL
KNOPF
SLATER
AGNES
DIANE

APRILIA

MCMILLAN

WALDORF

MCDIVITT
IVA
125TH
163RD
71ST
CEDAR
133RD
SHAUER
165TH
166TH
AUTO

ANDERSON
153RD
152ND
BOWEN
COCOA
127TH

WHITEMARSH
MYRRH
BUTLER
SCOTT
MAHALO
DERN
ORCUTT
129TH
KEEGAN
ADAMS
145TH
1ST

BELHAVEN
TARTAR

CORLETT

SALINAS
SHERER
MONDO

GLENCOE

ALHAMBRA

FRAILEY
67TH
FORHAN

JOHNSON
ALMOND
HARLAN
MARGAY

WAYSIDE

SAN VINCENTE

STOCKTON

STANLEY
REYES
HEATH
GUNDRY
121ST

LAS HERMANAS
EVERS

SPORTSMAN
LONESS

PETROLIA
MEALY

THORSON

TAJAUTA

BILLINGS
BAHAMA
RIDDLE
MAPLE

BRADFIELD

COACHELLA

BARCLAY

MAGNOLIA
TRAUB

LANTANA

ALFONSO

EZMIRLIAN

PELLEUR
POPPY

PACIFIC

REDONDO BEACH

AMANTHA
NEVADA

ORLEANS

ANSMITH
144TH

MANETTE
MAIE

STONEACRE

TRAFFORT

MARCELLE
OLIVE

RAYBORN
159TH

CATALINA

INDUSTRY

DELCOMBRE
NESTOR
TAYLOR
NILAND

BITTERLAKE

CASTLEGATE

BEECHLEY

MAGDELENA
BRAZIL
PLAZA
ZAMORA

ARLINGTON

CORNISH

PENROSE

KALSMAN
ALVADA
ESTHER

CALIFORNIA

GRANDEE

MATTHISEN

VIRGINIA

WASHINGTON

CLIVEDEN
TOWNE

CORYDON

AIRLINE
ALVARO

SAN MARCUS

QUEENSDALE
JUNE

BRAYTON

ELEANOR

HILLFORD

SAN ANTONIO
DUMA
HALO
WINONA
WILSON

GERTRUDE

HICKORY
158TH

STOCKWELL
157TH
GRAHAM

CORREGIDOR
BALES

DOUGLAS

ALBERTSON
ARANBE
ADANA

DEL MAR
JANIS
70TH

BROADACRES

PLEASANT

PALMERSTONE
NEECE

BLAKLEY

WADSWORTH
CORAL
LENNON
140TH
ISHIDA
EDISON

CYPRESS

JOSEPHINE
FUEGO

PAULSEN
DARLAN

BENTLEY
WATER

HOMESTEAD

SAN JUAN

MARK KEPPEL

MILLMARK
NORDBY

SAN RAFAEL

SAN CARLOS

CHARLES WILLARD

SAN PEDRO

SAN MIGUEL

HARWICK

SAUNDERS

MARKTON

DALHART
HOLMES

BELFOREST

WALNUT PARK

ADDINGTON

BANDERA
FLOWER
ACOMA
BARRON
SIERRA

MARGUERITA

DEFIANCE

MAGNOLIA

EL SEGUNDO
132ND
DWIGHT

VISALIA
153RD

LAVINIA

OLEANDER
SCHOOL

THORSON
GALE
151ST

MARCELLE
KEENE

STOCKWELL
ACACIA
153RD

EZMIRLIAN
ELM

HILLFORD
HARRIS
BOWEN

WILLOWBROOK
125TH
CARLIN
138TH
ORIS
ROSE
138TH

TICHENOR

BENNETT

WILLOWBROOK
KEMP

JOHNSON
PEARL
139TH MCMILLAN NESTOR
129TH
130TH
AUTO

CORLETT

STOCKTON
127TH

BENNETT

TAJAUTA

CHESTER
BURRIS
CEDAR
SPT CO
126TH
NESTOR
IVA
WARD
COCOA

WILMINGTON
124TH

PAULSEN
NILAND
REEVE
TUCKER

CLIVEDEN

WADSWORTH
129TH
131ST
MAIE
HARRIS

JOHNSON
138TH
HEATH
123RD

COMPTON
135TH
137TH
LAUREL
AUTO
LIME
CEDAR

CASTLEGATE

CHESTER

POINSETTIA
KEENE
LAUREL
KEMP

STANFORD
SPT CO
127TH
BUTLER
ROSE
BUTLER

RAYMOND
DWIGHT
PALM
70TH

TICHENOR
AUTO
125TH

RAYMOND
KAY
BUTLER
122ND
127TH
69TH
134TH
BARRON

SAUNDERS
133RD

BANDERA
CLYMAR
MYRRH

GRANDEE

GARDENA

NORTHWOOD
BRAZIL

COMPTON

WILLOWBROOK
EVERS
OAK

COMPTON

GRANDEE
AVALON

HILLFORD
132ND
139TH
KEMP
MURIEL
MYRRH
GRAPE

ARBUTUS
PEARL
132ND
SCHOOL
132ND

SAN LUIS
SPRING
ARANBE

HILLFORD
KEENE
136TH
LOUISE
PIRU
133RD
PIXLEY

LONG BEACH

MAGNOLIA

QUEENSDALE
134TH
PALMER
122ND
137TH
WHITE
PALMER
KEMP

THORSON
131ST

BRADFIELD

STONEACRE
PIRU

SAN LUIS
CRANE
67TH
MYRRH

ARBUTUS

MARCELLE

BENNETT
BUTLER
127TH
WILLOW

MCKINLEY
152ND
INDIGO

SAN MARCUS

ALAMEDA
HARRIS

ARTESIA

FRAILEY
NESTOR
MURIEL
LAUREL
LOCUST
130TH
MAYO
PINE
BALES
BAHAMA
WILLOW
122ND
LOCUST

ROSECRANS
PLAZA
124TH

CRESSEY
SLOAN
ROSE
MAPLE

CENTRAL
ELVA
126TH
131ST
MURIEL
123RD
68TH
WHITE

CENTRAL
122ND

CENTRAL
ROSE
SLATER
126TH
PALM

CORLETT
154TH
PALMER

VICTORIA
WHITE

POPLAR TAMARIND
SPT CO
134TH
SPT CO

LONG BEACH

CLIVEDEN

CALDWELL
POPLAR
KEENE
SPRUCE
MYRRH
131ST

CALDWELL
PALMER

CYPRESS
163RD
BRAZIL
137TH

WASHINGTON

TICHENOR CASWELL
136TH
POPLAR
137TH

NORTHWOOD
HARRIS
127TH PEACH

GARDENA

BENNETT
SLATER

BENNETT

KALSMAN

THORSON
ACACIA

THORSON
PALMER

THORSON

CORLETT

WILLIAMS

BROADACRES
70TH

APRILIA

CYPRESS
ACACIA
City of Compton
THIS MAP IS A PUBLIC RESOURCE OF GENERAL INFORMATION. THE CITY OF COMPTON MAKES

NO WARRANTY, REPRESENTATION OR GUARANTY AS TO THE CONTENT, SEQUENCE, ACCURACY, TIMELINESS OR COMPLETENESS OF ANY OF THE DATABASE INFORMATION PROVIDED HEREIN.

THE READER SHOULD NOT RELY ON THE DATA PROVIDED HEREIN FOR ANY REASON. THE CITY OF

COMPTON EXPLICITLY DISCLAIMS ANY REPRESENTATIONS AND WARRANTIES, INCLUDING,

WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE CITY OF COMPTON SHALL ASSUME NO LIABILITY FOR:

1. ANY ERRORS, OMISSIONS, OR INACCURACIES IN THE INFORMATION PROVIDED REGARDLESS OF HOW CAUSED; OR

2. ANY DECISION MADE OR ACTION TAKEN OR NOT TAKEN BY READER IN RELIANCE UPON ANY INFORMATION OR DATA FURNISHED HEREUNDER.

UNZONED
creek
streetsphere
Preliminary Low Impact Development Plan
Concord, Compton
Preparation Date: August 2019
Revised: March 2021
Preliminary Low Impact Development (LID) Plan
Prepared for:

City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
Kim Prijatel
(949) 258-7555
Property:

TTM 82807
APN 6161-001-902
930 W. Compton Boulevard
Compton, CA 90220
Prepared by:

C&V Consulting, Inc.
9830 Irvine Center Drive
Irvine, CA 92618
(949) 916-3800
Philip Malcomson, P.E.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 100
March 2021 ii
Receipt of WDID

REPLACE THIS SHEET
To be provided prior to final approval
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 100
March 2021 iii
Notice of Intent

REPLACE THIS SHEET
To be provided prior to final approval
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 100
March 2021 iv
Table of Contents

SECTION PAGE
SECTION 100
COVER ............................................................................................................................................................ I RECEIPT OF WDID.......................................................................................................................................... II NOTICE OF INTENT...........................................................................................................................................III LIST OF FIGURES............................................................................................................................................ IV LIST OF APPENDICES ...................................................................................................................................... IV PROJECT OWNER’S CERTIFICATION.................................................................................................................. V ENGINEER CERTIFICATION .............................................................................................................................. VI SECTION 200 ...............................................................................................................................................1 A.Contact Information/List of Responsible Parties .......................................................................................1 SECTION 300 ...............................................................................................................................................2 A.References ................................................................................................................................................2 SECTION 400 – BODY OF LID....................................................................................................................3 A.Objectives ..................................................................................................................................................3 B.Project Background and Description .........................................................................................................3 C.Vicinity Map ...............................................................................................................................................3 D.Existing Site Drainage Condition...............................................................................................................4 E.Proposed Site Drainage Conditions ..........................................................................................................5 F.LID Project Types, Characteristics, & Activities.........................................................................................5 G.Pollutant Source Identification and BMP Selection...................................................................................5 H.Source Control BMPs................................................................................................................................6 I.Structural BMPs ........................................................................................................................................10 J.BMP Maintenance, Inspection, and Repair..............................................................................................13 K.Inspection, Maintenance, and Responsibility for BMPs ..........................................................................14 L.Operation/Maintenance Funding after Project Completion......................................................................16 List of Figures
Figure 1: Project Vicinity Map
Figure 2: BMP Exhibit
Figure 3: Impaired Waters
List of Appendices
Appendix A: Volume and Infiltration Calculations & Hydrologic Report Appendix B: Site BMPs
Appendix C: Modular Wetlands System (MWS) Biofiltration Vaults Appendix D: “NO DUMPING – DRAINS TO OCEAN” Stencil Examples Appendix E: Catch Basin Cleaning
Appendix F: General Education Materials
Appendix G: Operation and Maintenance Plan
Appendix H: Geotechnical Investigation
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 100
March 2021 v
Project Owner’s Certification
of the
Preliminary Low Impact Development (LID) Plan
Project Name: Concord
Project Number: Tentative Tract Map No. 82807
APN 6161-001-902
Project Address: 930 W. Compton Boulevard
Compton, CA 90220
This Preliminary Low Impact Development (LID) Plan for the Concord (TM 82807) project has been prepared for City Ventures by C&V Consulting, Inc. It is intended to comply with the requirements of the City of Compton’s Conditions of Approval.

The undersigned is authorized to approve implementation of provisions of this plan as appropriate, and will strive to have the plan carried out by successors consistent with the County of Los Angeles LID Manual and the intent of the NPDES storm water requirements.
"I certify under penalty of law that this document and all attachments were prepared under my jurisdiction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathered the information, to the best of my knowledge and belief, the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.”
Owner’s Name: Kim Prijatel
Owner’s Title: Vice President of Development
Company: City Ventures
Address: 3121 Michelson Drive, Suite 150, Irvine, CA 92612 Email: [email protected]
Telephone No.: (949) 258-7555
Signature: Date:

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 100
March 2021 vi
Engineer Certification
Engineer’s Name: Philip Malcomson
Engineer’s Title: President
Company: C&V Consulting, Inc.

Address: 9830 Irvine Center Drive, Irvine, CA 92618
Email: [email protected]
Telephone No. (949) 916-3800
I hereby certify that this Low Impact Development Plan is in compliance with, and meets the requirements set forth in, Order No. R4-2012-0175, of the Los Angeles Regional Water Quality Control Board.

Engineer’s Signature Date
Place Stamp Here
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 200
March 2021 1
Section 200
A. Contact Information/List of Responsible Parties
The property contact information is:

Kim Prijatel
Tel: (949) 258-7555
City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
The property owner shall have primary responsibility and significant authority for the implementation, maintenance, and inspection of the property BMPs. Duties of the Owner include but are not limited to:
• Implementing all elements of the LID, including but not limited to:
o Implementation of prompt and effective erosion and sediment control measures
o Implementing all non-storm water management, and materials and waste management activities, such as: monitoring, discharges, general site clean-up; vehicle and equipment cleaning, spill control; good construction housekeeping to ensure that no materials other than storm water are discharged which may have an adverse effect on receiving waters or storm drain systems, etc.
• Pre-storm inspections
• Storm event inspections
• Post-storm inspections
• Routine inspections as described in the LID
• Ensuring elimination of all unauthorized discharges
• The Owner shall be assigned authority to mobilize crews in order to make immediate repairs to the control measures.
• Coordinate all of the necessary corrections/repairs are made immediately, and that the project complies with the LID at all times.
• Managing and report any Illicit Connections or Illegal Discharges.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 300
March 2021 2
Section 300
A. References
The following documents are made a part of this LID by reference:
• Project plans and specifications for the City of Compton to support the Concord (TM 82807) project, prepared by C&V Consulting, Inc., 9830 Irvine Center Drive, Irvine, CA 92618.
• County of Los Angeles Department of Public Works, Low Impact Development Standards Manual dated February 2014
• State Water Resources Control Board (SWRCB) National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities, Order No. 2009- 0009-DWQ, NPDES No. CAS000002 dated July 1, 2010
• California Stormwater BMP Handbook – Construction, January 2009. • California Stormwater BMP Handbook – New Development and Redevelopment, January 2003.
• Los Angeles County Municipal Stormwater/ NPDES Permit Order R4-2012-0175 Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 3
Section 400 – Body of LID
A. Objectives
This Low Impact Development (LID) Plan has four main objectives:
1) Identify all pollutant sources, including sources of sediment that may affect the quality of storm water discharges associated with daily use / activity (storm water discharges) from the property site.
2) Identify non-storm water discharges.
3) Identify, construct, implement and maintain Best Management Practices (BMPs) to reduce or eliminate pollutants in storm water discharges and authorized non-storm water discharges from the property site.
4) Develop a maintenance schedule for BMPs designed to reduce or eliminate pollutants.

B. Project Background and Description
The proposed project is located at 930 W. Compton Boulevard in the City of Compton, California and consists of approximately 2.45 acres. The site is bounded by W.

Compton Boulevard to the north, W. 151
st Street and existing single-family residential to
the south, S. Kemp Avenue and existing single-family residential to the east, and Dwight avenue and a liquor store to the west. The project proposes to construct eight buildings of 60 residential units with private garages, private drive aisles, and guest parking areas. The private drive aisle provides access to the residences via two driveway entrances/exits along W. 151
st Street. Drive aisles and parking areas will be composed of asphalt concrete pavement, and landscaping will be incorporated in open-space areas.

The project site is currently vacant with no visible traces of impervious coverage. Thus, pervious coverage is assumed to be 99% for the existing condition of the site per LACPW Hydrology Manual. Proposed condition coverage is assumed to be 86% impervious based on land use per Hydrology Manual.

C. Vicinity Map
The site is located at 930 W. Compton Avenue off of the I-110 freeway in the City of Compton, County of Los Angeles. The site is bounded by W. Compton Boulevard to the north, W. 151
st Street and existing single-family residential to the south, S. Kemp Avenue and existing single-family residential to the east, and Dwight avenue and a liquor store to the west.

Refer to Figure 1 for the Vicinity Map.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 4
D. Existing Site Drainage Condition
The existing site is relatively flat with elevations ranging between approximately 81 feet and 85 feet above mean sea level. Generally, the existing site drainage surface flows overland in the northeasterly direction and overflows into the rights-of-way of W.

Compton Boulevard and S. Kemp Avenue. Within the public rights-of-way, drainage is captured by existing catch basins within W. Compton Boulevard and S. Kemp Avenue and conveyed to an existing Los Angeles County Flood Control District (LACFCD) 66” Reinforced Concrete storm drain facility within W. Compton Boulevard which outlets to the existing Compton Creek. Compton Creek flows in the southeasterly direction and outlets to the existing Los Angeles River which ultimately drains to the Pacific Ocean at San Pedro Bay. Water bodies downstream of the project site are listed on the most current 303 (d) List as follows:
• Compton Creek
o Benthic-Macroinvertebrate Bioassessments
o Coliform Bacteria
o Copper
o Lead
o pH
o Trash
• Los Angeles River
o Ammonia
o Cadmium
o Coliform Bacteria
o Dissolved Copper
o Cyanide
o Diazinon
o Lead
o Nutrients (Algae)
o pH
o Trash
o Dissolved Zinc
• San Pedro Bay
o Chlordane
All facilities downstream of the project site are engineered, therefore the project is exempt from Hydromodification Control requirements.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 5
E. Proposed Site Drainage Conditions
The proposed development site comprises a total of 2.45 acres. The proposed site consists of 60 residential units with private garages, a private drive aisle, sidewalks, guest parking areas, and associated landscaping.

Proposed drainage will be directed as sheet flow overland and through a series of area drains towards proposed Modular Wetlands System (MWS) Biofiltration Vaults for water quality treatment prior to discharging to the existing LACFCD 66” storm drain within W.

Compton Boulevard. The proposed area drain system will collect surface runoff within landscaped and backyard areas and convey flows directly to the proposed MWS Biofiltration Vaults via proposed underground storm drain. Street surface flows will be conveyed via proposed curb and gutter towards two (2) proposed curb-inlet catch basins located along the private drive aisle. The proposed catch basins will be equipped with a Dvert system designed to divert low flows to the proposed MWS Biofiltration Vaults. Treated stormwater will be conveyed via proposed underground storm drain to proposed underground detention systems which will be outflow controlled to mitigate peak discharge to the existing LACFCD storm drain within W. Compton Boulevard.

During larger storm events and when the MWS Biofiltration Vaults are at capacity, the Dvert system within the catch basins and an internal bypass within the MWS Biofiltration Vaults will allow for high flows to bypass treatment and flow directly to the proposed detention systems via the proposed storm drain system. Drainage from the site will be conveyed from the detention system to the existing LACFCD 66” storm drain at two (2) points of connection. Upon discharging to the existing LACFCD storm drain, site runoff will follow the historic drainage pattern.

Refer to Figure 2, BMP Exhibit for additional information.

F. LID Project Types, Characteristics, & Activities
Per the Los Angeles Department of Public Works (LACDPW), Low Impact Development Standards Manual, dated February 2014, the proposed project is classified as a “Designated Project.” A “Designated Project” is defined by the LACDPW as follows:
“Redevelopment projects, which are developments that result in creation or addition or replacement of either: (1) 5,000 square feet or more of impervious surface on a site that was previously developed as described in the above bullets; or (2) 10,000 square feet or more of impervious surface area on a site that was previous developed as a single family home.”
G. Pollutant Source Identification and BMP Selection
The following is a list of materials to be used in the daily construction activities at the project site, which will potentially contribute to pollutants, other than sediment, to storm water runoff. Control Practices for each activity are identified below:

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 6
• Vehicle fluids, including oil, grease, petroleum, and coolants from personal vehicles
• Landscaping materials and wastes (topsoil, plant materials, herbicides, fertilizers, mulch, pesticides)
• General trash debris and litter
• Pet waste (bacteria/ fecal coliforms)
The Best Management Practices (BMPs) that have been selected for implementation on this project are detailed in the following sections.

H. Source Control BMPs
Project proponents shall implement Site Design concepts that achieve each of the following:
• Minimize Urban Runoff
• Minimize Impervious Footprint
• Conserve Natural Areas
• Minimize Directly Connected Impervious Areas (DCIAs)
Table-1 identifies the source control and treatment BMPs and how each is implemented to achieve each Site Design concept. BMP fact sheets are provided by the LACDPW Low Impact Development Standards Manual and the California Stormwater Quality Association.

Table-1: Source Control BMPs
BMP
BMP

DESCRIPTION

CHECK ONE IF NOT

APPLICABLE,

STATE BRIEF
INCLUDED? REASON
NOT

APPLICABLE
Non-Structural
Source Control
BMPs:

Education for
Leasers’, Operators,
Occupants, or
Employees
X
Activity Restrictions
(CC&Rs) X
S-8
Landscape Irrigation
Practices
X
Common Area Litter
Control X
SE-7
Street Sweeping
Private Streets and
Parking Lots
X
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 7
BMP
BMP

DESCRIPTION

CHECK ONE IF NOT

APPLICABLE,

STATE BRIEF
INCLUDED? REASON
NOT

APPLICABLE
Drainage Facility
Inspection and
Maintenance
X
Structural Source
Control BMPs:

S-1
Storm Drain
Message and
Signage
X
S-8
Landscape Irrigation
Practices
X
SD-11
Roof Runoff
Controls
X
Protect Slopes and
Channels X
No proposed slopes
and channels
S-6
Outdoor
Vehicle/Equipment/
Accessory Washing
Area
X
No proposed car wash
racks
Proper Site
Design:

S-7
Fuel and
Maintenance Area X
No proposed fueling
areas
SD-33 Air/Water Supply
Area Drainage X
No proposed air/water
supply
S-3
Outdoor Trash
Storage and Waste
Handling Area
X
No proposed waste
handling areas
S-4
Outdoor Loading/
Unloading Dock
Area
X
No proposed
loading/unloading dock
areas
S-5
Outdoor
Vehicle/Equipment
Repair/Maintenance
Area
X
No proposed
maintenance bays
S-6
Outdoor
Vehicle/Equipment/
Accessory Washing
Area
X
No proposed wash
areas
S-2
Outdoor Material
Storage Area X
No proposed material
storage areas
SD-36
Outdoor Work
Areas or Processing
Areas
X
No proposed outdoor
work areas
Provide Wash
Water Controls for
Food Preparation
Areas
X
No proposed food
preparation areas
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Concord, Compton
City Ventures Section 400
March 2021 8
Non-Structural Measures
Non-structural BMPs are generally managerial, educational, inspection and/ or maintenance oriented. These items consist of educating employees and occupants, developing and implementing HOA guidelines, implementing BMPs and enforcing Code requirements. Non-structural BMPs used for this project are summarized below:

Education for Employees and Occupants
Practical informational materials will be provided to homeowners, HOA and employees on general good housekeeping practices that contribute to protection of storm water quality. Among other things, these materials will describe the use of chemicals (including household type) that should be limited to the property, with no discharge of specified wastes via hosing or other direct discharge to gutters, catch basins and storm drains. Initially, the Owner will provide these materials. Thereafter, such materials will be available through the HOA education program.

This program must be maintained, enforced, and updated periodically by the HOA.

Educational materials including, but not limited to, the materials included in the Appendix F of this plan will be made available to the employees and contractors of the HOA.

Activity Restrictions
Activities on this site will be limited to activities related to residential living. The project’s Conditions, Covenants, and Restrictions (CC&Rs) will outline the activities that are restricted on the property. Such activities related to the LID include car washing, car maintenance and disposal of used motor fluids, pet waste cleanup, and trash container areas.

Efficient Landscape System & Landscape Maintenance
Management programs will be designed and established by the HOA, who will maintain the common areas within the project site. These programs will include how to mitigate the potential dangers of fertilizer and pesticide usage (refer to the Maintenance and Frequency Table). Ongoing maintenance will be consistent with the State of California Model- Water Efficient Landscape Ordinance. Fertilizer and pesticide usage shall be consistent with County Management Guidelines for use of Fertilizers and Pesticides.

Street Sweeping in Private Streets and Parking Lots
The HOA shall have all streets and parking lots swept on a weekly basis. This procedure will be intensified around October 15th of each year prior to and throughout rain storm period.

Drainage Facility Inspection & Maintenance
The HOA will be responsible for implementing each of the BMPs detailed in this plan.

The HOA will also be responsible for cleaning and maintaining the BMPs on a regular basis. Refer to Appendix G for the Operation and Maintenance Plan. Refer to Appendix C for site specific drainage BMP information.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 9
Storm Drain Stenciling/ Signage
Phrase "No Dumping – Drains to Ocean" or equally effective phrase to be stenciled on catch basins to alert the public to the destination of pollutants discharged into storm water. This stenciling will be inspected and re-stenciled on a periodic basis by the HOA.

Refer to Table 4 for maintenance frequency.

Landscape & Irrigation System Design
As part of the design of all common area landscape irrigation shall employ water conservation principals, including, but not limited to, such provisions as water sensors, programmable irrigation times (for short cycles), etc. will be used. Such common areas will be maintained by the HOA.

Common Area Litter Control
The HOA must implement trash management and litter control procedures in common areas aimed at reducing pollution of drainage water. The HOA may contract a landscape maintenance company to provide this service during regularly scheduled maintenance which will consist of litter patrol and noting trash disposal violations and reporting the violations to the HOA for investigation.

Title 22 CC&R Compliance
The HOA will comply with this Regulation as part of the development’s CC&Rs. CC&Rs will be prepared as a separate document and reviewed by the City’s Attorney.

Uniform Fire Code Implementation
The HOA will comply with this Code as part of the development’s CC&Rs. CC&Rs will be prepared as a separate document and reviewed by the City’s Attorney.

Employee Training
A training program will be established as it would apply to future employees, contractors, and homeowners of the HOA to inform and train in maintenance activities regarding the impact of dumping oil, paints, solvents, or other potentially harmful chemicals into storm drains; the proper use of fertilizers and pesticides in landscaping maintenance practices; and the impacts of littering and improper water disposal.

The HOA (or a hired firm) will conduct the training program which will include targeted training sessions with specific construction disciplines (landscaping, concrete finishers, painters, etc.). See Appendix F for examples of educational materials that will be provided to the Employees.

The project’s CC&Rs will include provisions for future employee training programs conducted on a yearly based prior to the rainy season.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 10
I. Structural BMPs
Structural BMPs shall be installed by the developer, through the construction and development of the project, for instance; landscaping and irrigation systems shall be designed by licensed landscape architects and installed by qualified contractors to specifications and standards of the City of Compton. The structural BMPs used for this project are summarized below:

Expected pollutants associated with this development include vehicle discharge fluids, landscaping materials and waste, litter, and pet waste. To mitigate these pollutants, the structural best management practices summarized below.

Table-2: Design BMPs

BMP TECHNIQUE
INCLUDED?

YES NO BRIEF DESCRIPTION OF METHOD
SD-10
Minimize Impervious
Area/Maximize
Permeability (CFactor Reduction)
X
We have incorporated landscape
areas wherever possible within the
project site. See Appendix B for
details.

Minimize Directly
Connected
Impervious Areas
(DCIAs) (C-Factor
Reduction)
X
We minimize DCIAs by limiting
sidewalks and parking areas to the
minimum necessary for proper use.

Stepping stones are used in areas
with minimal foot traffic.

Create Reduced or
“Zero Discharge”
Areas (Runoff
Volume Reduction)
X
The entire SWQDV will be infiltrated,
resulting in an overall runoff volume
reduction.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 11
Table-3: Treatment BMPs

BMP NAME
INCLUDED? IF NOT APPLICABLE, STATE BRIEF

YES NO REASON
VEG-5
Vegetated Filter
Strip
X Alternative BMP selected
VEG-4 Vegetated Swale X Space not available for BMP
MP-40 Media Filter X Alternative BMP selected
MP-52 Drain Inserts X Alternative BMP selected
T-3
Extended Detention
Basin X Alternative BMP selected
T-4 Wet Pond X Alternative BMP selected
T-2
Constructed
Wetland
X Alternative BMP selected
T-1 Sand Filter X Alternative BMP selected
RET-5
Permeable
Pavement without
an Underdrain
X Alternative BMP selected
RET-2 Infiltration Basin X Alternative BMP selected
RET-3 Infiltration Trench X Alternative BMP selected
TC-40 Media Filter X Alternative BMP selected
BIO-1 Biofiltration X MWS Biofiltration Vaults will be utilized in the proposed development.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 12
Biofiltration: Modular Wetlands System, Biofiltration Units Modular Wetland System (MWS) Biofiltration Vaults will be utilized to capture and treat the stormwater runoff prior to leaving the site. MWS utilizes a 3-phase treatment train by conveying stormwater runoff through a pre-treatment chamber, planting or “Wetland” chamber and discharge chamber. Treated stormwater will be discharged into the proposed underground storm drain system which connects directly to the an existing LACFCD 66” storm drain system within W. Compton Boulevard.

Based on the grading and drainage design, the site will be divided into two (2) Drainage Management Areas (DMA) and utilize two (2) MWS Biofiltration Vaults to provide treatment of stormwater runoff. The design flowrate and treatment capacity for each DMA are as follows:

Drainage
Management
Area (DMA)
Size (ac) Peak Flow
Rate (cfs)*
Peak Flow
Rate x 1.5 (cfs)
MWS Model

MWS HGL
Height (ft)
Treatment
Capacity (cfs)
1 1.085 0.237 0.356 MWS-L-8-16-V 3.4 0.462
2 1.365 0.298 0.447 MWS-L-8-16-V 3.4 0.462
Total 2.45 0.535 0.803 - 0.924
*Los Angeles County Department of Public Works (LACDPW) HydroCalc Software was utilized to calculate peak flowrates. The governing flowrate between the 0.75-inch storm event and the 85
th Percentile storm event was utilized for design. Refer to Appendix A for HydroCalc outputs.

The proposed site will generate a total design flowrate of approximately 0.535 cfs. After multiplying this value by a factor of 1.5, the required treatment flowrate equals 0.803 cfs.

The MWS Biofiltration Vaults provide a total treatment capacity of approximately 0.924 cfs and therefore provide more than enough treatment for the proposed development.

The MWS systems will address the pollutants of concern associated with the development type. Refer to Appendix C for more information on MWS Biofiltration Vaults.

Catch Basin Inspection
The HOA will maintain the drainage systems, including catch basins and culverts. The HOA is required to have catch basins inspected and, if necessary, cleaned prior to the storm season, no later than October 15th each year or prior to the first 24-hour storm event, whichever occurs first. These duties may be contracted out to the landscape maintenance firm hired by the HOA. Please see Appendix E for maintenance program.

Refer to Appendix G for the Operation and Maintenance Plan.

Runoff-Minimizing Landscape Design
As part of the design of all common area landscape areas, similar planting material with similar water requirements will be used in order to reduce excess irrigation runoff and promote surface filtration. Such common areas will be maintained by the HOA.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 13
Community Car Wash Racks
No community car wash rack or area will be provided, therefore, vehicle washing by residents on the property will not be allowed per the CC&Rs.

Self-Contained Washing
Self-contained washing of vehicles by residents or owners on the property will not be allowed per the CC&Rs.

Outdoor Material Storage Areas
Outdoor material storage areas refer to storage areas or storage facilities solely for the storage of materials. Improper storage of materials outdoors may provide an opportunity for toxic compounds, oil and grease, heavy metals, nutrients, suspended solids, and other pollutants to enter the storm water conveyance system. Outdoor Storage by residents or owners on the property will not be allowed per the CC&Rs.

J. BMP Maintenance, Inspection, and Repair
Inspections will be conducted as follows:
• Annually and prior to the start of the rainy season
• Every (1) month during rainy season
• At any other time(s) or intervals of time specified in the contract documents Repairs and/ or maintenance procedures shall be carried out at the soonest possible time.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 14
K. Inspection, Maintenance, and Responsibility for BMPs Table-4 and Table-5 show the lists of the post-construction BMPs (routine non-structural and structural), the required ongoing maintenance, the inspection and maintenance frequency, the inspection criteria, and the entity or party responsible for implementation, maintenance, and/or inspection.

Table-4: Non-Structural BMP Maintenance Responsibility/Frequency Matrix

BMP RESPONSIBILITY FREQUENCY
Homeowner/
Business owner
Education,
Activity
Restrictions
HOA will provide
educational materials.

Those materials and
responsibilities must be
passed onto subsequent
property owners.

Continuous. CC&Rs to be provided to
homeowners at the time they purchase the
property and updates provided by the HOA as
they occur.

Common Area
Landscape
Management
HOA will appoint a
landscape maintenance
contractor
Monthly during regular maintenance and use
with management guidelines for use of
fertilizers and pesticides.

Parking Areas
and Drive Aisle
Management
HOA
The Drives Aisles are to be swept on a routine
scheduled basis to facilitate the pickup of trash
and debris (plant or otherwise) and to remove
excessive oil, grease and build-up. During
sweeping, debris is to be removed from the
parking areas and drives and then scrubbed
and rinsed. This sweeping schedule will be at a
minimum occurrence of once a week and as
necessary to rid / reduce active pollutants from
the pavement areas. This maintenance
requirement will be listed in the Convent,
Conditions and Restrictions (CC&Rs) of this
project. These CC&Rs will be recorded to the
property at the County Recorder’s Office and
be included on the final Title report of these
properties.

Litter Control by
Sweeping HOA
Weekly inspection of trash receptacles to
ensure that lids are closed and pick up any
excess trash on the ground, noting trash
disposal violations to the HOA for remediation.

Employee
Training HOA
Monthly for maintenance personnel and
employees to include the educational materials
contained in the approved LID.

Common Area
Catch Basin
Inspection &
Cleaning
HOA will appoint a
landscape maintenance
contractor for common
areas and storm drain
facilities.

Inspect basins once a month. Clean debris and
silt in bottom of catch basins as needed.

Intensified on or about October 15th each year
or prior to the first 24-hour storm event,
whichever occurs first.

Refer to Appendix E.

Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 15
Table-5: Structural BMP Maintenance Responsibility/ Frequency Matrix

BMP RESPONSIBILITY FREQUENCY
Common Area
Efficient Irrigation
HOA will appoint a
landscape
contractor after
construction
Once a week, in conjunction with maintenance
activities. Verify that runoff minimizing landscape
design continues to function by checking that
water sensors are functioning properly, that
irrigation heads are adjusted properly to eliminate
overspray to hardscape areas, and to verify that
irrigation timing and cycle lengths are adjusted in
accordance with water demands, given time of
year, weather and day or night time temperatures.

Common Area
Runoff Efficient
Landscape
Design
HOA will appoint a
landscaping
contractor
Once a week in conjunction with maintenance
activities and prior to finalizing any replanting
schemes. Verify that plants continue to be
grouped according to similar water requirements
in order to reduce excess irrigation runoff.

Modular Wetlands
System (MWS)
Biofiltration Vaults
HOA
MWS Biofiltration Vaults maintenance will conform
to manufacturer’s specifications. Please see
additional information in Appendix C
Preliminary Low Impact Development Plan
Concord, Compton
City Ventures Section 400
March 2021 16
L. Operation/Maintenance Funding after Project Completion The post-construction BMPs as described above will be funded and maintained by:

Kim Prijatel
Tel: (949) 258-7555
City Ventures
3121 Michelson Drive, Suite 150
Irvine, CA 92612
Maintenance and requirements of the maintenance for the properties will be listed in the Convent, Conditions and Restrictions (CC&Rs) of this project and will be the responsibility of the property owner at all times. These CC&Rs will be recorded to the property at the County Recorder’s Office and be included on the Title report of these properties.

Preliminary Low Impact Development Plan
Concord, Compton
Figure 1:

Project Vicinity Map

P
reliminaryLowImpactDevelopmentPlan
Concord,Compton
Figure 2:

BMP Exhibit
0 SCALE: 1" = 30' 15 30 60 EV
Preliminary Low Impact Development Plan
Concord, Compton
Figure 3:

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FRANKLIN
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CARSON LONG
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ESTATES

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ROLLING
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CANADA

FLINTRIDGE

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HILLS

ESTATES

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HUNTINGTON
PARK
SIGNAL
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HOLLYWOOD

HERMOSA
BEACH
SOUTH

PASADENA
WATTS
PALMS
ATHENS
MONETA
LENNOX
VENICE
RESEDA

TOPANGA

TARZANA

BIG ROCK

GLENVIEW

WALTERIA

ROSEWOOD

EL PORTO

FLORENCE

CRENSHAW

WESTLAKE

WESTWOOD

FERNWOOD

VAN NUYS

WINNETKA

SAN PEDRO

MIRALESTE

DOMINGUEZ

HOLLYDALE

HYDE PARK

VIEW PARK

FOX HILLS

MAR VISTA

KOREATOWN

BRENTWOOD

ECHO PARK

LOS FELIZ OLD CANYON

WILMINGTON

OCEAN PARK

EAGLE ROCK

WEST HILLS

HARBOR CITY

WALNUT PARK

WILLOWBROOK

WESTCHESTER

SYLVIA PARK

CANOGA PARK

BIXBY KNOLLS

LEIMERT PARK

CITY TERRACE

HANCOCK PARK PARK LA BREA

CENTURY CITY

CYPRESS PARK

BEVERLY GLEN

SHERMAN OAKS

VERDUGO CITY

PLAYA DEL REY

WINDSOR HILLS

BALDWIN HILLS

BOYLE HEIGHTS

CASTELLAMMARE

HIGHLAND PARK
MT WASHINGTON GLASSELL\PARK

MOUNT OLYMPUS

WARNER CENTER

HARBOR GATEWAY

MARINA DEL REY

JEFFERSON PARK

MONTEREY HILLS

UNIVERSAL CITY

VALLEY VILLAGE WOODLAND HILLS

TERMINAL ISLAND

PORTUGUESE BEND

ATWATER VILLAGE

BEL AIR ESTATES

NORTH HOLLYWOOD

RANCHO DOMINGUEZ

NORTH LONG BEACH

EAST LOS ANGELES

HOLLYWOOD RIVIERA

EL CAMINO VILLAGE

COUNTRY CLUB PARK

PACIFIC PALISADES

PALISADES HIGHLANDS

CALABASAS HIGHLANDS
REF: \\pwgisd02\mpmgis$\MPMGIS\projects\mpm\gismaps\wk_2627\ballonacreeketc_wtrsheds.mxd DATE: 08/22/07 Data contained in this map is produced in whole
or part from the Los Angeles County Department
of Public Works' digital database.
0 0.875 1.75 3.5
MILES
I
Mapping & Property Management Division, Mapping & GIS Services Section LEGEND

BALLONA CREEK & OTHER URBAN WATERSHED

UNINCORPORATED AREA

DAM / LAKE / RESERVOIR

MAJOR RIVER

MAJOR CHANNEL

COUNTY OF LOS ANGELES

BALLONA CREEK & OTHER URBAN WATERSHEDS
Project
Site
Preliminary Low Impact Development Plan
Concord, Compton
Appendix A:

Volume and Infiltration Calculations & Hydrologic Report The proposed development was analyzed for the 0.75-in storm event and the 85th Percentile storm event using the LACDPW HydroCalc software. The governing peak flowrate between the two storm events was utilized for design. In accordance with the LA County BMP Design Manual, a factor of 1.5 was applied to obtain the design flowrate. Below is a summary of the HydroCalc outputs:

DMA 85th Percentile Storm ✓ 0.75-in Storm Governing
Flowrate (cfs)
Flowrate
Volume (cf) Flowrate (cfs) Volume (cf) Flowrate (cfs) x 1.5 (cfs) 1 2678 0.237 2308 0.195 0.237 0.356
2 3369 0.298 2904 0.245 0.298 0.447
Refer to LACDPW HydroCalc Output Data within this Appendix for Volume and Flowrate Calculations.

Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary LID/Appendix A - Calculations/20210330/CVEN-125_LID - DA 1, 85TH.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125_LID
Subarea ID DA 1
Area (ac) 1.085
Flow Path Length (ft) 258.0
Flow Path Slope (vft/hft) 0.009
85th Percentile Rainfall Depth (in) 0.87
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 85th percentile storm
Fire Factor 0
LID True
Output Results
Modeled (85th percentile storm) Rainfall Depth (in) 0.87 Peak Intensity (in/hr) 0.2772
Undeveloped Runoff Coefficient (Cu) 0.1
Developed Runoff Coefficient (Cd) 0.788
Time of Concentration (min) 19.0
Clear Peak Flow Rate (cfs) 0.237
Burned Peak Flow Rate (cfs) 0.237
24-Hr Clear Runoff Volume (ac-ft) 0.0615
24-Hr Clear Runoff Volume (cu-ft) 2677.8096
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary LID/Appendix A - Calculations/20210330/CVEN-125_LID - DA 1, 0.75IN.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125_LID
Subarea ID DA 1
Area (ac) 1.085
Flow Path Length (ft) 258.0
Flow Path Slope (vft/hft) 0.009

0.75-inch Rainfall Depth (in) 0.75
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 0.75 inch storm
Fire Factor 0
LID True
Output Results
Modeled (0.75 inch storm) Rainfall Depth (in) 0.75
Peak Intensity (in/hr) 0.2279
Undeveloped Runoff Coefficient (Cu) 0.1
Developed Runoff Coefficient (Cd) 0.788
Time of Concentration (min) 21.0
Clear Peak Flow Rate (cfs) 0.1949
Burned Peak Flow Rate (cfs) 0.1949
24-Hr Clear Runoff Volume (ac-ft) 0.053
24-Hr Clear Runoff Volume (cu-ft) 2308.4589
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary LID/Appendix A - Calculations/20210330/CVEN-125_LID - DA 2, 85TH.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125_LID
Subarea ID DA 2
Area (ac) 1.365
Flow Path Length (ft) 259.0
Flow Path Slope (vft/hft) 0.0097
85th Percentile Rainfall Depth (in) 0.87
Percent Impervious 0.86
Soil Type 3
Design Storm Frequency 85th percentile storm
Fire Factor 0
LID True
Output Results
Modeled (85th percentile storm) Rainfall Depth (in) 0.87 Peak Intensity (in/hr) 0.2772
Undeveloped Runoff Coefficient (Cu) 0.1
Developed Runoff Coefficient (Cd) 0.788
Time of Concentration (min) 19.0
Clear Peak Flow Rate (cfs) 0.2981
Burned Peak Flow Rate (cfs) 0.2981
24-Hr Clear Runoff Volume (ac-ft) 0.0773
24-Hr Clear Runoff Volume (cu-ft) 3368.8572
Peak Flow Hydrologic Analysis
File location: P:/C/CVEN-125/Admin/Reports/Preliminary LID/Appendix A - Calculations/20210330/CVEN-125_LID - DA 2, 0.75IN.pdf Version: HydroCalc 1.0.3
Input Parameters
Project Name CVEN-125_LID
Subarea ID DA 2
Area (ac) 1.365
Flow Path Length (ft) 259.0
Flow Path Slope (vft/hft) 0.0097

Site BMPs
County of Los Angeles D-1 February 2014
S-1: Storm Drain Message and Signage
Purpose
Waste material dumped into storm drain inlets can adversely impact surface and ground waters. In fact, any material discharged into the storm drain system has the potential to significantly impact downstream receiving waters. Storm drain messages have become a popular method of alerting and reminding the public about the effects of and the prohibitions against waste disposal into the storm drain system. The signs are typically stenciled or affixed near the storm drain inlet or catch basin. The message simply informs the public that dumping of wastes into storm drain inlets is prohibited and/or that the drain ultimately discharges into receiving waters.

General Guidance
 The signs must be placed so they are easily visible to the public.  Be aware that signs placed on sidewalk will be worn by foot traffic.

Design Specifications
 Signs with language and/or graphical icons that prohibit illegal dumping, must be posted at designated public access points along channels and streams within the project area. Consult with Los Angeles County Department of Public Works (LACDPW) staff to determine specific signage requirements for channels and streams.
 Storm drain message markers, placards, concrete stamps, or stenciled language/icons (e.g., “No Dumping – Drains to the Ocean”) are required at all storm drain inlets and catch basins within the project area to discourage illegal or inadvertent dumping. Signs should be placed in clear sight facing anyone approaching the storm drain inlet or catch basin from either side (see Figure D-1 and Figure D-2). LACDPW staff should be contacted to determine specific requirements for types of signs and methods of application. A stencil can be purchased for a nominal fee from LACDPW Building and Safety Office by calling (626) 458-3171. All storm drain inlet and catch basin locations must be identified on the project site map.

Maintenance Requirements
Legibility and visibility of markers and signs should be maintained (e.g., signs should be repainted or replaced as necessary). If required by LACDPW, the owner/operator or homeowner’s association shall enter into a maintenance agreement with the agency or record a deed restriction upon the property title to maintain the legibility of placards and signs.

S-1: Storm Drain Message and Signage
County of Los Angeles D-2 February 2014
Figure D-1. Storm Drain Message Location – Curb Type Inlet Figure D-2. Storm Drain Message Location – Catch Basin/Area Type Inlet

CONCRETE

PERIMETER
County of Los Angeles D-19 February 2014
S-8: Landscape Irrigation Practices
Purpose
Irrigation runoff provides a pathway for pollutants (i.e., nutrients, bacteria, organics, sediment) to enter the storm drain system. By effectively irrigating, less runoff is produced resulting in less potential for pollutants to enter the storm drain system.

General Guidance
 Do not allow irrigation runoff from the landscaped area to drain directly to storm drain system.
 Minimize use of fertilizer, pesticides, and herbicides on landscaped areas.  Plan sites with sufficient landscaped area and dispersal capacity (e.g., ability to receive irrigation water without generating runoff).
 Consult a landscape professional regarding appropriate plants, fertilizer, mulching applications, and irrigation requirements (if any) to ensure healthy vegetation growth.

Design Specifications
 Choose plants that minimize the need for fertilizer and pesticides.  Group plants with similar water requirements and water accordingly.  Use mulch to minimize evaporation and erosion.
 Include a vegetative boundary around project site to act as a filter.  Design the irrigation system to only water areas that need it.  Install an approved subsurface drip, pop-up, or other irrigation system.1The irrigation system should employ effective energy dissipation and uniform flow spreading methods to prevent erosion and facilitate efficient dispersion.  Install rain sensors to shut off the irrigation system during and after storm events.  Include pressure sensors to shut off flow-through system in case of sudden pressure drop. A sudden pressure drop may indicate a broken irrigation head or water line.
 If the hydraulic conductivity in the soil is not sufficient for the necessary water application rate, implement soil amendments to avoid potential geotechnical hazards (i.e., liquefaction, landslide, collapsible soils, and expansive soils). 1 If alternative distribution systems (e.g., spray irrigation) are approved, the County will establish guidelines to implement these new systems.

S-8: Landscape Irrigation Practices
County of Los Angeles D-20 February 2014
 For sites located on or within 50 feet of a steep slope (15% or greater), do not irrigate landscape within three days of a storm event to avoid potential geotechnical instability.2
 Implement Integrated Pest Management practices.

For additional guidelines and requirements, refer to the Los Angeles County Department of Health Services.

Maintenance Requirements
Maintain irrigation areas to remove trash and debris and loose vegetation. Rehabilitate areas of bare soil. If a rain or pressure sensor is installed, it should be checked periodically to ensure proper function. Inspect and maintain irrigation equipment and components to ensure proper functionality. Clean equipment as necessary to prevent algae growth and vector breeding. Maintenance agreements between LACDPW and the owner/operator may be required. Failure to properly maintain building and property may subject the property owner to citation.
2 As determined by the City of Los Angeles, Building and Safety Division

County of Los Angeles E-53 February 2014
BIO-1: Biofiltration
Definition
A biofiltration area is a vegetated shallow depression
that is designed to receive and treat stormwater
runoff from downspouts, piped inlets, or sheet flow
from adjoining paved areas. A shallow ponding
zone is provided above the vegetated surface for
temporary storage of stormwater runoff. During
storm events, stormwater runoff accumulates in the
ponding zone and gradually infiltrates the surface
and filters through the biofiltration soil media before being collected by an underdrain system.

Stormwater runoff treatment occurs through a
variety of natural mechanisms as stormwater runoff filters through the vegetation root zone. In biofiltration areas, microbes and organic material in the biofiltration soil media help promote the adsorption of pollutants (e.g., dissolved metals and petroleum hydrocarbons) into the soil matrix. Plants utilize soil moisture and promote the drying of the soil through transpiration. Biofiltration areas are typically planted with native, drought-tolerant plant species that do not require fertilization and can withstand wet soils for at least 96 hours.

A schematic of a typical biofiltration area is presented in Figure E-7.

LID Ordinance Requirements
Biofiltration can be used as an alternative compliance measure.

Pollutant of Concern Treated by Biofiltration?
Suspended solids No
Total phosphorus No
Total nitrogen Yes
Total Kjeldahl nitrogen Yes
Cadmium, total No
Chromium, total Yes
Copper, total No
Lead, total Yes
Zinc, total No
Source: Treatment Best Management Practices Performance, Los Angeles Regional Water Quality Control Board, December 9, 2013.

BIO-1: Biofiltration
County of Los Angeles E-54 February 2014
Advantages
• Has a low cost for installation
• Enhances site aesthetics
• Requires little maintenance
Disadvantages
• May require individual owner/tenants to perform maintenance BIO-1: Biofiltration
County of Los Angeles E-55 February 2014
Figure E-7. Biofiltration Area Schematic
BIO-1: Biofiltration
County of Los Angeles E-56 February 2014
General Constraints and Implementation Considerations
• Biofiltration areas can be applied in various settings including, but not limited to:
o Individual lots for rooftop, driveway, and other on-site impervious surface o Shared facilities located in common areas for individual lots o Areas within loop roads or cul-de-sacs
o Landscaped parking lot islands
o Within right-of-ways along roads
o Common landscaped areas in apartment complexes or other multi-family housing designs
o Parks and along open space perimeter
• If tire curbs are provided and parking stalls are shortened, cars are allowed to overhang the biofiltration area.
• Biofiltration areas must be located sufficiently far from structure foundations to avoid damage to structures (as determined by a certified structural or geotechnical engineer).
• Any parking areas bordering the biofiltration area must be monolithically poured concrete or deepended curb concrete to provide structural stability to the adjacent parking section.
• Geomembrane liners must be used in areas subject to spills or pollutant hot spots.
• During construction activities should avoid compaction of native soils below planting media layer or gravel zone.
• Stormwater runoff must be diverted around the biofiltration area during the period of vegetation establishment. If diversion is not feasible, the graded and seeded areas must be protected with suitable sediment controls (i.e., silt fences).All damaged areas should be repaired, seeded, or re-planted immediately. • The general landscape irrigation system should incorporate the biofiltration area, as applicable.

Design Specifications
The following sections describe the design specifications for biofiltration areas.

Geotechnical
Due to the potential to contaminate groundwater, cause slope instability, impact surrounding structures, and potential for insufficient infiltration capacity, an extensive geotechnical site investigation must be conducted during the site planning process to verify site suitability for biofiltration. All geotechnical investigations must be performed according to the most recent GMED Policy GS 200.1. Soil infiltration rates and the BIO-1: Biofiltration
County of Los Angeles E-57 February 2014
groundwater table depth must be evaluated to ensure that conditions are satisfactory for proper operation of a biofiltration area. The project applicant must demonstrate through infiltration testing, soil logs, and the written opinion of a licensed civil engineer that sufficiently permeable soils exist on-site to allow the construction of a properly functioning biofiltration system.

Biofiltration areas are appropriate for soils with a minimum corrected in-situ infiltration rate of 0.3 in/hr. The geotechnical report must determine if the proposed project site is suitable for a biofiltration area and must recommend a design infiltration rate (see “Design Infiltration Rate” under the “Sizing” section). The geotechnical investigation should be such that a good understanding is gained as to how the stormwater runoff will move through the soil (horizontally or vertically) and if there are any geological conditions that could inhibit the movement of water.

Pretreatment
Pretreatment refers to design features that provide settling of large particles before stormwater runoff enters a stormwater quality control measure in order to reduce the long-term maintenance burden. Pretreatment should be provided to reduce the sediment load entering a biofiltration area in order to maintain the infiltration rate of the biofiltration area. To ensure that biofiltration areas are effective, the project applicant must incorporate pretreatment devices that provide sediment removal (e.g., vegetated swales, vegetated filter strips, sedimentation manholes, and proprietary devices). The use of at least two pretreatment devices is highly recommended for biofiltration areas.

Geometry
• Biofiltration areas must be sized to capture and treat 1.5 times the SWQDv that is not reliably retained on the project site with an 18-inch maximum ponding depth. • The planting soil depth must be a minimum of two feet, although three feet is preferred. The planting soil depth should provide a beneficial root zone for the chosen vegetation and adequate water storage for the stormwater runoff. A deeper planting soil depth will also provide a smaller surface area footprint. • A gravel storage layer below the biofiltration area soil media is required to provide adequate temporary storage to retain 1.5 times the SWQDv that is not reliably retained on the project site and to promote infiltration.

Sizing
Biofiltration areas are sized using a simple sizing method where 1.5 times the SWQDv that is not reliably retained on the project site must be completely filtered within 96 hours. If the incoming stormwater runoff flow rate is lower than the long term filtration rate, above ground storage does not need to be provided. If the incoming stormwater runoff flow rate is higher than the long term filtration rate, above ground storage shall be provided (see steps below).

BIO-1: Biofiltration
County of Los Angeles E-58 February 2014
Step 1: Calculate the design volume
Biofiltration areas should be sized to capture and treat 1.5 times the portion of the SWQDv (see Section 6 for SWQDv calculation procedures) that is not reliability retained on the project site, as calculated by the equation below:
%& = 1.5 × ) − %+
,
Where:

VB = Biofiltration volume [ft3];
SWQDv = Stormwater quality design volume [ft3
]; and
VR = Volume of stormwater runoff reliably retained on-site [ft3 ].

Step 2: Calculate the design infiltration rate
Determine the corrected in-situ infiltration rate (fdesign) of the native soil using the procedures described in the most recent GMED Policy GS 200.1.

Step 3: Calculate the surface area
Select a surface ponding depth (d) that satisfies the geometric criteria and meets the site constraints. Selecting a deeper ponding depth (up to 1.5 ft) generally yields a smaller footprint, however, it will require greater consideration for public safety, energy dissipation, and plant selection.

Calculate the time for the selected ponding depth to filter through the planting media using the following equation:
d = ×
f

!"
12 Where:
d = Ponding depth (max 1.5 ft) [ft];
tp = Required detention time for surface ponding (max 96 hr) [hr]; and fdesign = Design infiltration rate [in/hr].

If tp exceeds 96 hours, reduce surface ponding depth (d). In nearly all cases, tp should not approach 96 hours unless fdesign is low.

Calculate the required infiltrating surface (filter bottom area) using the following equation:
=
%&

Where:

BIO-1: Biofiltration
County of Los Angeles E-59 February 2014
A = Bottom surface area of biofiltration area [ft2];
VB = Biofiltration design volume [ft3]; and
d = Ponding depth (max 1.5 ft) [ft].

Flow Entrance and Energy Dissipation
Maintain a minimum slope of 1 percent for pervious surfaces and 0.5 percent for impervious surfaces to the biofiltration area inlet. The following types of flow entrance can be used for biofiltration cells:
• Level spreaders (i.e., slotted curbs) can be used to facilitate sheet flow. • Dispersed, low velocity flow across a landscape area. Dispersed flow may not be possible given space limitations or if the biofiltration area is controlling roadway or parking lot flows where curbs are mandatory. • Dispersed flow across pavement or gravel and past wheel stops for parking areas.
• Flow spreading trench around perimeter of biofiltration area. May be filled with pea gravel or vegetated with 3:1 side slopes similar to a swale. A vertical-walled open trench may also be used at the discretion of LACDPW. • Curb cuts for roadside or parking lot areas, if approved by LACDPW: curb cuts should include rock or other erosion controls in the channel entrance to dissipate energy. Flow entrance should drop two to three inches from curb line and provide an area for settling and periodic removal of sediment and coarse material before flow dissipates to the remainder of the biofiltration area. • Piped entrances, such as roof downspouts, should include rock, splash blocks, or other erosion controls at the entrance to dissipate energy and disperse flows. • Woody plants (trees, shrubs, etc.) can restrict or concentrate flows and can be damaged by erosion around the root ball and must not be placed directly in the entrance flow path.

Drainage
Biofiltration areas must be designed to drain below the planting soil in less than 96 hours. Soils must be allowed to dry out periodically in order to restore hydraulic capacity to receive stormwater runoff from subsequent storm events, maintain infiltration rates, maintain adequate soil oxygen levels for healthy soil biota and vegetation, and provide proper soil conditions for biodegradation and retention of pollutants.

Underdrain
Biofiltration areas require an underdrain to collect and discharge stormwater runoff that has been filtered through the soil media, but not infiltrated, to another stormwater quality control measure, storm drain system, or receiving water. The underdrain must have a mainline diameter of eight inches using slotted PVC SDR 26 or PVC C9000. Slotted PVC allows for pressure water cleaning and root cutting, if necessary. The slotted pipe BIO-1: Biofiltration
County of Los Angeles E-60 February 2014
should have two to four rows of slots cut perpendicular to the axis of the pipe or at right angles to the pitch of corrugations. Slots should be 0.04 to 0.1 inches wide with a length of 1 to 1.25 inches. Slots should be longitudinally-spaced such that the pipe has a minimum of one square inch opening per lineal foot and should face down.

The underdrain should be placed in a gravel envelope (Class 2 Permeable Material per Caltrans Spec. 68-1.025) that measures three feet wide and six inches deep. The underdrain is elevated from the bottom of the biofiltration area by six inches within the gravel envelope to create a fluctuating anaerobic/aerobic zone below the underdrain to facilitate denitrification within the anaerobic/anoxic zone and reduce nutrient concentrations. The top and sides of the underdrain pipe should be covered with gravel to a minimum depth of 12 inches. The underdrain and gravel envelope should be covered with a geomembrane liner to prevent clogging. The following aggregate should be used for the gravel envelope:

Particle Size
(ASTM D422)
% Passing by
Weight
¾ inch 100%
¼ inch 30-60%
#8 20-50%
#50 3-12%
#200 0-1%
Underdrains should be sloped at a minimum of 0.5 percent and must drain freely to an approved discharge point.

Rigid non-perforated observation pipes with a diameter equal to the underdrain diameter should be connected to the underdrain to provide a clean-out port as well as an observation well to monitor drainage rates. The wells/clean-outs should be connected to the perforated underdrain with the appropriate manufactured connections.

The wells/clean-outs should extend six inches above the top elevation of the biofiltration area mulch, and should be capped with a lockable screw cap. The ends of underdrain pipes not terminating in an observation well/clean-out should also be capped.

Hydraulic Restriction Layer
Lateral infiltration pathways may need to be restricted due to the close proximity of roads, foundations, or other infrastructure. A geomembrane liner, or other equivalent waterproofing, may be placed along the vertical walls to reduce lateral flows. This geomembrane liner must have a minimum thickness of 30 mils and meet the requirements of Table E-12. Generally, waterproof barriers should not be placed on the bottom of the biofiltration unit, as this would prevent incidental infiltration which is important to meeting the required pollutant load reduction.

Table E-12. Geomembrane Liner Specifications for Biofiltration Areas BIO-1: Biofiltration
County of Los Angeles E-61 February 2014
Parameter Test Method Specifications
Material Nonwoven geomembrane liner
Unit weight 8 oz/yd3 (minimum)
Filtration rate 0.08 in/sec (minimum)
Puncture strength ASTM D-751 (Modified) 125 lbs (minimum) Mullen burst strength ASTM D-751 400 lb/in2 (minimum)
Tensile strength AST D-1682 300 lbs (minimum)
Equiv. opening size US Standard Sieve No. 80 (minimum)
Planting/Storage Media
• The planting media placed in the biofiltration area should achieve a long-term, inplace infiltration rate of at least 5 in/hr. Higher infiltration rates of up to 12 in/hr are permissible. The biofiltration soil media must retain sufficient moisture to support vigorous plant growth.
• The planting media mix must consist of 60 to 80 percent sand and 20 to 40 percent compost.
• Sand should be free of wood, waste, coatings such as clay, stone dust, carbonate, or any other deleterious material. All aggregate passing the No. 200 sieve size should be non-plastic. Sand for biofiltration should be analyzed by an accredited laboratory using #200, #100, #40, #30, #16, #8, #4, and 3/8 sieves (ASTM D422 or as approved by the local permitting authority) and meet the following gradations (Note: all sand complying with ASTM C33 for fine aggregate comply with the gradation requirements listed below):

Particle Size
(ASTM D422)
% Passing by
Weight
3/8 inch 100%
#4 90-100%
#8 70-100%
#16 40-95%
#30 15-70%
#40 5-55%
#110 0-15%
#200 0-5%
Note: The gradation of the sand component of the biofiltration soil media is believed to be a major factor in the infiltration rate of the media mix. If the desired hydraulic conductivity of the biofiltration soil media cannot be achieved within the specified proportions of sand and compost (#2), then it may be necessary to utilize sand at the coarser end of the range specified minimum percent passing.

BIO-1: Biofiltration
County of Los Angeles E-62 February 2014
• Compost should be a well-decomposed, stable, weed-free organic matter source derived from waste materials including yard debris, wood wastes, or other organic material not including manure or biosolids meeting standards developed by the USCC. The product shall be certified through the USCC STA Program (a compost testing and information disclosure program). Compost quality shall be verified via a laboratory analysis to be:
o Feedstock materials must be specified and include one or more of the following: landscape/yard trimmings, grass clippings, food scraps, and agricultural crop residues.
o pH between 6.5 and 8.0 (may vary with plant palette)
o Organic Matter: 35 to 75 percent dry weight basis
o Carbon and Nitrogen Ratio: 15:1 < C:N < 25:1
o Maturity/Stability: Compost must have a dark brown color and a soil-like odor. Compost exhibiting a sour or putrid smell, containing recognizable grass or leaves, or is hot (120°F) upon delivery or rewetting is not acceptable.
o Toxicity: any one of the following measures is sufficient to indicate nontoxicity:
NH4:NH3 < 3
Ammonium < 500 ppm, dry weight basis
Seed germination > 80 percent of control
Plant trials > 80 percent of control
Solvita® > 5 index value
o Nutrient content:
Total Nitrogen content ≥ 0.9 percent preferred
Total Boron should be < 80 ppm; soluble boron < 2.5 ppm o Salinity: < 6.0 mmhos/cm
o Compost for biofiltration area should be analyzed by an accredited laboratory using #200, ¼-inch, ½-inch, and 1-inch sieves (ASTM D422) and meet the gradation requirements in the table below:

Particle Size
(ASTM D422)
% Passing by
Weight
1 inch 99-100
½ inch 90-100
¼ inch 40-90
#200 2-10
BIO-1: Biofiltration
County of Los Angeles E-63 February 2014
Tests should be sufficiently recent to represent the actual material that is anticipated to be delivered to the site. If processes or sources used by the supplier have changed significantly since the most recent testing, new tests should be requested.

The gradation of compost used in biofiltration soil media is believed to play an important role in the saturated infiltration rate of the media. To achieve a higher saturated infiltration rate, it may be necessary to utilize compost at the coarser end of the range (minimum percent passing). The percent passing the #200 sieve (fines) is believed to be the most important factor in hydraulic conductivity.

In addition, coarser compost mix provides more heterogeneity of the biofiltration soil media, which is believed to be advantageous for more rapid development of soil structure needed to support healthy biological processes. This may be an advantage for plant establishment with lower nutrient and water input. • Biofiltration soil media not meeting the above criteria should be evaluated on a case-by-case basis. Alternative biofiltration soil media must meet the following specifications:
“Soils for biofiltration facilities must be sufficiently permeable to infiltrate stormwater runoff at a minimum of rate of 5 in/hr during the life of the facility, and provide sufficient retention of moisture and nutrients to support healthy vegetation.” The following steps shall be followed by LACDPW to verify that alternative biofiltration soil media mixes meet the specification:
o Submittals – The applicant must submit to LACDPW for approval:
A sample of mixed biofiltration soil media.
Certification from the soil supplier or an accredited laboratory that the biofiltration soil media meets the requirements of this specification.
Certification from an accredited geotechnical testing laboratory that the biofiltration soil media has an infiltration rate between 5 and 12 in/hr.
Organic content test results of the biofiltration soil media. Organic content test shall be performed in accordance with the Testing Methods for the Examination of Compost and Composting
(TMECC) 05.07A, “Loss-On-Ignition Organic Matter Method”. Organic grain size analysis results of mixed biofiltration soil media performed in accordance with ASTM D422, Standard Test Method for Particle Size Analysis of Soils.
A description of the equipment and methods used to mix the sand and compost to produce the biofiltration soil media.
o The name of the testing laboratory(ies) and the following information:

BIO-1: Biofiltration
County of Los Angeles E-64 February 2014
Contact person(s)
Address(es)
Phone contact(s)
E-mail address(es)
Qualifications of laboratory(ies) and personnel including date of current certification by STA, ASTM, or approved equal.
o Biofiltration soils shall be analyzed by an accredited laboratory using #200 and ½-inch sieves (ASTM D422 or as approved by LACDPW), and meet the gradation described in the table below:

Particle Size
(ASTM D422)
% Passing by
Weight
½ inch 97-100
#200 2-5
• Biofiltration soil media shall be analyzed by an accredited geotechnical laboratory for the following tests:
o Moisture – density relationships (compaction tests) must be conducted on biofiltration soil media. Biofiltration soil media for the permeability test shall be compacted to 85 to 90 percent of the maximum dry density (ASTM D1557).
o Constant head permeability testing in accordance with ASTM D2434 shall be conducted on a minimum of two samples with a 6-inch mold and vacuum saturation.
• Mulch is recommended for the purpose of retaining moisture, preventing erosion, and minimizing weed growth. Projects subject to the California Model Water Efficiency Landscaping Ordinance (or comparable local ordinance) will be required to provide at least 2 inches of mulch. Aged mulch, also called compost mulch, reduces the ability of weeds to establish, keeps soil moist, and replenishes soil nutrients. Biofiltration areas must be covered with two to four inches (average three inches) of mulch at the start and an annual placement (preferably in June after weeding) of one to two inches of mulch beneath plants. • The planting media design height must be marked appropriately, such as a collar on the overflow device or with a stake inserted two feet into the planting media and notched, to show biofiltration surface level and ponding level.

Vegetation
Prior to installation, a licensed landscape architect must certify that all plants, unless otherwise specifically permitted, conform to the standards of the current edition of American Standard for Nursery Stock as approved by the American Standards Institute, Inc. All plant grades shall be those established in the current edition of American Standards for Nursery Stock.

BIO-1: Biofiltration
County of Los Angeles E-65 February 2014
• Shade trees must have a single main trunk. Trunks must be free of branches below the following heights:

CALIPER (in) Height (ft)
1½-2½ 5
3 6
• Plants must be tolerant of summer drought, ponding fluctuations, and saturated soil conditions for 96 hours.
• It is recommended that a minimum of three types of tree, shrubs, and/or herbaceous groundcover species be incorporated to protect against facility failure due to disease and insect infestations of a single species. • Native plant species and/or hardy cultivars that are not invasive and do not require chemical inputs must be used to the maximum extent practicable.

The biofiltration area should be vegetated to resemble a terrestrial forest community ecosystem, which is dominated by understory trees, a shrub layer, and herbaceous ground cover. Select vegetation that:
• Is suited to well-drained soil;
• Will be dense and strong enough to stay upright, even in flowing water; • Has minimum need for fertilizers;
• Is not prone to pests and is consistent with Integrated Pest Management practices; and
• Is consistent with local water conservation ordinance requirements.

Irrigation System
Provide an irrigation system to maintain viability of vegetation, if applicable. The irrigation system must be designed to local code or ordinance specifications.

Restricted Construction Materials
The use of pressure-treated wood or galvanized metal at or around a biofiltration area is prohibited.

Overflow Device
An overflow device is required at the 18-inch ponding depth. The following, or equivalent, should be provided:
• A vertical PVC pipe (SDR 26) to act as an overflow riser. • The overflow riser(s) should be eight inches or greater in diameter, so it can be cleaned without damage to the pipe.

BIO-1: Biofiltration
County of Los Angeles E-66 February 2014
• The inlet to the riser should be at the ponding depth (18 inches for fenced biofiltration areas and 6 inches for areas that are not fenced), and be capped with a spider cap to exclude floating mulch and debris. Spider caps should be screwed in or glued (e.g., not removable). The overflow device should convey stormwater runoff in excess of 1.5 times the SWQDv that is not reliably retained on the project site to an approved discharge location (another stormwater quality control measure, storm drain system, or receiving water).

Maintenance Requirements
Maintenance and regular inspections are important for proper function of biofiltration areas. Biofiltration areas require annual plant, soil, and mulch layer maintenance to ensure optimal infiltration, storage, and pollutant removal capabilities. In general, biofiltration maintenance requirements are typical landscape care procedures and include:
• Irrigate plants as needed during prolonged dry periods. In general, plants should be selected to be drought-tolerant and not require irrigation after establishment (two to three years).
• Inspect flow entrances, ponding area, and surface overflow areas periodically, and replace soil, plant material, and/or mulch layer in areas if erosion has occurred. Properly-designed facilities with appropriate flow velocities should not cause erosion except potentially during in extreme events. If erosion occurs, the flow velocities and gradients within the biofiltration area and flow dissipation and erosion protection strategies in the pretreatment area and flow entrance should be reassessed. If sediment is deposited in the biofiltration area, identify the source of the sediment within the tributary area, stabilize the source, and remove excess surface deposits.
• Prune and remove dead plant material as needed. Replace all dead plants, and if specific plants have a high mortality rate, assess the cause and, if necessary, replace with more appropriate species.
• Remove weeds as needed until plants are established. Weed removal should become less frequent if the appropriate plant species are used and planting density is attained.
• Select the proper soil mix and plants for optimal fertility, plant establishment, and growth to preclude the use of nutrient and pesticide supplements. By design, biofiltration facilities are located in areas where phosphorous and nitrogen levels are often elevated such that these should not be limiting nutrients. Addition of nutrients and pesticides may contribute pollutant loads to receiving waters. • In areas where heavy metals deposition is likely (i.e., tributary areas to industrial, vehicle dealerships/repair, parking lots, roads), replace mulch annually. In areas where metals deposition is less likely (i.e., residential lots), replace or add mulch as needed to maintain a two to three inch depth at least once every two years.

BIO-1: Biofiltration
County of Los Angeles E-67 February 2014
• Analyze soil for fertility and pollutant levels if necessary. Biofiltration soil media are designed to maintain long-term fertility and pollutant processing capability. • Eliminate standing water to prevent vector breeding.
• Inspect overflow devices for obstructions or debris, which should be removed immediately. Repair or replace damaged pipes upon discovery. • Inspect, and clean if necessary, the underdrain.

A summary of potential problems that need to be addressed by maintenance activities is presented in Table E-13.

The County requires execution of a maintenance agreement to be recorded by the property owner for the on-going maintenance of any privately-maintained stormwater quality control measures. The property owner is responsible for compliance with the maintenance agreement. A sample maintenance agreement is presented in Appendix H.

BIO-1: Biofiltration
County of Los Angeles E-68 February 2014
Table E-13. Biofiltration Troubleshooting Summary
Problem Conditions When Maintenance Is
Needed Maintenance Required
Vegetation Overgrown vegetation Mow and prune vegetation as appropriate.

Presence of invasive, poisonous,
nuisance, or noxious vegetation or
weeds
Remove this vegetation and
plant native species as needed.

Trash and Debris Trash, plant litter, and dead leaves
present
Remove and properly dispose of
trash and debris.

Irrigation (if applicable) Not functioning correctly Check irrigation system for clogs or broken lines and repair as
needed.

Inlet/Overflow Inlet/overflow areas clogged with
sediment and/or debris
Remove material.

Overflow pipe blocked or broken Repair as needed.

Erosion/Sediment
Accumulation
Splash pads or spreader incorrectly
placed
Presence of erosion or sediment
accumulation
Check inlet structure to ensure
proper function. Repair, or
replace if necessary, the inlet
device. Repair eroded areas
with gravel as needed. Re-grade
the biofiltration area as needed.

Contaminants and Pollution Any evidence of oil, gasoline, contaminants, or other pollutants
Remove any evidence of visual
contamination from floatables
such as oil and grease.

Standing water Standing water observed more
than 96 hours after storm event
Inspect, and clean as needed,
the underdrain to ensure proper
function. Clear clogs as needed.

Remove and replace planter
media (sand, gravel, topsoil,
mulch) and vegetation.

Preliminary Low Impact Development Plan
Concord, Compton
Appendix C:

Modular Wetlands System (MWS) Biofiltration Vaults
Typical MWS Biofiltration Vault details have been provided for this Preliminary LID.

Project specific details will be provided during final engineering.

MWS – Linear
Hybrid Stormwater Filtration System

SPECIFICATIONS

Modular Wetland Systems, Inc. www.modularwetlands.com
P.O. Box 869 P 760-433-7640
Oceanside, CA 92049 F 760-433-3179
MWS – Linear
Hybrid Stormwater Filtration System
Save valuable space with small
otprint for urban sites.
d tropical
ndscape plants.
er and
ss expensive maintenance
ystem
unoff is
in
d
ischarge chamber the rate of discharge is controlled by valves set to a desired rate”. ested Pollutant Removal Efficiencies:
fo
Improve BMP aesthetics with
attractive native an
la
Reduce lifetime costs with saf
le
“The MWS – Linear hybrid stormwater
treatment system is described as a self contained treatment train. This system utilizes an innovative combination of l treatment processes. Stormwater runoff flows into the s via pipe or curb/grate type catch basin opening. Polluted runoff first encounters a screening device to remove larger pollutants and then enters a hydrodynamic separation chamber which settles out the sediments and larger suspended solids. Next the r treated by a revolutionary filter media, BioMediaGREEN that removes fines and associated pollutants, including bacteria. From there runoff enters of bioretention filter the form of a subsurface flow vegetated gravel wetland. Within the wetland physical, chemical, and biological mechanisms remove the remaining particulate and dissolve pollutants. The purified runoff leaves the system via the discharge chamber. In the d
T
Removal
Di d
Removal
D
Removal
TPH Removal Removal
TSS ssolve
Lead
issolved
Copper E. coli Turbidity
98% 81% 92% 99% 60.2% 92%

“Nature and Harmony Working Together in Perfect Harmony” SPECIFICATIONS – MWS- LINEAR
gaged in the engineering design and
roduction of treatment systems for stormwater.
treat the entire water quality
olume when used with pre-storage and properly sized.
ls.
g
¾” x 1
nels are
g
ted of UV protected/marine grade
berglass and stainless steel hinge and mount.
uires
tails of this are provided in the installation section of the WS-Linear Design Kit.

Track Record: The MWS- Linear Hybrid Stormwater Treatment System is manufactured by a company whom is regularly en
p
Coverage: The MWS- Linear is designed to treat the water quality volume or water quality flow. For flow based design, high flow bypass is internal, for volume based design, high flow bypass is external and prior to pre-detention system. For offline volume based designs the MWS - Linear has the ability to v
Non-Corrosive Materials: The MWS – Linear is designed with non-corrosive materia All internal piping is SD35 PVC. Catch basin filter components, including mountin hardware, fasteners, support brackets, filtration material, and support frame are constructed of non-corrosive materials (316 stainless steel, and UV protected/marine grade fiberglass). Fasteners are stainless steel. Primary filter mesh is 316 stainless steel welded screens. Filtration basket screens for coarse, medium and fine filtration is ¾“expanded, 10 x 10 mesh, and 35 x 35 mesh, respectively. No polypropylene, monofilament netting or fabrics shall be used in this system. Media Protective Pa constructed of UV protected/marine grade fiberglass. Mounts are constructed of stainless steel. BioMediaGREEN is an inert rock substrate and is non-corrosive.

Perimeter filter structure is constructed of lightweight injection molded plastic. Mountin brackets are constructed of SD40 PVC and are mounted with 3/8” diameter stainless steel redheads. Drain down filter cover is construc
fi
Weight: Each complete unit weighs approximately 29,000 to 40,000 pounds and req a boom crane to install. De
M
Transportation: The Modular Wetland System – Linear is designed to be transported a standard flat bed t
on
ruck. The unit easily fits on a flat bed truck without the need of pecial permitting.
d
noff can enter the system through a pipe, and/or a
uilt in curb or grate type opening.
etland System – Linear is completely passive and
quires no external energy sources.
he
tation. As a precaution a footing can
lso be built into the systems concrete structure.
re
o slippage, breaking, or tearing. All filters are warranted for a minimum of five (5) years. e
hydrocarbon removal abilities. Within the wetland filter biological processes capture and s
Alternative Technology Configurations: The Modular Wetland System – Linear is modular is design. Each module will be up to 22 feet long and 5 feet wide. The system can be made in lengths varying from 13 to 100s of feet long. For lengths longer than 22 feet the system will shipped in modules and assembled on site. The Modular Wetlan System – Linear has many alternative configurations. This allows the system to be adapted to many site conditions. Ru
b
Energy Requirements: The Modular W
re
Buoyancy Issues: Buoyancy is only a an issue when ground water levels rise above t bottom of the Modular Wetland System – Linear’s concrete structure. With 8.5 cubic yards of wetland media there is no concern of floa
a
Durability: The structure of the box will be precast concrete. The concrete will be 28 day compressive strength fc = 5,000 psi. Steel reinforcing will be ASTM A – C857. Structu will support an H20 loading as indicted by AASHTO. The joint between the concrete sections will ship lap and joint sealed with ram-nek. Filter (excluding oil absorbent media) and support structures are of proven durability. The filter and mounting structures are of sufficient strength to support water, sediment, and debris loads when the filter is full, with n
Oil Absorbent Media: The MWS – Linear utilizes both physical and biological mechanisms to capture and filter oil and grease. A skimmer and boom system will b positioned on the internal perimeter of the catch basin insert. The primary filtration media, BioMediaGreen, utilized in the perimeter and drain down filters, has excellent break down oil and grease. Much of the breakdown and transformation of oil and grease performed by natural occurring bacteria.
n system. For
eak flows that exceed internal bypass capacity, external bypass is use. for internally bypassed flows. External bypass will bypass of eatment processes.
ze. Annual
een and quarter-scale
boratory tests on the MWS – Linear flow based system.

POLLUTANT

FICIENCY
is
Overflow Protection: The grate and curb type MWS – Linear are designed with an internal bypass consisting of two SD PVC pipes which direct high flows around the perimeter and wetland filter, directly into the discharge chamber. For the volume based vault type configuration, bypass should be located prior to the pre-detentio p
Filter Bypass: Runoff will bypass filtration (BioMediaGREEN and wetland filter) components of the MWS - Linear. The system will still provide screening and settling during higher flow rates
tr
Pollutant Removal Efficiency: The MWS - Linear is capable of removing over 90% of the net annual total suspended solids (TSS) load based on a 20-micron particle si TSS removal efficiency models are based on documented removal efficiency performance from full-scale laboratory tests on BioMediaGr la

REMOVAL
EF
Trash & Litter 99%
TPH (mg/L) 99%
TSS (mg/L) 98%
E. Coli (MPN/100ml) 60%
Turbidity (NTU) 92%
Dissolved Metals (mg/L) 76%
Non-Scouring: During heavy storm events the runoff bypasses perimeter and wetland lter components. The system will not re-suspend solids at design flows. rticle
diameter = 19 microns
Sil-Co-Sil 106. Mean pa
fi
Uniqueness: The Modular Wetland System – Linear is a complete self contain treatment train that incorporates capture, screening, sedimentation, filtration, bioretention, high flow bypass, and flow control into a single modular structure. This system provides four stages of treatment making it the only 4 stage treatment train stormwater filtration system, therefore making it unique to the industry. Other s not incorporate all the necessary attributes to make it a complete stormwater management device as
ed
ystems do
with the Modular Wetland System – Linear. Therefore, no equal xists for this system.
ter management system no external
retreatment of preconditioning is necessary.

PECIFICATIONS – BioMediaGREEN
se
nd is also biodegradable. It is stable with no
nown adverse environmental effects.
injection) studies have
hown that the products disappear very rapidly from the lung. dies that show no relation between inhalation exposure
nd the development of tumors.
e
Pretreatment & Preconditioning: Since the Modular Wetland System – Linear is a complete capture and treatment train stormwa
p
S

BioMediaGREEN is a proprietary engineered filter media. Made of a unique combination of the inert naturally occurring material this product is non-combustible and do not po a fire hazard, stable and non-reactive, a
k
This product has been tested in long-term carcinogenicity studies [inhalation and intraperitoneal injection (i.p.)] with no significant increase in lung tumors or abdominal tumors. Short-term biopersistent (inhalation and intra-tracheal s
In October 2001, IARC classified this product as Group 3, "not classifiable as to its carcinogenicity to humans". The 2001 decision was based on the latest epidemiological studies and animal inhalation stu
a
The product can typically be disposed of in an ordinary landfill (local regulations may apply). If you are unsure of the regulations, contact your local Public Health Department r the local office of the Environmental Protection Agency (EPA). nt
REEN
ut
ut filters, catch basin inserts,
ater polishing units, and hydrodynamic separators.
ve Materials: The BioMediaGreen material is made of non-corrosive aterials.

MediaGREEN material has been tested through
gorous flow and loading conditions.
has been proven to capture and
tain hydrocarbons.
and
liage, sediments, TSS, particulate and dissolved
etals, nutrients, and bacteria.
le
o
Coverage: When properly installed BioMediaGREEN Filter Blocks provide sufficie contact time, at rated flows, of passing contaminate water. The BioMediaG material will capture and retain most pollutants that pass through it. The BioMediaGREEN material is made of a proprietary blend of inert substances. The BioMediaGREEN Filter Blocks can be used in different treatment devices, including b not limited to flume filters, trench drain filters, downspo w
Non-Corrosi
m
Durability: The BioMediaGREEN material has been chosen for its proven durability, with an expected life of 2 plus years. The BioMediaGREEN material is of sufficient strength to support water, sediment, and debris loads when the media is at maximum flow; with no slippage, breaking, or tearing. The Bio
ri
Oil Absorbent Media: The BioMediaGREEN material
re
Pollutant Removal Efficiency: The BioMediaGREEN Filter Blocks are designed to capture high levels of Hydrocarbons including but not limited to oils & grease, gasoline, diesel, and PAHs. BioMediaGREEN Filter Blocks have the physical ability to block filter trash and litter, grass and fo
m
BioMediaGREEN technology is based on a proprietary blend of synthetic inert natural substances aimed at removal of various stormwater pollutants. BioMediaGREEN was created to have a very porous structure capable of selectively removing pollutants whi allowing high flow through rates for water. As pollutants are captured by its structure, ioMediaGREEN captures most pollutants and maintains porosity and filtering rge percentage of TSS, hydrocarbons, nutrients, and heavy metals. Microbial reduction ary depending on colony size, flow rates and site specific conditions.

REMOVAL

EFFICIENCY
B
capabilities.

Field and laboratory tests have confirmed the BioMediaGREEN capability to capture la
efficiency will v

POLLUTANT
Oil & Grease (mg/L) 90%
TPH (mg/L) 99%
TSS (mg/L) 85%
Turbidity (NTU) 99%
Total Phosphorus (mg/L) 69.6%
Dissolved Metals (mg/L) 75.6%
Replacement: Removal and replacement of the blocks is simple. Remove blocks from ltration system. Replace with new block of equal size.

Sil-Co-Sil 106. Mean particle
diameter = 19 microns
fi
www.modularwetlands.com

Maintenance Guidelines for
Modular Wetland System - Linear
Maintenance Summary
o Remove Trash from Screening Device – average maintenance interval is 6 to 12 months.  (5 minute average service time).
o Remove Sediment from Separation Chamber – average maintenance interval is 12 to 24 months.  (10 minute average service time).
o Replace Cartridge Filter Media – average maintenance interval 12 to 24 months.  (10-15 minute per cartridge average service time).
o Replace Drain Down Filter Media – average maintenance interval is 12 to 24 months.  (5 minute average service time).
o Trim Vegetation – average maintenance interval is 6 to 12 months.  (Service time varies).

System Diagram

Access to screening device, separation
chamber and cartridge filter
Access to drain
down filter
Pre-Treatment
Chamber
Biofiltration Chamber
Discharge
Chamber
Outflow
Pipe
Inflow Pipe
(optional)
www.modularwetlands.com
Maintenance Procedures
Screening Device

1. Remove grate or manhole cover to gain access to the screening device in the PreTreatment Chamber. Vault type units do not have screening device. Maintenance can be performed without entry.

2. Remove all pollutants collected by the screening device. Removal can be done manually or with the use of a vacuum truck. The hose of the vacuum truck will not damage the screening device.

3. Screening device can easily be removed from the Pre-Treatment Chamber to gain access to separation chamber and media filters below. Replace grate or manhole cover when completed.

Separation Chamber

1. Perform maintenance procedures of screening device listed above before maintaining the separation chamber.

2. With a pressure washer spray down pollutants accumulated on walls and cartridge filters.

3. Vacuum out Separation Chamber and remove all accumulated pollutants. Replace screening device, grate or manhole cover when completed.

Cartridge Filters

1. Perform maintenance procedures on screening device and separation chamber before maintaining cartridge filters.

2. Enter separation chamber.

3. Unscrew the two bolts holding the lid on each cartridge filter and remove lid.

4. Remove each of 4 to 8 media cages holding the media in place.

5. Spray down the cartridge filter to remove any accumulated pollutants.

6. Vacuum out old media and accumulated pollutants.

7. Reinstall media cages and fill with new media from manufacturer or outside supplier. Manufacturer will provide specification of media and sources to purchase.

8. Replace the lid and tighten down bolts. Replace screening device, grate or manhole cover when completed.

Drain Down Filter

1. Remove hatch or manhole cover over discharge chamber and enter chamber.

2. Unlock and lift drain down filter housing and remove old media block. Replace with new media block. Lower drain down filter housing and lock into place.

3. Exit chamber and replace hatch or manhole cover.
www.modularwetlands.com
Maintenance Notes

1. Following maintenance and/or inspection, it is recommended the maintenance operator prepare a maintenance/inspection record. The record should include any maintenance activities performed, amount and description of debris collected, and condition of the system and its various filter mechanisms.

2. The owner should keep maintenance/inspection record(s) for a minimum of five years from the date of maintenance. These records should be made available to the governing municipality for inspection upon request at any time.

3. Transport all debris, trash, organics and sediments to approved facility for disposal in accordance with local and state requirements.

4. Entry into chambers may require confined space training based on state and local regulations.

5. No fertilizer shall be used in the Biofiltration Chamber.

6. Irrigation should be provided as recommended by manufacturer and/or landscape architect. Amount of irrigation required is dependent on plant species. Some plants may require irrigation.

www.modularwetlands.com

Maintenance Procedure Illustration
Screening Device
The screening device is located directly
under the manhole or grate over the
Pre-Treatment Chamber. It’s mounted
directly underneath for easy access
and cleaning. Device can be cleaned by
hand or with a vacuum truck.

Separation Chamber
The separation chamber is located
directly beneath the screening device.

It can be quickly cleaned using a
vacuum truck or by hand. A pressure
washer is useful to assist in the
cleaning process.

www.modularwetlands.com

Cartridge Filters
The cartridge filters are located in the
Pre-Treatment chamber connected to
the wall adjacent to the biofiltration
chamber. The cartridges have
removable tops to access the
individual media filters. Once the
cartridge is open media can be
easily removed and replaced by hand
or a vacuum truck.

Drain Down Filter
The drain down filter is located in the
Discharge Chamber. The drain filter
unlocks from the wall mount and hinges
up. Remove filter block and replace with
new block.
www.modularwetlands.com
Trim Vegetation
Vegetation should be maintained in the
same manner as surrounding vegetation
and trimmed as needed. No fertilizer shall
be used on the plants. Irrigation
per the recommendation of the
manufacturer and or landscape
architect. Different types of vegetation
requires different amounts of
irrigation.

www.modularwetlands.com
Inspection Form
Modular Wetland System, Inc.

Yes No
Modular Wetland System Type (Curb, Grate or UG Vault): Size (22', 14' or etc.):

Other Inspection Items:

Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes Office personnel to complete section to
the left.
2972 San Luis Rey Road, Oceanside, CA 92058 P (760) 433-7640 F (760) 433-3176 Inspection Report
Modular Wetlands System

Is the filter insert (if applicable) at capacity and/or is there an accumulation of debris/trash on the shelf system? Does the cartridge filter media need replacement in pre-treatment chamber and/or discharge chamber? Any signs of improper functioning in the discharge chamber? Note issues in comments section.

Chamber:

Is the inlet/outlet pipe or drain down pipe damaged or otherwise not functioning properly? Structural Integrity:

Working Condition:

Is there evidence of illicit discharge or excessive oil, grease, or other automobile fluids entering and clogging the unit?
Is there standing water in inappropriate areas after a dry period? Damage to pre-treatment access cover (manhole cover/grate) or cannot be opened using normal lifting pressure?
Damage to discharge chamber access cover (manhole cover/grate) or cannot be opened using normal lifting pressure?
Does the MWS unit show signs of structural deterioration (cracks in the wall, damage to frame)? Project Name
Project Address
Inspection Checklist
No Comments
Does the depth of sediment/trash/debris suggest a blockage of the inflow pipe, bypass or cartridge filter? If yes, specify which one in the comments section. Note depth of accumulation in in pre-treatment chamber.

Is there a septic or foul odor coming from inside the system? Is there an accumulation of sediment/trash/debris in the wetland media (if applicable)? Is it evident that the plants are alive and healthy (if applicable)? Please note Plant Information below.

Sediment / Silt / Clay
Trash / Bags / Bottles
Green Waste / Leaves / Foliage
Waste: Plant Information
No Cleaning Needed
Recommended Maintenance
Additional Notes:

Damage to Plants
Plant Replacement
Plant Trimming
Schedule Maintenance as Planned
Needs Immediate Maintenance
www.modularwetlands.com
Maintenance Report
Modular Wetland System, Inc.

P. 760.433-7640
F. 760-433-3176
E. [email protected]
For Office Use Only
(city) (Zip Code) (Reviewed By)
Owner / Management Company
(Date)
Contact Phone ( ) _
Inspector Name Date / / Time AM / PM
Weather Condition Additional Notes
Site
Map #
Comments:
2972 San Luis Rey Road, Oceanside, CA 92058 P. 760.433.7640 F. 760.433.3176 Inlet and Outlet
Pipe Condition
Drain Down Pipe
Condition
Discharge Chamber
Condition
Drain Down Media
Condition
Plant Condition
Media Filter
Condition
Long:

MWS
Sedimentation
Basin
Total Debris
Accumulation
Condition of Media
25/50/75/100
(will be changed
@ 75%)
Operational Per
Manufactures'
Specifications
(If not, why?)
Lat: MWS
Catch Basins
GPS Coordinates
of Insert
Manufacturer /
Description / Sizing
Trash
Accumulation
Foliage
Accumulation
Sediment
Accumulation
Type of Inspection Routine Follow Up Complaint Storm Storm Event in Last 72-hours? No Yes Office personnel to complete section to
the left.

Project Address
Project Name
Cleaning and Maintenance Report
Modular Wetlands System
Preliminary Low Impact Development Plan
Concord, Compton
Appendix D:
“NO DUMPING – DRAINS TO OCEAN” Stencil Examples
Sample Stencil 1
Sample Stencil 2
Preliminary Low Impact Development Plan
Concord, Compton
Appendix E:

Catch Basin Cleaning

Preliminary Low Impact Development Plan
Concord, Compton
Appendix F:

General Education Materials
To be provided during final engineering
Preliminary Low Impact Development Plan
Concord, Compton
Appendix G:

Operation and Maintenance Plan
To be provided during final engineering
Preliminary Low Impact Development Plan
Concord, Compton
Appendix H:

Geotechnical Investigation

Preliminary Low Impact Development Plan
Concord, Compton
Preparation Date: August 2019
Revised: March 2021
Preliminary Low Impact Development (LID) Plan
Prepared for: